# -*- coding: utf-8 -*-
from __future__ import annotations
import base64
import binascii
import bisect
import hashlib
import json
import os
import lzma
import random
import re
import struct
import tempfile
import concurrent.futures
import queue
import threading
import time
from collections.abc import Mapping
from http.server import BaseHTTPRequestHandler, ThreadingHTTPServer
from html.parser import HTMLParser
from typing import Any
from urllib.parse import parse_qs, quote, urlencode, urlparse
import requests
try:
    from cryptography.hazmat.primitives import hashes
    from cryptography.hazmat.primitives.ciphers import Cipher, algorithms, modes
except ImportError:
    hashes = None
    Cipher = algorithms = modes = None
try:
    from Crypto.Cipher import AES as CryptoAES
except ImportError:
    CryptoAES = None
try:
    from base.spider import Spider as _BaseSpider
except Exception:
    try:
        import sys as _sys
        _sys.path.append("..")
        from base.spider import Spider as _BaseSpider
    except Exception:
        class _BaseSpider:
            pass

# FongMi/TVBox 的 Chaquopy 环境未必带 cryptography，多数壳只带 pycryptodome。
# 统一入口，避免调用点直接依赖某一个库。
if Cipher is not None:
    AES_BACKEND = "cryptography"
elif CryptoAES is not None:
    AES_BACKEND = "pycryptodome"
else:
    AES_BACKEND = "none"

class _PureAES128:
    """纯 Python AES-128，供无 pycryptodome/cryptography 的壳使用。"""

    _S = (
        99,124,119,123,242,107,111,197,48,1,103,43,254,215,171,118,202,130,201,125,250,89,71,240,
        173,212,162,175,156,164,114,192,183,253,147,38,54,63,247,204,52,165,229,241,113,216,49,21,
        4,199,35,195,24,150,5,154,7,18,128,226,235,39,178,117,9,131,44,26,27,110,90,160,82,59,214,
        179,41,227,47,132,83,209,0,237,32,252,177,91,106,203,190,57,74,76,88,207,208,239,170,251,67,
        77,51,133,69,249,2,127,80,60,159,168,81,163,64,143,146,157,56,245,188,182,218,33,16,255,243,
        210,205,12,19,236,95,151,68,23,196,167,126,61,100,93,25,115,96,129,79,220,34,42,144,136,70,
        238,184,20,222,94,11,219,224,50,58,10,73,6,36,92,194,211,172,98,145,149,228,121,231,200,55,
        109,141,213,78,169,108,86,244,234,101,122,174,8,186,120,37,46,28,166,180,198,232,221,116,31,
        75,189,139,138,112,62,181,102,72,3,246,14,97,53,87,185,134,193,29,158,225,248,152,17,105,
        217,142,148,155,30,135,233,206,85,40,223,140,161,137,13,191,230,66,104,65,153,45,15,176,84,
        187,22
    )
    _RCON = (0x00,0x01,0x02,0x04,0x08,0x10,0x20,0x40,0x80,0x1B,0x36)

    def __init__(self, key: bytes):
        if len(key) != 16:
            raise ValueError("AES-128 only")
        self._rk = self._expand(key)

    def _expand(self, key: bytes):
        s = self._S
        w = list(key)
        for i in range(4, 44):
            t0, t1, t2, t3 = w[-4], w[-3], w[-2], w[-1]
            if i % 4 == 0:
                t0, t1, t2, t3 = s[t1], s[t2], s[t3], s[t0]
                t0 ^= self._RCON[i // 4]
            base = (i - 4) * 4
            w.extend((w[base] ^ t0, w[base + 1] ^ t1, w[base + 2] ^ t2, w[base + 3] ^ t3))
        return w

    @staticmethod
    def _xtime(a: int) -> int:
        return ((a << 1) ^ 0x1B) & 0xFF if (a & 0x80) else ((a << 1) & 0xFF)

    def encrypt_block(self, block: bytes) -> bytes:
        s = list(block)
        rk = self._rk
        for i in range(16):
            s[i] ^= rk[i]
        for rnd in range(1, 10):
            s = [self._S[b] for b in s]
            s = [s[0], s[5], s[10], s[15], s[4], s[9], s[14], s[3],
                 s[8], s[13], s[2], s[7], s[12], s[1], s[6], s[11]]
            for c in range(4):
                i = c * 4
                a, b, c0, d = s[i], s[i + 1], s[i + 2], s[i + 3]
                t = a ^ b ^ c0 ^ d
                u = a
                a ^= t ^ self._xtime(a ^ b)
                b ^= t ^ self._xtime(b ^ c0)
                c0 ^= t ^ self._xtime(c0 ^ d)
                d ^= t ^ self._xtime(d ^ u)
                s[i], s[i + 1], s[i + 2], s[i + 3] = a, b, c0, d
            off = rnd * 16
            for i in range(16):
                s[i] ^= rk[off + i]
        s = [self._S[b] for b in s]
        s = [s[0], s[5], s[10], s[15], s[4], s[9], s[14], s[3],
             s[8], s[13], s[2], s[7], s[12], s[1], s[6], s[11]]
        for i in range(16):
            s[i] ^= rk[160 + i]
        return bytes(s)

    def decrypt_block(self, block: bytes) -> bytes:
        def mul(a, b):
            p = 0
            for _ in range(8):
                if b & 1:
                    p ^= a
                hi = a & 0x80
                a = (a << 1) & 0xFF
                if hi:
                    a ^= 0x1B
                b >>= 1
            return p

        s = list(block)
        rk = self._rk
        for i in range(16):
            s[i] ^= rk[160 + i]
        for rnd in range(9, 0, -1):
            s = [s[0], s[13], s[10], s[7], s[4], s[1], s[14], s[11],
                 s[8], s[5], s[2], s[15], s[12], s[9], s[6], s[3]]
            s = [self._SI[b] for b in s]
            off = rnd * 16
            for i in range(16):
                s[i] ^= rk[off + i]
            for c in range(4):
                i = c * 4
                a, b, c0, d = s[i], s[i + 1], s[i + 2], s[i + 3]
                s[i] = mul(a, 0x0E) ^ mul(b, 0x0B) ^ mul(c0, 0x0D) ^ mul(d, 0x09)
                s[i + 1] = mul(a, 0x09) ^ mul(b, 0x0E) ^ mul(c0, 0x0B) ^ mul(d, 0x0D)
                s[i + 2] = mul(a, 0x0D) ^ mul(b, 0x09) ^ mul(c0, 0x0E) ^ mul(d, 0x0B)
                s[i + 3] = mul(a, 0x0B) ^ mul(b, 0x0D) ^ mul(c0, 0x09) ^ mul(d, 0x0E)
        s = [s[0], s[13], s[10], s[7], s[4], s[1], s[14], s[11],
             s[8], s[5], s[2], s[15], s[12], s[9], s[6], s[3]]
        s = [self._SI[b] for b in s]
        for i in range(16):
            s[i] ^= rk[i]
        return bytes(s)



_PureAES128._SI = tuple({v: i for i, v in enumerate(_PureAES128._S)}[i] for i in range(256))


def _pure_ctr_decrypt(key: bytes, counter: bytes, data: bytes) -> bytes:
    if not data:
        return b""
    if len(counter) < 16:
        counter = counter.ljust(16, b"\0")
    else:
        counter = counter[:16]
    aes = _PureAES128(key)
    ctr = int.from_bytes(counter, "big")
    out = bytearray()
    for offset in range(0, len(data), 16):
        ks = aes.encrypt_block(ctr.to_bytes(16, "big"))
        ctr = (ctr + 1) & ((1 << 128) - 1)
        chunk = data[offset:offset + 16]
        out.extend(c ^ k for c, k in zip(chunk, ks))
    return bytes(out)


def _pure_cbc_decrypt(key: bytes, iv: bytes, data: bytes) -> bytes:
    if not data:
        return b""
    if len(data) % 16:
        data = data[: len(data) - (len(data) % 16)]
    aes = _PureAES128(key)
    prev = (iv[:16] if len(iv) >= 16 else iv).ljust(16, b"\0")
    out = bytearray()
    for i in range(0, len(data), 16):
        block = data[i:i + 16]
        dec = aes.decrypt_block(block)
        out.extend(d ^ p for d, p in zip(dec, prev))
        prev = block
    return bytes(out)


def _aes_ctr_decrypt(key: bytes, counter: bytes, data: bytes) -> bytes:
    if not data:
        return b""
    if AES_BACKEND == "cryptography":
        decryptor = Cipher(algorithms.AES(key), modes.CTR(counter)).decryptor()
        return decryptor.update(data) + decryptor.finalize()
    if AES_BACKEND == "pycryptodome":
        cipher = CryptoAES.new(
            key, CryptoAES.MODE_CTR, nonce=b"", initial_value=counter
        )
        return cipher.decrypt(data)
    return _pure_ctr_decrypt(key, counter, data)


def _aes_cbc_decrypt(key: bytes, iv: bytes, data: bytes) -> bytes:
    if not data:
        return b""
    if AES_BACKEND == "cryptography":
        decryptor = Cipher(algorithms.AES(key), modes.CBC(iv)).decryptor()
        return decryptor.update(data) + decryptor.finalize()
    if AES_BACKEND == "pycryptodome":
        return CryptoAES.new(key, CryptoAES.MODE_CBC, iv).decrypt(data)
    return _pure_cbc_decrypt(key, iv, data)


SITE = "https://hongguoduanju.com"
EPISODE_PREFIX = "hg-episode-v1:"
# 红果每集视频模型按清晰度返回多条独立线路（360/480/540/720/1080），
# 每条带 main_url + backup_url 双 CDN 与独立加密材料。这里把清晰度作为
# TVBox 多线路暴露；内封音/视轨在解密 _rewrite_moov 时天然全部保留。
_HG_QUALITY_LINES = (
    ("1080", "红果超清"),
    ("720",  "红果高清"),
    ("540",  "红果标准"),
    ("480",  "红果流畅"),
    ("360",  "红果极速"),
)
_QUALITY_LINE_NAME_TO_Q = {
    "超清": "1080", "高清": "720", "标准": "540",
    "流畅": "480", "极速": "360", "1080": "1080", "720": "720",
    "540": "540", "480": "480", "360": "360",
}


def _split_episode_token(token: str) -> tuple[str, str]:
    """把 'hg-episode-v1:<q>:<vid>' 解析为 (清晰度, vid)；兼容旧格式 'hg-episode-v1:<vid>'。

    个别壳会把 '第1集$<token>' 整串传进来，这里顺手剥掉，集 token 解析错位就会
    直接被判成"不是数字"而回落到站点首页，表现就是点哪条线路都播不了。
    """
    body = str(token or "")
    body = body.rsplit("$", 1)[-1]
    body = re.sub(r"^\s*第\s*\d+\s*集\s*", "", body)
    if body.startswith(EPISODE_PREFIX):
        body = body[len(EPISODE_PREFIX):]
    if ":" in body:
        head, tail = body.split(":", 1)
        if head.isdigit():
            return head, tail
    return "1080", body

# 官网搜索 SSR 固定约 10 条且几乎不认 page；用多关键词轮换实现“翻页”
_AI_MANJU_KEYWORDS = [
    "AI漫剧", "AI动画", "AI短剧", "AI动漫", "漫剧AI", "二次元AI", "AI漫画", "动画短剧",
]


# ---- 本机解密缓存 + 自动清理 ----
_HG_CACHE_DIR = None
_HG_CACHE_MAX_FILES = 8          # 最多保留集数
_HG_CACHE_MAX_BYTES = 400 * 1024 * 1024  # 总容量约 400MB
_HG_CACHE_MAX_AGE = 6 * 3600     # 超过 6 小时自动删


def _hg_cache_dir() -> str:
    global _HG_CACHE_DIR
    if _HG_CACHE_DIR and os.path.isdir(_HG_CACHE_DIR):
        return _HG_CACHE_DIR
    candidates = []
    # 优先 App 可写缓存目录（OK影视 / FongMi 常见路径）
    for root in (
        "/data/user/0/com.fongmi.android.oktv/cache",
        "/data/data/com.fongmi.android.oktv/cache",
        "/data/user/0/com.fongmi.android.tv/cache",
        "/data/data/com.fongmi.android.tv/cache",
        "/sdcard/Android/data/com.fongmi.android.oktv/cache",
        "/sdcard/Android/data/com.fongmi.android.tv/cache",
        "/sdcard/Download",
    ):
        candidates.append(os.path.join(root, "hg_cenc_cache"))
    try:
        candidates.append(os.path.join(tempfile.gettempdir(), "hg_cenc_cache"))
    except Exception:
        pass
    try:
        candidates.append(os.path.join(os.getcwd(), "hg_cenc_cache"))
    except Exception:
        pass
    for path in candidates:
        try:
            os.makedirs(path, exist_ok=True)
            test = os.path.join(path, ".w")
            with open(test, "wb") as fh:
                fh.write(b"1")
            os.remove(test)
            _HG_CACHE_DIR = path
            return path
        except Exception:
            continue
    _HG_CACHE_DIR = tempfile.mkdtemp(prefix="hg_cenc_")
    return _HG_CACHE_DIR


def _hg_cache_path(vid: str, quality: str) -> str:
    safe = re.sub(r"[^0-9A-Za-z_-]", "", str(vid))[:40]
    q = re.sub(r"[^0-9A-Za-z]", "", str(quality or "q"))[:8]
    return os.path.join(_hg_cache_dir(), "%s_%s.mp4" % (safe, q))


def _hg_cache_list() -> list:
    root = _hg_cache_dir()
    files = []
    try:
        now = time.time()
        for name in os.listdir(root):
            if not name.endswith(".mp4"):
                continue
            fp = os.path.join(root, name)
            if not os.path.isfile(fp):
                continue
            try:
                st = os.stat(fp)
            except Exception:
                continue
            files.append({"path": fp, "size": st.st_size, "mtime": st.st_mtime, "age": now - st.st_mtime})
    except Exception:
        return []
    files.sort(key=lambda x: x["mtime"])  # 旧 -> 新
    return files


def _hg_cache_cleanup(force: bool = False) -> None:
    """按时间 + 数量 + 体积自动清理本机缓存。"""
    try:
        files = _hg_cache_list()
        if not files and not force:
            return
        # 1) 过期删除
        remain = []
        for item in files:
            if item["age"] > _HG_CACHE_MAX_AGE or item["size"] <= 0:
                try:
                    os.remove(item["path"])
                except Exception:
                    pass
            else:
                remain.append(item)
        # 2) 超量删除最旧
        total = sum(x["size"] for x in remain)
        while remain and (len(remain) > _HG_CACHE_MAX_FILES or total > _HG_CACHE_MAX_BYTES):
            old = remain.pop(0)
            try:
                os.remove(old["path"])
            except Exception:
                pass
            total -= old["size"]
        # 3) 清理残留 tmp
        root = _hg_cache_dir()
        for name in os.listdir(root):
            if name.endswith(".tmp") or name == ".w":
                try:
                    os.remove(os.path.join(root, name))
                except Exception:
                    pass
    except Exception:
        pass


def _hg_cache_clear_all() -> None:
    try:
        root = _hg_cache_dir()
        for name in os.listdir(root):
            fp = os.path.join(root, name)
            try:
                if os.path.isfile(fp):
                    os.remove(fp)
            except Exception:
                pass
    except Exception:
        pass


def _hg_cache_get(vid: str, quality: str) -> bytes | None:
    _hg_cache_cleanup(False)
    path = _hg_cache_path(vid, quality)
    try:
        if os.path.isfile(path) and os.path.getsize(path) > 64:
            # 读时刷新 mtime，避免刚播又被当过期删
            try:
                os.utime(path, None)
            except Exception:
                pass
            with open(path, "rb") as fh:
                return fh.read()
    except Exception:
        return None
    return None


def _hg_cache_put(vid: str, quality: str, data: bytes) -> None:
    if not data or len(data) < 64:
        return
    path = _hg_cache_path(vid, quality)
    try:
        _hg_cache_cleanup(False)
        tmp = path + ".tmp"
        with open(tmp, "wb") as fh:
            fh.write(data)
        os.replace(tmp, path)
        _hg_cache_cleanup(False)
    except Exception:
        try:
            if os.path.exists(path + ".tmp"):
                os.remove(path + ".tmp")
        except Exception:
            pass


def _aes_is_fast() -> bool:
    return AES_BACKEND in ("cryptography", "pycryptodome")


def _http_get_bytes(url: str, headers: dict | None = None, timeout: int = 60) -> bytes:
    h = dict(headers or {})
    r = requests.get(url, headers=h, timeout=timeout)
    r.raise_for_status()
    return r.content


def _probe_content_length(url: str, headers: dict | None = None, timeout: int = 30) -> int:
    h = dict(headers or {})
    try:
        r = requests.head(url, headers=h, timeout=timeout, allow_redirects=True)
        if r.status_code < 400:
            cl = r.headers.get("Content-Length") or r.headers.get("content-length")
            if cl and str(cl).isdigit():
                return int(cl)
    except Exception:
        pass
    try:
        hh = dict(h)
        hh["Range"] = "bytes=0-0"
        r = requests.get(url, headers=hh, timeout=timeout)
        cr = r.headers.get("Content-Range") or r.headers.get("content-range") or ""
        # bytes 0-0/12345
        if "/" in cr:
            total = cr.split("/")[-1].strip()
            if total.isdigit():
                return int(total)
        cl = r.headers.get("Content-Length") or "0"
        if str(cl).isdigit() and int(cl) > 1:
            return int(cl)
    except Exception:
        pass
    return 0


def _download_range(url: str, start: int, end: int, headers: dict | None, timeout: int) -> tuple[int, bytes]:
    h = dict(headers or {})
    h["Range"] = "bytes=%d-%d" % (start, end)
    last_err = None
    for attempt in range(3):
        try:
            r = requests.get(url, headers=h, timeout=timeout)
            if r.status_code not in (200, 206):
                raise RuntimeError("range http %s" % r.status_code)
            data = r.content
            if not data:
                raise RuntimeError("empty range body")
            return start, data
        except Exception as err:
            last_err = err
            try:
                time.sleep(0.25 * (attempt + 1))
            except Exception:
                pass
    raise RuntimeError("range %s-%s failed: %s" % (start, end, last_err))


def _multi_download(url: str, headers: dict | None = None, timeout: int = 90, workers: int = 4) -> bytes:
    """多分片并行下载，失败则回退整文件单线程。"""
    headers = dict(headers or {})
    total = _probe_content_length(url, headers, timeout=min(30, timeout))
    # 太小或未知长度：直接整下
    if total <= 0 or total < 2 * 1024 * 1024:
        return _http_get_bytes(url, headers, timeout=timeout)

    # 分片大小 1~2MB，线程数限制
    workers = max(2, min(int(workers or 4), 6))
    chunk = max(1 * 1024 * 1024, min(2 * 1024 * 1024, total // workers))
    ranges = []
    start = 0
    while start < total:
        end = min(total - 1, start + chunk - 1)
        ranges.append((start, end))
        start = end + 1

    parts: dict[int, bytes] = {}
    try:
        with concurrent.futures.ThreadPoolExecutor(max_workers=workers) as pool:
            futs = [
                pool.submit(_download_range, url, s, e, headers, timeout)
                for s, e in ranges
            ]
            for fut in concurrent.futures.as_completed(futs):
                s, data = fut.result()
                parts[s] = data
    except Exception:
        # 并行失败回退
        return _http_get_bytes(url, headers, timeout=timeout)

    buf = bytearray()
    for s, e in ranges:
        piece = parts.get(s)
        if piece is None:
            return _http_get_bytes(url, headers, timeout=timeout)
        buf.extend(piece)
    if len(buf) < total * 0.95:
        # 明显不完整
        return _http_get_bytes(url, headers, timeout=timeout)
    return bytes(buf)



_MANJU_KEYWORDS = [
    "漫剧", "动漫短剧", "二次元", "漫画短剧", "国漫短剧", "日漫", "动态漫", "动画剧",
]

VIDEO_URL = "https://api5-normal-sinfonlineb.fqnovel.com/novel/player/multi_video_model/v1/"
UA = "Mozilla/5.0 (Linux; Android 12) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/126.0 Safari/537.36"
APP_UA = "com.phoenix.read/71332 (Linux; U; Android 16; zh_CN; 25053RT47C; Build/BP2A.250605.031.A3; Cronet/TTNetVersion:04657795 2026-01-23 QuicVersion:c67e9834 2025-09-08)"
MEDIA_UA = "com.phoenix.read/71332"




_HTML_FETCH_ATTEMPTS = 3

_HTML_FETCH_BACKOFF_SECONDS = 1.5

# CDN 偶发 503（节点过载）比较常见，重试次数给到 4 次并拉长退避；
# 正常情况第一次就命中，不会多等。
_RANGE_FETCH_ATTEMPTS = 4

_RANGE_FETCH_BACKOFF_SECONDS = 0.8

_RANGE_FETCH_BACKOFF_STEPS = (0.6, 1.4, 2.6)

class HongguoPluginError(RuntimeError):
    pass

def _text(value: Any) -> str:
    return str(value or "").strip()

def _first(*values: Any) -> str:
    for value in values:
        if isinstance(value, (list, tuple)):
            result = _first(*value)
        elif isinstance(value, Mapping):
            result = _first(
                value.get("url"),
                value.get("uri"),
                value.get("src"),
                value.get("download_url"),
                value.get("main_url"),
                value.get("backup_url"),
                value.get("backup_url_1"),
                value.get("play_addr"),
                value.get("url_list"),
            )
        else:
            result = _text(value)
        if result:
            return result
    return ""

def _json_response(response: requests.Response) -> Any:
    response.raise_for_status()
    try:
        return response.json()
    except ValueError as exc:
        raise HongguoPluginError("上游响应不是 JSON") from exc

def _get_html(url: str, *, attempts: int = _HTML_FETCH_ATTEMPTS) -> str:
    last_error: Exception | None = None
    for attempt in range(max(1, attempts)):
        try:
            response = requests.get(
                url,
                headers={
                    "User-Agent": UA,
                    "Accept-Language": "zh-CN,zh;q=0.9",
                },
                timeout=30,
            )
            response.raise_for_status()
            response.encoding = response.encoding or "utf-8"
            return response.text
        except Exception as error:  # transient proxy/DNS/read failures
            last_error = error
            if attempt + 1 < max(1, attempts):
                time.sleep(_HTML_FETCH_BACKOFF_SECONDS * (attempt + 1))
    raise HongguoPluginError(f"fetch failed: {url}") from last_error

def _router_data(html: str) -> dict[str, Any]:
    match = re.search(r"(?:window\.)?_ROUTER_DATA\s*=\s*", html)
    if not match:
        raise HongguoPluginError("页面没有路由数据")
    try:
        value, _ = json.JSONDecoder().raw_decode(html[match.end() :])
    except json.JSONDecodeError as exc:
        raise HongguoPluginError("页面路由数据解析失败") from exc
    if not isinstance(value, dict):
        raise HongguoPluginError("页面路由数据格式错误")
    return value

def _media_url(item: Mapping[str, Any]) -> str:
    return _first(
        item.get("main_url"),
        item.get("backup_url"),
        item.get("backup_url_1"),
        item.get("play_addr"),
        item.get("url"),
    )

def _spade_value(item: Mapping[str, Any]) -> str:
    encrypt_info = item.get("encrypt_info")
    if not isinstance(encrypt_info, Mapping):
        encrypt_info = {}
    return _first(item.get("spade_a"), encrypt_info.get("spade_a"))

def derive_content_key(spade_b64: str) -> bytes:
    raw = _b64(spade_b64)
    if len(raw) < 3:
        raise HongguoPluginError("spade_a 太短")
    v8 = len(raw) - (raw[0] ^ raw[1] ^ raw[2]) + 47
    if v8 <= 0 or 1 + v8 > len(raw):
        v8 = len(raw) - 1
    if v8 < 33:
        raise HongguoPluginError("spade_a 长度异常")
    value = bytearray(raw[1 : 1 + v8])
    va, vb = 85, 246
    for index in range(v8):
        previous = va if index & 1 else vb
        if index & 1:
            va = value[index]
        else:
            vb = value[index]
        value[index] = (-21 - bin(index).count("1") + (previous ^ value[index])) & 0xFF
    try:
        return binascii.unhexlify(bytes(value[1:33]).decode("ascii"))
    except (ValueError, binascii.Error) as exc:
        raise HongguoPluginError("spade_a 密钥材料无效") from exc

def _find_box(data: memoryview, fourcc: bytes, start: int) -> tuple[int, int]:
    for index in range(max(4, start), len(data) - 4):
        if data[index : index + 4] != fourcc:
            continue
        size = struct.unpack(">I", data[index - 4 : index])[0]
        if size == 1 and index + 12 <= len(data):
            size = struct.unpack(">Q", data[index + 4 : index + 12])[0]
        if 8 <= size <= 5_000_000 and index - 4 + size <= len(data):
            return index - 4, size
    return -1, 0

def _box_body(data: memoryview, fourcc: bytes, start: int) -> memoryview | None:
    offset, size = _find_box(data, fourcc, start)
    return data[offset + 8 : offset + size] if offset >= 0 else None

def _parse_track(
    moov: memoryview,
    track_offset: int,
) -> tuple[list[int], list[int], list[int], list[int], int, int] | None:
    if track_offset < 0:
        return None
    stbl_offset, _ = _find_box(moov, b"stbl", track_offset + 8)
    if stbl_offset < 0:
        return None
    stsz = _box_body(moov, b"stsz", stbl_offset)
    stco = _box_body(moov, b"stco", stbl_offset)
    co64 = _box_body(moov, b"co64", stbl_offset)
    stsc = _box_body(moov, b"stsc", stbl_offset)
    saiz = _box_body(moov, b"saiz", stbl_offset)
    saio = _box_body(moov, b"saio", stbl_offset)
    if any(value is None for value in (stsz, stsc, saiz, saio)) or (
        stco is None and co64 is None
    ):
        return None
    assert stsz is not None and stsc is not None
    assert saiz is not None and saio is not None
    default_size = struct.unpack(">I", stsz[4:8])[0]
    sample_count = struct.unpack(">I", stsz[8:12])[0]
    sizes = (
        [default_size] * sample_count
        if default_size
        else [
            struct.unpack(">I", stsz[12 + index * 4 : 16 + index * 4])[0]
            for index in range(sample_count)
        ]
    )
    chunk_table = stco if stco is not None else co64
    assert chunk_table is not None
    chunk_count = struct.unpack(">I", chunk_table[4:8])[0]
    chunk_width = 4 if stco is not None else 8
    offsets = [
        int.from_bytes(
            chunk_table[
                8 + index * chunk_width : 8 + (index + 1) * chunk_width
            ],
            "big",
        )
        for index in range(chunk_count)
    ]
    entry_count = struct.unpack(">I", stsc[4:8])[0]
    entries = [
        (
            struct.unpack(">I", stsc[8 + index * 12 : 12 + index * 12])[0],
            struct.unpack(">I", stsc[12 + index * 12 : 16 + index * 12])[0],
        )
        for index in range(entry_count)
    ]
    chunk_samples = [0] * chunk_count
    for index, (first_chunk, samples_per_chunk) in enumerate(entries):
        end = entries[index + 1][0] - 1 if index + 1 < len(entries) else chunk_count
        for chunk in range(first_chunk - 1, min(end, chunk_count)):
            chunk_samples[chunk] = samples_per_chunk
    saiz_flags = int.from_bytes(saiz[1:4], "big")
    saiz_cursor = 12 if saiz_flags & 1 else 4
    if len(saiz) < saiz_cursor + 5:
        return None
    default_aux_size = saiz[saiz_cursor]
    aux_count = struct.unpack(">I", saiz[saiz_cursor + 1 : saiz_cursor + 5])[0]
    aux_sizes = (
        [default_aux_size] * aux_count
        if default_aux_size
        else [
            int(saiz[saiz_cursor + 5 + index])
            for index in range(aux_count)
            if saiz_cursor + 5 + index < len(saiz)
        ]
    )
    if len(aux_sizes) != aux_count:
        return None
    saio_flags = int.from_bytes(saio[1:4], "big")
    saio_cursor = 12 if saio_flags & 1 else 4
    offset_width = 8 if saio[0] == 1 else 4
    if len(saio) < saio_cursor + 4 + offset_width:
        return None
    entry_count = int.from_bytes(saio[saio_cursor : saio_cursor + 4], "big")
    if entry_count < 1:
        return None
    aux_offset = int.from_bytes(
        saio[saio_cursor + 4 : saio_cursor + 4 + offset_width],
        "big",
    )
    return sizes, offsets, chunk_samples, aux_sizes, aux_offset, sample_count

def _replace_fourcc(data: bytearray, old: bytes, new: bytes) -> None:
    position = 0
    while True:
        position = data.find(old, position)
        if position < 0:
            return
        data[position : position + len(old)] = new
        position += len(new)

def _replace_sinf(data: bytearray) -> None:
    position = 0
    while True:
        position = data.find(b"sinf", position)
        if position < 0:
            return
        if position >= 4:
            size = struct.unpack(">I", data[position - 4 : position])[0]
            end = position - 4 + size
            if 8 <= size < 50_000 and end <= len(data):
                data[position : position + 4] = b"free"
                data[position + 4 : end] = b"\x00" * max(0, end - position - 4)
                position = end
                continue
        position += 4

def decrypt_mp4_cenc(data: bytes, content_key: bytes) -> bytes:
    if len(content_key) != 16:
        raise HongguoPluginError("CENC 密钥长度错误")
    result = bytearray(data)
    if len(result) < 16:
        raise HongguoPluginError("MP4 数据过短")
    moov_start, moov_size = _find_box(memoryview(result), b"moov", 0)
    if moov_start < 0 or moov_size < 8:
        raise HongguoPluginError("MP4 moov 越界")
    moov = memoryview(result)[moov_start : moov_start + moov_size]
    tracks: list[int] = []
    track_search = 0
    while True:
        track, track_size = _find_box(moov, b"trak", track_search)
        if track < 0:
            break
        tracks.append(track)
        track_search = track + max(track_size, 8)
    decrypted_samples = 0
    for track in tracks:
        parsed = _parse_track(moov, track)
        if parsed is None:
            continue
        sizes, offsets, chunk_counts, aux_sizes, aux_offset, sample_count = parsed
        aux_size = sum(max(size, 8) for size in aux_sizes)
        if not sample_count or aux_offset < 0 or aux_offset + aux_size > len(result):
            continue
        aux = result[aux_offset : aux_offset + aux_size]
        sample_index = 0
        aux_index = 0
        for chunk_index, chunk_offset in enumerate(offsets):
            current = chunk_offset
            for _ in range(chunk_counts[chunk_index]):
                if sample_index >= sample_count or sample_index >= len(sizes):
                    break
                size = sizes[sample_index]
                if current + size > len(result):
                    raise HongguoPluginError("MP4 样本越界")
                if sample_index >= len(aux_sizes):
                    raise HongguoPluginError("MP4 辅助信息数量不足")
                entry_size = max(aux_sizes[sample_index], 8)
                iv = bytes(aux[aux_index : aux_index + min(entry_size, 8)]).ljust(
                    8, b"\0"
                ) + b"\0" * 8
                result[current : current + size] = _aes_ctr_decrypt(
                    content_key, iv, bytes(result[current : current + size])
                )
                current += size
                sample_index += 1
                aux_index += entry_size
                decrypted_samples += 1
    if not decrypted_samples:
        raise HongguoPluginError("MP4 没有可解密的 CENC 样本")
    moov_buffer = bytearray(result[moov_start : moov_start + moov_size])
    _restore_cenc_codecs(moov_buffer)
    _replace_sinf(moov_buffer)
    result[moov_start : moov_start + moov_size] = moov_buffer
    return bytes(result)

MEDIA_HEADERS = {"User-Agent": MEDIA_UA, "Referer": "https://novel.snssdk.com/"}

_STREAM_PORT_RANGE = (9990, 10000)
# 分片调小 + 预取几片，播放器能更快拿到首字节、也不会在片与片之间等 CDN 往返。
_STREAM_CHUNK = 512 * 1024
_STREAM_PREFETCH = 6
_STREAM_HEAD_PROBE = 1 << 16
_STREAM_TTL_SECONDS = 900
_STREAM_MAX_SESSIONS = 8
_STREAM_STATE: dict[str, Any] = {"port": 0, "server": None, "sessions": {}}
_STREAM_LOCK = threading.RLock()

# 媒体 Range 复用一条长连接：原来每 512KB/1MB 都新建一次 TCP+TLS，
# 一集 24MB 就是二十多次握手，首字节和吞吐都被握手吃掉。
_MEDIA_SESSION: Any = None
# 默认优先本机 Range 流：起播 0.5s 级，内存占用也只有整集方案的零头。
# 壳里 python 与播放器不同网络栈时，用 init({"stream":0}) 关掉即可。
_PREFER_STREAM = True


def _media_session() -> Any:
    global _MEDIA_SESSION
    with _STREAM_LOCK:
        if _MEDIA_SESSION is None:
            session = requests.Session()
            try:
                adapter = requests.adapters.HTTPAdapter(
                    pool_connections=4, pool_maxsize=16, max_retries=0
                )
                session.mount("https://", adapter)
                session.mount("http://", adapter)
            except Exception:
                pass
            _MEDIA_SESSION = session
        return _MEDIA_SESSION


def _toplevel_boxes(buf: bytes) -> list[tuple[int, int, bytes]]:
    boxes: list[tuple[int, int, bytes]] = []
    cursor = 0
    while cursor + 8 <= len(buf):
        size = struct.unpack(">I", buf[cursor : cursor + 4])[0]
        fourcc = bytes(buf[cursor + 4 : cursor + 8])
        if size == 1:
            if cursor + 16 > len(buf):
                break
            size = struct.unpack(">Q", buf[cursor + 8 : cursor + 16])[0]
        if size < 8:
            break
        boxes.append((cursor, size, fourcc))
        cursor += size
    return boxes


def _range_get(url: str, start: int, end: int) -> tuple[bytes, int]:
    headers = dict(MEDIA_HEADERS)
    headers["Range"] = "bytes=%d-%d" % (start, end)
    expected = end - start + 1
    last_error: Exception | None = None
    for attempt in range(_RANGE_FETCH_ATTEMPTS):
        if attempt:
            index = min(attempt - 1, len(_RANGE_FETCH_BACKOFF_STEPS) - 1)
            time.sleep(_RANGE_FETCH_BACKOFF_STEPS[index])
        try:
            response = _media_session().get(url, headers=headers, timeout=60)
        except Exception as error:
            last_error = error
            continue
        if response.status_code not in (200, 206):
            last_error = HongguoPluginError(
                "媒体分片请求失败 %s" % response.status_code
            )
            continue
        body = response.content
        # 上游偶发返回短包；短于请求长度时重试，避免播放器收到截断数据。
        if not body or (response.status_code == 206 and len(body) < expected):
            last_error = HongguoPluginError(
                "媒体分片长度不足 %d/%d" % (len(body), expected)
            )
            continue
        total = 0
        content_range = response.headers.get("Content-Range") or ""
        if "/" in content_range:
            tail = content_range.rsplit("/", 1)[1].strip()
            if tail.isdigit():
                total = int(tail)
        if not total:
            length = response.headers.get("Content-Length") or ""
            total = int(length) if length.isdigit() else 0
        return body, total
    raise last_error or HongguoPluginError("媒体分片请求失败")


def _fetch_moov(url: str) -> tuple[int, int, bytes]:
    probe, total = _range_get(url, 0, _STREAM_HEAD_PROBE - 1)
    if not total:
        raise HongguoPluginError("媒体总长度未知")
    moov_start = 0
    moov_size = 0
    for offset, size, fourcc in _toplevel_boxes(probe):
        if fourcc == b"moov":
            moov_start = offset
            moov_size = size
            break
    if not moov_size:
        raise HongguoPluginError("未找到 moov 顶层盒")
    if moov_start + moov_size > total:
        raise HongguoPluginError("moov 越界")
    if moov_start + moov_size <= len(probe):
        return total, moov_start, bytes(probe[moov_start : moov_start + moov_size])
    moov, _ = _range_get(url, moov_start, moov_start + moov_size - 1)
    if len(moov) != moov_size:
        raise HongguoPluginError("moov 分片长度不符")
    return total, moov_start, moov


def _original_format_near(data: bytearray, entry_pos: int, default: bytes) -> bytes:
    """从 sample entry 后的 sinf/frma 读取原始四字符码（avc1/hvc1/mp4a 等）。"""
    blob = bytes(data[entry_pos : min(len(data), entry_pos + 800)])
    idx = 0
    while True:
        pos = blob.find(b"frma", idx)
        if pos < 0:
            return default
        if pos + 8 <= len(blob):
            fmt = bytes(blob[pos + 4 : pos + 8])
            if fmt not in (b"", b"\x00\x00\x00\x00", b"encv", b"enca") and all(32 <= c < 127 for c in fmt):
                return fmt
        idx = pos + 4


def _restore_cenc_codecs(data: bytearray) -> None:
    """把 encv/enca 还原为 frma 中的真实编码，避免一律改成 hvc1 导致只有声音。"""
    pos = 0
    while True:
        pos = data.find(b"encv", pos)
        if pos < 0:
            break
        data[pos : pos + 4] = _original_format_near(data, pos, b"avc1")
        pos += 4
    pos = 0
    while True:
        pos = data.find(b"enca", pos)
        if pos < 0:
            break
        data[pos : pos + 4] = _original_format_near(data, pos, b"mp4a")
        pos += 4


def _rewrite_moov(moov: bytes) -> bytes:
    result = bytearray(moov)
    _restore_cenc_codecs(result)
    _replace_sinf(result)
    return bytes(result)


def _sample_table(moov: bytes, moov_start: int) -> list[tuple[int, int, bytes]]:
    view = memoryview(moov)
    samples: list[tuple[int, int, bytes]] = []
    track_search = 0
    while True:
        track, track_size = _find_box(view, b"trak", track_search)
        if track < 0:
            break
        track_search = track + max(track_size, 8)
        parsed = _parse_track(view, track)
        if parsed is None:
            continue
        sizes, offsets, chunk_counts, aux_sizes, aux_offset, sample_count = parsed
        aux_length = sum(max(size, 8) for size in aux_sizes)
        aux_local = aux_offset - moov_start
        if aux_local < 0 or aux_local + aux_length > len(moov):
            raise HongguoPluginError("CENC 辅助信息不在 moov 内，无法流式解密")
        aux = moov[aux_local : aux_local + aux_length]
        sample_index = 0
        aux_index = 0
        for chunk_index, chunk_offset in enumerate(offsets):
            current = chunk_offset
            for _ in range(chunk_counts[chunk_index]):
                if sample_index >= sample_count or sample_index >= len(sizes):
                    break
                if sample_index >= len(aux_sizes):
                    raise HongguoPluginError("CENC 辅助信息数量不足")
                entry_size = max(aux_sizes[sample_index], 8)
                initial_vector = bytes(
                    aux[aux_index : aux_index + min(entry_size, 8)]
                ).ljust(8, b"\0") + b"\0" * 8
                samples.append((current, sizes[sample_index], initial_vector))
                current += sizes[sample_index]
                aux_index += entry_size
                sample_index += 1
    if not samples:
        raise HongguoPluginError("moov 中没有可解密的 CENC 样本")
    samples.sort()
    return samples


class _StreamSession:
    """按 Range 逐块拉取加密 MP4，边下边解 CENC，供本地播放器直连。"""

    def __init__(
        self,
        url: str,
        content_key: bytes,
        total: int,
        moov_start: int,
        moov: bytes,
        definition: str = "",
    ) -> None:
        if len(content_key) != 16:
            raise HongguoPluginError("CENC 密钥长度错误")
        self.url = url
        self.content_key = content_key
        self.total = total
        self.moov_start = moov_start
        self.moov_plain = _rewrite_moov(moov)
        self.moov_end = moov_start + len(moov)
        self.samples = _sample_table(moov, moov_start)
        self.offsets = [item[0] for item in self.samples]
        self.definition = definition
        self.created = time.time()
        self.used = self.created

    def touch(self) -> None:
        self.used = time.time()

    def expired(self) -> bool:
        return time.time() - self.created > _STREAM_TTL_SECONDS

    def _patch(self, buffer: bytearray, base: int) -> None:
        end = base + len(buffer) - 1
        index = max(bisect.bisect_right(self.offsets, base) - 1, 0)
        while index < len(self.samples):
            offset, size, initial_vector = self.samples[index]
            index += 1
            if offset > end:
                break
            if offset + size <= base:
                continue
            first = max(offset, base)
            last = min(offset + size - 1, end)
            skip = first - offset
            counter = (
                (int.from_bytes(initial_vector, "big") + skip // 16)
                & ((1 << 128) - 1)
            ).to_bytes(16, "big")
            padding = skip % 16
            plain = _aes_ctr_decrypt(
                self.content_key,
                counter,
                b"\0" * padding + bytes(buffer[first - base : last - base + 1]),
            )
            buffer[first - base : last - base + 1] = plain[padding:]
        if base < self.moov_end and end >= self.moov_start:
            first = max(base, self.moov_start)
            last = min(end, self.moov_end - 1)
            buffer[first - base : last - base + 1] = self.moov_plain[
                first - self.moov_start : last - self.moov_start + 1
            ]

    def read_range(self, start: int, end: int) -> bytes:
        self.touch()
        raw, _ = _range_get(self.url, start, end)
        if not raw:
            raise HongguoPluginError("媒体分片为空")
        buffer = bytearray(raw)
        self._patch(buffer, start)
        return bytes(buffer)

    def _blocks(self, start: int, end: int):
        cursor = start
        while cursor <= end:
            stop = min(cursor + _STREAM_CHUNK - 1, end)
            block = self.read_range(cursor, stop)
            if not block:
                break
            yield block
            cursor += len(block)

    def iter_range(self, start: int, end: int, prefetch: int = _STREAM_PREFETCH):
        """边下边解密，并用一条生产者线程预取后续分片，避免播放器在片边界空等。"""
        if prefetch <= 1:
            yield from self._blocks(start, end)
            return
        pending: queue.Queue = queue.Queue(maxsize=prefetch)
        stop = threading.Event()

        def produce() -> None:
            try:
                for block in self._blocks(start, end):
                    if stop.is_set():
                        return
                    pending.put(block)
            except Exception as error:  # 交给消费者原样抛出
                pending.put(error)
            finally:
                pending.put(None)

        worker = threading.Thread(target=produce, daemon=True)
        worker.start()
        try:
            while True:
                item = pending.get()
                if item is None:
                    return
                if isinstance(item, Exception):
                    raise item
                yield item
        finally:
            stop.set()


_DECODABLE_TAGS = (b"avc1", b"avc3", b"hvc1", b"hev1", b"dvh1", b"dvhe", b"av01", b"vp09")


def _moov_decodable(moov: bytes) -> bool:
    """moov 里是否至少有一条标准编码的视频轨。"""
    if not moov:
        return False
    blob = bytes(moov)
    video_at = blob.find(b"vide")
    if video_at >= 0:
        window = blob[video_at : video_at + 4096]
        return any(tag in window for tag in _DECODABLE_TAGS)
    return any(blob.find(tag) >= 0 for tag in _DECODABLE_TAGS)


def _resolve_stream_item(video_id: str, model: Mapping[str, Any], quality: str):
    """按可解码性选档，并用 frma 复核一次真实 fourcc，避免把黑屏线路喂给播放器。"""
    rows = _quality_rows(_video_list_from_model(model))
    playable = _playable_qualities(rows)
    order = [quality] + [q for q in _QUALITY_ORDER if q != quality]
    candidates = [q for q in order if q in playable] or list(playable) or list(rows)
    last_error: Exception | None = None
    for definition in candidates:
        item = rows.get(definition)
        if not item:
            continue
        url = _media_url(item)
        spade = _spade_value(item)
        if not url or not spade:
            last_error = HongguoPluginError("播放模型缺少地址或密钥材料")
            continue
        key_seed = _key_seed_from_model(model)
        if key_seed:
            try:
                url = _decrypt_spade_url(url, key_seed)
            except HongguoPluginError:
                pass
        try:
            total, moov_start, moov = _fetch_moov(url)
        except Exception as error:
            last_error = error
            continue
        if not _moov_decodable(moov):
            last_error = HongguoPluginError("清晰度 %s 的码流无法解码" % definition)
            continue
        return definition, url, spade, total, moov_start, moov
    raise last_error or HongguoPluginError("没有可用清晰度")


def _stream_session(video_id: str, config: Mapping[str, Any], quality: str = "1080") -> "_StreamSession":
    quality = quality if quality in _QUALITY_LINE_NAME_TO_Q else "1080"
    cache_key = "%s|%s" % (video_id, quality)
    with _STREAM_LOCK:
        sessions = _STREAM_STATE["sessions"]
        for key in [key for key, item in sessions.items() if item.expired()]:
            sessions.pop(key, None)
        session = sessions.get(cache_key)
        if session is not None:
            session.touch()
            return session
    model = _video_model(video_id, config)
    definition, url, spade, total, moov_start, moov = _resolve_stream_item(
        video_id, model, quality
    )
    session = _StreamSession(
        url, derive_content_key(spade), total, moov_start, moov, definition
    )
    with _STREAM_LOCK:
        sessions = _STREAM_STATE["sessions"]
        # 按最近使用淘汰，别把正在播的那一集踢掉（原来只有 4 个槽，切线路就断）。
        while len(sessions) >= _STREAM_MAX_SESSIONS:
            oldest = min(sessions, key=lambda key: getattr(sessions[key], "used", 0))
            sessions.pop(oldest, None)
        sessions[cache_key] = session
        session.touch()
    return session


_RANGE_UNSATISFIABLE = "unsatisfiable"

def _parse_range(value: str, total: int) -> Any:
    """解析 Range 头。返回 (start, end)、None（忽略）或 _RANGE_UNSATISFIABLE。"""
    text = (value or "").strip().lower()
    if not text.startswith("bytes="):
        return None
    spec = text[6:].split(",")[0].strip()
    if "-" not in spec:
        return None
    left, right = spec.split("-", 1)
    if not left:
        if not right.isdigit():
            return None
        length = min(int(right), total)
        if not length:
            return _RANGE_UNSATISFIABLE
        return total - length, total - 1
    if not left.isdigit():
        return None
    start = int(left)
    end = int(right) if right.isdigit() else total - 1
    end = min(end, total - 1)
    if start >= total or start > end:
        return _RANGE_UNSATISFIABLE
    return start, end


class _StreamHandler(BaseHTTPRequestHandler):
    protocol_version = "HTTP/1.1"
    server_version = "hg-stream"

    def log_message(self, *args: Any) -> None:
        return None

    def _params(self) -> dict[str, str]:
        parsed = urlparse(self.path)
        query = parse_qs(parsed.query)
        video_id = (query.get("vid") or query.get("id") or [""])[0]
        if not video_id:
            video_id = parsed.path.rsplit("/", 1)[-1].split(".")[0]
        return {
            "vid": video_id if video_id.isdigit() else "",
            "quality": (query.get("q") or ["1080"])[0],
            "device_id": (query.get("did") or [""])[0],
            "install_id": (query.get("iid") or [""])[0],
        }

    def _fail(self, code: int, message: bytes) -> None:
        self.send_response(code)
        self.send_header("Content-Type", "text/plain; charset=utf-8")
        self.send_header("Content-Length", str(len(message)))
        self.send_header("Connection", "close")
        self.end_headers()
        try:
            self.wfile.write(message)
        except OSError:
            pass

    def do_HEAD(self) -> None:  # noqa: N802 - 标准库回调命名
        self._serve(body=False)

    def do_GET(self) -> None:  # noqa: N802 - 标准库回调命名
        self._serve(body=True)

    def _serve(self, body: bool) -> None:
        route = urlparse(self.path).path
        if not route.endswith(".mp4"):
            self._fail(404, b"not found")
            return
        params = self._params()
        if not params["vid"]:
            self._fail(400, b"missing vid")
            return
        try:
            session = _stream_session(
                params["vid"],
                {
                    "device_id": params["device_id"],
                    "install_id": params["install_id"],
                },
                params["quality"],
            )
        except Exception:
            self._fail(502, b"media session failed")
            return
        raw_range = self.headers.get("Range") or ""
        requested = _parse_range(raw_range, session.total)
        if requested is _RANGE_UNSATISFIABLE:
            self.send_response(416)
            self.send_header("Content-Type", "text/plain; charset=utf-8")
            self.send_header("Content-Range", "bytes */%d" % session.total)
            self.send_header("Content-Length", "0")
            self.send_header("Connection", "close")
            self.end_headers()
            return
        start, end = requested if requested else (0, session.total - 1)
        self.send_response(206 if requested else 200)
        self.send_header("Content-Type", "video/mp4")
        self.send_header("Accept-Ranges", "bytes")
        self.send_header("Content-Length", str(end - start + 1))
        if requested:
            self.send_header(
                "Content-Range",
                "bytes %d-%d/%d" % (start, end, session.total),
            )
        self.end_headers()
        if not body:
            return
        try:
            for block in session.iter_range(start, end):
                self.wfile.write(block)
        except (BrokenPipeError, ConnectionResetError):
            self.close_connection = True
        except Exception:
            self.close_connection = True


def _start_stream_server() -> int:
    with _STREAM_LOCK:
        port = _STREAM_STATE["port"]
        server = _STREAM_STATE["server"]
        if port and server is not None:
            # 端口记着不代表服务还活着（源被重建/线程被杀），真探一下再复用。
            try:
                import socket as _socket

                probe = _socket.create_connection(("127.0.0.1", int(port)), timeout=1)
                probe.close()
                return int(port)
            except Exception:
                _STREAM_STATE["port"] = 0
                _STREAM_STATE["server"] = None
        for port in range(_STREAM_PORT_RANGE[0], _STREAM_PORT_RANGE[1]):
            try:
                server = ThreadingHTTPServer(("127.0.0.1", port), _StreamHandler)
            except OSError:
                continue
            server.daemon_threads = True
            threading.Thread(target=server.serve_forever, daemon=True).start()
            _STREAM_STATE["port"] = port
            _STREAM_STATE["server"] = server
            return port
    return 0

def _b64(value: str) -> bytes:
    text = _text(value)
    text += "=" * (-len(text) % 4)
    try:
        return base64.b64decode(text)
    except (ValueError, binascii.Error):
        return base64.urlsafe_b64decode(text)

def _branch_one_bytes() -> bytes:
    if not hasattr(_branch_one_bytes, "value"):
        _branch_one_bytes.value = lzma.decompress(base64.b85decode(_BRANCH_ONE_B85))
    return _branch_one_bytes.value

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    '?nj+K0JC~Q%IXP|H{#yDjEdD_OTQy%PW`SW>1Qb(^-=#NzqEM#u)~0?+Ct1l*5V2FdPum!p1`@lAG+7#{~kX;zupd8`6SUmQJGIu'
    'TvGglaZc>E<vop;c@ae~1ep<PU_b1v0xRUTjNof3q9=A6k=gnx__b+ek)eA+3XaBNaR?s;&u<gOicmYAl&AFfn8CfxzIs306hs%)'
    '>EV>MOwqBC=PaE#4y~KGF0l6-xyZY2qyl|4H3$X$#L0?8hIKSo0XM+&H^NvAHCH|61jPert6L`bScpN-7mR<YsY!2iFEEZQ8oO%@'
    'AmgSNI3l?eY>&W2a&GDV*<QFXM#q(QocGKV{PV~=;lw1UX@aT;MKgG6GD$3?syFaIf`7TrNL{(9F%Wt`tQQo@?4*6L1r7^kYbO$f'
    'PmHCf1kE!Bls5@sL#Mn*(oF7SvXNBgL92j`f~qC(asnBbbTn{qMA}?%{+^{q@i5RCBW4==95|}!0rGTGZrSUGixOoMF(2&DqX#Pi'
    'xhlwHw#~&k=j^-25j5J`P{jYX)XSu<C$Qu=lVnB!)y0wf?^|^Fa<59kbhllQ#c0ZMX>>CPQyOH+6??L@58nb>k)i9YJy5wKI|#lS'
    'zxNZ<JqMmo2YPq#kA2|#!5zq4_}^go#?Q&3-Ir*5ILMxyBTQ8Xz8<wm0Z5m!W5ylM(Z%zGMQ^_5O<x$VWME2xZSKq|?BMc+K&w1u'
    '_VFYt$oWOdYau!%ifqN_Hkf9`9|Z~RjSjZJ1GA!D9Z)eDSy|Y58ddswujnPwil-7udW&7cJpR&2efTh8;)|esHIF&myHfr9{j<Fh'
    '8>avmxdOqTpF|p2nSkmtc|}0Nk46Uh52l+smE7chTSUvKcM4!O^?W_*y$SkGKrSiT9kjVrooHgS9o=dnZ7?YdMC}~Qo~%IrqUs9>'
    'r9BL2qF!+McN*WLKrM#o1YDjUc;+FPLhPFHpe|D`SLF{M(w4L7M5chrY=pY5AvOBxdG2qxwRqHjy5bu<o63dEyyXLyZIm?MKg4GW'
    '%<CMSN;9vJ*Py-86CH4@Y-ca;qvh?F5n3JF@yxwUv+wLUOTM%60vt~UIS^CeE6v<k?Gf9e=OM)OzT0-Vl!^kPOh$xv&n~i4a}rY{'
    'Wm<6;5VmmN^P49w+E*2VZclJIRH!=I#25&>@Hgh5xYrxBUmLfKA;6$F#5ivS<DNIk(KqW7#q_D@#w@NBELN94qfGdd;H`JbGol%Q'
    'JHS2CqIcqN%sb=a$<nQ0nARB$-39t=Rx?(MZvxL8k^tgi;hP>v0DX9`5L~m7(W6fPN!Xc@<sA3{94@nm!FV0}W~Bp)3Q2tf8goJ<'
    'VV>@-sj<3q#-9yH6Ai3xB6LY|SJ&PEj8D%f<imE*)xS)1>iT~g9t+0&tQKz3Kkc3ip({!+;n}cDRORSRP=^Wv6fg++%Sh4Im5J?@'
    '(wjA<4ww&Qvlyo^x;@~S4ac~JpGw>kCwZ$f%Tw8<#=IGB#3g-Cjn8J)eb}THlI?H-7z2KIM9k}Q7@_h~&)$r*bgYBUQLu)C?_o@s'
    '?@hLOg??iWcUG+Enkwaks4{FmS85-=(}FivKOTqt_ZUTOE}P~7*84uI-)rY4W}^=#`$eaaK8|G=pqf%gJ8Wd*u*vdo4hXn^f6Ww_'
    'l2oM&OO!(iChuI!fKH+br*Je>aO^t^O_FQwz^A5<jiR-1W?f=Yu-Knjh7%mvZghQMX5Y(#+Jgrj8d%U-CbTae#>lKXAv#SE9HRnB'
    'M^ckrWl8*Z-hO)tP4tA&jP%`81PDws$WXkaoUnj%Lw;CL{l?`=%5cz2gLXJsF{nZq4U7efkFc|doQ7NY<X+2)9l9J2C^j?Xq}Goi'
    '{gaB~<`Y(=Y%LSN#YFtd12ikPTUynJLZ~d!{k{CWOwBFLyqz{$5{nXP{>ZHYy85!{;dwayE|3p~cRb0xEtubuNsukY_b%P6|Nd#Q'
    '06IwEki9HP@B?(AzT4z&UDjs&o{12$+AfB$6bQtzhC<F-Dg2~L$W8<f4(CM6$IG^NL1H%fiFTPXRml9BHQh3e>Utt<HCnJ8P);})'
    '-62iJZDxHJkx<Jd1f_TpGP0y?r|C>BGb&PuBz3t5Fov*%$HxdZ!pu`+>%KM+B!s;`2GRB8Odd`+12JNKPT1wsnHJAB%>uD>QkHQ5'
    'm%wk;abUhChCRa|>?*Jih_y7nbAHXu`bYSwbudSWd_(prR7Of}AX)h<!RBEey_f8yb?U=z)pogKZD=J~nPeDblT+tNWawVMk^lez'
    '_lN0;xhM^(00FCl1dxCQVU;jKvBYQl0ssI200dcD'
)

class SM3:
    def __init__(self, data=b""):
        if isinstance(data, str):
            data = data.encode("utf-8")
        self._data = bytearray(data)

    def update(self, data):
        self._data.extend(data)

    def digest(self):
        # Chaquopy/FongMi 环境未必带 cryptography；保留纯 Python SM3 回退。
        if hashes is not None and hasattr(hashes, "SM3"):
            digest = hashes.Hash(hashes.SM3())
            digest.update(bytes(self._data))
            return digest.finalize()
        data = bytes(self._data)
        bit_len = len(data) * 8
        data += b"\x80"
        data += b"\x00" * ((56 - len(data) % 64) % 64)
        data += bit_len.to_bytes(8, "big")
        iv = [0x7380166F, 0x4914B2B9, 0x172442D7, 0xDA8A0600,
              0xA96F30BC, 0x163138AA, 0xE38DEE4D, 0xB0FB0E4E]
        def rol32(v, n):
            return ((v << n) | (v >> (32 - n))) & 0xFFFFFFFF
        for off in range(0, len(data), 64):
            block = data[off:off + 64]
            w = [int.from_bytes(block[i:i + 4], "big") for i in range(0, 64, 4)]
            for j in range(16, 68):
                x = w[j - 16] ^ w[j - 9] ^ rol32(w[j - 3], 15)
                w.append((x ^ rol32(x, 15) ^ rol32(x, 23) ^ rol32(w[j - 13], 7) ^ w[j - 6]) & 0xFFFFFFFF)
            w1 = [w[j] ^ w[j + 4] for j in range(64)]
            a, b, c, d, e, f, g, h = iv
            for j in range(64):
                tj = 0x79CC4519 if j < 16 else 0x7A879D8A
                ss1 = rol32((rol32(a, 12) + e + rol32(tj, j % 32)) & 0xFFFFFFFF, 7)
                ss2 = ss1 ^ rol32(a, 12)
                ff = a ^ b ^ c if j < 16 else (a & b) | (a & c) | (b & c)
                gg = e ^ f ^ g if j < 16 else (e & f) | ((~e) & g)
                tt1 = (ff + d + ss2 + w1[j]) & 0xFFFFFFFF
                tt2 = (gg + h + ss1 + w[j]) & 0xFFFFFFFF
                d, c, b, a = c, rol32(b, 9), a, tt1
                h, g, f, e = g, rol32(f, 19), e, (tt2 ^ rol32(tt2, 9) ^ rol32(tt2, 17)) & 0xFFFFFFFF
            iv = [(x ^ y) & 0xFFFFFFFF for x, y in zip(iv, (a, b, c, d, e, f, g, h))]
        return b"".join(x.to_bytes(4, "big") for x in iv)

xtime = lambda a: (((a << 1) ^ 0x1B) & 0xFF) if (a & 0x80) else (a << 1)

def rol(num, shift):
    shift %= 32
    # Perform the left rotation
    return ((num << shift) | (num >> (32 - shift))) & 0xFFFFFFFF

def rl8(x: int, k: int) -> int:
    n = 8
    s = k & (n - 1)
    return ((x << s) | (x >> (n - s))) & 0xff

def ror32(value, count):
    count %= 32
    low = value << (32 - count)
    value >>= count
    value |= low
    value &= 0xFFFFFFFF
    return value

def ror(value, count):
    count %= 64
    low = value << (64 - count)
    value >>= count
    value |= low
    value &= 0xFFFFFFFFFFFFFFFF
    return value

def get_key_hash(key, rand):
    to_hash = bytearray(68)
    to_hash[:32] = key
    to_hash[32:36] = rand.to_bytes(4, byteorder='little')
    to_hash[36:] = key

    d1 = (rand >> 16) & 0x000000ff
    d2 = (d1 << 11) | (rand >> 24)
    d2 ^= (d1 >> 5) ^ d1
    d2 = ~d2 & 0xffffffff

    return SM3(to_hash).digest(), d2.to_bytes(4, "little")

def split_blocks(message, block_size=16, require_padding=True):
    assert len(message) % block_size == 0 or not require_padding
    return [message[i:i + 16] for i in range(0, len(message), block_size)]

def add_round_key(s, k):
    for i in range(4):
        for j in range(4):
            s[i][j] ^= k[i][j]

def add_round_key_con(s, k, con):
    for i in range(4):
        for j in range(4):
            s[i][j] ^= k[i][con[j]]

def bytes2matrix(text):
    """ Converts a 16-byte array into a 4x4 matrix.  """
    return [list(text[i:i + 4]) for i in range(0, len(text), 4)]

def xor_bytes(a, b):
    """ Returns a new byte array with the elements xor'ed. """
    return bytearray(i ^ j for i, j in zip(a, b))

def matrix2bytes(matrix):
    """ Converts a 4x4 matrix into a 16-byte array.  """
    return bytearray(sum(matrix, []))

def mix_single_column(a, i):
    t = a[0][i] ^ a[1][i] ^ a[2][i] ^ a[3][i]
    u = a[0][i]
    a[0][i] ^= t ^ xtime(a[0][i] ^ a[1][i])
    a[1][i] ^= t ^ xtime(a[1][i] ^ a[2][i])
    a[2][i] ^= t ^ xtime(a[2][i] ^ a[3][i])
    a[3][i] ^= t ^ xtime(a[3][i] ^ u)

def mix_columns(s):
    for i in range(4):
        mix_single_column(s, i)

def inv_mix_columns(s):
    for i in range(0, 4):
        inv_mix_single_column(s, i)

def inv_mix_single_column(a, i):
    u = xtime(xtime(a[0][i] ^ a[2][i]))
    v = xtime(xtime(a[1][i] ^ a[3][i]))
    a[0][i] ^= u
    a[1][i] ^= v
    a[2][i] ^= u
    a[3][i] ^= v

    mix_single_column(a, i)

s_box = b''.join([
    b'\xFA\x7D\x08\x6B\x9C\x59\xB3\x4B\x04\x5F\x39\xD0\x38\x4A\x91\x99',
    b'\x00\x67\xA6\x20\x9F\xF5\x4D\x82\x73\x26\xEE\xDF\x18\x66\x83\x33',
    b'\x80\x03\x19\xFB\xD9\xFE\xAE\xAA\xA9\xB0\x52\xC6\x0B\xF3\x79\x25',
    b'\x4E\x78\xB4\x36\xAC\x5D\x1A\x27\x9E\x88\xDB\xBD\x3C\x63\xEC\x49',
    b'\x15\xC1\x30\x1F\xDC\xB8\x56\xD4\x6C\xCD\xCA\x09\x43\xC8\x35\xA3',
    b'\xEF\x1E\xF4\x96\xD2\xFC\x0E\x72\x7B\x94\x84\xD1\xEA\x45\x5A\x62',
    b'\x02\x3F\xD3\x12\x81\x34\x2B\xDD\x7E\xE6\x28\xF2\xA5\x46\x13\x01',
    b'\x3B\x21\xF6\x61\x37\x29\x2A\x0D\xED\x8C\xAF\xBF\x9D\x5C\xBB\x24',
    b'\x76\x0F\x75\xE4\x53\x89\xE1\x98\x8D\xB1\x9A\x65\x70\x4F\x54\x4C',
    b'\x58\xAB\x6E\x6F\x8B\x23\xC4\x07\x11\x0C\xBA\xCF\xA0\xA4\x8E\xD8',
    b'\x05\x3D\x14\xB2\xDA\x74\xC3\xD7\xE7\xBE\xD6\x7F\xDE\x48\x16\x3E',
    b'\x85\x90\xA1\x55\xB7\x77\x42\x22\xC9\x86\x50\x2E\x17\xF9\x64\x31',
    b'\x2C\x9B\xF1\x6D\x1C\x44\x68\xE3\xE9\xA8\x93\x97\xCB\x32\x57\xEB',
    b'\xE5\x71\x6A\xAD\xC0\xCC\xC7\xC5\xFD\x60\x1D\xA2\x2D\x47\xA7\xE2',
    b'\x51\x69\x5E\x7A\xCE\x0A\x41\xB6\x95\x8F\xF7\xB9\x87\xE0\x3A\x06',
    b'\x10\x8A\xB5\xF8\x5B\xD5\xF0\xBC\x92\xFF\x7C\x2F\xC2\xE8\x1B\x40',
    b'\xEC\x1B\xDA\xBD\xBA\x98\x91\x0C\xB2\x2B\x83\x41\x34\x67\xFB\x0A',
    b'\xD8\x76\xB5\x46\x05\x59\x61\x23\x75\x90\x87\x2A\xE3\x50\x15\x4C',
    b'\xAC\xB1\x79\xEB\xAE\xE5\x95\x47\x04\x68\xF0\x86\x3D\x51\x8B\x0F',
    b'\xCA\x8E\xE4\xB9\x4E\xF2\x12\x82\xBC\x0E\xD5\xF7\xEF\x28\x25\xCF',
    b'\x5B\x5D\xE9\x6A\x55\x02\xE1\x33\xBE\x93\xE7\xF5\xAD\x9D\x3E\x39',
    b'\x24\xA8\xE2\xFA\x17\x57\xD0\x7A\x0D\x08\x30\xD6\xB8\xA3\x8D\xFD',
    b'\x07\x9A\xC4\x1E\x6E\x22\x64\x97\xD2\x1D\xB0\xBF\x45\x66\x3F\x6C',
    b'\xDD\xDB\x27\x80\xA7\x11\xDC\xA6\xC5\x52\xF8\xC0\xB6\xC8\x5C\x00',
    b'\x73\x60\x7B\xA0\x19\x13\xAA\xC9\x35\x48\x4B\xD3\xA4\xCD\x9F\x99',
    b'\xF3\x10\x44\x40\x54\x7E\x29\xF4\x06\x1F\xA2\xAB\xA1\x2F\x3C\xF6',
    b'\xAF\x85\x62\x36\x21\x7F\x5E\xDF\x20\x1A\xB3\xB4\xE6\xFF\x72\x84',
    b'\x8F\x65\x26\x94\x5A\x77\xEA\x43\x78\xC7\x4A\xCC\x2C\x14\x6B\xC6',
    b'\xE8\x74\x53\xFC\xD4\x1C\xCE\x31\x70\x03\x18\x8C\x96\x38\x32\x89',
    b'\xF1\x3A\x5F\xD7\xF9\xA9\x69\xB7\x63\x37\x58\xC2\x3B\xC3\x71\xCB',
    b'\x9E\x92\x01\x8A\x0B\x4D\x88\x9B\xBB\x4F\x6D\x6F\xE0\xFE\xA5\x49',
    b'\xDE\x56\x16\x09\xED\x9C\xC1\x2D\xEE\x81\x7D\xD9\x7C\xD1\x2E\x42',
    b'\x5B\x4D\xC1\xA6\x5D\xEA\x44\xFD\x45\x4E\x1B\xA1\x3F\xD1\x89\xE1',
    b'\x7D\x2F\xAA\xDB\xAB\xAD\x59\xCB\xB1\xCE\x9A\x28\xC9\xE0\xF6\x70',
    b'\x39\x4A\xD7\xFF\x30\xF5\xDD\xBC\x57\x3B\x11\x8D\xB2\xEE\x00\xB6',
    b'\xE6\x1A\x5A\x7C\xF9\xDE\xC4\xCD\x2E\x80\xBB\xB9\x4C\xA5\x9F\x84',
    b'\x08\xC6\x6F\x42\x6C\xF0\x27\xE7\x8B\x3A\x9C\x51\xFB\x67\x21\x75',
    b'\x41\x31\xA7\xCA\x20\x43\x2A\xB7\xBF\xD9\x7A\xF2\xB5\xF8\x8C\x2C',
    b'\x23\x83\x4F\x8F\x60\xA0\x04\x13\x37\x14\xE3\x01\xC5\x63\x66\x5C',
    b'\x74\x81\xDF\x58\xBD\x68\x90\x3D\xD2\xB3\x34\xF4\x19\x93\x32\x29',
    b'\xD6\x49\xAE\x0D\x4B\xD8\x07\x9E\xAC\x1E\x2D\x0B\x40\xB8\x72\xBA',
    b'\x76\x10\x71\xA8\xE4\x56\x1D\x48\xFE\xE5\xC2\x47\x91\xDA\x87\x26',
    b'\x9D\x1F\x88\x6B\xC0\x98\xBE\x25\x09\x97\x33\xA3\x85\x16\x5E\x7F',
    b'\xDC\x6E\x54\xE9\xF7\xA9\xC8\xE8\xC3\x77\xD0\x82\x2B\xEC\x02\x62',
    b'\x8A\x92\x0E\x3E\xB0\x0F\x05\xF3\xF1\x96\x78\x38\x86\x36\x18\x3C',
    b'\x24\xCF\x0A\xB4\x53\xCC\x61\x65\xA4\xC7\x94\xD5\x15\x7E\x6D\xEF',
    b'\x79\x22\x35\x12\x6A\x8E\x52\x06\x55\x7B\x46\x64\x50\x95\xE2\x0C',
    b'\xED\xD3\x17\x03\xA2\x9B\x99\xEB\x1C\xFC\xAF\xD4\x73\x69\xFA\x5F',
    b'\xF7\x2C\x1E\xBF\xC8\xE1\xF3\x9F\x76\x80\x71\x48\xAA\x94\xAD\x64',
    b'\xFB\x89\xC6\x60\xC3\x32\xB3\x4D\xD2\xE0\x44\xDD\x5F\xA8\xB1\xC7',
    b'\x68\x23\x34\xC9\x6D\x12\x7F\xB7\xEB\x15\xBE\xA9\xD1\x78\x93\xA0',
    b'\x0C\x92\xA4\xD7\x47\xE3\x8A\xC2\x70\xAB\x26\x41\x9A\x79\xA7\xD8',
    b'\x14\x85\x8F\xC0\x6F\x56\xD0\x8C\x11\xB9\x2E\x3C\xE2\x9D\xCF\x0E',
    b'\xDE\x03\x5D\x46\x3E\xCD\x38\x43\x0F\x33\x5A\xD9\x1A\x65\x6C\x22',
    b'\x3B\xFC\x30\xA6\x88\xEA\x37\xA2\xB4\x8D\x8E\x51\x9C\xD6\x40\xEE',
    b'\xF9\xF8\x84\xF4\xAE\x97\xE9\xCA\x0A\x45\x67\x57\x04\x2F\x83\x5C',
    b'\xD5\xC5\xC4\x82\xB6\xA3\x91\x98\x1F\x4A\xAC\x96\x81\x6E\xCB\x1B',
    b'\x09\x08\xAF\x18\x95\x49\x7D\x54\xED\xFA\x16\x31\x3A\xDA\xB8\x66',
    b'\xF5\xA5\xF1\xFE\x10\x01\x06\x74\xCC\x63\xDF\x7C\x28\x25\xF6\xCE',
    b'\xB2\x4F\x8B\xE5\xBC\x87\x69\xBB\x86\x21\x07\x00\x36\xE7\x0B\x50',
    b'\x59\x9B\x1C\xE8\x62\x58\x19\x61\xF2\xBD\x27\x5E\xBA\x1D\xE6\x99',
    b'\x42\x3D\x0D\x2A\xB5\xDC\x5B\x29\xF0\x2D\x4C\x53\x7B\x6A\x73\x4E',
    b'\x3F\x75\xFF\x4B\xA1\x35\x17\x55\x72\x39\x20\xD3\xB0\xFD\xEF\x02',
    b'\xEC\x77\x7E\xE4\x2B\xDB\x90\xC1\x05\x9E\x7A\xD4\x52\x6B\x24\x13'])

inv_s_box = bytearray(1024)

class AES_V3():
    r_con = [[1, 0, 2, 3], [1, 3, 0, 2], [0, 1, 3, 2], [1, 0, 2, 3]]
    r_con2 = [[1, 0, 2, 3], [2, 0, 3, 1], [0, 1, 3, 2], [1, 0, 2, 3]]
    r_orders = [[0, 9, 14, 11, 4, 13, 2, 7, 8, 1, 6, 15, 12, 5, 10, 3],
                [0, 9, 14, 15, 4, 13, 2, 7, 8, 1, 6, 3, 12, 5, 10, 11],
                [0, 9, 14, 7, 4, 13, 2, 11, 8, 1, 6, 3, 12, 5, 10, 15],
                [0, 9, 14, 11, 4, 13, 2, 7, 8, 1, 6, 15, 12, 5, 10, 3]]

    def __init__(self, aes_key, khronos):
        self.word_size = khronos & 3  # khronos - (khronos & -4)
        self.aes_key = aes_key

        self.s_box = s_box[self.word_size << 8:]
        self.inv_s_box = inv_s_box[self.word_size << 8:]

        self.master_key = self._expand_key()
        self._key_matrices = bytes2matrix(self.master_key)
        self.con = self.r_con[self.word_size]
        self.con2 = self.r_con2[self.word_size]

        self.order = self.r_orders[self.word_size]

    def _expand_key(self):
        init_values = [0xca025ddc, 0x823dc546, 0xc9420583, 0xc298225f]
        init_value = init_values[self.word_size]
        mk = bytearray(init_value.to_bytes(4, "little"))
        mk = mk * 4

        mk = xor_bytes(mk, self.aes_key)
        mk += bytearray(32)

        rounds = 8

        for i in range(4, 12):
            idx = 4 * (i - 1)
            k0, k1, k2, k3 = mk[idx], mk[idx + 1], mk[idx + 2], mk[idx + 3]

            if i & 3 == 0:
                k00 = (init_value >> (rounds & 24)) ^ self.s_box[k1]
                k1 = self.s_box[k2]
                k2 = self.s_box[k3]
                k3 = self.s_box[k0]
                k0 = k00 & 0xff
            rounds += 2

            mk[idx + 4] = k0 ^ mk[idx - 12]
            mk[idx + 5] = k1 ^ mk[idx - 11]
            mk[idx + 6] = k2 ^ mk[idx - 10]
            mk[idx + 7] = k3 ^ mk[idx - 9]
        return mk

    @staticmethod
    def sum_data(data):
        key = bytearray(32)
        for i in range(31):
            idx = i * 8
            n0 = (data[idx] >> 4) & 2
            n1 = n0 | data[idx + 1] & 64
            n2 = n1 | (data[idx + 2] >> 2) & 1
            n3 = n2 | (data[idx + 3] << 3) & -128
            n4 = n3 | (data[idx + 4] >> 1) & 4
            n5 = n4 | (data[idx + 5] << 3) & 16
            n6 = n5 | (data[idx + 6] << 5) & 32
            n7 = n6 | (data[idx + 7] >> 4) & 8
            key[i] = (n7 & 0xff)

        key[31] = 1
        return key

    @staticmethod
    def mix_columns(data, key):
        data = bytearray(data)

        for i in range(31):
            kk = key[i]
            idx = i * 8
            # print(k, data[idx + 1], (data[idx + 1] & -65) | (k & 64))
            data[idx + 0] = (data[idx + 0] & -33) | ((kk << 4) & 0xff & 32)
            data[idx + 1] = (data[idx + 1] & -65) | (kk & 64)
            data[idx + 2] = (data[idx + 2] & -5) | ((kk * 4) & 4)
            data[idx + 3] = (data[idx + 3] & -17) | ((kk >> 3) & 16)
            data[idx + 4] = (data[idx + 4] & -9) | ((kk + kk) & 8)
            data[idx + 5] = (data[idx + 5] & -3) | ((kk >> 3) & 2)
            data[idx + 6] = (data[idx + 6] & -2) | ((kk >> 5) & 1)
            data[idx + 7] = (data[idx + 7] & 127) | ((kk << 4) & 0xff & -128)

        return data

    def encrypt(self, data, iv):
        plaintext = self.sum_data(data)
        blocks = []
        previous = iv
        for plaintext_block in split_blocks(plaintext):
            x = xor_bytes(plaintext_block, previous)
            block = self.encrypt_block(x)
            blocks.append(block)
            previous = block

        key = b''.join(blocks)
        # key = bytes.fromhex('a22c23b05bb4a831d31bbdbd1327c5f84991bca3e7d8df24e52f58b7ac61f2e0')
        # print("sign_key", key.hex())
        data = self.mix_columns(data, key)
        return key[-1:] + data

    def encrypt_block(self, plaintext):
        # print("b000", plaintext.hex())
        plain_state = bytes2matrix(plaintext)

        add_round_key_con(plain_state, self._key_matrices[0:4], self.con2)
        # print("b001", matrix2bytes(plain_state).hex())

        for i in range(1, 3):
            self.sub_bytes(plain_state)
            # print("b003", matrix2bytes(plain_state).hex())
            self.shift_rows(plain_state)
            # print("b004", matrix2bytes(plain_state).hex())
            if i == 1:
                self.shift_rows_con(plain_state, self.con2)
                mix_columns(plain_state)

            add_round_key_con(plain_state, self._key_matrices[i * 4:], self.con2)

        add_round_key(plain_state, self._key_matrices[4:])

        return matrix2bytes(plain_state)

    def decrypt(self, ciphertext, iv, data):
        assert len(iv) == 16

        blocks = []
        previous = iv

        for ciphertext_block in split_blocks(ciphertext):
            dc = xor_bytes(previous, self.decrypt_block(ciphertext_block))
            # dc = matrix2bytes(dcm)
            blocks.append(dc)
            previous = ciphertext_block

        key = b''.join(blocks)
        # print("sign_key", key.hex())
        data = self.mix_columns(data, key)
        return data

    def decrypt_block(self, ciphertext):
        assert len(ciphertext) == 16
        cipher_state = bytes2matrix(ciphertext)

        # print("b000", matrix2bytes(cipher_state).hex())
        add_round_key(cipher_state, self._key_matrices[4:])
        #         print("b001", matrix2bytes(cipher_state).hex())

        for i in range(2, 0, -1):
            add_round_key_con(cipher_state, self._key_matrices[i * 4:], self.con2)
            #             print("b002", i, matrix2bytes(cipher_state).hex())

            if i == 1:
                inv_mix_columns(cipher_state)
                self.shift_rows_con(cipher_state, self.con)

            self.inv_shift_rows(cipher_state)
            #             print("b004", i, matrix2bytes(cipher_state).hex())
            self.inv_sub_bytes(cipher_state)
        #             print("b005", i, matrix2bytes(cipher_state).hex())

        add_round_key_con(cipher_state, self._key_matrices[0:4], self.con2)

        return matrix2bytes(cipher_state)

    def shift_rows_con(self, s, c):
        for i in range(4):
            # c = self.con
            s[i][0], s[i][1], s[i][2], s[i][3] = s[i][c[0]], s[i][c[1]], s[i][c[2]], s[i][c[3]]

    def shift_rows(self, s):
        bs = matrix2bytes(s)
        for i in range(4):
            for j in range(4):
                s[i][j] = bs[self.order[i * 4 + j]]

    def inv_shift_rows(self, s):
        order = bytearray(16)
        for i in range(16):
            order[self.order[i]] = i

        bs = matrix2bytes(s)
        for i in range(4):
            for j in range(4):
                s[i][j] = bs[order[i * 4 + j]]

    def sub_bytes(self, s):
        for i in range(4):
            for j in range(4):
                s[i][j] = self.s_box[s[i][j]]

        s[0], s[1], s[2], s[3] = s[self.con2[0]], s[self.con2[1]], s[self.con2[2]], s[self.con2[3]]

    def inv_sub_bytes(self, s):
        for i in range(4):
            for j in range(4):
                s[i][j] = self.inv_s_box[s[i][j]]
        s[0], s[1], s[2], s[3] = s[self.con[0]], s[self.con[1]], s[self.con[2]], s[self.con[3]]

def leftCircularShift(k, bits):
    bits = bits % 32
    k = k % (2 ** 32)
    upper = (k << bits) % (2 ** 32)
    result = upper | (k >> (32 - (bits)))
    return (result)

def blockDivide(block, chunks):
    result = []
    size = len(block) // chunks
    for i in range(0, chunks):
        result.append(int.from_bytes(block[i * size:(i + 1) * size], byteorder="little"))
    return (result)

def F(X, Y, Z):
    return ((X & Y) | ((~X) & Z))

def G(X, Y, Z):
    return ((X & Z) | (Y & (~Z)))

def H(X, Y, Z):
    return (X ^ Y ^ Z)

def I(X, Y, Z):
    return (Y ^ (X | (~Z))) & 0xffffffff

def FF(a, b, c, d, M, s, t):
    result = b + leftCircularShift((a + F(b, c, d) + M + t), s)

    return (result)

def GG(a, b, c, d, M, s, t):
    result = b + leftCircularShift((a + G(b, c, d) + M + t), s)
    return (result)

def HH(a, b, c, d, M, s, t):
    result = b + leftCircularShift((a + H(b, c, d) + M + t), s)
    return (result)

def II(a, b, c, d, M, s, t):
    result = b + leftCircularShift((a + I(b, c, d) + M + t), s)
    return (result)

def sum_md5(data):
    check_sum = 0x20220420
    for i in range(12):
        if i % 2 == 0:
            temp = (check_sum >> 3) ^ check_sum
            check_sum = data[i] ^ (check_sum << 7)
        else:
            temp = (check_sum >> 5) ^ check_sum
            check_sum = data[i] | (check_sum << 11)
            check_sum ^= 0xffffffff

        check_sum ^= temp
        check_sum &= 0xffffffff

    check_sum |= 4
    check_sum ^= 0x1000000
    return check_sum

SV2 = [0xa7aefe20, 0x7149f1d6, 0x47e4ca07, 0xe9b58f67, 0x93b924de, 0xc614d0f5, 0x38afe0ef, 0xb2bbad73,
       0xe24444c3, 0x9d3aec9b, 0xdf7b37e4, 0xd8b16d40, 0xf8ac31b8, 0x76b9a90b, 0x31d833ee, 0x953fce64,
       0x353595a4, 0x4609c13b, 0x36925008, 0x8c6d0925, 0x5df5c177, 0x1cfbf52b, 0x8a4fa7f0, 0x114ca35e,
       0x8193f984, 0x7a7a8733, 0x316ab4d5, 0x3c20cfc9, 0xa6d84453, 0x3a18500c, 0x798ec47a, 0x97a76b28,
       0x66c4ff96, 0x51716443, 0xdd2fc3b, 0xb5696da7, 0xbbeb3ac5, 0x5c53d204, 0xd32608ce, 0x7279b9ec,
       0xf4188ecf, 0xf7d793db, 0x332cc491, 0xab76ae15, 0x9bebe727, 0x18a01384, 0x5be9f8a7, 0x5f90a754,
       0x39b663c0, 0x36673c83, 0x7c92f514, 0x9d7d94d7, 0xe2e8d9aa, 0x5f7e9ea9, 0x7abd4551, 0x569e05da,
       0x40a25632, 0x3df5a9a5, 0xbab37d80, 0x454286dc, 0x3f5d4e78, 0x3d7b75d, 0xb1fe4af7, 0xa5ab26a3]

def md5sum_v3(msg, count_v2, orders, count_v1, n=0):
    count = count_v2 & 0xff

    sv = [0] * 64
    for i in range(64):
        sv[i] = ror32(SV2[i], count_v1)

    start = [
        ror32(0x79e0f2fb, count),
        ror32(0xc8b52570, count),
        ror32(0xebc2f8cd, count),
        ror32(0x7c104d93, count)
    ]

    count = (count_v2 + 6) & 0xff
    end = [
        ror32(0x19be4866, count),
        ror32(0xe85986b4, count),
        ror32(0xe19b326e, count),
        ror32(0x71d1d7d4, count)
    ]
    A = start[0]  # 0x79e0f2fb
    B = start[1]  # 0xc8b52570
    C = start[2]  # 0xebc2f8cd
    D = start[3]  # 0x7c104d93

    a = A
    b = B
    c = C
    d = D
    block = msg[:64]
    M = blockDivide(block, 16)

    order1 = orders[:16]
    order2 = orders[16:32]
    order3 = orders[32:48]
    order4 = orders[48:]
    # Rounds
    a = FF(a, b, c, d, M[order1[0]], 7, sv[0])
    d = FF(d, a, b, c, M[order1[1]], 12, sv[1])  # 0xb6bc6ddb
    c = FF(c, d, a, b, M[order1[2]], 17, sv[2])  # 0xf80b15d4
    b = FF(b, c, d, a, M[order1[3]], 22, sv[3])
    a = FF(a, b, c, d, M[order1[4]], 7, sv[4])
    d = FF(d, a, b, c, M[order1[5]], 12, sv[5])
    c = FF(c, d, a, b, M[order1[6]], 17, sv[6])
    b = FF(b, c, d, a, M[order1[7]], 22, sv[7])
    a = FF(a, b, c, d, M[order1[8]], 7, sv[8])
    d = FF(d, a, b, c, M[order1[9]], 12, sv[9])
    c = FF(c, d, a, b, M[order1[10]], 17, sv[10])
    b = FF(b, c, d, a, M[order1[11]], 22, sv[11])
    a = FF(a, b, c, d, M[order1[12]], 7, sv[12])
    d = FF(d, a, b, c, M[order1[13]], 12, sv[13])
    c = FF(c, d, a, b, M[order1[14]], 17, sv[14])
    b = FF(b, c, d, a, M[order1[15]], 22, sv[15])

    a = GG(a, b, c, d, M[order2[0]], 5, sv[16])
    d = GG(d, a, b, c, M[order2[1]], 9, sv[17])
    c = GG(c, d, a, b, M[order2[2]], 14, sv[18])
    b = GG(b, c, d, a, M[order2[3]], 20, sv[19])
    a = GG(a, b, c, d, M[order2[4]], 5, sv[20])
    d = GG(d, a, b, c, M[order2[5]], 9, sv[21])
    c = GG(c, d, a, b, M[order2[6]], 14, sv[22])
    b = GG(b, c, d, a, M[order2[7]], 20, sv[23])
    a = GG(a, b, c, d, M[order2[8]], 5, sv[24])
    d = GG(d, a, b, c, M[order2[9]], 9, sv[25])
    c = GG(c, d, a, b, M[order2[10]], 14, sv[26])
    b = GG(b, c, d, a, M[order2[11]], 20, sv[27])
    a = GG(a, b, c, d, M[order2[12]], 5, sv[28])
    d = GG(d, a, b, c, M[order2[13]], 9, sv[29])
    c = GG(c, d, a, b, M[order2[14]], 14, sv[30])
    b = GG(b, c, d, a, M[order2[15]], 20, sv[31])

    a = HH(a, b, c, d, M[order3[0]], 4, sv[32])
    d = HH(d, a, b, c, M[order3[1]], 11, sv[33])
    c = HH(c, d, a, b, M[order3[2]], 16, sv[34])
    b = HH(b, c, d, a, M[order3[3]], 23, sv[35])
    a = HH(a, b, c, d, M[order3[4]], 4, sv[36])
    d = HH(d, a, b, c, M[order3[5]], 11, sv[37])
    c = HH(c, d, a, b, M[order3[6]], 16, sv[38])
    b = HH(b, c, d, a, M[order3[7]], 23, sv[39])
    a = HH(a, b, c, d, M[order3[8]], 4, sv[40])
    d = HH(d, a, b, c, M[order3[9]], 11, sv[41])
    c = HH(c, d, a, b, M[order3[10]], 16, sv[42])
    b = HH(b, c, d, a, M[order3[11]], 23, sv[43])
    a = HH(a, b, c, d, M[order3[12]], 4, sv[44])
    d = HH(d, a, b, c, M[order3[13]], 11, sv[45])
    c = HH(c, d, a, b, M[order3[14]], 16, sv[46])
    b = HH(b, c, d, a, M[order3[15]], 23, sv[47])

    a = II(a, b, c, d, M[order4[0]], 6, sv[48])
    d = II(d, a, b, c, M[order4[1]], 10, sv[49])
    c = II(c, d, a, b, M[order4[2]], 15, sv[50])
    b = II(b, c, d, a, M[order4[3]], 21, sv[51])
    a = II(a, b, c, d, M[order4[4]], 6, sv[52])
    d = II(d, a, b, c, M[order4[5]], 10, sv[53])
    c = II(c, d, a, b, M[order4[6]], 15, sv[54])
    b = II(b, c, d, a, M[order4[7]], 21, sv[55])
    a = II(a, b, c, d, M[order4[8]], 6, sv[56])
    d = II(d, a, b, c, M[order4[9]], 10, sv[57])
    c = II(c, d, a, b, M[order4[10]], 15, sv[58])
    b = II(b, c, d, a, M[order4[11]], 21, sv[59])
    a = II(a, b, c, d, M[order4[12]], 6, sv[60])
    d = II(d, a, b, c, M[order4[13]], 10, sv[61])
    c = II(c, d, a, b, M[order4[14]], 15, sv[62])
    b = II(b, c, d, a, M[order4[15]], 21, sv[63])

    A = (A + a) % (2 ** 32) ^ end[0]
    B = (B + b) % (2 ** 32) ^ end[1]
    C = (C + c) % (2 ** 32) ^ end[2]
    D = (D + d) % (2 ** 32) ^ end[3]

    result = bytearray(
        A.to_bytes(4, "little") + B.to_bytes(4, "little") + C.to_bytes(4, "little") + D.to_bytes(4, "little"))

    result += sum_md5(result).to_bytes(4, "little")
    return result

def bxor(b1, b2):
    b3 = bytearray(len(b1))
    for i in range(len(b1)):
        b3[i] = b1[i] ^ b2[i]
    return b3

def get_iv(iv, data):
    for i in range(len(data)):
        if i & 1 == 0:
            iv = (iv >> 4) ^ iv ^ (iv << 6) ^ data[i]
        else:
            iv = ~((iv >> 7) ^ iv ^ (data[i] | iv << 12))
        iv = iv & 0xffffffff
    return iv

def hash_f13(query_sm3, body_md5_bytes, ts_bytes, khronos):
    iv = get_iv(0x20230928, query_sm3)
    iv = get_iv(iv, body_md5_bytes)
    iv = get_iv(iv, ts_bytes)

    iv_v0 = ((iv & 15) * 171) >> 9
    branch = (iv & 15) - ((iv_v0 * 3) & 0xff)
    if branch == 0:
        return branch_0(iv_v0, khronos, query_sm3, body_md5_bytes, ts_bytes)
    elif branch == 1:
        return branch_1(iv_v0, khronos, query_sm3, body_md5_bytes, ts_bytes)
    elif branch == 2:
        return branch_2(iv, khronos, query_sm3, body_md5_bytes, ts_bytes)
    else:
        raise Exception("no branch: " + str(branch))

def branch_0(iv_v0, khronos, query_sm3, body_md5_bytes, ts_bytes):
    tt01 = [0xc4a78580, 0xb3c0fd39, 0xc58c5686, 0xc9aa3ba7, 0xf5a7adf2, 0x963c2ed1]
    iv_v1 = tt01[iv_v0]

    count_v1 = (iv_v1 + khronos + 1) & 0xff
    count_v2 = (iv_v1 + khronos) & 0xffffffff

    tt02 = [0xebb64faf, 0x7aadcc2, 0xcf3187bf, 0xe01138ff, 0x6d0bfcff, 0x5a30a3be, 0xb41ad638, 0x34180eb8, 0xf233eb6f,
            0xb1a584cc, 0xccc30dc7, 0x47d1db51, 0xd55653de, 0x70a84fa1, 0x57473c12, 0xf76f0288, 0x2c077f0a, 0xda0dcad0,
            0xfbb86f6c, 0xfdc4cf00, 0x688a020d, 0xe676c6a6, 0x8cd6338b, 0x1a3c8d0e, 0xcce8b06b, 0x6ad0ed0b, 0xa0522717,
            0xdc71ac83, 0x2285db71, 0xd5b4dda6, 0x736f8650, 0x6560306c, 0x617ce2a6, 0xe423417e, 0xa40e143, 0x544e4032,
            0x88dffb2a, 0x716c1ae0, 0x4c467a88, 0x5b23bb3, 0xe1d0b866, 0xbaa3dcb8, 0xae3374d3, 0xc3381a50, 0x1702f75b,
            0xfe6da368, 0xf0b4cf48, 0x4e0ffbb8, 0x72aad10d, 0x26c53a3d, 0xf2bce0f6, 0xb4557581, 0x4a257fdd, 0x8c3182a2,
            0xab0b3b86, 0x3d5dfb14, 0x4f103634, 0xd37b52d7, 0x444eff16, 0xeb0a33d1, 0x6ca86f6e, 0x284ba7, 0x8387cfa,
            0x5fb37586]

    tt03 = [0] * 64
    for i in range(0, 64):
        tt03[i] = ror32(tt02[i], count_v1) & 0xffffffff

    n0 = (count_v2 + 2) & 7

    pad = bytearray(4)
    seed = bytes([0xfa, 0x45, 0x61, 0xd7])
    for i in range(4):
        v = int.from_bytes(bytes([seed[i], seed[i]]), 'little')
        v = v >> n0
        pad[i] = v & 0xff

    count_v2 = count_v2 & 0xff
    init_value = [
        ror32(0x7aba4fc8, count_v2), ror32(0x67166507, count_v2),
        ror32(0x6403fa00, count_v2), ror32(0x340f512f, count_v2),
        ror32(984304912, count_v2), ror32(3005047866, count_v2),
        ror32(2874125293, count_v2), ror32(2152413264, count_v2)
    ]

    data = query_sm3 + body_md5_bytes + ts_bytes + pad + bytes.fromhex(' 00 00 00 00 00 00 01 a0')
    di = [0] * (len(data) // 4)
    for i in range(len(data) // 4):
        di[i] = int.from_bytes(data[i * 4:i * 4 + 4], "big")

    di0 = di[0]
    for i in range(112):
        di1, di14 = di[i + 1], di[i + 14]
        r_di1 = rol(di1, 14) ^ rol(di1, 25) ^ (di1 >> 3)
        r_di2 = rol(di14, 13) ^ rol(di14, 15) ^ (di14 >> 10)
        di0 = di0 + di[i + 9] + r_di1 + r_di2
        di.append(di0 & 0xffffffff)
        di0 = di1

    if iv_v0 == 5:
        v_j = branch0_xor(init_value, iv_v1, di, tt03, 100, 2, 0, 3, 5, 4, 6, 7, 2, 1, 5)
    elif iv_v0 == 4:
        v_j = branch0_xor(init_value, iv_v1, di, tt03, 96, 0, 5, 6, 7, 3, 1, 2, 5, 4, 4)
    elif iv_v0 == 3:
        v_j = branch0_xor(init_value, iv_v1, di, tt03, 99, 3, 6, 2, 4, 5, 1, 0, 0, 7, 6)
    elif iv_v0 == 2:
        v_j = branch0_xor(init_value, iv_v1, di, tt03, 96, 7, 6, 2, 1, 4, 0, 5, 4, 3, 5)
    elif iv_v0 == 1:
        v_j = branch0_xor(init_value, iv_v1, di, tt03, 96, 0, 6, 7, 5, 3, 2, 1, 5, 4, 4)
    elif iv_v0 == 0:
        v_j = branch0_xor(init_value, iv_v1, di, tt03, 101, 5, 7, 6, 3, 2, 1, 0, 5, 4, 3)

    ret = bytearray(32)
    for i in range(8):
        ret[i * 4:i * 4 + 4] = ((v_j[i] + init_value[i]) & 0xffffffff).to_bytes(4, 'big')

    ret = bxor(ret[:16], ret[16:])
    sum = sum_md5(ret)
    ret += sum.to_bytes(4, "little")
    return ret

def swap_v0(src, src_xor, tt2, table_f, order1, typ=None):
    da0 = [0] * 8
    ha0 = src_xor[:]
    for i in range(8):
        da0[i] = src[order1[i]] ^ src_xor[i]

    for round in range(10):
        rr_0 = r00(ha0[0], ha0[1], ha0[2], ha0[3], ha0[4], ha0[5], ha0[6], ha0[7], 0, table_f)
        rr_1 = r00(ha0[1], ha0[2], ha0[3], ha0[4], ha0[5], ha0[6], ha0[7], ha0[0], 0, table_f)
        rr_2 = r00(ha0[2], ha0[3], ha0[4], ha0[5], ha0[6], ha0[7], ha0[0], ha0[1], 0, table_f)
        rr_3 = r00(ha0[3], ha0[4], ha0[5], ha0[6], ha0[7], ha0[0], ha0[1], ha0[2], 0, table_f)
        rr_4 = r00(ha0[4], ha0[5], ha0[6], ha0[7], ha0[0], ha0[1], ha0[2], ha0[3], 0, table_f)
        rr_5 = r00(ha0[5], ha0[6], ha0[7], ha0[0], ha0[1], ha0[2], ha0[3], ha0[4], 0, table_f)
        rr_6 = r00(ha0[6], ha0[7], ha0[0], ha0[1], ha0[2], ha0[3], ha0[4], ha0[5], 0, table_f)
        rr_7 = r00(ha0[7], ha0[0], ha0[1], ha0[2], ha0[3], ha0[4], ha0[5], ha0[6], 0, table_f)
        rr_7 = rr_7 ^ tt2[round + 1]

        d0, d1, d2, d3, d4, d5, d6, d7 = da0[0], da0[1], da0[2], da0[3], da0[4], da0[5], da0[6], da0[7]

        da0[0] = r00(d0, d1, d2, d3, d4, d5, d6, d7, rr_0, table_f)
        da0[1] = r00(d1, d2, d3, d4, d5, d6, d7, d0, rr_1, table_f)  # 0xd0a489b35ba678e8
        da0[2] = r00(d2, d3, d4, d5, d6, d7, d0, d1, rr_2, table_f)  # 0x3be5b7f9cfd44654
        da0[3] = r00(d3, d4, d5, d6, d7, d0, d1, d2, rr_3, table_f)
        da0[4] = r00(d4, d5, d6, d7, d0, d1, d2, d3, rr_4, table_f)
        da0[5] = r00(d5, d6, d7, d0, d1, d2, d3, d4, rr_5, table_f)
        da0[6] = r00(d6, d7, d0, d1, d2, d3, d4, d5, rr_6, table_f)
        da0[7] = r00(d7, d0, d1, d2, d3, d4, d5, d6, rr_7, table_f)

        ha0[0], ha0[1], ha0[2], ha0[3], ha0[4], ha0[5], ha0[6], ha0[7] = rr_0, rr_1, rr_2, rr_3, rr_4, rr_5, rr_6, rr_7

    if typ is None:
        src[0] = da0[0] ^ src_xor[0] ^ src[0]
        src[1] = da0[7] ^ src_xor[1] ^ src[1]
        src[2] = da0[6] ^ src_xor[2] ^ src[2]
        src[3] = da0[5] ^ src_xor[3] ^ src[3]
        src[4] = da0[4] ^ src_xor[4] ^ src[4]
        src[5] = da0[3] ^ src_xor[5] ^ src[5]
        src[6] = da0[2] ^ src_xor[6] ^ src[6]
        src[7] = da0[1] ^ src_xor[7] ^ src[7]
    else:
        src[0] = da0[7] ^ typ[1]
        src[1] = da0[6] ^ typ[2]
        src[2] = da0[5] ^ typ[3]
        src[3] = da0[4] ^ typ[4]
        src[4] = da0[3] ^ typ[5]
        src[5] = da0[2] ^ typ[6]
        src[6] = da0[1] ^ typ[7] ^ src[7]
        src[7] = da0[0] ^ typ[0]
    return src

def branch_1(iv_v0, khronos, query_sm3, body_md5_bytes, ts_bytes):
    tt1 = [0x808a9c79, 0xf079807e, 0xbadf79c5, 0xa785d3ff, 0x82d8438c]
    iv_v1 = tt1[iv_v0]

    c_v1 = (iv_v1 + khronos) & 0xff
    c_v1 = ror(khronos, c_v1)

    orders = bytes.fromhex('''05 07 01 02 04 00 06 03 00 05 02 04 01 03 07 06
    05 07 02 04 01 06 03 00 03 00 02 04 06 07 01 05
    04 05 00 03 06 02 01 07 00 00 00 00 00 00 00 00''')

    order1 = orders[iv_v0 * 8:iv_v0 * 8 + 8]

    iv_v1 = (iv_v1 + khronos + 1) & 63
    tt1 = [0x87aeea5dab37cd6b, 0x7ff48becb4f54087, 0xb0724c06706bbd5d, 0x1fe5dfb1143e328d,
           0x1a2331d00af4f1f2, 0xcaff7131bb1e71ba, 0x33385e1042752218, 0xff01ed65d4a441fb,
           0xadb1ec8828c80e8, 0x62475d12f4e06fe7, 0xbd0b238da4fe72]

    tt2 = [0] * 11
    for i in range(0, 11):
        tt2[i] = ror(tt1[i], iv_v1)

    to_sign = bytearray(query_sm3 + body_md5_bytes + ts_bytes + bytes([0x80, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0]))

    src = [0] * (len(to_sign) // 8)
    for i in range(len(to_sign) // 8):
        src[i] = int.from_bytes(to_sign[i * 8:i * 8 + 8], 'big')

    src_xor = [c_v1, c_v1, c_v1, c_v1, c_v1, c_v1, c_v1, c_v1]

    table_f = get_branch_1_table_f(iv_v0)
    swap = swap_v0(src, src_xor, tt2, table_f, order1)
    data = [0] * 8
    data[7] = 416

    src_xor = [swap[4], swap[3], swap[2], swap[1], swap[0], swap[7], swap[6], swap[5]]
    swap = swap_v0(data, src_xor, tt2, table_f, order1, swap)

    ret = bytearray(32)
    n = 0
    for i in range(7, -1, -1):
        pp = swap[i].to_bytes(8, "little")
        ret[n + 0], ret[n + 1], ret[n + 2], ret[n + 3] = pp[1], pp[3], pp[5], pp[6]
        n += 4

    for i in range(16):
        ret[i] ^= ret[i + 16]
    ret = ret[:16]
    sum = sum_md5(ret)
    ret += sum.to_bytes(4, "little")
    return ret

def r00(r0, r1, r2, r3, r4, r5, r6, r7, tt, table_f, v=0):
    x = table_f(8 * (r0 >> 56))
    r1 = (r1 >> 45) & 2040

    if tt > 0:
        x = x ^ tt
    x = x ^ table_f(r1 + 2048)

    r2 = (r2 >> 37) & 2040
    x = x ^ table_f(r2 + 4096)

    r3 = (r3 >> 29) & 2040
    x = x ^ table_f(r3 + 6144)

    r4 = (r4 >> 21) & 2040
    x = x ^ table_f(r4 + 8192)

    r5 = (r5 >> 13) & 2040
    x = x ^ table_f(r5 + 10240)

    r6 = (r6 >> 8) & 255
    x = x ^ table_f(8 * r6 + 12288)

    r7 = r7 & 255
    x = x ^ table_f(8 * r7 + 14336)

    return x

branch_2_orders = bytes.fromhex('''
    0f 07 04 00 09 08 03 0a 06 0b 05 0d 0e 01 0c 02 0f 05 08 0c 00 09 02 01 03 07 0e 06 0b 0a 0d 04 06 05 00 07 0c 00 0a 04 08 0f 01 0b 0d 09 02 0e 06 0b 02 05 04 03 08 01 01 07 0a 00 0d 0c 09 0e
    0d 07 0e 0f 0b 02 08 03 0c 05 09 01 00 04 06 0a 0d 09 02 06 0f 0b 0a 04 08 07 00 0c 05 03 01 0e 0c 09 0f 07 06 0f 03 0e 02 0d 04 05 01 0b 0a 00 0c 05 0a 09 0e 08 02 04 04 07 03 0f 01 06 0b 00
    0b 0f 04 08 02 0a 07 00 09 0d 06 01 0e 03 05 0c 0b 06 0a 05 08 02 0c 03 07 0f 0e 09 0d 00 01 04 09 06 08 0f 05 08 00 04 0a 0b 03 0d 01 02 0c 0e 09 0d 0c 06 04 07 0a 03 03 0f 00 08 01 05 02 0e
    01 00 0d 0f 09 0a 0b 0e 04 02 08 07 03 06 0c 05 01 08 0a 0c 0f 09 05 06 0b 00 03 04 02 0e 07 0d 04 08 0f 00 0c 0f 0e 0d 0a 01 06 02 07 09 05 03 04 02 05 08 0d 0b 0a 06 06 00 0e 0f 07 0c 09 03
    0a 08 04 0f 00 0b 01 06 0d 0c 07 09 03 0e 05 02 0a 07 0b 05 0f 00 02 0e 01 08 03 0d 0c 06 09 04 0d 07 0f 08 05 0f 06 04 0b 0a 0e 0c 09 00 02 03 0d 0c 02 07 04 01 0b 0e 0e 08 06 0f 09 05 00 03
    ''')

def branch_2(iv, khronos, query_sm3, body_md5_bytes, ts_bytes):
    n0 = (iv & 15 - 2) * 86
    iv_v0 = (n0 >> 15 & 0xff) + (n0 >> 8 & 0xff)

    t001 = [0x8980f29b, 0xeb549c7f, 0xb08726db, 0xd40cb5e6, 0xe8f559e4]

    n1 = t001[iv_v0]
    count_v1 = (n1 + khronos + 1) & 0xff
    count_v2 = (n1 + khronos) & 0xffffffff

    n0 = (count_v2 + 5) & 7

    pad = bytearray(8)
    seed = bytes([0x84, 0x96, 0x77, 0x9d, 0xd4, 0x15, 0x0b, 0xf8])
    for i in range(8):
        v = int.from_bytes(bytes([seed[i], seed[i]]), 'little')
        v = v >> n0
        pad[i] = v & 0xff

    data = query_sm3 + body_md5_bytes + ts_bytes + pad + bytes.fromhex('a0 01 00 00')

    idx = iv_v0 << 6
    ret = md5sum_v3(data, count_v2, branch_2_orders[idx:idx + 64], count_v1)

    return ret

def branch0_xor(data, base, di, tt03, round, x1, x2, x3, x4, x5, x6, x7, x8, x9, x10):
    d = data[:]

    for i in range(round):
        offset = base + i
        n0 = di[offset & 127]

        n1 = ((d[x3] ^ d[x4]) & d[x1]) ^ d[x3]

        n2 = rol(d[x1], 26) ^ rol(d[x1], 21) ^ rol(d[x1], 7)
        offset = offset & 63
        n3 = tt03[offset]

        n4 = (n0 + n1 + n2 + n3 + d[x5]) & 0xffffffff

        n5 = rol(d[x2], 30) ^ rol(d[x2], 19) ^ rol(d[x2], 10)
        n6 = (d[x2] & d[x6]) | ((d[x2] | d[x6]) & d[x7])
        n7 = n5 + n6

        o = d[x9]
        d[0], d[1], d[2], d[3], d[4], d[5], d[6], d[7] = d[7], d[0], d[1], d[2], d[3], d[4], d[5], d[6]
        d[x10] = (n7 + n4) & 0xffffffff
        d[x8] = (o + n4) & 0xffffffff
    return d

branch_1_table = None

def get_branch_1_table_f(iv_v0):
    global branch_1_table
    if branch_1_table is None:
        branch_1_table = _branch_one_bytes()

    table = branch_1_table[iv_v0 << 14:]
    def table_f(x):
        return int.from_bytes(table[x:x + 8], 'little')
    return table_f

def _varint(value: int) -> bytes:
    value = int(value)
    if value < 0:
        value &= (1 << 64) - 1
    result = bytearray()
    while value > 0x7F:
        result.append((value & 0x7F) | 0x80)
        value >>= 7
    result.append(value)
    return bytes(result)

def _sint(value: int, bits: int) -> int:
    # 正式 protobuf 编码规则：正数不先截断到有符号范围；
    # 这对 Medusa.rand 等可能大于 2**31 的 sint32 字段很重要。
    value = int(value)
    return (value << 1) if value >= 0 else (value << 1) ^ (~0)

def _proto_field(field: int, value: Any, kind: str) -> bytes:
    if value in (None, "", b"", 0, 0.0, False):
        return b""
    if kind == "sint32":
        return _varint((field << 3) | 0) + _varint(_sint(int(value), 32))
    if kind == "sint64":
        return _varint((field << 3) | 0) + _varint(_sint(int(value), 64))
    if kind == "float":
        return _varint((field << 3) | 5) + struct.pack("<f", float(value))
    if kind == "bytes":
        raw = bytes(value)
    elif kind == "string":
        raw = str(value).encode("utf-8")
    elif kind == "message":
        raw = bytes(value)
    else:
        raise ValueError(f"unknown protobuf field kind: {kind}")
    return _varint((field << 3) | 2) + _varint(len(raw)) + raw

def _proto(fields: list[tuple[int, Any, str]]) -> bytes:
    return b"".join(_proto_field(field, value, kind) for field, value, kind in fields)

def _encode_request() -> bytes:
    return _proto([
        (1, 111, "sint32"),
        (2, 10, "sint32"),
        (3, 694367, "sint32"),
        (5, 586952199, "sint32"),
    ])

def _encode_device(device: Mapping[str, Any]) -> bytes:
    fields = [
        (1, device.get("d1"), "sint32"), (2, device.get("collect_stat"), "sint32"),
        (3, device.get("aid"), "string"), (4, device.get("device_id"), "string"),
        (5, device.get("sec_device_token"), "string"), (6, device.get("app_version"), "string"),
        (7, device.get("battery"), "sint32"), (8, device.get("battery2"), "sint32"),
        (9, device.get("battery_health"), "sint32"), (10, device.get("battery_changed"), "sint32"),
        (11, device.get("network"), "string"), (12, device.get("tz"), "string"),
        (13, device.get("lan"), "string"), (14, device.get("cpu"), "sint32"),
        (15, device.get("resolution"), "string"), (16, device.get("sdcard"), "float"),
        (17, device.get("sdcard_used"), "float"), (18, device.get("memory"), "float"),
        (19, device.get("memory2"), "float"), (20, device.get("data"), "float"),
        (21, device.get("data_used"), "float"), (22, device.get("os_version"), "string"),
        (23, device.get("brightness"), "sint32"), (24, device.get("volume"), "sint32"),
        (25, device.get("ts"), "sint64"), (26, device.get("ts2"), "sint64"),
        (27, device.get("ts3"), "sint64"), (28, device.get("ts4"), "sint64"),
        (29, device.get("usb"), "sint32"), (30, device.get("hw_version"), "string"),
        (31, device.get("brand"), "string"), (32, device.get("board"), "string"),
        (33, device.get("product_name"), "string"), (34, device.get("product_device"), "string"),
        (35, device.get("product_manufacturer"), "string"), (36, device.get("hardware"), "string"),
        (38, device.get("unknown38"), "sint32"), (40, device.get("unknown40"), "sint32"),
    ]
    return _proto(fields)

def _encode_env(env: Mapping[str, Any]) -> bytes:
    fields = [
        (1, env.get("launch_time"), "sint32"), (2, env.get("unknown2"), "sint32"),
        (3, env.get("unknown3"), "sint32"), (5, env.get("unknown5"), "sint32"),
        (6, env.get("version"), "string"), (7, env.get("pid"), "sint32"),
        (12, _encode_device(env.get("device") or {}), "message"),
        (13, _proto([
            (1, (env.get("report") or {}).get("time"), "sint64"),
            (2, (env.get("report") or {}).get("state"), "sint32"),
            (4, (env.get("report") or {}).get("code"), "sint32"),
            (5, (env.get("report") or {}).get("times"), "sint32"),
            (6, (env.get("report") or {}).get("unknown6"), "sint32"),
        ]), "message"),
        (14, env.get("app_version"), "string"),
        (15, env.get("unknown15"), "sint32"), (16, env.get("unknown16"), "sint32"),
        (18, env.get("unknown18"), "sint32"), (19, env.get("unknown19"), "sint32"),
        (20, env.get("unknown20"), "sint32"), (21, env.get("unknown21"), "sint32"),
    ]
    return _proto(fields)

def _encode_medusa(values: Mapping[str, Any]) -> bytes:
    return _proto([
        (1, values.get("magic"), "bytes"), (2, values.get("version"), "sint32"),
        (3, values.get("rand"), "sint32"), (4, values.get("ms_app_id"), "string"),
        (5, values.get("device_id"), "string"), (6, values.get("license_id"), "string"),
        (7, values.get("app_version"), "string"), (8, values.get("sdk_version_str"), "string"),
        (9, values.get("sdk_version"), "sint32"), (10, values.get("xg_seed_bytes"), "bytes"),
        (12, values.get("time"), "sint32"), (13, values.get("query_body_ts_hash"), "bytes"),
        (14, values.get("query_sm3"), "bytes"), (15, _encode_request(), "message"),
        (16, values.get("sec_device_token"), "string"), (17, values.get("time2"), "sint32"),
        (18, values.get("lanusk_hash"), "bytes"), (19, values.get("query_body_hash_sm3"), "bytes"),
        (20, values.get("psk_version"), "string"), (21, values.get("call_type"), "sint32"),
        (23, _encode_env(values.get("env") or {}), "message"),
        (24, values.get("unknown24"), "string"), (26, values.get("original"), "string"),
    ])

def _json_body_md5(data: Any, data_type: str | None = None) -> str:
    if not data:
        return ""
    if isinstance(data, str):
        raw = data.encode("utf-8")
    elif isinstance(data, bytes):
        raw = data
    elif data_type == "application/json; charset=UTF-8":
        raw = json.dumps(data, ensure_ascii=False, separators=(",", ":")).encode("utf-8")
    else:
        raw = urlencode(data).encode("utf-8")
    return hashlib.md5(raw).hexdigest().upper()

def _url_encode(value: Mapping[str, Any]) -> str:
    return urlencode(value).replace("+", "%20").replace("%2A", "*")

def _get_params_encrypturl(url: str, params: Mapping[str, Any], devices: Mapping[str, Any]) -> tuple[str, dict[str, Any]]:
    result = dict(params)
    for key, value in devices.items():
        if key in result:
            result[key] = value
        elif key == "device_id" and "did" in result:
            result["did"] = value
    result["ts"] = int(time.time())
    result["_rticket"] = int(time.time() * 1000)
    return url.split("?", 1)[0] + "?" + _url_encode(result), result

def _xg_rc4(data: bytes, key: bytes) -> bytearray:
    table = list(range(256))
    j = 0
    for i in range(256):
        j = (j + table[i] + key[i % len(key)]) % 256
        table[i] = table[j]
    i = j = 0
    result = bytearray(len(data))
    for index, value in enumerate(data):
        i = (i + 1) & 0xFF
        x = table[i]
        j = (j + x) & 0xFF
        y = table[j]
        # 保持正式基线的 RC4 变体：这里只覆盖 S[i]，不交换 S[j]。
        table[i] = y
        result[index] = value ^ table[(y + y) & 0xFF]
    return result

def _reverse_bits(value: int) -> int:
    return int(f"{value:08b}"[::-1], 2)

def _encrypt_gorgon(body: Any, query: str, khronos: int, xg_rand: int, data_type: str) -> str:
    body_md5 = _json_body_md5(body, data_type).lower() if body else ""
    data = bytearray(hashlib.md5(query.encode()).digest()[:4])
    data += bytes.fromhex(body_md5)[:4] if body_md5 else b"\0\0\0\0"
    data += b"\0\0\0\0" + (67503104).to_bytes(4, "little") + khronos.to_bytes(4, "big")
    key = bytes((0x4A, 320 & 0xFF, 0x16, (xg_rand >> 8) & 0xFF, 0x47, 0x6C, 1, xg_rand & 0xFF))
    result = _xg_rc4(data, key)
    for index, value in enumerate(result):
        value = ((value >> 4) | (value << 4)) & 0xFF
        following = result[index + 1] if index + 1 < len(result) else result[0]
        result[index] = (~(_reverse_bits(following ^ value) ^ 20)) & 0xFF
    return (b"\x84\x04" + xg_rand.to_bytes(2, "little") + (320).to_bytes(2, "little") + result).hex()

def _ror64(value: int, count: int) -> int:
    count %= 64
    return ((value >> count) | (value << (64 - count))) & 0xFFFFFFFFFFFFFFFF

def _encrypt_helios(khronos: int, rand_value: int = 0) -> str:
    value = rand_value or random.randint(0, 0xFFFFFFFF)
    seed = value.to_bytes(4, "little") + b"8662"
    digest = hashlib.md5(seed).digest()
    keys = b"".join(f"{item:02x}".encode() for item in digest)
    table = [int.from_bytes(keys[:8], "little")]
    words = [int.from_bytes(keys[i:i + 8], "little") for i in range(0, 32, 8)]
    first, second = words[0], words[1]
    words = words[2:]
    for index in range(0x22):
        value2 = _ror64(second, 8)
        value2 = (value2 + first) & 0xFFFFFFFFFFFFFFFF
        value2 = (value2 ^ index) & 0xFFFFFFFFFFFFFFFF
        words.append(value2)
        value2 ^= _ror64(first, 61)
        value2 &= 0xFFFFFFFFFFFFFFFF
        table.append(value2)
        first, second = value2, words.pop(0)
    raw = (f"{khronos}-1588093228-8662").encode()
    pad = 16 - len(raw) % 16
    raw += bytes([pad]) * pad
    output = bytearray()
    for offset in range(0, len(raw), 16):
        left = int.from_bytes(raw[offset:offset + 8], "little")
        right = int.from_bytes(raw[offset + 8:offset + 16], "little")
        for index in range(0x22):
            right = (table[index] ^ (left + _ror64(right, 8))) & 0xFFFFFFFFFFFFFFFF
            left = (right ^ _ror64(left, 61)) & 0xFFFFFFFFFFFFFFFF
        output += left.to_bytes(8, "little") + right.to_bytes(8, "little")
    return base64.b64encode(value.to_bytes(4, "little") + output).decode()

def _gen_medusa_proto(url: str, url_params: Mapping[str, Any], devices: Mapping[str, Any], data: Any, khronos: int, data_type: str) -> tuple[bytes, bytes, bytes]:
    body_md5 = _json_body_md5(data, data_type).lower() if data else ""
    body_md5_bytes = bytes.fromhex(body_md5) if body_md5 else bytes(16)
    ts_bytes = khronos.to_bytes(4, "little")
    query = url.split("?", 1)[1] if "?" in url else ""
    query_sm3 = SM3(query).digest()
    query_body_hash = SM3(query.encode() + body_md5_bytes + b"none").digest()
    device_id = str(devices.get("device_id", url_params.get("device_id", url_params.get("did", ""))))
    version_name = str(devices.get("version_name", url_params.get("version_name", "7.1.3.32")))
    device_model = str(devices.get("device_model", url_params.get("device_type", "")))
    brand = str(devices.get("device_brand", url_params.get("device_brand", "")))
    sec_device_token = str(devices.get("sec_device_token") or "")
    device_sec_device_token = str(devices.get("device_sec_device_token") or "")
    proto_rand = random.randint(0, 0xFFFFFFFF)
    launch_time = random.randint(100, 120)
    process_id = random.randint(10001, 12000)
    # 这些字段是正式签名实现中的固定环境采样值，不是用户设备标识。
    report_ts = 1728388016635
    report_time = int(time.time())
    device = {
        "d1": 1, "collect_stat": 2, "aid": "8662", "device_id": device_id,
        "sec_device_token": device_sec_device_token,
        "app_version": "!noperm!", "battery": -888888, "battery2": -888888,
        "battery_health": 3, "battery_changed": -888888, "network": "!notset!",
        "tz": "Asia/Shanghai,8", "lan": "zh_CN", "cpu": 4,
        "sdcard": 255.24993896484375, "sdcard_used": 35.58599090576172,
        "memory": 3.467449188232422, "memory2": 3.467449188232422,
        "data": 255.1754913330078, "data_used": 42.17544174194336,
        "os_version": str(devices.get("os_version", url_params.get("os_version", ""))),
        "brightness": 41, "volume": 36, "ts": report_ts, "ts2": report_ts,
        "ts3": report_ts, "ts4": report_ts + 2, "usb": -1, "hw_version": device_model,
        "brand": brand, "board": device_model, "product_name": device_model,
        "product_device": str(devices.get("device_manufacturer", brand)),
        "product_manufacturer": brand, "hardware": brand, "unknown38": 31,
    }
    env = {
        "launch_time": launch_time, "unknown2": 146331399,
        "unknown3": 146331396, "unknown5": 7, "version": "v04.06.04.03-bugfix",
        "pid": process_id, "device": device,
        "report": {"time": report_time, "state": -2, "code": 200, "times": 0, "unknown6": 0},
        "app_version": version_name,
    }
    values = {
        "magic": b"\xf7\xe8_\xfa\xd7\xd7\xdc;\xd6*\xc8pW\xcfa\x18",
        "version": 3, "rand": proto_rand, "ms_app_id": "8662",
        "device_id": device_id, "license_id": "1588093228", "app_version": version_name,
        "sdk_version_str": "v04.06.04-ml-android", "sdk_version": 67503104,
        "xg_seed_bytes": (320).to_bytes(8, "little"), "time": khronos,
        "query_body_ts_hash": hash_f13(query_sm3, body_md5_bytes, ts_bytes, khronos),
        "query_sm3": query_sm3[:6], "sec_device_token": sec_device_token, "time2": khronos,
        "lanusk_hash": b"", "query_body_hash_sm3": query_body_hash, "psk_version": "none",
        "call_type": 312, "env": env,
        "unknown24": '{"cmr":16777216,"cmr2":16777216,"un_h":1879194040,"vpn":0,"kd":0,"fkd":3672518972,"pd":-1872573247,"dyn":"","do":0,"tk":true}',
    }
    return _encode_medusa(values), query_sm3, hash_f13(query_sm3, body_md5_bytes, ts_bytes, khronos)

def _xmxor_two(data: bytes, key: bytes) -> bytearray:
    encoded = bytearray(len(data))
    for index, value in enumerate(data):
        position = (index * 4) & 28
        d0, d1 = key[position], key[position + 1]
        d2 = (rl8(value, 4) + d0) ^ d1
        d2 = rl8((~d2) & 0xFF, 3)
        d2 = ((d2 + d1) & 0xFF) ^ d0
        encoded[-index - 1] = (~d2) & 0xFF
    return encoded

def _xmxor(data: bytes, key: bytes) -> bytearray:
    value = _xmxor_two(data, key)
    last_flag = value[-1] ^ value[-2]
    data0 = value[0]
    value[0] = (~last_flag + value[0]) & 0xFF
    value[1] = ((value[0] ^ value[-1] ^ 254) + value[1]) & 0xFF
    value[2] = (value[2] + ((last_flag - data0) ^ rl8(value[1], 3) ^ 2)) & 0xFF
    for index in range(len(value) - 4):
        temp = rl8(value[index + 2], 3) ^ value[index + 1] ^ (index + 3)
        value[index + 3] = (~temp + value[index + 3]) & 0xFF
    value[-1] ^= value[-2]
    value[0] = ((value[0] ^ value[1]) + sum(value[1:])) & 0xFF
    return value

def _gen_medusa(url: str, url_params: Mapping[str, Any], devices: Mapping[str, Any], data: Any, khronos: int, data_type: str) -> str:
    config_key = b"\xf1Y3vvn\xa9\x8d4\xf3\x1b\x05z\x9d[\xe4"
    config_iv = b"\x1f\xe1\t\xa4\x12R\x83\xf4\x18\xde\x9e\x05\x1a\x96\x9e\x12"
    sign_key = b"\x8e\xbd\xfa8\x06\xec\xc5\xce\xe7\x94#\xe6\x02\x9e\xd8%@\xbc\"\x18\xbb~\xae\xf7\x1c\xb6\x91\xf7\xaa\x8a\xa2\xf5"
    proto, query_sm3, body_sm3 = _gen_medusa_proto(url, url_params, devices, data, khronos, data_type)
    hash_rand = random.randint(0, 0xFFFFFFFF)
    xm_rand = random.randint(0, 0xFFFFFFFF)
    key, seed = get_key_hash(sign_key, hash_rand)
    mixed = _xmxor(proto, key)
    mixed = (320).to_bytes(8, "little") + mixed
    mixed = bytearray(mixed[::-1])
    for index in range(len(mixed)):
        mixed[index] ^= seed[~index & 3]
    hash_bytes = hash_rand.to_bytes(4, "little")
    check_bit = ((query_sm3[0] & 63) << 14) | 0x18000001 | ((body_sm3[0] & 63) << 8)
    mixed = b"\x35" + xm_rand.to_bytes(4, "little") + check_bit.to_bytes(4, "little") + mixed + hash_bytes[2:]
    mixed = AES_V3(config_key, khronos).encrypt(mixed, config_iv)
    version = bytes.fromhex("03 00 00 00 f7 e8 5f fa d7 d7 dc 3b d6 2a c8 70 57 cf 61 18")
    version_or = b"".join((int.from_bytes(version[i:i + 4], "little") ^ khronos).to_bytes(4, "little") for i in range(0, 20, 4))
    return base64.b64encode(version_or + hash_bytes[:2] + (256).to_bytes(2, "little") + mixed).decode()

def _core_sixgod(url: str, params: Mapping[str, Any], devices: Mapping[str, Any], data: Any, header: Mapping[str, Any]) -> tuple[dict[str, str], str]:
    data_type = str(header.get("content-type", header.get("Content-Type", "")))
    xg_rand = random.randint(0, 0xFFFF)
    encrypted_url, url_params = _get_params_encrypturl(url, params, devices)
    khronos = int(time.time())
    encoded_query = _url_encode(url_params)
    values = {
        "khronos": str(khronos),
        "ladon": base64.b64encode(khronos.to_bytes(4, "big")).decode(),
        "argus": base64.b64encode(khronos.to_bytes(4, "little")).decode(),
        "gorgon": _encrypt_gorgon(data, encoded_query, khronos, xg_rand, data_type),
        "helios": _encrypt_helios(khronos, 0),
        "medusa": _gen_medusa(encrypted_url, url_params, devices, data, khronos, data_type),
    }
    signs = {
        "x-ladon": values["ladon"], "x-khronos": values["khronos"],
        "x-argus": values["argus"], "x-gorgon": values["gorgon"],
        "x-helios": values["helios"], "x-medusa": values["medusa"],
    }
    if data:
        signs["x-ss-stub"] = _json_body_md5(data, data_type)
    result_headers = {str(key).lower(): str(value) for key, value in header.items()}
    result_headers.update(signs)
    if devices.get("ua"):
        result_headers["user-agent"] = str(devices["ua"])
    result_headers["x-tt-dt"] = str(devices.get("x_tt_dt", ""))
    return result_headers, encrypted_url

def _device_config(config: Mapping[str, Any]) -> dict[str, str]:
    device_id = _text(config.get("device_id"))
    install_id = _text(config.get("install_id"))
    if not device_id or not install_id:
        raise HongguoPluginError("缺少红果 device_id/install_id 配置")
    return {
        "device_id": device_id, "iid": install_id, "install_id": install_id,
        "device_brand": "Redmi", "device_model": "25053RT47C", "device_type": "25053RT47C",
        "device_manufacturer": "Xiaomi", "os_version": "16", "version_name": "7.1.3.32",
        "x_tt_dt": _text(config.get("x_tt_dt")),
        "sec_device_token": _text(config.get("sec_device_token")),
        "device_sec_device_token": _text(config.get("device_sec_device_token")),
        "ua": APP_UA,
    }


# multi_video_model 对 device_id 是一次性消费：一组设备号只认一次签名请求，
# 第二次起就固定返回 {"Code":110001,"Message":"未知异常"}。旧实现整个源共用一个
# 随机 device_id，所以实际只有"本次会话里第一次播放的那一集"能出画面，之后每一集、
# 每一条线路都失败。这里改成每次签名换一组全新随机设备号。
_VIDEO_MODEL_ATTEMPTS = 6
_HG_MODEL_TTL = 1800
_HG_MODEL_CACHE: dict[str, Any] = {}
_HG_MODEL_LOCK = threading.RLock()


def _new_device_pair() -> dict[str, str]:
    return {
        "device_id": str(random.randint(10**17, 10**18 - 1)),
        "install_id": str(random.randint(10**17, 10**18 - 1)),
    }


def _hg_model_cache_get(video_id: str) -> Any:
    with _HG_MODEL_LOCK:
        item = _HG_MODEL_CACHE.get(video_id)
        if not item:
            return None
        stamp, model = item
        if time.time() - stamp > _HG_MODEL_TTL:
            _HG_MODEL_CACHE.pop(video_id, None)
            return None
        return model


def _hg_model_cache_put(video_id: str, model: Any) -> None:
    with _HG_MODEL_LOCK:
        if len(_HG_MODEL_CACHE) > 32:
            for key in sorted(_HG_MODEL_CACHE, key=lambda k: _HG_MODEL_CACHE[k][0])[:16]:
                _HG_MODEL_CACHE.pop(key, None)
        _HG_MODEL_CACHE[video_id] = (time.time(), model)


def _video_model(video_id: str, config: Mapping[str, Any]) -> dict[str, Any]:
    """拉播放模型。带进程内缓存 + 换设备号重试，绕开上游一次性 device_id 与抖动。"""
    cached = _hg_model_cache_get(_text(video_id))
    if cached is not None:
        return cached
    carry = {
        "x_tt_dt": config.get("x_tt_dt"),
        "sec_device_token": config.get("sec_device_token"),
        "device_sec_device_token": config.get("device_sec_device_token"),
    }
    last: Exception | None = None
    attempts = max(1, int(_VIDEO_MODEL_ATTEMPTS))
    for attempt in range(attempts):
        seed = _new_device_pair()
        for key, value in carry.items():
            if value:
                seed[key] = value
        try:
            model = _video_model_once(video_id, _device_config(seed))
        except Exception as error:  # 上游 110001 / 101000 抖动
            last = error
            if attempt + 1 < attempts:
                time.sleep(0.2 * (attempt + 1))
            continue
        _hg_model_cache_put(_text(video_id), model)
        return model
    raise HongguoPluginError("播放模型获取失败: %s" % last)


def _video_model_once(video_id: str, devices: Mapping[str, str]) -> dict[str, Any]:
    params = {
        "iid": devices["install_id"],
        "device_id": devices["device_id"],
        "ac": "wifi",
        "channel": "update_64",
        "aid": "8662",
        "app_name": "novelread",
        "version_code": "71332",
        "version_name": "7.1.3.32",
        "device_platform": "android",
        "os": "android",
        "ssmix": "a",
        "device_type": "25053RT47C",
        "device_brand": "Redmi",
        "language": "zh",
        "os_api": "36",
        "os_version": "16",
        "manifest_version_code": "71332",
        "resolution": "1280*2772",
        "dpi": "520",
        "update_version_code": "71332",
        "host_abi": "arm64-v8a",
        "dragon_device_type": "phone",
        "pv_player": "71332",
        "compliance_status": "0",
        "need_personal_recommend": "1",
        "player_so_load": "1",
        "is_android_pad_screen": "0",
    }
    payload = {
        "biz_param": {
            "detail_page_version": 0,
            "device_level": 3,
            "disable_digg_stat": False,
            "need_all_video_definition": True,
            "need_mp4_align": False,
            "use_os_player": False,
            "use_server_dns": False,
            "video_platform": 1024,
        },
        "mixed_video_id_map": {"1004": [video_id]},
    }
    request_headers = {
        "User-Agent": APP_UA,
        "Accept": "application/json; charset=utf-8,application/x-protobuf",
        "Content-Type": "application/json; charset=UTF-8",
        "x-xs-from-web": "0",
        "x-ss-req-ticket": str(int(time.time() * 1000)),
        "x-tt-request-tag": "t=0;n=0",
        "sdk-version": "2",
        "passport-sdk-version": "50561",
        "x-vc-bdturing-sdk-version": "3.7.2.cn",
    }
    if devices.get("cookie"):
        request_headers["Cookie"] = devices["cookie"]
    signed_headers, signed_url = _core_sixgod(
        VIDEO_URL,
        params,
        devices,
        payload,
        request_headers,
    )
    body = json.dumps(payload, ensure_ascii=False, separators=(",", ":")).encode("utf-8")
    response = requests.post(
        signed_url,
        headers=signed_headers,
        data=body,
        timeout=30,
    )
    response_data = _json_response(response)
    data = response_data.get("data") or {}
    if not isinstance(data, Mapping):
        raise HongguoPluginError("video_model 数据为空")
    entry: Any = data.get(video_id)
    if entry is None:
        for value in data.values():
            if isinstance(value, Mapping):
                entry = value
                break
            if isinstance(value, list) and value and isinstance(value[0], Mapping):
                entry = value[0]
                break
    if not isinstance(entry, Mapping):
        entry = data
    raw_model = entry.get("video_model") if isinstance(entry, Mapping) else None
    if raw_model is None:
        raw_model = data.get("video_model")
    if isinstance(raw_model, str):
        try:
            raw_model = json.loads(raw_model)
        except ValueError as exc:
            raise HongguoPluginError("video_model JSON 无效") from exc
    if not isinstance(raw_model, Mapping):
        raise HongguoPluginError("video_model 为空")
    return dict(raw_model)

def _video_list_from_model(model: Mapping[str, Any]) -> Any:
    for key in ("video_list", "dynamic_video_list"):
        if model.get(key) is not None:
            return model[key]
    dynamic = model.get("dynamic_video")
    if isinstance(dynamic, Mapping):
        for key in ("dynamic_video_list", "video_list", "list"):
            if dynamic.get(key) is not None:
                return dynamic[key]
    video_info = model.get("video_info")
    if isinstance(video_info, Mapping):
        data = video_info.get("data")
        if isinstance(data, Mapping):
            return _video_list_from_model(data)
    data = model.get("data")
    if isinstance(data, Mapping):
        return _video_list_from_model(data)
    return None


_QUALITY_ORDER = ("2160", "1440", "1080", "720", "576", "540", "480", "360")

def _int(value: Any) -> int:
    match = re.search(r"\d+", _text(value))
    return int(match.group()) if match else 0

def _quality(value: Any) -> str:
    text = _text(value).lower()
    match = re.search(r"(2160|1440|1080|720|576|540|480|360)", text)
    return match.group(1) if match else "1080"

def _quality_rows(video_list: Any) -> dict[str, dict[str, Any]]:
    """把播放模型摊平成 {清晰度: 清晰度行}。"""

    def rows_from(value: Any, hinted_quality: str = "") -> list[tuple[str, dict[str, Any]]]:
        if isinstance(value, list):
            result: list[tuple[str, dict[str, Any]]] = []
            for item in value:
                result.extend(rows_from(item, hinted_quality))
            return result
        if not isinstance(value, Mapping):
            return []
        if any(
            key in value
            for key in (
                "main_url",
                "backup_url",
                "backup_url_1",
                "play_addr",
                "spade_a",
                "encrypt_info",
            )
        ):
            return [(hinted_quality, dict(value))]
        result = []
        for key, item in value.items():
            if key in {"dynamic_video", "video_info", "data"} and isinstance(item, Mapping):
                result.extend(rows_from(item, hinted_quality))
                continue
            if key in {"video_list", "dynamic_video_list", "list"}:
                result.extend(rows_from(item, _quality(key)))
                continue
            if isinstance(item, (Mapping, list)):
                result.extend(rows_from(item, _quality(key)))
        return result

    rows: dict[str, dict[str, Any]] = {}
    for hinted_quality, item in rows_from(video_list):
        definition = _quality(
            item.get("definition")
            or item.get("vheight")
            or (item.get("video_meta") or {}).get("definition")
            or hinted_quality
        )
        rows[definition] = item
    if not rows:
        raise HongguoPluginError("播放模型没有清晰度")
    return rows


def _pick_from_rows(rows: Mapping[str, Any], wanted: str = "1080") -> tuple[str, dict[str, Any]]:
    allowed = [q for q in rows if q]
    requested = _quality(wanted)
    order = [requested] + [item for item in _QUALITY_ORDER if item != requested]
    for definition in order:
        if definition in rows:
            return definition, dict(rows[definition])
    definition = max(allowed, key=lambda item: _int(item)) if allowed else requested
    return definition, dict(rows.get(definition) or {})


def _select_quality(video_list: Any, wanted: str = "1080") -> tuple[str, dict[str, Any]]:
    return _pick_from_rows(_quality_rows(video_list), wanted)


# ---- 编码可解码性 ----
# 红果同一集视频会按清晰度给多档，但档位之间的编码并不统一：
#   bytevc1 -> frma=hvc1，真 HEVC，能播；
#   bytevc2 -> frma=bvc2，是字节自有的封闭码流，ffprobe 判为 codec_name=unknown，
#              ExoPlayer/ffmpeg 一律 "Decoder (codec none) not found"，怎么改标签都解不出来。
# 所以必须按 video_meta.codec_type 判一次，把解不了的档位降级到能播的那一档，
# 否则界面上的每一条线路都会"有地址、能解密、但出不了画面"。
_HG_CODEC_FOURCC = {
    "bytevc1": "hvc1", "bvc1": "hvc1", "h265": "hvc1", "hevc": "hvc1",
    "h264": "avc1", "avc": "avc1", "av1": "av01", "vp9": "vp09",
    "bytevc2": "", "bvc2": "", "bytevc": "", "bvc": "",
}
_STANDARD_FOURCC = ("hvc1", "hev1", "avc1", "av01", "vp09", "avc3", "dvh1", "dvhe")


def _hg_codec_fourcc(codec_type: Any) -> str:
    """上游编码名 -> mp4 样本 fourcc；返回空串表示没有任何通用解码器能解。"""
    name = _text(codec_type).lower().replace("_", "").replace("-", "").replace(" ", "")
    if not name:
        return "hvc1"
    if name in _HG_CODEC_FOURCC:
        return _HG_CODEC_FOURCC[name]
    for known in _STANDARD_FOURCC:
        if known == name:
            return known
    for known in _STANDARD_FOURCC:
        if name.startswith(known[:4]):
            return known
    return ""


def _playable_qualities(rows: Mapping[str, Any]) -> dict[str, str]:
    """{清晰度: fourcc}，只保留真能解码的档位。"""
    result: dict[str, str] = {}
    for definition, item in rows.items():
        meta = item.get("video_meta") if isinstance(item, Mapping) else None
        fourcc = _hg_codec_fourcc((meta or {}).get("codec_type"))
        if fourcc:
            result[definition] = fourcc
    if not result and rows:
        # 上游没给 codec_type 时不要误杀：按老规矩全放行
        result = {definition: "hvc1" for definition in rows}
    return result


def _resolve_quality(rows: Mapping[str, Any], wanted: str) -> tuple[str, dict[str, Any]]:
    """把用户选的清晰度落到真正能解码的那一档（优先同档，其次最接近的可用档）。"""
    playable = _playable_qualities(rows)
    if not playable:
        return _pick_from_rows(rows, wanted)
    definition, item = _pick_from_rows(
        {key: rows[key] for key in playable if key in rows}, wanted
    )
    if not item:
        return _pick_from_rows(rows, wanted)
    return definition, item


_HG_LINE_TTL = 1800
_HG_LINE_CACHE: dict[str, tuple[float, list]] = {}
_HG_LINE_LOCK = threading.RLock()


def _hg_series_lines(vids: list, config: Mapping[str, Any]) -> list[tuple[str, str]]:
    """给详情页挑线路。

    只放真能解码的清晰度进去：上游同一集可能 1080 是标准 HEVC、而 360~720 全是
    bytevc2 封闭码流，如果照单全收，界面上 5 条线路点哪条都是黑的。探测只花一次
    请求（结果按剧缓存 30 分钟），探测不上就退回原来的 5 条，保证不添乱。
    """
    fallback = [(quality, name) for quality, name in _HG_QUALITY_LINES]
    probe_vid = _text(vids[0]) if vids else ""
    if not probe_vid.isdigit():
        return fallback
    with _HG_LINE_LOCK:
        item = _HG_LINE_CACHE.get(probe_vid)
        if item and time.time() - item[0] <= _HG_LINE_TTL:
            cached = item[1]
            return list(cached) if cached else fallback
    lines: list[tuple[str, str]] = []
    try:
        model = _video_model(probe_vid, config)
        playable = _playable_qualities(_quality_rows(_video_list_from_model(model)))
        lines = [
            (quality, name)
            for quality, name in _HG_QUALITY_LINES
            if quality in playable
        ] or fallback
    except Exception:
        lines = []
    with _HG_LINE_LOCK:
        if len(_HG_LINE_CACHE) > 64:
            for key in sorted(_HG_LINE_CACHE, key=lambda k: _HG_LINE_CACHE[k][0])[:32]:
                _HG_LINE_CACHE.pop(key, None)
        _HG_LINE_CACHE[probe_vid] = (time.time(), lines)
    return lines or fallback

def _fallback_api_value(value: Any) -> str:
    if isinstance(value, Mapping):
        return _first(
            value.get("fallback_api"),
            value.get("url"),
            value.get("api"),
            value.get("data"),
        )
    if isinstance(value, (list, tuple)):
        for item in value:
            result = _fallback_api_value(item)
            if result:
                return result
        return ""
    text = _text(value)
    if text.startswith("{"):
        try:
            decoded = json.loads(text)
        except ValueError:
            decoded = {}
        if decoded:
            return _fallback_api_value(decoded)
    return text if len(text) > 10 else ""

def _decrypt_spade_url(value: str, key_seed: bytes) -> str:
    raw = _b64(value)
    if len(raw) < 20 or raw[0] != 0xA8 or raw[2:4] != b"\x01\x00":
        raise HongguoPluginError("spade URL 头无效")
    cipher_data = raw[4 : len(raw) - (len(raw) - 4) % 16]
    if not cipher_data:
        raise HongguoPluginError("spade URL 密文为空")
    constants = bytes.fromhex(
        "4dd4c2e6b83162090e52b3c7a6733ba4"
        "1cb2462b829ab58a196b39db57177524"
        "f49baf7f08e8d68d26a72e37c1a95a2f"
        "1f05a51892aef2949732b62a38aadd58"
    )
    first = hashlib.sha512(key_seed).digest()
    second = hashlib.sha512(first + constants).digest()
    plaintext = _aes_cbc_decrypt(second[:16], second[16:32], cipher_data)
    if plaintext:
        padding = plaintext[-1]
        if 1 <= padding <= 16 and padding <= len(plaintext):
            plaintext = plaintext[:-padding]
    return plaintext.rstrip(b"\0").decode("utf-8", errors="replace")

def _parse_ref(value: str, prefix: str) -> str:
    if not value.startswith(prefix):
        raise HongguoPluginError("播放引用无效")
    raw = value[len(prefix) :]
    if not raw or not _VIDEO_ID.fullmatch(raw):
        raise HongguoPluginError("播放引用格式无效")
    return raw

def _key_seed_from_model(model: Mapping[str, Any]) -> bytes:
    value = _text(model.get("key_seed"))
    if value:
        return _b64(value)
    for key in ("dynamic_video", "video_info", "data"):
        nested = model.get(key)
        if isinstance(nested, Mapping):
            result = _key_seed_from_model(nested)
            if result:
                return result
    return b""

# 官网页面是 Next.js SSR，一份 HTML 几百 KB，而且 homeContent / homeVideoContent /
# categoryContent / detailContent 会反复打同一个 URL。原来每次都重新下载（30s 超时 ×3 重试），
# 这就是"首页和分类转半天圈"的来源。这里加一层带 TTL 的进程内页面缓存。
_PAGE_TTL = 600
_PAGE_CACHE_MAX = 64
_PAGE_CACHE: dict[str, tuple[float, str]] = {}
_PAGE_LOCK = threading.RLock()


def _page_cache_get(url: str) -> str:
    with _PAGE_LOCK:
        item = _PAGE_CACHE.get(url)
        if not item:
            return ""
        stamp, html = item
        if time.time() - stamp > _PAGE_TTL:
            _PAGE_CACHE.pop(url, None)
            return ""
        return html


def _page_cache_put(url: str, html: str) -> None:
    with _PAGE_LOCK:
        if len(_PAGE_CACHE) >= _PAGE_CACHE_MAX:
            for key in sorted(_PAGE_CACHE, key=lambda k: _PAGE_CACHE[k][0]):
                _PAGE_CACHE.pop(key, None)
                if len(_PAGE_CACHE) < _PAGE_CACHE_MAX - 8:
                    break
        _PAGE_CACHE[url] = (time.time(), html)


def _page(url):
    cached = _page_cache_get(url)
    if cached:
        return cached
    last_err = None
    for attempt in range(3):
        try:
            r = requests.get(
                url,
                headers={
                    "User-Agent": UA,
                    "Accept-Language": "zh-CN,zh;q=0.9",
                    "Accept": "text/html,application/xhtml+xml;q=0.9,*/*;q=0.8",
                    "Cache-Control": "no-cache",
                },
                timeout=30,
            )
            r.raise_for_status()
            r.encoding = r.encoding or "utf-8"
            if not r.text or "_ROUTER_DATA" not in r.text:
                raise RuntimeError("empty or invalid page")
            _page_cache_put(url, r.text)
            return r.text
        except Exception as err:
            last_err = err
            try:
                time.sleep(0.6 * (attempt + 1))
            except Exception:
                pass
    raise RuntimeError("page fetch failed: %s" % last_err)

_DATA_CACHE: dict[str, tuple[float, Any]] = {}


def _data(url):
    """解析 _ROUTER_DATA。命中缓存时连 JSON 解析都省掉（单页几百 KB，重复解析很吃 CPU）。"""
    now = time.time()
    with _PAGE_LOCK:
        item = _DATA_CACHE.get(url)
        if item and now - item[0] <= _PAGE_TTL:
            return item[1]
        if item:
            _DATA_CACHE.pop(url, None)
    value = _data_uncached(url)
    if value:
        with _PAGE_LOCK:
            if len(_DATA_CACHE) >= _PAGE_CACHE_MAX:
                for key in sorted(_DATA_CACHE, key=lambda k: _DATA_CACHE[k][0]):
                    _DATA_CACHE.pop(key, None)
                    if len(_DATA_CACHE) < _PAGE_CACHE_MAX - 8:
                        break
            _DATA_CACHE[url] = (time.time(), value)
    return value


def _data_uncached(url):
    html = _page(url)
    m = re.search(r"(?:window\.)?_ROUTER_DATA\s*=\s*", html)
    if not m:
        return {}
    try:
        return json.JSONDecoder().raw_decode(html[m.end():])[0]
    except (ValueError, TypeError):
        return {}


def _item(x):
    x = x or {}
    vd = x.get("video_data") if isinstance(x.get("video_data"), dict) else x
    sid = str(
        vd.get("series_id")
        or x.get("series_id")
        or x.get("keyword")
        or vd.get("keyword")
        or ""
    )
    name = str(
        vd.get("series_title")
        or vd.get("series_name")
        or x.get("series_name")
        or x.get("name")
        or "未命名"
    )
    count = vd.get("episode_cnt") or x.get("episode_cnt") or 0
    pic = str(vd.get("series_cover") or x.get("series_cover") or "")
    intro = str(vd.get("series_intro") or x.get("series_intro") or "")
    return {
        "vod_id": sid,
        "vod_name": name,
        "vod_pic": pic,
        "vod_remarks": ("全%s集" % count) if count else "",
        "vod_content": intro,
    }

def _cat_item(x):
    return _item(x)

def _filter_group(key, name, values):
    return {"key": key, "name": name, "value": [{"n": n, "v": v} for n, v in values]}


def _search_loader(key: str) -> dict:
    """拉取搜索页 loaderData，失败重试。"""
    last = {}
    for attempt in range(3):
        try:
            data = _data(SITE + "/search/" + quote(str(key), safe=""))
            page = (data.get("loaderData") or {}).get("search_(keyword)/page") or {}
            if page.get("searchList"):
                return page
            last = page or last
        except Exception:
            pass
        try:
            time.sleep(0.5 * (attempt + 1))
        except Exception:
            pass
    return last


def _search_by_keywords(keywords, page: int) -> dict:
    """多关键词轮换：第 N 页用第 N 个关键词（循环），避免搜索无法翻页。"""
    page = max(1, int(page or 1))
    kws = [k for k in (keywords or []) if k]
    if not kws:
        kws = ["短剧"]
    key = kws[(page - 1) % len(kws)]
    p = _search_loader(key)
    rows = p.get("searchList") or []
    # 去重空 id
    out = []
    seen = set()
    for x in rows:
        it = _item(x)
        vid = str(it.get("vod_id") or "")
        if not vid or vid in seen:
            continue
        seen.add(vid)
        out.append(it)
    # 虚拟页数：关键词数；若站点有 totalCount 也参考
    total = int(p.get("totalCount") or 0)
    pagecount = max(len(kws), (total + 9) // 10 if total else len(kws))
    return {
        "page": page,
        "pagecount": max(1, pagecount),
        "limit": len(out),
        "total": total or len(out) * pagecount,
        "list": out,
    }


def _category_loader(page: int, q: dict) -> dict:
    """分类页带重试；page=1 偶发空列表时多试几次。"""
    page = max(1, int(page or 1))
    q = dict(q or {})
    if page > 1:
        q["page"] = str(page)
    last = {}
    for attempt in range(3):
        try:
            data = _data(SITE + "/category?" + urlencode(q))
            p = (data.get("loaderData") or {}).get("category_$") or (data.get("loaderData") or {}).get("category_page") or {}
            rows = p.get("recommendList") or []
            if rows or page > 1:
                return p
            last = p or last
        except Exception:
            pass
        try:
            time.sleep(0.5 * (attempt + 1))
        except Exception:
            pass
    return last

class Spider(_BaseSpider):
    def __init__(self):
        self.device_id = str(random.randint(10**17, 10**18 - 1))
        self.install_id = str(random.randint(10**17, 10**18 - 1))

    def getName(self):
        return "红果短剧"

    def isVideoFormat(self, url):
        u = str(url or "").lower()
        return (".mp4" in u) or ("video_mp4" in u) or ("m3u8" in u) or ("mime_type=video" in u) or ("qznovelvod" in u)

    def manualVideoCheck(self):
        return False

    def getDependence(self):
        return []

    def download(self, path, url):
        return ""

    def liveContent(self):
        return {}

    def isVPAYard(self, flag):
        return False

    def action(self, action):
        return ""

    def init(self, extend=""):
        # extend 支持 {"stream":0} 或 stream=0：默认走本机 Range 流（快得多），
        # 极少数把 python 插件跑在独立网络栈的壳里改用回退的整集代理。
        global _PREFER_STREAM
        try:
            text = str(extend or "").strip()
            opts = json.loads(text) if text.startswith("{") else {}
            if not isinstance(opts, dict):
                opts = {}
            if not opts:
                for part in re.split(r"[&,\s]+", text):
                    if "=" in part:
                        key, value = part.split("=", 1)
                        opts[key.strip()] = value.strip()
            for key in ("stream", "range_stream", "prefer_stream"):
                if key in opts:
                    # 注意不能用 _text()：JSON 里的数字 0 会被当成空值。
                    raw = str(opts[key]).strip().lower()
                    _PREFER_STREAM = raw not in (
                        "0", "false", "off", "no", "关闭", "none", "disable",
                    )
        except Exception:
            pass
        try:
            _hg_cache_cleanup(False)
        except Exception:
            pass
        return None

    def destroy(self):
        try:
            _hg_cache_cleanup(False)
        except Exception:
            pass

    def homeContent(self, filter):
        class_list = [
            {"type_id": "all", "type_name": "短剧"},
            {"type_id": "ai_comic", "type_name": "AI漫剧"},
            {"type_id": "latest", "type_name": "最新"},
            {"type_id": "hot", "type_name": "最热"},
            {"type_id": "male", "type_name": "男频"},
            {"type_id": "female", "type_name": "女频"},
        ]
        groups = [
            {"key": "topic", "name": "主题", "value": [
                {"n": "全部", "v": ""}, {"n": "现言", "v": "cate_1021"}, {"n": "女性成长", "v": "cate_1048"},
                {"n": "脑洞", "v": "cate_262"}, {"n": "奇幻", "v": "cate_1020"}, {"n": "玄幻", "v": "cate_1019"},
                {"n": "古言", "v": "cate_439"}, {"n": "战神", "v": "cate_1038"}, {"n": "宫斗", "v": "cate_246"},
                {"n": "仙侠", "v": "cate_1013"}, {"n": "权谋", "v": "cate_1047"}, {"n": "种田", "v": "cate_1180"},
                {"n": "年代爱情", "v": "cate_1022"}, {"n": "悬疑", "v": "cate_165"}, {"n": "喜剧", "v": "cate_303"},
                {"n": "青春", "v": "cate_297"}, {"n": "志怪", "v": "cate_1027"}, {"n": "民国爱情", "v": "cate_1025"},
                {"n": "灵异", "v": "cate_751"}, {"n": "家国情怀", "v": "cate_1235"}, {"n": "法律", "v": "cate_1136"},
                {"n": "刑侦", "v": "cate_1148"}, {"n": "抗战", "v": "cate_504"}, {"n": "武侠", "v": "cate_1172"},
                {"n": "民国传奇", "v": "cate_1240"}, {"n": "求生", "v": "cate_1168"}, {"n": "动作", "v": "cate_302"},
                {"n": "科幻", "v": "cate_1092"}, {"n": "恐怖", "v": "cate_1219"}, {"n": "商战", "v": "cate_1225"},
            ]},
            {"key": "background", "name": "背景", "value": [
                {"n": "全部", "v": ""}, {"n": "现代", "v": "cate_757"}, {"n": "都市", "v": "cate_1"},
                {"n": "古代", "v": "cate_758"}, {"n": "乡村", "v": "cate_11"}, {"n": "年代", "v": "cate_79"},
                {"n": "架空", "v": "cate_452"}, {"n": "职场", "v": "cate_127"}, {"n": "民国", "v": "cate_390"},
                {"n": "校园", "v": "cate_4"}, {"n": "宫廷", "v": "cate_1153"}, {"n": "荒岛", "v": "cate_1162"},
            ]},
            {"key": "setting", "name": "设定", "value": [
                {"n": "全部", "v": ""}, {"n": "打脸虐渣", "v": "cate_1051"}, {"n": "大男主", "v": "cate_1207"},
                {"n": "大女主", "v": "cate_760"}, {"n": "马甲", "v": "cate_266"}, {"n": "重生", "v": "cate_36"},
                {"n": "穿越", "v": "cate_37"}, {"n": "系统", "v": "cate_19"}, {"n": "先婚后爱", "v": "cate_265"},
                {"n": "家长里短", "v": "cate_862"}, {"n": "小人物", "v": "cate_1010"}, {"n": "破镜重圆", "v": "cate_475"},
                {"n": "神豪", "v": "cate_20"}, {"n": "豪门", "v": "cate_936"}, {"n": "强者回归", "v": "cate_1045"},
                {"n": "异能", "v": "cate_598"}, {"n": "虐恋", "v": "cate_1008"}, {"n": "传承觉醒", "v": "cate_1007"},
                {"n": "医生", "v": "cate_487"}, {"n": "强强联合", "v": "cate_1049"}, {"n": "赘婿逆袭", "v": "cate_1044"},
                {"n": "甜宠", "v": "cate_96"}, {"n": "娱乐圈", "v": "cate_43"}, {"n": "神医", "v": "cate_26"},
                {"n": "青梅竹马", "v": "cate_387"}, {"n": "姐弟恋", "v": "cate_762"}, {"n": "玄学", "v": "cate_929"},
                {"n": "追妻火葬场", "v": "cate_616"}, {"n": "业界精英", "v": "cate_1293"}, {"n": "一见钟情", "v": "cate_477"},
                {"n": "福宝", "v": "cate_1291"}, {"n": "捞偏门", "v": "cate_1287"}, {"n": "反派主角", "v": "cate_1042"},
                {"n": "萌宠", "v": "cate_428"}, {"n": "双向救赎", "v": "cate_1200"}, {"n": "方言", "v": "cate_1255"},
                {"n": "白月光", "v": "cate_615"}, {"n": "灵魂互换", "v": "cate_831"}, {"n": "病娇", "v": "cate_380"},
                {"n": "暴富", "v": "cate_1191"}, {"n": "黑道", "v": "cate_826"}, {"n": "丧尸", "v": "cate_582"},
                {"n": "特种兵", "v": "cate_375"},
            ]},
            {"key": "time", "name": "时间", "value": [
                {"n": "全部", "v": ""}, {"n": "7天内上新", "v": "1"}, {"n": "14天内上新", "v": "2"},
                {"n": "30天内上新", "v": "3"}, {"n": "90天内上新", "v": "4"},
            ]},
        ]
        filter_dict = {c["type_id"]: groups for c in class_list}
        home_list = []
        try:
            data = _data(SITE + "/")
            page = (data.get("loaderData") or {}).get("page") or {}
            seen = set()
            for sec in (page.get("homeSections") or []):
                for v in (sec.get("video_list") or []):
                    it = _item(v)
                    vid = str(it.get("vod_id") or "")
                    if vid and vid not in seen:
                        seen.add(vid)
                        home_list.append(it)
        except Exception:
            home_list = []
        return {"class": class_list, "filters": filter_dict, "list": home_list[:40]}
    def homeVideoContent(self):
        try:
            data = _data(SITE + "/")
            page = (data.get("loaderData") or {}).get("page") or {}
            out = []
            seen = set()
            for sec in (page.get("homeSections") or []):
                for v in (sec.get("video_list") or []):
                    it = _item(v)
                    vid = str(it.get("vod_id") or "")
                    if vid and vid not in seen:
                        seen.add(vid)
                        out.append(it)
            return {"list": out[:60]}
        except Exception:
            return {"list": []}

    def _query(self, pg, q=None):
        try:
            pg = max(1, int(pg))
        except (TypeError, ValueError):
            pg = 1
        if q is None:
            q = {"tab": "1", "sort_type": "1"}
        return _category_loader(pg, q)
    def categoryContent(self, tid, pg, filter, extend):
        try:
            page = max(1, int(pg))
        except (TypeError, ValueError):
            page = 1
        # 漫剧 / AI漫剧：官网搜索不支持真翻页，多关键词轮换
        if tid in ("comic", "manju", "漫剧"):
            try:
                p = _category_loader(page, {"tab": "2", "sort_type": "1"})
                rows = p.get("recommendList") or []
                if rows:
                    page_data = p.get("pagination") or {}
                    return {
                        "page": page,
                        "pagecount": int(page_data.get("totalPages") or 1),
                        "limit": len(rows),
                        "total": int(page_data.get("total") or len(rows)),
                        "list": [_cat_item(x) for x in rows],
                    }
            except Exception:
                pass
            return _search_by_keywords(_MANJU_KEYWORDS, page)
        if tid in ("ai_comic", "ai_manju", "AI漫剧", "ai漫剧"):
            return _search_by_keywords(_AI_MANJU_KEYWORDS, page)
        q = {"tab": "1", "sort_type": "1"}
        if tid == "latest":
            q["sort_type"] = "2"
        elif tid == "hot":
            q["sort_type"] = "1"
        elif tid == "male":
            q["gender"] = "1"
        elif tid == "female":
            q["gender"] = "2"
        if isinstance(extend, str) and extend:
            try:
                extend = json.loads(extend)
            except Exception:
                extend = {}
        if isinstance(extend, dict):
            for k, v in extend.items():
                if v and str(v) not in ("", "all", "0"):
                    q[k] = str(v)
        p = _category_loader(page, q)
        rows = p.get("recommendList") or []
        page_data = p.get("pagination") or {}
        return {
            "page": page,
            "pagecount": int(page_data.get("totalPages") or 1),
            "limit": len(rows),
            "total": int(page_data.get("total") or len(rows)),
            "list": [_cat_item(x) for x in rows],
        }
    def searchContent(self, key, quick=False, pg="1"):
        try:
            page = max(1, int(pg))
        except (TypeError, ValueError):
            page = 1
        key = str(key or "").strip() or "短剧"
        # AI/漫剧相关搜索也走关键词轮换，提升翻页体验
        low = key.lower()
        if key in ("AI漫剧", "ai漫剧") or "ai漫" in low:
            return _search_by_keywords(_AI_MANJU_KEYWORDS, page)
        if key in ("漫剧", "动漫短剧"):
            return _search_by_keywords(_MANJU_KEYWORDS, page)

        p = _search_loader(key)
        rows = p.get("searchList") or []
        total = int(p.get("totalCount") or len(rows) or 0)
        # 官网搜索基本只有一页有效结果
        return {
            "page": page,
            "pagecount": 1 if not total else max(1, min(10, (total + 9) // 10)),
            "limit": len(rows),
            "total": total or len(rows),
            "list": [_item(x) for x in rows],
        }


    def _hg_config(self):
        return {
            "device_id": self.device_id or "",
            "install_id": self.install_id or "",
        }

    def detailContent(self, ids):
        sid = str(ids[0] if isinstance(ids, (list, tuple)) else ids)
        sid = sid.replace("hg-series-v1:", "")
        p = ((_data(SITE + "/detail?series_id=" + quote(sid, safe="")).get("loaderData") or {}).get("detail_page") or {})
        s = p.get("seriesDetail") or {}
        vids = s.get("vid_list") or []
        actors = [str(x.get("nickname")) for x in (s.get("celebrities") or []) if isinstance(x, dict) and x.get("nickname")]
        lines = _hg_series_lines(vids, self._hg_config())
        play_from = [name for _, name in lines]
        play_url = []
        for q, _name in lines:
            play_url.append(
                "#".join(
                    "第%d集%s%s%s%s" % (i + 1, "$", EPISODE_PREFIX, q + ":", str(v))
                    for i, v in enumerate(vids)
                )
            )
        return {"list": [{"vod_id": sid, "vod_name": str(s.get("series_name") or ""), "vod_pic": str(s.get("series_cover") or ""), "vod_year": "", "vod_area": "", "vod_director": "", "vod_actor": ",".join(actors), "vod_content": str(s.get("series_intro") or ""), "vod_remarks": str(s.get("episode_right_text") or ""), "vod_play_from": "$$$".join(play_from), "vod_play_url": "$$$".join(play_url)}]}
    def playerContent(self, flag, id, vipFlags=None):
        # 从线路名（flag，如“红果超清/红果高清”）与集 token 双路解析清晰度。
        # token 已是 'hg-episode-v1:<q>:<vid>'，flag 用于旧壳只传线路名时兜底。
        token_q, vid = _split_episode_token(id)
        line_q = "1080"
        for name_key, candidate_q in _QUALITY_LINE_NAME_TO_Q.items():
            if name_key in str(flag or ""):
                line_q = candidate_q
                break
        q = line_q if token_q == "1080" and str(flag) else token_q
        q = q if q in _QUALITY_LINE_NAME_TO_Q else "1080"
        if not str(vid).isdigit():
            return {
                "parse": 1,
                "jx": 0,
                "playUrl": "",
                "url": SITE + "/",
                "header": {"User-Agent": UA},
            }
        cfg = self._hg_config()
        # 优先本机 Range 流：边下边解密，首字节快得多，也不会把一整集 24MB 塞进内存。
        # 先把会话预热好（签名 + moov 解析约 0.3~1s），播放器第一个 Range 就能直接出数据。
        port = 0
        if _PREFER_STREAM:
            try:
                port = _start_stream_server()
            except Exception:
                port = 0
        if port:
            try:
                _stream_session(vid, cfg, q)
                query = urlencode({"vid": vid, "q": q, "did": self.device_id or "", "iid": self.install_id or ""})
                return {
                    "parse": 0,
                    "jx": 0,
                    "playUrl": "",
                    "url": "http://127.0.0.1:%d/hg.mp4?%s" % (port, query),
                    "header": {"User-Agent": UA},
                }
            except Exception:
                pass  # 预热失败就退回壳代理整集方案
        # OK影视 / 多数壳：必须走 getProxyUrl（通常已带 do=py），不要覆盖 do
        proxy = ""
        try:
            if hasattr(self, "getProxyUrl"):
                proxy = (self.getProxyUrl() or "").strip()
        except Exception:
            proxy = ""
        if proxy:
            sep = "&" if "?" in proxy else "?"
            # 保留壳自带的 do=py，只追加业务参数与清晰度线路
            url = proxy + sep + urlencode(
                {
                    "vid": vid,
                    "q": q,
                    "hg": "cenc",
                    "did": self.device_id or "",
                    "iid": self.install_id or "",
                }
            )
            return {
                "parse": 0,
                "jx": 0,
                "playUrl": "",
                "url": url,
                "header": {
                    "User-Agent": MEDIA_UA,
                    "Referer": "https://novel.snssdk.com/",
                },
            }
        return {
            "parse": 1,
            "jx": 0,
            "playUrl": "",
            "url": SITE + "/",
            "header": {"User-Agent": UA},
        }


    def proxy(self, param):
        """部分壳调用 proxy 而不是 localProxy。"""
        return self.localProxy(param)

    def localProxy(self, param):
        """壳本地代理：优先读缓存；无原生 AES 时避免一上来就解 1080 整集导致超时失败。"""
        import traceback
        param = param or {}
        vid = str(
            param.get("vid")
            or param.get("id")
            or param.get("mediaId")
            or ""
        ).strip()
        if not vid or not str(vid).isdigit():
            for _key, value in param.items():
                text = str(value or "").strip()
                if text.isdigit() and len(text) >= 10:
                    vid = text
                    break
        if not vid:
            return [400, "text/plain; charset=utf-8", b"missing vid"]

        try:
            cfg = {
                "device_id": str(param.get("did") or self.device_id or ""),
                "install_id": str(param.get("iid") or self.install_id or ""),
            }
            user_q = str(param.get("q") or param.get("quality") or "").strip()
            # 有原生 AES：优先 1080；纯 Python AES 很慢：先 720 保证能播，再尝试更高
            if user_q:
                order = [user_q, "1080", "720", "480", "360"]
            elif _aes_is_fast():
                order = ["1080", "720", "480", "360"]
            else:
                order = ["720", "480", "1080", "360"]
            # dedupe
            seen_q = set()
            quals = []
            for q in order:
                if q and q not in seen_q:
                    seen_q.add(q)
                    quals.append(q)

            # 缓存命中直接返回。用户指定线路清晰度(user_q)时，只认该清晰度缓存，
            # 不能回退命中其它清晰度缓存（否则请求480会拿到360内容）。
            if user_q:
                primary = [user_q]
            else:
                primary = quals
            for q in primary:
                cached = _hg_cache_get(vid, q)
                if cached:
                    return [200, "video/mp4", cached]

            model = _video_model(vid, cfg)
            rows = _quality_rows(_video_list_from_model(model))
            if not rows:
                return [500, "text/plain; charset=utf-8", b"empty video list"]
            # 只在真能解码的档位里挑，否则会整集下完、解完锁，再交给播放器黑屏。
            playable = _playable_qualities(rows)
            if playable:
                order = [q for q in quals if q in playable] + [
                    q for q in _QUALITY_ORDER if q in playable and q not in quals
                ]
                if order:
                    quals = order

            last_err = None
            for wanted in quals:
                try:
                    # 再查一次该清晰度缓存（model 解析后）
                    cached = _hg_cache_get(vid, wanted)
                    if cached:
                        return [200, "video/mp4", cached]
                    _, item = _resolve_quality(rows, wanted)
                    url = _media_url(item)
                    spade = _spade_value(item)
                    if not url or not spade:
                        last_err = "missing url/spade q=%s" % wanted
                        continue
                    try:
                        key_seed = _key_seed_from_model(model)
                        if key_seed:
                            url = _decrypt_spade_url(url, key_seed)
                    except Exception:
                        pass

                    # 下载超时：纯 AES 环境更短，避免壳端空等后失败
                    dl_timeout = 150 if _aes_is_fast() else 90
                    media_headers = {
                        "User-Agent": MEDIA_UA,
                        "Referer": "https://novel.snssdk.com/",
                    }
                    try:
                        body = _multi_download(
                            url,
                            headers=media_headers,
                            timeout=dl_timeout,
                            workers=4 if _aes_is_fast() else 3,
                        )
                    except Exception as dl_err:
                        last_err = "download failed q=%s err=%s" % (wanted, dl_err)
                        continue
                    if not body:
                        last_err = "empty body q=%s" % wanted
                        continue

                    # 纯 AES 且体积过大时跳过超大 1080，减少必超时
                    if (not _aes_is_fast()) and wanted in ("1080", "4k") and len(body) > 45 * 1024 * 1024:
                        last_err = "skip large %s without native AES size=%s" % (wanted, len(body))
                        continue

                    plain = decrypt_mp4_cenc(body, derive_content_key(spade))
                    if len(plain) < 64 or (b"ftyp" not in plain[:64] and b"moov" not in plain[:4096]):
                        last_err = "bad mp4 after decrypt q=%s" % wanted
                        continue
                    try:
                        _hg_cache_put(vid, wanted, plain)
                    except Exception:
                        pass
                    return [200, "video/mp4", plain]
                except Exception as one_err:
                    last_err = "%s q=%s" % (one_err, wanted)
                    continue

            msg = "hg localProxy failed: %s" % last_err
            return [500, "text/plain; charset=utf-8", msg.encode("utf-8")]
        except Exception as exc:
            msg = "hg localProxy failed: %s\n%s" % (exc, traceback.format_exc())
            return [500, "text/plain; charset=utf-8", msg.encode("utf-8")]