# -*- encoding: utf-8 -*-

"""
单进程 ffmpeg 推流：从 URL_config.ini 顺序检测直播源，
一旦当前源停播/异常，自动切到下一个正在直播的源并推流到 YouTube。
仅做“检测+转推”，不做录制、分段、通知等。
"""

import asyncio
import os
import sys
import signal
import time
import datetime
import re
import uuid
import subprocess
from pathlib import Path
from typing import Any, List, Tuple, Optional

import configparser
import urllib.request
from urllib.error import URLError, HTTPError

import httpx
from src import spider, stream
from src.utils import logger, Color, check_md5
from ffmpeg_install import check_ffmpeg, ffmpeg_path, current_env_path

# --------------------- 基础环境 ---------------------
version = "relay-1.0.1"
os.environ['PATH'] = ffmpeg_path + os.pathsep + current_env_path
script_path = os.path.split(os.path.realpath(sys.argv[0]))[0]
config_file = f'{script_path}/config/config.ini'
url_config_file = f'{script_path}/config/URL_config.ini'
text_encoding = 'utf-8-sig'
color = Color()

# ---------- YouTube 推流配置（读取 youtube.ini） ----------
_yt_cfg = configparser.ConfigParser()
with open(f"{script_path}/config/youtube.ini", "r", encoding="utf-8-sig") as f:
    _yt_cfg.read_file(f)

def _yt_get(section: str, key: str, fallback=None, cast=str):
    try:
        if cast is bool:
            return _yt_cfg.getboolean(section, key, fallback=fallback)
        if cast is int:
            return _yt_cfg.getint(section, key, fallback=fallback)
        return _yt_cfg.get(section, key, fallback=fallback)
    except Exception:
        return fallback

def _safe_int(v, lo, hi, default):
    try:
        v = int(v)
        if v < lo or v > hi:
            return default
        return v
    except Exception:
        return default

def _build_youtube_rtmp_url(key: str, secure: bool, ingest: str | None):
    node = (ingest or "a").strip().lower()
    node = node if node.isalpha() and len(node) == 1 else "a"
    scheme = "rtmps" if secure else "rtmp"
    host   = f"{node}.rtmps.youtube.com" if secure else f"{node}.rtmp.youtube.com"
    return f"{scheme}://{host}/live2/{key}"

# --------------------- 简化配置读取 ---------------------
def read_config_value(cfg: configparser.RawConfigParser, section: str, option: str, default_value: Any) -> Any:
    try:
        cfg.read(config_file, encoding=text_encoding)
        if section not in cfg.sections():
            cfg.add_section(section)
        return cfg.get(section, option)
    except (configparser.NoSectionError, configparser.NoOptionError):
        cfg.set(section, option, str(default_value))
        with open(config_file, 'w', encoding=text_encoding) as f:
            cfg.write(f)
        return default_value

_CN_BOOL = {"是": True, "否": False}

cfg = configparser.RawConfigParser()
use_proxy = _CN_BOOL.get(read_config_value(cfg, '录制设置', '是否使用代理ip(是/否)', "否"), False)
proxy_addr = read_config_value(cfg, '录制设置', '代理地址', "")
proxy_addr = proxy_addr if use_proxy and proxy_addr.strip() else None
# Cookie（按需）
dy_cookie = read_config_value(cfg, 'Cookie', '抖音cookie', '')
tiktok_cookie = read_config_value(cfg, 'Cookie', 'tiktok_cookie', '')

# 可选：启动时检测系统代理（仅提示）
try:
    if not use_proxy:
        urllib.request.urlopen("https://www.google.com/", timeout=5)
        print("提示：你的网络似乎直连可用（无需代理）。")
except Exception:
    if not use_proxy:
        color.print_colored("提示：无法直连海外站，如需 TikTok 请在 config.ini 开启代理并填写代理地址。", color.YELLOW)

# --------------------- URL 列表读取 ---------------------
def parse_urls_from_file(path: str) -> List[str]:
    """
    读取 URL_config.ini，返回去重且保持相对顺序的 URL 列表。
    支持行内格式：
      - 纯 URL
      - quality,url
      - url,主播: xxx
      - # 注释行 忽略
    """
    urls, seen = [], set()
    if not os.path.isfile(path):
        open(path, 'w', encoding=text_encoding).close()
        print("URL_config.ini 为空，请写入直播间地址后再运行。")
        return urls

    with open(path, "r", encoding=text_encoding, errors='ignore') as f:
        for line in f:
            s = line.strip()
            if not s or s.startswith("#"):
                continue
            # 拆分（最多3段，取包含 https 或域名的那段）
            parts = re.split(r"[，,]\s*", s)
            cand = None
            for p in parts:
                if '://' in p or re.match(r"^[a-zA-Z0-9.-]+\.[a-zA-Z]{2,}", p):
                    cand = p
                    break
            if not cand:
                continue
            url = cand if '://' in cand else f"https://{cand}"
            if url not in seen:
                seen.add(url)
                urls.append(url)
    return urls

# --------------------- 直播解析与选源 ---------------------
def is_flv_preferred_platform(link: str) -> bool:
    # 抖音/TikTok 优先走 FLV；但 H265 不走 FLV
    return any(i in link for i in ["douyin", "tiktok"])

def select_source_url(link: str, stream_info: dict) -> Optional[str]:
    if not stream_info:
        return None
    if is_flv_preferred_platform(link):
        flv = stream_info.get("flv_url")
        if flv:
            # 若 codec=h265 则不走 flv
            try:
                from urllib.parse import urlparse, parse_qs
                qs = parse_qs(urlparse(flv).query or "")
                if (qs.get("codec") or [""])[0].lower() == "h265":
                    logger.warning("FLV 不支持 h265，改用 HLS。")
                else:
                    return flv
            except Exception:
                return flv
    return stream_info.get("record_url") or stream_info.get("m3u8_url") or stream_info.get("flv_url")

async def fetch_port_info(url: str, record_quality_code: str = "OD") -> dict:
    """
    调用项目现有 spider/stream，返回：
      {
        "anchor_name": str,
        "is_live": bool,
        "title": str?,
        "record_url": "...",
        "flv_url": "...",
        "m3u8_url": "..."
      }
    """
    proxy = proxy_addr
    port_info = {}
    try:
        if "douyin.com/" in url:
            if 'v.douyin.com' not in url and '/user/' not in url:
                j = await spider.get_douyin_stream_data(url=url, proxy_addr=proxy, cookies=dy_cookie)
            else:
                j = await spider.get_douyin_app_stream_data(url=url, proxy_addr=proxy, cookies=dy_cookie)
            port_info = await stream.get_douyin_stream_url(j, record_quality_code, proxy)
        elif url.startswith("https://www.tiktok.com/"):
            if proxy:
                j = await spider.get_tiktok_stream_data(url=url, proxy_addr=proxy, cookies=tiktok_cookie)
                port_info = await stream.get_tiktok_stream_url(j, record_quality_code, proxy)
            else:
                logger.error("TikTok 需要代理，请在 config.ini 开启并配置代理。")
                port_info = {"anchor_name": "", "is_live": False}
        elif (".m3u8" in url) or (".flv" in url):
            # 自定义直链
            port_info = {
                "anchor_name": "自定义_" + str(uuid.uuid4())[:8],
                "is_live": True,
            }
            if url.endswith(".flv"):
                port_info["flv_url"] = url
            else:
                port_info["m3u8_url"] = url
        else:
            # 其它站点可按需扩展
            port_info = {"anchor_name": "", "is_live": False}
    except Exception as e:
        logger.error(f"解析失败: {e}")
        port_info = {"anchor_name": "", "is_live": False}
    return port_info

# --------------------- ffmpeg 单进程推流 ---------------------
def build_youtube_output() -> Tuple[str, list, list]:
    key = _yt_get("youtube", "key", fallback="", cast=str)
    if not key:
        logger.error("错误: config/youtube.ini 未配置 key")
        sys.exit(1)

    secure  = _yt_get("youtube", "secure", fallback=False, cast=bool)
    ingest  = _yt_get("youtube", "ingest", fallback="a", cast=str)
    res_str = (_yt_get("youtube", "resolution", fallback="", cast=str) or "").strip()  # 例如 "1080x1920"

    bv   = _safe_int(_yt_get("youtube", "bitrate", fallback=5000, cast=int), 300, 20000, 5000)
    ba   = _safe_int(_yt_get("youtube", "audio_bitrate", fallback=128, cast=int), 64, 384, 128)
    fps  = _safe_int(_yt_get("youtube", "fps", fallback=30, cast=int), 10, 60, 30)
    gop  = _safe_int(_yt_get("youtube", "gop", fallback=2*fps, cast=int), fps, 4*fps, 2*fps)

    out_url = _build_youtube_rtmp_url(key, secure, ingest)

    # —— 默认强制转码（稳） —— #
    v_args = [
        "-c:v", "libx264",
        "-preset", "veryfast",
        "-tune", "zerolatency",
        "-profile:v", "high",
        "-level:v", "4.2",
        "-pix_fmt", "yuv420p",
        "-r", str(fps),
        "-g", str(gop),
        "-b:v", f"{bv}k",
        "-maxrate", f"{bv}k",
        "-bufsize", f"{max(2*bv, 4000)}k",
    ]
    a_args = [
        "-c:a", "aac",
        "-b:a", f"{ba}k",
        "-ar", "44100",
        "-ac", "2",
    ]

    # 可选缩放/留黑边 + 避免 1088x1920（加 crop 强制精确尺寸）
    if res_str:
        try:
            w, h = map(int, res_str.lower().split("x"))
            vf = (
                f"scale={w}:{h}:force_original_aspect_ratio=decrease,"
                f"pad={w}:{h}:(ow-iw)/2:(oh-ih)/2,"
                f"crop={w}:{h},"
                f"format=yuv420p"
            )
            v_args = ["-vf", vf] + v_args
        except Exception:
            logger.warning(f"resolution '{res_str}' 非法，忽略")

    return out_url, v_args, a_args

def launch_ffmpeg(input_url: str,
                  out_url: str,
                  extra_headers: Optional[str] = None,
                  v_args: Optional[list] = None,
                  a_args: Optional[list] = None) -> subprocess.Popen:
    """
    启动一个 ffmpeg 进程：输入 input_url，输出 RTMP/RTMPS 到 out_url。
    - v_args / a_args 由 build_youtube_output() 生成并传入
    - 启动 stdout reader 线程以防缓冲阻塞
    - 设置代理环境变量以兼容 https/hls
    """
    import threading
    user_agent = ("Mozilla/5.0 (Linux; Android 11; SM-G973U) "
                  "AppleWebKit/537.36 (KHTML, like Gecko) "
                  "Chrome/87.0.4280.141 Mobile Safari/537.36")

    # 输入侧容错/重连/探测
    base = [
        "ffmpeg", "-nostdin", "-hide_banner",
        "-stats",                 # 输出统计信息
        "-stats_period", "60",    # 每60秒一次
        "-progress", "pipe:1",    # 状态写到stdout，便于reader捕获
        "-loglevel", "info",

        # 输入容错 & 自动重连
        "-rw_timeout", "15000000",
        "-timeout", "10000000",
        "-reconnect", "1",
        "-reconnect_streamed", "1",
        "-reconnect_at_eof", "1",
        "-reconnect_delay_max", "30",

        # UA/协议白名单
        "-user_agent", user_agent,
        "-protocol_whitelist", "file,http,https,tcp,tls,crypto,udp,rtmp,rtp,httpproxy",

        # 缓冲 & 探测
        "-thread_queue_size", "4096",
        "-analyzeduration", "10000000",
        "-probesize", "10000000",
    ]


    # 平台 headers（referer/origin）要在 -i 之前
    if extra_headers:
        base += ["-headers", extra_headers]

    # 代理：http_proxy/https_proxy 环境变量（同时保留 -http_proxy 兼容）
    env = os.environ.copy()
    if proxy_addr:
        env["http_proxy"] = proxy_addr
        env["https_proxy"] = proxy_addr
        base = ["ffmpeg", "-http_proxy", proxy_addr] + base[1:]

    # 输入
    base += ["-re", "-i", input_url]

    # 通用容错
    base += [
        "-fflags", "+genpts+discardcorrupt+nobuffer",
        "-use_wallclock_as_timestamps", "1",
        "-avioflags", "direct",
        "-rtbufsize", "100M",
    ]

    # 视频/音频编码参数（使用 build_youtube_output 的结果）
    v_args = v_args or []
    a_args = a_args or []
    base += v_args + a_args

    # 输出（flv 到 YT）
    base += ["-f", "flv", out_url]

    # 打印命令便于排障（截断）
    cmd_str = " ".join(base)
    print("ffmpeg cmd:", cmd_str if len(cmd_str) < 500 else cmd_str[:500] + " ...")

    logger.info(f"启动推流：{input_url} -> {out_url}")

    creationflags = 0
    if os.name == "nt":
        # 防止子进程挂住控制台（可选）
        creationflags = subprocess.CREATE_NEW_PROCESS_GROUP

    p = subprocess.Popen(
        base,
        stdin=subprocess.PIPE,
        stdout=subprocess.PIPE,
        stderr=subprocess.STDOUT,
        bufsize=0,  # 避免行缓冲告警 & 尽快刷新
        env=env,
        creationflags=creationflags
    )

    # 最近输出时间戳，用于 watchdog
    p.last_out_ts = time.time()

    def _reader():
        try:
            for line in iter(p.stdout.readline, b''):
                if not line:
                    break
                text = line.decode(errors="ignore").strip()
                p.last_out_ts = time.time()
                # 常见错误提示
                if "Server disconnected" in text:
                    logger.error(f"[YouTube输出异常] {text}")
                elif "not supported" in text or "Invalid" in text or "invalid" in text:
                    logger.error(f"[转码异常] {text}")
        except Exception:
            pass

    t = threading.Thread(target=_reader, daemon=True)
    t.start()

    return p

def stop_ffmpeg(p: Optional[subprocess.Popen]):
    if not p:
        return
    try:
        if os.name == "nt":
            if p.stdin:
                try:
                    p.stdin.write(b"q")
                    p.stdin.flush()
                except Exception:
                    pass
            p.wait(timeout=6)
        else:
            p.send_signal(signal.SIGINT)
            p.wait(timeout=10)
    except Exception:
        try:
            p.kill()
        except Exception:
            pass

# --------------------- 主循环（单进程转推+切源） ---------------------
def check_ffmpeg_existence() -> bool:
    try:
        result = subprocess.run(['ffmpeg', '-version'], check=True, capture_output=True, text=True)
        if result.returncode == 0:
            print(result.stdout.splitlines()[0])
    except Exception:
        pass
    finally:
        return bool(check_ffmpeg())

def now_str(): return datetime.datetime.now().strftime("%Y-%m-%d %H:%M:%S")

def headers_for_platform(platform_name: str, live_url: str) -> Optional[str]:
    live_domain = '/'.join(live_url.split('/')[0:3])
    record_headers = {
        'PandaTV': 'origin:https://www.pandalive.co.kr',
        'WinkTV': 'origin:https://www.winktv.co.kr',
        'PopkonTV': 'origin:https://www.popkontv.com',
        'FlexTV': 'origin:https://www.flextv.co.kr',
        '千度热播': 'referer:https://qiandurebo.com',
        '17Live': 'referer:https://17.live/en/live/6302408',
        '浪Live': 'referer:https://www.lang.live',
        'shopee': f'origin:{live_domain}',
        'Blued直播': 'referer:https://app.blued.cn'
    }
    return record_headers.get(platform_name)

def detect_platform(url: str) -> str:
    if "douyin.com" in url: return "抖音直播"
    if "tiktok.com" in url: return "TikTok直播"
    if url.endswith(".flv") or url.endswith(".m3u8"): return "自定义录制直播"
    return "未知平台"

def main():
    print("-----------------------------------------------------")
    print("|         DouyinLiveRecorder - 单进程转推版          |")
    print("-----------------------------------------------------")
    print(f"版本号: {version}\nGitHub: https://github.com/ihmily/DouyinLiveRecorder")
    print("模式：只检测 + 单进程推流（停播自动切下一个 URL）")
    print(".....................................................")

    if not check_ffmpeg_existence():
        logger.error("缺少 ffmpeg，程序退出")
        sys.exit(1)

    urls = parse_urls_from_file(url_config_file)
    if not urls:
        logger.error("URL_config.ini 中没有可用 URL。")
        sys.exit(1)

    # 顺序轮询索引
    idx = 0
    current_url = None
    current_proc: Optional[subprocess.Popen] = None
    current_platform = ""
    current_anchor = ""
    record_quality_code = "OD"  # 固定“原画”；需要也可改为从 config.ini 读取

    check_interval_live = 8          # 推流中检测当前源是否仍在直播的间隔秒
    scan_interval_when_idle = 2      # 没有任何可用源时的扫描间隔秒
    last_md5 = ""                    # URL 文件变化时热更新

    # watchdog 参数
    watchdog_grace = 60              # 推流开始 60s 内不做静默判定
    watchdog_silence = 300           # 5 分钟完全无输出才重启

    try:
        while True:
            # 动态热更新 URL 列表（URL_config.ini 有变更则重载）
            try:
                md5 = check_md5(url_config_file)
                if md5 != last_md5:
                    urls = parse_urls_from_file(url_config_file) or urls
                    last_md5 = md5
                    print(f"[{now_str()}] 已重载 URL 列表，数量：{len(urls)}")
                    # 若当前 URL 已不在列表，强制切换
                    if current_url and current_url not in urls:
                        print(f"[{now_str()}] 当前URL已被移除，停止并重新选择。")
                        stop_ffmpeg(current_proc)
                        current_proc = None
                        current_url = None
            except Exception as e:
                logger.warning(f"URL 列表热更新失败：{e}")

            if current_proc and current_url:
                retcode = current_proc.poll()
                if retcode is not None:
                    color.print_colored(f"[{now_str()}] ffmpeg 已退出 (code={retcode})，切源…", color.YELLOW)
                    stop_ffmpeg(current_proc)
                    current_proc = None
                    current_url = None
                    continue

                # 检查是否停播（依赖 spider）
                try:
                    port = asyncio.run(fetch_port_info(current_url, record_quality_code))
                    still_live = bool(port.get("is_live"))
                except Exception as e:
                    logger.error(f"检测当前源失败：{e}")
                    still_live = True  # 容错：无法判断时先认为还活着

                if still_live:
                    elapsed = int(time.time() - start_time)
                    h, m = divmod(elapsed, 3600)
                    m, s = divmod(m, 60)
                    dur_str = f"{h:02d}:{m:02d}:{s:02d}"
                    print(f"\r[{now_str()}] 正在转播({dur_str})：{current_platform} | {current_anchor} | {current_url}", end="")

                    # ✅ watchdog（推流开始 > 60s 且 5 分钟完全无输出）
                    silence = time.time() - getattr(current_proc, "last_out_ts", 0)
                    if elapsed >= watchdog_grace and silence > watchdog_silence:
                        color.print_colored(f"\n[{now_str()}] 超过5分钟未见 ffmpeg 输出，判定异常，重启…", color.YELLOW)
                        stop_ffmpeg(current_proc)
                        current_proc = None
                        current_url = None
                        time.sleep(1)
                        continue

                    time.sleep(check_interval_live)
                    continue
                else:
                    color.print_colored(f"\n[{now_str()}] 主播停播，切换下一个源…", color.YELLOW)
                    stop_ffmpeg(current_proc)
                    current_proc = None
                    current_url = None

            else:
                # 未在推流：从 urls 顺序找第一个 is_live 的
                if not urls:
                    time.sleep(scan_interval_when_idle)
                    continue

                tried = 0
                found = False
                start_idx = idx
                while tried < len(urls):
                    url = urls[idx]
                    idx = (idx + 1) % len(urls)
                    tried += 1

                    port = asyncio.run(fetch_port_info(url, record_quality_code))
                    if not port.get("anchor_name"):
                        print(f"[{now_str()}] 获取失败，跳过：{url}")
                        continue
                    if not port.get("is_live"):
                        print(f"[{now_str()}] 未开播：{port.get('anchor_name','')} | {url}")
                        continue

                    # 选取真实播放地址
                    real_url = select_source_url(url, port)
                    if not real_url:
                        print(f"[{now_str()}] 未得到播放地址，跳过：{url}")
                        continue

                    current_platform = detect_platform(url)
                    current_anchor = port.get("anchor_name", "")
                    headers = headers_for_platform(current_platform, url)

                    # 启动 ffmpeg
                    out_url, v_args, a_args = build_youtube_output()
                    current_proc = launch_ffmpeg(real_url, out_url, headers, v_args=v_args, a_args=a_args)
                    current_url = url
                    start_time = time.time()
                    color.print_colored(f"[{now_str()}] 开始转播：{current_platform} | {current_anchor} | {url}", color.GREEN)
                    found = True
                    break

                if not found:
                    # 没有任何源在播，过会儿再试
                    print(f"[{now_str()}] 当前无可用直播源，等待中…")
                    time.sleep(scan_interval_when_idle)
                    continue
    except KeyboardInterrupt:
        print("\n收到中断，正在退出…")
    except Exception as e:
        logger.error(f"主循环异常：{e}")
    finally:
        stop_ffmpeg(current_proc)
        print("已退出。")

if __name__ == "__main__":
    main()