import os
import subprocess
import threading
import asyncio
import uuid
import queue
import time
import signal
import sys
import spider
import stream

class HLS2YouTube:
    def __init__(self, delay_sec=30):
        self.processes = {}
        self.stop_flag = threading.Event()
        self.delay_sec = delay_sec
        self.segment_time = 2  # 内部缓冲每个小片段2秒
        self.buffer_queue = queue.Queue()

    def start_stream(self, real_url, youtube_key, room_name=None):
        room_name = room_name or f"抖音_{str(uuid.uuid4())[:8]}"
        print(f"[{room_name}] 启动推流，目标 YouTube Key: {youtube_key}")
        threading.Thread(target=self._pull_thread, args=(real_url,), daemon=True).start()
        threading.Thread(target=self._push_thread, args=(youtube_key, room_name), daemon=True).start()

    def _pull_thread(self, real_url):
        # 拉流存入内存队列
        cmd = [
            "ffmpeg",
            "-rw_timeout", "50000000",
            "-user_agent", "Mozilla/5.0",
            "-headers", "Referer: https://www.douyin.com/",
            "-fflags", "+nobuffer+genpts",
            "-flags", "low_delay",
            "-reconnect", "1",
            "-reconnect_at_eof", "1",
            "-reconnect_streamed", "1",
            "-reconnect_delay_max", "10",
            "-i", real_url,
            "-c", "copy",
            "-f", "mpegts",
            "-"
        ]
        try:
            proc = subprocess.Popen(cmd, stdout=subprocess.PIPE, stderr=subprocess.DEVNULL)
            while not self.stop_flag.is_set():
                data = proc.stdout.read(188*50)  # 每次读小片段
                if not data:
                    time.sleep(0.1)
                    continue
                self.buffer_queue.put(data)
        except Exception as e:
            print(f"拉流异常: {e}")

    def _push_thread(self, youtube_key, room_name):
        min_buffer = self.delay_sec // self.segment_time
        cmd = [
            "ffmpeg",
            "-re",
            "-f", "mpegts",
            "-i", "-",
            "-c:v", "libx264",
            "-preset", "veryfast",
            "-tune", "zerolatency",
            "-b:v", "3000k",
            "-maxrate", "3000k",
            "-bufsize", "6000k",
            "-r", "30",
            "-g", "60",
            "-c:a", "aac",
            "-b:a", "128k",
            "-f", "flv",
            f"rtmp://a.rtmp.youtube.com/live2/{youtube_key}"
        ]
        try:
            proc = subprocess.Popen(cmd, stdin=subprocess.PIPE)
            self.processes[room_name] = proc
            # 等待队列蓄水
            while self.buffer_queue.qsize() < min_buffer and not self.stop_flag.is_set():
                time.sleep(0.5)
            # 持续推送
            while not self.stop_flag.is_set():
                if not self.buffer_queue.empty():
                    data = self.buffer_queue.get()
                    proc.stdin.write(data)
                    proc.stdin.flush()
                else:
                    time.sleep(0.05)
        except Exception as e:
            print(f"[{room_name}] 推流异常: {e}")

    def stop_all(self):
        print("停止所有推流...")
        self.stop_flag.set()
        for proc in self.processes.values():
            if proc.poll() is None:
                proc.terminate()

# ----------------- 抖音解析逻辑 -----------------
async def get_douyin_real_url(record_url, record_quality="原画"):
    if 'v.douyin.com' not in record_url and '/user/' not in record_url:
        json_data = await spider.get_douyin_stream_data(url=record_url)
    else:
        json_data = await spider.get_douyin_app_stream_data(url=record_url)
    port_info = await stream.get_douyin_stream_url(json_data, record_quality, None)
    return port_info.get("record_url")

# ----------------- 启动推流 -----------------
def start_douyin_to_youtube(record_url, youtube_key, room_name=None, delay_sec=30):
    try:
        real_url = asyncio.run(get_douyin_real_url(record_url))
    except Exception as e:
        print(f"获取真实直播流失败: {e}")
        return
    if not real_url:
        print("获取真实直播流失败")
        return
    print(f"实际直播流: {real_url}")
    hls2yt = HLS2YouTube(delay_sec=delay_sec)
    hls2yt.start_stream(real_url, youtube_key, room_name)
    return hls2yt

# ----------------- 示例 -----------------
if __name__ == "__main__":
    DOUYIN_URL = "https://live.douyin.com/104914538985"
    YOUTUBE_KEY = "qxvb-r47b-r5ju-6ud3-6k7z"

    hls_instance = start_douyin_to_youtube(DOUYIN_URL, YOUTUBE_KEY, delay_sec=30)

    def signal_handler(sig, frame):
        if hls_instance:
            hls_instance.stop_all()
        sys.exit(0)

    signal.signal(signal.SIGINT, signal_handler)
    signal.signal(signal.SIGTERM, signal_handler)

    while True:
        time.sleep(60)