import os
import subprocess
import threading
import asyncio
import uuid
import time
import signal
import sys
import logging
import platform
import spider
import stream
import aiohttp

# ----------------- Logging Setup -----------------
logging.basicConfig(
    level=logging.INFO,
    format="%(asctime)s [%(levelname)s] %(message)s",
    datefmt="%H:%M:%S"
)

IS_WINDOWS = platform.system() == "Windows"

# ----------------- Douyin Recorder (推流已删除，增加9:16裁16:9) -----------------
class DouyinRecorder:
    def __init__(self, audio_bitrate=128, max_minutes=8):
        self.record_proc = None
        self.stop_flag = threading.Event()
        self.audio_bitrate = audio_bitrate
        self.start_time = None
        self.room_name = None
        self.out_file = None
        self.max_minutes = max_minutes

        os.makedirs("records", exist_ok=True)


    def _build_record_cmd(self, real_url):
        base_name = f"{self.room_name}_{int(time.time())}.mp4"
        self.out_file = os.path.join("records", base_name).replace("\\", "/")

        # 处理竖屏视频裁切成16:9，并两边使用模糊背景填充
        # 输入假设是720x1280竖屏，输出16:9 1280x720
        # 原理：1) 原视频缩放高度720，保持宽度自适应
        #        2) 原视频模糊填充16:9背景
        vf_filter = (
            "split [a][b];"
            "[a] scale=-1:720 [main];"
            "[b] scale=1280:720, boxblur=luma_radius=20:luma_power=1:chroma_radius=20:chroma_power=1 [bg];"
            "[bg][main] overlay=(W-w)/2:(H-h)/2"
        )

        cmd = [
            'ffmpeg', '-y',
            '-i', real_url,
            '-c:v', 'libx264',
            '-preset', 'veryfast',
            '-tune', 'zerolatency',
            '-vf', vf_filter,
            '-c:a', 'aac',
            '-b:a', f'{self.audio_bitrate}k',
            '-ar', '44100',
            '-ac', '2',
            '-movflags', '+faststart+frag_keyframe',
            self.out_file
        ]
        return cmd  


    # ----------------- 录制循环 -----------------
    def start_record(self, real_url, room_name=None):
        self.room_name = room_name or f"抖音_{str(uuid.uuid4())[:8]}"
        logging.info(f"[{self.room_name}] 启动本地录制")
        threading.Thread(target=self._run_record_loop, args=(real_url,), daemon=True).start()
        threading.Thread(target=self._monitor_thread, daemon=True).start()

    def _run_record_loop(self, real_url):
        while not self.stop_flag.is_set():
            try:
                self.start_time = time.time()

                # ---- 启动本地录制 ----
                record_cmd = self._build_record_cmd(real_url)
                self.record_proc = subprocess.Popen(
                    record_cmd, stdout=subprocess.PIPE, stderr=subprocess.PIPE
                )

                logging.info(f"[{self.room_name}] 本地录制开始: {self.out_file}")

                # ---- 监控 stderr ----
                def monitor_proc(proc):
                    try:
                        for line in iter(proc.stderr.readline, b''):
                            if self.stop_flag.is_set():
                                break
                            if line:
                                decoded = line.decode('utf-8', errors='ignore').strip()
                                logging.debug(f"[{self.room_name} record]: {decoded}")
                    except Exception as e:
                        logging.error(f"[{self.room_name} record stderr异常: {e}")

                threading.Thread(target=monitor_proc, args=(self.record_proc,), daemon=True).start()

                # ---- 循环检查 ----
                while not self.stop_flag.is_set():
                    elapsed = time.time() - self.start_time
                    if elapsed >= self.max_minutes * 60:
                        logging.warning(f"[{self.room_name}] 超过 {self.max_minutes} 分钟，自动停止录制")
                        self.stop()
                        break
                    if self.record_proc.poll() is not None:
                        logging.warning(f"[{self.room_name}] FFmpeg 录制进程退出，1秒后重启...")
                        break
                    time.sleep(2)

            except Exception as e:
                logging.error(f"[{self.room_name}] FFmpeg录制异常: {e}")
            finally:
                self._terminate_proc()
                self._finalize_recording()
                if not self.stop_flag.is_set():
                    time.sleep(1)

    def _terminate_proc(self):
        if self.record_proc and self.record_proc.poll() is None:
            self.record_proc.terminate()
            try:
                self.record_proc.wait(timeout=2)
            except subprocess.TimeoutExpired:
                self.record_proc.kill()
        self.record_proc = None

    # ----------------- 监控线程 -----------------
    def _monitor_thread(self):
        while not self.stop_flag.is_set():
            uptime = int(time.time() - self.start_time) if self.start_time else 0
            m, s = divmod(uptime, 60)
            status = "录制中" if self.record_proc and self.record_proc.poll() is None else "启动中"
            print(f"\r[{self.room_name}] {status} | 运行时间: {m:02d}:{s:02d} | 音频码率: {self.audio_bitrate}k", end="")
            time.sleep(2)

    # ----------------- 停止 -----------------
    def stop(self):
        logging.info(f"[{self.room_name}] 停止录制...")
        self.stop_flag.set()
        self._terminate_proc()
        self._finalize_recording()

    def _finalize_recording(self):
        if self.out_file and os.path.exists(self.out_file):
            try:
                if self.record_proc and self.record_proc.poll() is None:
                    sig = signal.CTRL_BREAK_EVENT if IS_WINDOWS else signal.SIGINT
                    self.record_proc.send_signal(sig)
                    try:
                        self.record_proc.wait(timeout=5)
                    except subprocess.TimeoutExpired:
                        self.record_proc.kill()
            except Exception:
                pass

            elapsed = int(time.time() - self.start_time) if self.start_time else 0
            suffix = f"_{elapsed // 60}min" if elapsed >= 60 else f"_{elapsed}s"
            new_name = self.out_file.replace(".mp4", f"{suffix}.mp4")
            try:
                os.rename(self.out_file, new_name)
            except FileExistsError:
                new_name = self.out_file.replace(".mp4", f"_{uuid.uuid4().hex[:4]}.mp4")
                os.rename(self.out_file, new_name)
            size_mb = os.path.getsize(new_name) / (1024 * 1024)
            logging.info(f"[{self.room_name}] 本地录制已结束: {new_name} | 大小: {size_mb:.2f} MB")


# ----------------- Douyin Stream Parsing -----------------
async def get_douyin_real_url(record_url, record_quality="原画", proxy_addr=None, cookies=''):
    headers = {
        "User-Agent": ("Mozilla/5.0 (Windows NT 10.0; Win64; x64) "
                       "AppleWebKit/537.36 (KHTML, like Gecko) Chrome/140.0.0.0 Safari/537.36"),
        "Referer": "https://www.douyin.com/",
        "Origin": "https://www.douyin.com",
        "Accept": "application/json, text/javascript, */*; q=0.01",
    }

    session_args = {"headers": headers}
    if proxy_addr:
        session_args["proxy"] = proxy_addr

    try:
        async with aiohttp.ClientSession(**session_args) as session:
            for attempt in range(3):
                try:
                    async with session.get(record_url, cookies=cookies) as resp:
                        text = await resp.text()
                        if not text or "captcha" in text.lower():
                            logging.warning(f"第{attempt+1}次尝试获取流失败，返回内容为空或验证码，重试...")
                            await asyncio.sleep(1)
                            continue
                        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, proxy_addr=proxy_addr, cookies=cookies)
                        else:
                            json_data = await spider.get_douyin_app_stream_data(
                                url=record_url, proxy_addr=proxy_addr, cookies=cookies)

                        port_info = await stream.get_douyin_stream_url(
                            json_data, record_quality, proxy_addr)
                        if port_info and port_info.get("record_url"):
                            return port_info.get("record_url")
                        else:
                            logging.warning(f"第{attempt+1}次尝试解析失败，port_info为空")
                            await asyncio.sleep(1)
                except Exception as e:
                    logging.warning(f"第{attempt+1}次尝试抓取抖音流异常: {e}")
                    await asyncio.sleep(1)
        logging.error("多次尝试后仍获取抖音真实流失败")
        return None
    except Exception as e:
        logging.error(f"初始化 aiohttp session 失败: {e}")
        return None

def start_douyin_record(record_url, room_name=None, proxy_addr=None, cookies='', audio_bitrate=128):
    real_url = asyncio.run(get_douyin_real_url(record_url, proxy_addr=proxy_addr, cookies=cookies))
    if not real_url:
        logging.error("获取真实直播流失败")
        return None
    logging.info(f"实际直播流: {real_url}")
    recorder = DouyinRecorder(audio_bitrate=audio_bitrate)
    recorder.start_record(real_url, room_name)
    return recorder

# ----------------- Main Program -----------------
if __name__ == "__main__":
    DOUYIN_URL = "https://live.douyin.com/530395023516"

    recorder_instance = start_douyin_record(DOUYIN_URL)
    if not recorder_instance:
        logging.error("录制实例创建失败，程序退出")
        sys.exit(1)

    def signal_handler(sig, frame):
        if recorder_instance:
            recorder_instance.stop()
        sys.exit(0)

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

    logging.info("程序已启动，本地录制中，按 Ctrl+C 停止...")
    while True:
        time.sleep(60)
