// 生成流地址
const generateStreamUrls = (streamKey, requestHost) => {
  // 优先使用环境变量配置的公网地址
  const host = process.env.PUBLIC_SRS_HOST || requestHost || process.env.SRS_HOST || 'localhost';
  const rtmpPort = process.env.PUBLIC_SRS_RTMP_PORT || process.env.SRS_RTMP_PORT || 1935;
  const httpPort = process.env.PUBLIC_SRS_HTTP_PORT || process.env.SRS_HTTP_PORT || 8080;
  const ffmpegPath = process.env.FFMPEG_PATH;

  const embeddedEnabledRaw = process.env.EMBEDDED_MEDIA_SERVER;
  const embeddedEnabled = embeddedEnabledRaw == null
    ? true
    : !['0', 'false', 'off', 'no'].includes(String(embeddedEnabledRaw).toLowerCase());
  
  return {
    // 推流地址 (给主播用) - 完整路径包含 streamKey
    rtmp: `rtmp://${host}:${rtmpPort}/live/${streamKey}`,
    
    // 播放地址 (给观众用)
    flv: `http://${host}:${httpPort}/live/${streamKey}.flv`,
    hls: embeddedEnabled
      ? (ffmpegPath ? `http://${host}:${httpPort}/live/${streamKey}/index.m3u8` : null)
      : `http://${host}:${httpPort}/live/${streamKey}.m3u8`
  };
};

module.exports = { generateStreamUrls };