const CONFIG = {
  port:            process.env.PORT             || 3700,
  musicPath:       process.env.MUSIC_PATH       || '/music',
  ytdlpBin:        process.env.YTDLP_BIN       || 'yt-dlp',
  audioFmt:        process.env.AUDIO_FMT       || 'mp3',
  audioQuality:    process.env.AUDIO_QUALITY   || '0',
  maxParallel:     parseInt(process.env.MAX_PARALLEL || '2', 10),
  // 'ytdlp' | 'squid' | 'auto' (squid first, yt-dlp fallback)
  downloadBackend: (process.env.DOWNLOAD_BACKEND || 'auto').toLowerCase(),
  // squid.wtf quality: 'mp3' | 'flac' | 'hi-res'
  squidQuality:    (process.env.SQUID_QUALITY   || 'mp3').toLowerCase(),
  // Spotify Developer credentials (Client Credentials Flow — free, no Premium needed)
  spotifyClientId:     process.env.SPOTIFY_CLIENT_ID     || '',
  spotifyClientSecret: process.env.SPOTIFY_CLIENT_SECRET || '',
};

module.exports = CONFIG;