import 'package:fast_cached_network_image/fast_cached_network_image.dart';
import 'package:flutter/material.dart';
import 'package:just_audio/just_audio.dart';
import 'package:just_audio_background/just_audio_background.dart';
import 'package:ocarina/api/subsonic/song.dart';
import 'package:ocarina/main.dart';
import 'package:ocarina/util/util.dart';

/// Service used to control the audio player
class AudioPlayerService {
  /// Service used to control the audio player
  factory AudioPlayerService() {
    return _audioPlayerService;
  }

  AudioPlayerService._internal();
  static final AudioPlayerService _audioPlayerService =
      AudioPlayerService._internal();

  /// The [AudioPlayer] instance
  final _player = AudioPlayer();

  /// True if [AudioPlayer] instance is playing
  bool get isPlaying => _player.playing;

  /// Currently playing song
  ///
  /// Null if no song is loaded
  Song? get song => _song;

  set song(Song? s) {
    _song = s;
    logger.d("CHANGE song");
    songNotifier.value = s;

    _setColorScheme();
  }

  Song? _song;

  /// Pauses playback
  Future<void> pause() async {
    await _player.pause();
    logger.d("Paused");
  }

  /// Resumes playback
  void resume() {
    _player.play();
    logger.d("Playing");
  }

  /// Sets color scheme from image
  Future<void> _setColorScheme() async {
    if (AudioPlayerService().song == null) {
      themeNotifier.value = ColorScheme.fromSeed(seedColor: Colors.deepPurple);
    }
    themeNotifier.value = await ColorScheme.fromImageProvider(
      provider: FastCachedImageProvider(
        AudioPlayerService().song!.coverArtUrl,
      ),
    );
    logger.d(AudioPlayerService().song!.coverArtUrl);
  }

  /// Plays the passed [Song] as a file
  Future<void> playFile({Song? song}) async {
    final doCache = sp.getBool("doCache") ?? true;
    if (song == null && this.song == null) return;
    song ??= this.song;
    await _player.setAudioSource(
      doCache
          ? LockCachingAudioSource(
              Uri.parse(song!.streamUrl),
              tag: MediaItem(
                id: song.id,
                title: song.title,
                album: song.albumName,
                artist: song.artistName,
                artUri: Uri.parse(song.coverArtUrl),
              ),
            )
          : AudioSource.uri(
              Uri.parse(song!.streamUrl),
              tag: MediaItem(
                id: song.id,
                title: song.title,
                album: song.albumName,
                artist: song.artistName,
                artUri: Uri.parse(song.coverArtUrl),
              ),
            ),
    );
    await _player.seek(Duration.zero);
    playerKey.currentState?.update();
    resume();
  }
}