spotube/lib/services/audio_player/audio_player_impl.dart

part of 'audio_player.dart';

final audioPlayer = SpotubeAudioPlayer();

class SpotubeAudioPlayer extends AudioPlayerInterface
    with SpotubeAudioPlayersStreams {
  Object _resolveUrlType(String url) {
    if (mkSupportedPlatform) {
      return mk.Media(url);
    } else {
      if (url.startsWith("https")) {
        return ja.AudioSource.uri(Uri.parse(url));
      } else {
        return ja.AudioSource.file(url);
      }
    }
  }

  Future<void> preload(String url) async {
    throw UnimplementedError();
    // final urlType = _resolveUrlType(url);
    // if (mkSupportedPlatform && urlType is ap.Source) {
    //   // audioplayers doesn't have the capability to preload
    //   return;
    // } else {
    //   return;
    // }
  }

  Future<void> play(String url) async {
    final urlType = _resolveUrlType(url);
    if (mkSupportedPlatform && urlType is mk.Media) {
      await _mkPlayer?.open(urlType, play: true);
    } else {
      if (_justAudio?.audioSource is ja.ProgressiveAudioSource &&
          (_justAudio?.audioSource as ja.ProgressiveAudioSource)
                  .uri
                  .toString() ==
              url) {
        await _justAudio?.play();
      } else {
        await _justAudio?.stop();
        await _justAudio?.setAudioSource(
          urlType as ja.AudioSource,
          preload: true,
        );
        await _justAudio?.play();
      }
    }
  }

  Future<void> pause() async {
    await _mkPlayer?.pause();
    await _justAudio?.pause();
  }

  Future<void> resume() async {
    await _mkPlayer?.play();
    await _justAudio?.play();
  }

  Future<void> stop() async {
    await _mkPlayer?.stop();
    await _justAudio?.stop();
  }

  Future<void> seek(Duration position) async {
    await _mkPlayer?.seek(position);
    await _justAudio?.seek(position);
  }

  /// Volume is between 0 and 1
  Future<void> setVolume(double volume) async {
    assert(volume >= 0 && volume <= 1);
    await _mkPlayer?.setVolume(volume * 100);
    await _justAudio?.setVolume(volume);
  }

  Future<void> setSpeed(double speed) async {
    await _mkPlayer?.setRate(speed);
    await _justAudio?.setSpeed(speed);
  }

  Future<void> dispose() async {
    await _mkPlayer?.dispose();
    await _justAudio?.dispose();
  }

  // Playlist related

  Future<void> openPlaylist(
    List<String> tracks, {
    bool autoPlay = true,
    int initialIndex = 0,
  }) async {
    assert(tracks.isNotEmpty);
    assert(initialIndex <= tracks.length - 1);
    if (mkSupportedPlatform) {
      await _mkPlayer!.open(
        mk.Playlist(
          tracks.map(mk.Media.new).toList(),
          index: initialIndex,
        ),
        play: autoPlay,
      );
    } else {
      await _justAudio!.setAudioSource(
        ja.ConcatenatingAudioSource(
          useLazyPreparation: true,
          children:
              tracks.map((e) => ja.AudioSource.uri(Uri.parse(e))).toList(),
        ),
        preload: true,
        initialIndex: initialIndex,
      );
      if (autoPlay) {
        await _justAudio!.play();
      }
    }
  }

  List<SpotubeTrack> resolveTracksForSource(List<SpotubeTrack> tracks) {
    return tracks.where((e) => sources.contains(e.ytUri)).toList();
  }

  bool tracksExistsInPlaylist(List<SpotubeTrack> tracks) {
    return resolveTracksForSource(tracks).length == tracks.length;
  }

  List<String> get sources {
    if (mkSupportedPlatform) {
      return _mkPlayer!.playlist.medias.map((e) => e.uri).toList();
    } else {
      return _justAudio!.sequenceState?.effectiveSequence
              .map((e) => (e as ja.UriAudioSource).uri.toString())
              .toList() ??
          <String>[];
    }
  }

  int get currentIndex {
    if (mkSupportedPlatform) {
      return _mkPlayer!.playlist.index;
    } else {
      return _justAudio!.sequenceState?.currentIndex ?? -1;
    }
  }

  Future<void> skipToNext() async {
    if (mkSupportedPlatform) {
      await _mkPlayer!.next();
    } else {
      await _justAudio!.seekToNext();
    }
  }

  Future<void> skipToPrevious() async {
    if (mkSupportedPlatform) {
      await _mkPlayer!.previous();
    } else {
      await _justAudio!.seekToPrevious();
    }
  }

  Future<void> jumpTo(int index) async {
    if (mkSupportedPlatform) {
      await _mkPlayer!.jump(index);
    } else {
      await _justAudio!.seek(Duration.zero, index: index);
    }
  }

  Future<void> addTrack(String url) async {
    final urlType = _resolveUrlType(url);
    if (mkSupportedPlatform && urlType is mk.Media) {
      await _mkPlayer!.add(urlType);
    } else {
      await (_justAudio!.audioSource as ja.ConcatenatingAudioSource)
          .add(urlType as ja.AudioSource);
    }
  }

  Future<void> removeTrack(int index) async {
    if (mkSupportedPlatform) {
      await _mkPlayer!.remove(index);
    } else {
      await (_justAudio!.audioSource as ja.ConcatenatingAudioSource)
          .removeAt(index);
    }
  }

  Future<void> moveTrack(int from, int to) async {
    if (mkSupportedPlatform) {
      await _mkPlayer!.move(from, to);
    } else {
      await (_justAudio!.audioSource as ja.ConcatenatingAudioSource)
          .move(from, to);
    }
  }

  Future<void> replaceSource(
    String oldSource,
    String newSource, {
    bool exclusive = false,
  }) async {
    final oldSourceIndex = sources.indexOf(oldSource);
    if (oldSourceIndex == -1) return;

    if (mkSupportedPlatform) {
      _mkPlayer!.replace(oldSource, newSource);
    } else {
      await addTrack(newSource);
      await removeTrack(oldSourceIndex);

      int newSourceIndex = sources.indexOf(newSource);
      while (newSourceIndex == -1) {
        await Future.delayed(const Duration(milliseconds: 100));
        newSourceIndex = sources.indexOf(newSource);
      }
      await moveTrack(newSourceIndex, oldSourceIndex);
      newSourceIndex = sources.indexOf(newSource);
      while (newSourceIndex != oldSourceIndex) {
        await Future.delayed(const Duration(milliseconds: 100));
        await moveTrack(newSourceIndex, oldSourceIndex);
        newSourceIndex = sources.indexOf(newSource);
      }
    }
  }

  Future<void> clearPlaylist() async {
    if (mkSupportedPlatform) {
      _mkPlayer!.stop();
    } else {
      await (_justAudio!.audioSource as ja.ConcatenatingAudioSource).clear();
    }
  }

  Future<void> setShuffle(bool shuffle) async {
    if (mkSupportedPlatform) {
      await _mkPlayer!.setShuffle(shuffle);
    } else {
      await _justAudio!.setShuffleModeEnabled(shuffle);
    }
  }

  Future<void> setLoopMode(PlaybackLoopMode loop) async {
    if (mkSupportedPlatform) {
      await _mkPlayer!.setPlaylistMode(loop.toPlaylistMode());
    } else {
      await _justAudio!.setLoopMode(loop.toLoopMode());
    }
  }
}