import 'package:audioplayers/audioplayers.dart';
import 'package:wow_english/common/extension/string_extension.dart';

enum AudioPlayerUtilType {
  welcomeToWow('welcome_to_wow'),
  classTime('class_time'),
  gameTime('game_time'),
  musicTime('music_time'),
  readingTime('reading_time'),
  videoTime('video_time'),
  quizTime('quiz_time'),
  countWithMe('count_with_me_instrumental'),
  inMyTummy('in_my_tummy_instrumental'),
  touch('touch_instrumental');

  const AudioPlayerUtilType(this.path);

  final String path;
}

class AudioPlayerUtil {
  static AudioPlayerUtil? _instance;
  late AudioPlayer audioPlayer;
  late AudioPlayerUtilType currentType;

  // 私有构造函数
  AudioPlayerUtil._internal() {
    audioPlayer = AudioPlayer();
    audioPlayer.onPlayerStateChanged.listen((event) async {
      if (event == PlayerState.completed) {
        // 播放结束再次播放
        if (currentType == AudioPlayerUtilType.inMyTummy) {
          AudioPlayerUtil.getInstance()
              .playAudio(AudioPlayerUtilType.inMyTummy);
        }
        if (currentType == AudioPlayerUtilType.countWithMe) {
          AudioPlayerUtil.getInstance()
              .playAudio(AudioPlayerUtilType.countWithMe);
        }
        if (currentType == AudioPlayerUtilType.welcomeToWow) {
          AudioPlayerUtil.getInstance().playAudio(AudioPlayerUtilType.touch);
        }
        if (currentType == AudioPlayerUtilType.touch) {
          AudioPlayerUtil.getInstance().playAudio(AudioPlayerUtilType.touch);
        }
      }
    });
  }

  static AudioPlayerUtil getInstance() {
    _instance ??= AudioPlayerUtil._internal();
    return _instance!;
  }

// 播放音频
  Future<void> playAudio(AudioPlayerUtilType type) async {
    currentType = type;
    String path = type.path;
    await audioPlayer.play(AssetSource(path.assetMp3), volume: 0.5);
    await audioPlayer.onPlayerComplete.first;
  }

  // stop
  void stop() {
    audioPlayer.stop();
  }

  // pause
  void pause() {
    if (audioPlayer.state == PlayerState.playing) {
      audioPlayer.pause();
    }
  }

  // resume
  void resume() {
    if (audioPlayer.state == PlayerState.paused) {
      audioPlayer.resume();
    }
  }
}