import 'package:audioplayers/audioplayers.dart';
import 'package:get/get.dart';

/// 语音播放管理器，单例模式，统一管理语音播放
class VoicePlayerManager extends GetxController {
  static VoicePlayerManager? _instance;
  static VoicePlayerManager get instance {
    _instance ??= Get.put(VoicePlayerManager());
    return _instance!;
  }

  final AudioPlayer _audioPlayer = AudioPlayer();
  String? _currentPlayingId;
  final Rx<String?> currentPlayingId = Rx<String?>(null);
  final Rx<PlayerState> playerState = Rx<PlayerState>(PlayerState.stopped);

  VoicePlayerManager() {
    // 监听播放状态变化
    _audioPlayer.onPlayerStateChanged.listen((state) {
      playerState.value = state;
      if (state == PlayerState.completed) {
        // 播放完成，重置状态
        _currentPlayingId = null;
        currentPlayingId.value = null;
      }
    });
  }

  /// 播放音频
  /// [audioId] 音频的唯一标识（通常是消息ID）
  /// [filePath] 音频文件路径
  Future<void> play(String audioId, String filePath) async {
    try {
      print('🎵 [VoicePlayerManager] 准备播放音频: audioId=$audioId, filePath=$filePath');
      
      // 如果是同一个音频，则暂停/恢复
      if (_currentPlayingId == audioId) {
        print('⏯️ [VoicePlayerManager] 切换播放/暂停状态');
        try {
          if (playerState.value == PlayerState.playing) {
            await _audioPlayer.pause();
          } else {
            await _audioPlayer.resume();
          }
        } catch (e) {
          print('⚠️ [VoicePlayerManager] 暂停/恢复失败，尝试重新播放: $e');
          // 如果暂停/恢复失败，继续执行播放新音频的逻辑
        }
        // 如果成功暂停/恢复，直接返回
        if (_currentPlayingId == audioId && 
            (playerState.value == PlayerState.playing || 
             playerState.value == PlayerState.paused)) {
          return;
        }
      }
      
      // 如果正在播放其他音频，先停止
      if (_currentPlayingId != null && _currentPlayingId != audioId) {
        print('🛑 [VoicePlayerManager] 停止当前播放的音频: $_currentPlayingId');
        try {
          // 只在播放器状态不是 stopped 时才调用 stop
          if (playerState.value != PlayerState.stopped) {
            await _audioPlayer.stop();
          }
        } catch (e) {
          print('⚠️ [VoicePlayerManager] 停止播放器时出错（可忽略）: $e');
        }
        // 重置当前播放ID
        _currentPlayingId = null;
        currentPlayingId.value = null;
        // 等待一小段时间确保停止完成
        await Future.delayed(Duration(milliseconds: 200));
      }
      
      // 播放新音频前，如果播放器正在播放或暂停，先停止
      print('🔄 [VoicePlayerManager] 准备播放新音频，当前状态: ${playerState.value}');
      if (playerState.value == PlayerState.playing || playerState.value == PlayerState.paused) {
        try {
          await _audioPlayer.stop();
          await Future.delayed(Duration(milliseconds: 150));
        } catch (e) {
          // 如果 stop 失败，可能是播放器还没有初始化，继续尝试播放
          print('⚠️ [VoicePlayerManager] 停止播放器时出错（可忽略）: $e');
        }
      }
      
      // 设置当前播放的音频ID
      _currentPlayingId = audioId;
      currentPlayingId.value = audioId;
      
      // 根据路径类型选择不同的播放源
      if (filePath.startsWith('http://') || filePath.startsWith('https://')) {
        print('🌐 [VoicePlayerManager] 使用网络URL播放: $filePath');
        await _audioPlayer.play(UrlSource(filePath));
      } else {
        print('📁 [VoicePlayerManager] 使用本地文件播放: $filePath');
        await _audioPlayer.play(DeviceFileSource(filePath));
      }
      
      print('✅ [VoicePlayerManager] 音频播放请求已发送');
    } catch (e, stackTrace) {
      print('❌ [VoicePlayerManager] 播放音频失败: $e');
      print('📚 [VoicePlayerManager] 堆栈跟踪: $stackTrace');
      // 重置状态
      _currentPlayingId = null;
      currentPlayingId.value = null;
      // 重新抛出异常，让调用者知道播放失败
      rethrow;
    }
  }

  /// 停止播放
  Future<void> stop() async {
    try {
      // 只在播放器状态不是 stopped 时才调用 stop
      if (playerState.value != PlayerState.stopped) {
        await _audioPlayer.stop();
      }
      _currentPlayingId = null;
      currentPlayingId.value = null;
    } catch (e) {
      print('⚠️ [VoicePlayerManager] 停止播放失败（可忽略）: $e');
      // 即使停止失败，也重置状态
      _currentPlayingId = null;
      currentPlayingId.value = null;
    }
  }

  /// 暂停播放
  Future<void> pause() async {
    try {
      await _audioPlayer.pause();
    } catch (e) {
      print('暂停播放失败: $e');
    }
  }

  /// 检查指定音频是否正在播放
  bool isPlaying(String audioId) {
    return _currentPlayingId == audioId &&
        playerState.value == PlayerState.playing;
  }

  /// 检查指定音频是否已加载
  bool isLoaded(String audioId) {
    return _currentPlayingId == audioId;
  }

  @override
  void onClose() {
    _audioPlayer.dispose();
    super.onClose();
  }
}