import 'package:flutter/services.dart';
import 'package:flame_audio/flame_audio.dart';
import 'dart:math';
import 'dart:io' show Platform;
import '../../utils/theme_manager.dart';

class AudioManager {
  static final AudioManager _instance = AudioManager._internal();
  factory AudioManager() => _instance;
  AudioManager._internal();

  final Random _random = Random();

  bool _soundEnabled = true;
  bool _musicEnabled = true;
  bool _hapticEnabled = true;
  double _bgmVolume = 0.4; // 40% default
  double _sfxVolume = 0.6; // 60% default
  bool _isAudioSupported = false;
  bool _isVibrationSupported = false;

  AudioPool? _popPool;
  AudioPool? _popAltPool;

  // Current playing music context
  String? _currentMenuMusic;
  String? _currentIngameMusic;
  bool _isMenuMusic = false;

  // Available ingame music tracks by theme
  static const Map<String, List<String>> _ingameMusicTracks = {
    'default': ['ingame/ingame_default_001.mp3'],
    'spring': ['ingame/ingame_spring_001.mp3'],
    'summer': ['ingame/ingame_summer_001.mp3'],
    'autumn': ['ingame/ingame_autumn_001.mp3'],
    'winter': ['ingame/ingame_winter_001.mp3', 'ingame/ingame_winter_002.mp3'],
  };

  bool get soundEnabled => _soundEnabled;
  bool get musicEnabled => _musicEnabled;
  bool get hapticEnabled => _hapticEnabled;
  double get bgmVolume => _bgmVolume;
  double get sfxVolume => _sfxVolume;
  bool get isAudioSupported => _isAudioSupported;
  bool get isVibrationSupported => _isVibrationSupported;

  Future<void> initialize() async {
    await _detectPlatformCapabilities();

    if (_isAudioSupported) {
      // Preload audio assets
      try {
        // Basic sound effects
        await FlameAudio.audioCache.loadAll([
          'source/ambient_background.mp3',
          'source/bubble_pop.mp3',
          'source/bubble_pop_alt.mp3',
        ]);

        // Menu music files
        await FlameAudio.audioCache.loadAll([
          'menu/menu_default.mp3',
          'menu/menu_spring.mp3',
          'menu/menu_summer.mp3',
          'menu/menu_autumn.mp3',
          'menu/menu_winter.mp3',
        ]);

        // Ingame music files
        final allIngameTracks = <String>[];
        for (final tracks in _ingameMusicTracks.values) {
          allIngameTracks.addAll(tracks);
        }
        await FlameAudio.audioCache.loadAll(allIngameTracks);

        // Create sound pools for efficient playback
        _popPool = await FlameAudio.createPool(
          'source/bubble_pop.mp3',
          maxPlayers: 5,
        );
        _popAltPool = await FlameAudio.createPool(
          'source/bubble_pop_alt.mp3',
          maxPlayers: 5,
        );
      } catch (e) {
        print('Failed to load audio assets or create pools: $e');
      }
    }

    print('AudioManager initialized for ${Platform.operatingSystem}');
  }

  Future<void> _detectPlatformCapabilities() async {
    // Check audio support
    _isAudioSupported = _checkAudioSupport();

    // Check vibration support
    _isVibrationSupported = _checkVibrationSupport();

    print(
      'Platform capabilities - Audio: $_isAudioSupported, Vibration: $_isVibrationSupported',
    );
  }

  bool _checkAudioSupport() {
    try {
      // Just Audio supports Android, iOS, web, macOS, Windows and Linux
      // See: https://pub.dev/packages/just_audio
      return true;
    } catch (e) {
      print('Audio detection failed: $e');
      return false;
    }
  }

  bool _checkVibrationSupport() {
    try {
      // Only Android and iOS support vibration via HapticFeedback
      if (Platform.isAndroid || Platform.isIOS) {
        return true;
      }
      return false;
    } catch (e) {
      print('Vibration detection failed: $e');
      return false;
    }
  }

  void playBubblePop() {
    if (!_soundEnabled) return;

    // Make audio playback async to avoid blocking main thread
    _playBubblePopAsync();

    // Handle haptic feedback asynchronously
    if (_hapticEnabled && _isVibrationSupported) {
      _playHapticFeedbackAsync();
    }
  }

  void _playBubblePopAsync() async {
    if (_isAudioSupported) {
      // Use Flame Audio for bubble pop
      final sound =
          _random.nextBool()
              ? 'source/bubble_pop.mp3'
              : 'source/bubble_pop_alt.mp3';
      try {
        if (sound == 'source/bubble_pop.mp3' && _popPool != null) {
          _popPool!.start(volume: _sfxVolume);
        } else if (sound == 'source/bubble_pop_alt.mp3' &&
            _popAltPool != null) {
          _popAltPool!.start(volume: _sfxVolume);
        } else {
          // Fallback to direct playback if pools fail
          FlameAudio.play(sound, volume: _sfxVolume);
        }
      } catch (e) {
        print('Failed to play bubble pop sound: $e');
      }
    } else {
      // Fallback to system sound
      _playSystemSoundAsync();
    }
  }

  void _playSystemSoundAsync() async {
    try {
      // Vary the system sound for some variety
      final soundType = _random.nextInt(3);
      switch (soundType) {
        case 0:
          await SystemSound.play(SystemSoundType.click);
          break;
        case 1:
          await SystemSound.play(SystemSoundType.alert);
          break;
        default:
          await SystemSound.play(SystemSoundType.click);
      }
    } catch (e) {
      print('Failed to play system sound: $e');
    }
  }

  void _playHapticFeedbackAsync() async {
    if (!_isVibrationSupported) {
      // Silently skip haptic feedback on unsupported platforms
      return;
    }

    try {
      // Use Flutter's built-in HapticFeedback instead of vibration plugin
      await HapticFeedback.lightImpact();
    } catch (e) {
      print('Failed to play haptic feedback: $e');
      // Disable vibration support if it fails
      _isVibrationSupported = false;
    }
  }

  Future<void> playMenuMusic() async {
    if (!_musicEnabled || !_isAudioSupported) {
      if (!_isAudioSupported) {
        print('Menu music not available - using system audio only');
      }
      return;
    }

    try {
      // Get current theme
      final currentTheme = ThemeManager.effectiveTheme;
      final themeId = currentTheme.id;
      final menuMusicPath = 'menu/menu_$themeId.mp3';

      // Only change music if it's different from current
      if (_currentMenuMusic == menuMusicPath && _isMenuMusic) {
        print('Menu music already playing: $menuMusicPath');
        return;
      }

      // Stop any existing BGM first
      await FlameAudio.bgm.stop();

      // Play theme-based menu music
      FlameAudio.bgm.play(menuMusicPath, volume: _bgmVolume);
      _currentMenuMusic = menuMusicPath;
      _isMenuMusic = true;
      _currentIngameMusic = null;

      print('Menu music started: $menuMusicPath');
    } catch (e) {
      print('Failed to play menu music: $e');
    }
  }

  Future<void> playIngameMusic() async {
    if (!_musicEnabled || !_isAudioSupported) {
      if (!_isAudioSupported) {
        print('Ingame music not available - using system audio only');
      }
      return;
    }

    try {
      // Get current theme
      final currentTheme = ThemeManager.effectiveTheme;
      final themeId = currentTheme.id;

      // Get available tracks for this theme
      final availableTracks =
          _ingameMusicTracks[themeId] ?? _ingameMusicTracks['default']!;

      // Randomly select a track
      final selectedTrack =
          availableTracks[_random.nextInt(availableTracks.length)];

      // Only change music if it's different from current
      if (_currentIngameMusic == selectedTrack && !_isMenuMusic) {
        print('Ingame music already playing: $selectedTrack');
        return;
      }

      // Stop any existing BGM first
      await FlameAudio.bgm.stop();

      // Play randomly selected ingame music
      FlameAudio.bgm.play(selectedTrack, volume: _bgmVolume);
      _currentIngameMusic = selectedTrack;
      _isMenuMusic = false;
      _currentMenuMusic = null;

      print('Ingame music started: $selectedTrack (theme: $themeId)');
    } catch (e) {
      print('Failed to play ingame music: $e');
    }
  }

  Future<void> playBackgroundMusic() async {
    // Fallback method - defaults to menu music for compatibility
    await playMenuMusic();
  }

  Future<void> stopBackgroundMusic() async {
    if (!_isAudioSupported) return;

    try {
      await FlameAudio.bgm.stop();
      _currentMenuMusic = null;
      _currentIngameMusic = null;
      _isMenuMusic = false;
    } catch (e) {
      print('Failed to stop background music: $e');
    }
  }

  Future<void> pauseBackgroundMusic() async {
    if (!_isAudioSupported) return;

    try {
      FlameAudio.bgm.pause();
    } catch (e) {
      print('Failed to pause background music: $e');
    }
  }

  Future<void> resumeBackgroundMusic() async {
    if (!_musicEnabled || !_isAudioSupported) return;

    try {
      FlameAudio.bgm.resume();
    } catch (e) {
      print('Failed to resume background music: $e');
    }
  }

  void setSoundEnabled(bool enabled) {
    _soundEnabled = enabled;
  }

  void setMusicEnabled(bool enabled) {
    _musicEnabled = enabled;
    if (!enabled) {
      stopBackgroundMusic();
    } else {
      // Resume appropriate music based on context
      if (_isMenuMusic ||
          (_currentMenuMusic != null && _currentIngameMusic == null)) {
        playMenuMusic();
      } else {
        playIngameMusic();
      }
    }
  }

  void setBgmVolume(double volume) {
    _bgmVolume = volume;
    // Volume will be applied when music is next played
  }

  void setSfxVolume(double volume) {
    _sfxVolume = volume;
    // No effect with system audio
  }

  void setHapticEnabled(bool enabled) {
    _hapticEnabled = enabled;
  }

  Future<void> dispose() async {
    // Stop all audio immediately
    await stopBackgroundMusic();

    try {
      await FlameAudio.bgm.dispose();
    } catch (e) {
      print('Failed to dispose background player: $e');
    }

    try {
      await _popPool?.dispose();
      _popPool = null;
    } catch (e) {
      print('Failed to dispose popPool: $e');
    }

    try {
      await _popAltPool?.dispose();
      _popAltPool = null;
    } catch (e) {
      print('Failed to dispose popAltPool: $e');
    }

    // Clear all state
    _currentMenuMusic = null;
    _currentIngameMusic = null;
    _isMenuMusic = false;
  }

  // Utility method to get platform info for debugging
  String getPlatformInfo() {
    final audioType =
        _isAudioSupported ? 'Full Audio Support' : 'System Sounds Only';
    return 'Platform: ${Platform.operatingSystem}, '
        'Audio: $audioType, '
        'Vibration: $_isVibrationSupported';
  }
}