import 'package:flutter/cupertino.dart';
import 'package:flutter_screenutil/flutter_screenutil.dart';
import 'package:yumi/app/constants/sc_global_config.dart';
import 'package:yumi/main.dart';
import 'package:provider/provider.dart';
import 'package:yumi/shared/tools/sc_entrance_vap_svga_manager.dart';
import 'package:yumi/services/audio/rtc_manager.dart';
import 'package:yumi/ui_kit/widgets/room/floating/floating_game_screen_widget.dart';
import 'package:yumi/ui_kit/widgets/room/floating/floating_gift_screen_widget.dart';
import 'package:yumi/ui_kit/widgets/room/floating/floating_luck_gift_screen_widget.dart';
import 'package:yumi/ui_kit/widgets/room/floating/floating_room_redenvelope_screen_widget.dart';
import 'package:yumi/ui_kit/widgets/room/floating/floating_room_rocket_screen_widget.dart';
import 'package:yumi/shared/data_sources/models/message/sc_floating_message.dart';

typedef FloatingScreenManager = OverlayManager;

class OverlayManager {
  final SCPriorityQueue<SCFloatingMessage> _messageQueue = SCPriorityQueue(
    (a, b) => b.priority.compareTo(a.priority),
  );
  bool _isPlaying = false;
  OverlayEntry? _currentOverlayEntry;

  bool _isProcessing = false;
  bool _isDisposed = false;

  static final OverlayManager _instance =
      OverlayManager._internal();

  factory OverlayManager() => _instance;

  OverlayManager._internal();

  void addMessage(SCFloatingMessage message) {
    if (_isDisposed) return;
    if (SCGlobalConfig.isFloatingAnimationInGlobal) {
      _messageQueue.add(message);
      _safeScheduleNext();
    } else {
      _messageQueue.clear();
     _isPlaying = false;
      _isProcessing = false;
     _isDisposed = false;
    }
  }

  void _safeScheduleNext() {
    if (_isProcessing || _isPlaying || _messageQueue.isEmpty) return;
    _isProcessing = true;

    try {
      _scheduleNext();
    } finally {
      _isProcessing = false;
    }
  }

  void _scheduleNext() {
    if (_isPlaying || _messageQueue.isEmpty || _isDisposed) return;

    try {
      final context = navigatorKey.currentState?.context;
      if (context == null || !context.mounted) return;

      // 安全地获取第一个消息
      if (_messageQueue.isEmpty) return;
      final messageToProcess = _messageQueue.first;

      if (messageToProcess?.type == 1) {
        final rtcProvider = Provider.of<RealTimeCommunicationManager>(context, listen: false);
        if (rtcProvider.currenRoom == null) {
          // 从队列中移除第一个元素
          _messageQueue.removeFirst();
          _safeScheduleNext();
          return;
        }
      }

      // 安全地移除并播放消息
      final messageToPlay = _messageQueue.removeFirst();
      _playMessage(messageToPlay);
    } catch (e) {
      debugPrint('播放悬浮消息出错: $e');
      _isPlaying = false;
      _safeScheduleNext();
    }
  }

  void _playMessage(SCFloatingMessage message) {
    _isPlaying = true;
    final context = navigatorKey.currentState?.context;
    if (context == null || !context.mounted) {
      _isPlaying = false;
      _safeScheduleNext();
      return;
    }

    _currentOverlayEntry = OverlayEntry(
      builder:
          (_) => Align(
            alignment: AlignmentDirectional.topStart,
            child: Transform.translate(
              offset: Offset(0, 70.w),
              child: _buildScreenWidget(message),
            ),
          ),
    );

    Overlay.of(context)?.insert(_currentOverlayEntry!);
  }

  Widget _buildScreenWidget(SCFloatingMessage message) {
    bool completed = false;

    void onComplete() {
      if (completed) return;
      completed = true;

      try {
        _currentOverlayEntry?.remove();
        _currentOverlayEntry = null;
        _isPlaying = false;
        _safeScheduleNext();
      } catch (e) {
        debugPrint('清理悬浮消息出错: $e');
        _isPlaying = false;
        _safeScheduleNext();
      }
    }

    switch (message.type) {
      case 0:
        return FloatingLuckGiftScreenWidget(
          message: message,
          onAnimationCompleted: onComplete,
        );
      case 1:
        //房间礼物
        return FloatingGiftScreenWidget(
          message: message,
          onAnimationCompleted: onComplete,
        );
      case 2:
        //游戏中奖
        return FloatingGameScreenWidget(
          message: message,
          onAnimationCompleted: onComplete,
        );
      case 3:
        //火箭
        return FloatingRoomRocketScreenWidget(
          message: message,
          onAnimationCompleted: onComplete,
        );
      case 4:
        //红包
        return FloatingRoomRedenvelopeScreenWidget(
          message: message,
          onAnimationCompleted: onComplete,
        );
      default:
        onComplete();
        return Container();
    }
  }

  void activate() {
    _isDisposed = false;
  }

  void dispose() {
    _isDisposed = true;
    _currentOverlayEntry?.remove();
    _currentOverlayEntry = null;
    _messageQueue.clear();
    _isPlaying = false;
    _isProcessing = false;
  }

  void removeRoom() {
    // 正确地从 PriorityQueue 中移除特定类型的消息
    _removeMessagesByType(1);
  }

  // 辅助方法：移除特定类型的消息
  void _removeMessagesByType(int type) {
    // 由于 PriorityQueue 没有直接的方法来移除特定元素，
    // 我们需要重建队列，排除指定类型的消息
    final newQueue = SCPriorityQueue<SCFloatingMessage>(
      (a, b) => b.priority.compareTo(a.priority),
    );

    // 遍历原始队列，只添加非指定类型的消息
    while (_messageQueue.isNotEmpty) {
      final message = _messageQueue.removeFirst();
      if (message.type != type) {
        newQueue.add(message);
      }
    }

    // 将新队列赋值给原队列
    while (newQueue.isNotEmpty) {
      _messageQueue.add(newQueue.removeFirst());
    }
  }

  // 辅助方法：获取队列信息
  int get queueLength => _messageQueue.length;

  bool get isPlaying => _isPlaying;
}