import 'package:get/get.dart';
import 'dart:async';
import '../../../routes/app_routes.dart';
import '../../../core/utils/logger.dart';
import 'package:flutter/material.dart';
import '../../explore/controllers/explore_controller.dart';
import 'package:classic_bluetooth/classic_bluetooth.dart';

// 连接状态枚举
enum ConnectionStatus {
  disconnected, // 未连接
  connecting, // 连接中
  connected, // 已连接
  failed // 连接失败
}

class HomeController extends GetxController {
  static HomeController get to => Get.find();
  final ExploreController exploreController = Get.find<ExploreController>();

  // 连接状态
  final _connectionStatus = ConnectionStatus.disconnected.obs;
  ConnectionStatus get connectionStatus => _connectionStatus.value;

  // 电池状态（模拟数据）
  final _deviceBattery = Rx<int?>(null);
  int? get deviceBattery => _deviceBattery.value;

  // 固件版本（模拟数据）
  final String firmwareVersion = 'v2.4.1';

  // 连接错误信息
  final _connectionErrorMsg = ''.obs;
  String get connectionErrorMsg => _connectionErrorMsg.value;

  // 蓝牙状态和设备信息
  final _bluetoothState = 'unknown'.obs;
  String get bluetoothState => _bluetoothState.value;
  
  final Rx<BluetoothDevice?> _currentDevice = Rx<BluetoothDevice?>(null);
  BluetoothDevice? get currentDevice => _currentDevice.value;
  
  // 蓝牙事件订阅
  StreamSubscription<BluetoothEvent>? _bluetoothSubscription;
  
  // 蓝牙是否已连接
  bool get isConnected => currentDevice != null;

  @override
  void onInit() {
    super.onInit();

    // 初始化
    _initBluetooth();
    
    // 电池模拟更新
    _simulateBatteryUpdate();
  }
  
  @override
  void onClose() {
    _bluetoothSubscription?.cancel();
    super.onClose();
  }

  // 初始化蓝牙
  Future<void> _initBluetooth() async {
    try {
      _connectionStatus.value = ConnectionStatus.connecting;
      
      // 检查蓝牙状态
      final isEnabled = await ClassicBluetooth.isBluetoothEnabled();
      _bluetoothState.value = isEnabled ? 'on' : 'off';
      
      if (!isEnabled) {
        _connectionStatus.value = ConnectionStatus.disconnected;
        _connectionErrorMsg.value = '蓝牙未开启';
        return;
      }

      // 设置蓝牙事件监听
      _setupBluetoothListener();
      
      // 获取已连接设备
      await refreshDeviceConnection();
      
    } catch (e) {
      Logger.error('初始化蓝牙失败: $e');
      _connectionStatus.value = ConnectionStatus.failed;
      _connectionErrorMsg.value = e.toString();
    }
  }

  // 设置蓝牙事件监听
  void _setupBluetoothListener() {
    _bluetoothSubscription?.cancel();
    
    _bluetoothSubscription = ClassicBluetooth.events.listen((event) {
      if (event.type == 'stateChanged' && event.state != null) {
        _bluetoothState.value = event.state!;
        
        // 如果蓝牙关闭，清空设备信息
        if (event.state == 'off') {
          _currentDevice.value = null;
          _connectionErrorMsg.value = '蓝牙未开启';
        }
        
        _updateConnectionStatus();
      } else if (event.type == 'deviceConnected' && event.device != null) {
        final newDevice = event.device!;
        
        // 更新当前设备
        _currentDevice.value = newDevice;
        _connectionErrorMsg.value = '';
        _updateConnectionStatus();
      } else if (event.type == 'deviceDisconnected' && event.device != null) {
        final disconnectedDevice = event.device!;
        
        // 如果断开的是当前设备，清除当前设备
        if (_currentDevice.value?.address == disconnectedDevice.address) {
          _currentDevice.value = null;
          _connectionErrorMsg.value = '设备已断开连接';
        }
        
        _updateConnectionStatus();
      }
    }, onError: (error) {
      Logger.error('蓝牙事件流错误: $error');
    });
  }

  // 更新连接状态
  void _updateConnectionStatus() {
    if (bluetoothState == 'off') {
      _connectionStatus.value = ConnectionStatus.disconnected;
      _deviceBattery.value = null;
      update();
      return;
    }

    if (currentDevice != null) {
      _connectionStatus.value = ConnectionStatus.connected;
    } else {
      _connectionStatus.value = ConnectionStatus.disconnected;
      _deviceBattery.value = null;
    }
    
    update();
  }

  // 刷新设备连接
  Future<void> refreshDeviceConnection() async {
    try {
      _connectionStatus.value = ConnectionStatus.connecting;
      update();
      
      final devices = await ClassicBluetooth.getConnectedDevices();
      
      if (devices.isNotEmpty) {
        _currentDevice.value = devices.first;
        _connectionErrorMsg.value = '';
      } else {
        _currentDevice.value = null;
        _connectionErrorMsg.value = '未找到已连接的设备';
      }
    } catch (e) {
      Logger.error('刷新设备连接失败: $e');
      _connectionErrorMsg.value = '无法刷新设备连接';
    } finally {
      _updateConnectionStatus();
    }
  }

  // 电池电量模拟更新
  void _simulateBatteryUpdate() {
    Future.delayed(const Duration(seconds: 2), () {
      if (isConnected) {
        final timestamp = DateTime.now().millisecondsSinceEpoch;
        _deviceBattery.value = 50 + (timestamp % 50); // 50-99的随机值
      } else {
        _deviceBattery.value = null;
      }

      // 递归调用实现定时更新
      _simulateBatteryUpdate();
    });
  }

  // 重新扫描设备
  void rescanDevices() {
    Get.toNamed(Routes.pairing);
  }

  // 打开翻译功能
  void openTranslation() {
    Get.toNamed(Routes.translation);
  }

  // 打开AI伴侣功能
  void openAIGirlfriend() {
    exploreController.onAIFeatureTap(2); //进入AI女友页面
  }

  // 展示AI功能
  void exploreAIFeatures() {
    Get.toNamed(Routes.chat);
  }

  // 获取连接状态对应的颜色
  Color getConnectionStatusColor() {
    switch (_connectionStatus.value) {
      case ConnectionStatus.connected:
        return Colors.green;
      case ConnectionStatus.connecting:
        return Colors.amber;
      case ConnectionStatus.failed:
        return Colors.red;
      case ConnectionStatus.disconnected:
      default:
        return Colors.grey;
    }
  }

  // 获取连接状态对应的文本
  String getConnectionStatusText() {
    // 如果蓝牙关闭，优先显示蓝牙状态
    if (bluetoothState == 'off') {
      return 'bluetoothOff'.tr; // 蓝牙已关闭
    }

    switch (_connectionStatus.value) {
      case ConnectionStatus.connected:
        return 'connected'.tr; // 已连接
      case ConnectionStatus.connecting:
        return 'connecting'.tr; // 连接中...
      case ConnectionStatus.failed:
        return 'connectionFailure'.tr; // 连接失败
      case ConnectionStatus.disconnected:
      default:
        return 'unconnected'.tr; // 未连接
    }
  }

  // 获取设备名称
  String getDeviceName() {
    return currentDevice?.name ?? 'unknownEquipment'.tr; // 未知设备
  }

  // 获取信号强度（模拟数据）
  String getSignalStrength() {
    if (!isConnected) {
      return 'zeroSignal'.tr; // 无信号
    }

    // 简单模拟信号强度
    final random = DateTime.now().millisecondsSinceEpoch % 3;
    switch (random) {
      case 0:
        return 'good'.tr; // 良好
      case 1:
        return 'fine'.tr; // 很好
      default:
        return 'excellent'.tr; // 极佳
    }
  }

  // 获取设备ID
  String getDeviceId() {
    return currentDevice?.address ?? 'unknown'.tr; // 未知
  }
}