import 'package:deep_voice/data/services/voice_interaction_service.dart';
import 'package:get/get.dart';
import 'dart:async';
import '../../../routes/app_routes.dart';
import '../../../data/services/classic_bluetooth_service.dart';
import '../../../core/utils/logger.dart';
import 'package:flutter/material.dart';
import 'package:permission_handler/permission_handler.dart';
import 'package:app_settings/app_settings.dart';
import 'package:flutter/services.dart';


/// 简化的配对控制器，仅用于显示已连接经典蓝牙设备和处理基本配对流程
class PairingController extends GetxController {
  static PairingController get to => Get.find();
  
  // 经典蓝牙服务
  late ClassicBluetoothService _bluetoothService;
  
  // 是否开始搜索
  final _isSearching = false.obs;
  bool get isSearching => _isSearching.value;
  
  // 设备连接状态
  final _isConnecting = false.obs;
  bool get isConnecting => _isConnecting.value;
  
  // 蓝牙服务是否可用
  final _isBluetoothServiceAvailable = true.obs;
  bool get isBluetoothServiceAvailable => _isBluetoothServiceAvailable.value;
  
  // 当前连接设备
  Rx<BluetoothDevice?> get currentDevice => _bluetoothService.currentDevice;
  
  // 连接设备列表
  RxList<BluetoothDevice> get connectedDevices => _bluetoothService.connectedDevices;
  
  // 蓝牙状态
  RxString get bluetoothState => _bluetoothService.bluetoothState;
  
  // 错误信息
  final errorMessage = ''.obs;
  
  // 连接设备列表（兼容旧代码）
  List<BluetoothDevice> get connectedClassicDevices => 
      _bluetoothService.currentDevice.value != null 
          ? [_bluetoothService.currentDevice.value!] 
          : [];
  
  // 状态描述（用于UI显示）
  final statusDescription = '正在初始化...'.obs;
  
  // 加载状态
  final isLoading = false.obs;
  
  // 是否正在跳转到主页
  bool _isNavigatingToHome = false;
  
  @override
  void onInit() {
    super.onInit();
    _initialize();
  }
  /// 设置状态变化监听
  void _setupStatusListeners() {
    if (!_isBluetoothServiceAvailable.value) return;
    
    // 监听蓝牙开关状态
    ever(_bluetoothService.bluetoothState, (state) {
      _updateStatusDescription();
    });
    
    // 监听当前设备状态
    ever(_bluetoothService.currentDevice, (device) {
      _updateStatusDescription();
      
      // 如果有设备连接，自动跳转到主页
      if (device != null) {
        _autoNavigateToHome();
      }
    });
  }
  
  /// 更新状态描述
  void _updateStatusDescription() {
    if (_bluetoothService.bluetoothState.value == 'off') {
      statusDescription.value = '蓝牙已关闭，请打开蓝牙';
      return;
    }
    
    if (_bluetoothService.currentDevice.value != null) {
      statusDescription.value = '已连接到设备: ${_bluetoothService.currentDevice.value!.name}';
      return;
    }
    
    if (_bluetoothService.connectedDevices.isNotEmpty) {
      statusDescription.value = '找到已连接的设备: ${_bluetoothService.connectedDevices.first.name}';
      return;
    }
    
    if (isLoading.value) {
      statusDescription.value = '正在搜索设备...';
      return;
    }
    
    statusDescription.value = '未找到已连接的蓝牙设备';
  }

  /// 初始化流程
  Future<void> _initialize() async {
    try {
      // 初始化语音交互服务
      VoiceInteractionService.to.initialize();
      VoiceInteractionService.to.startService();

      isLoading.value = true;
      statusDescription.value = '正在初始化...';
      
      // 获取蓝牙服务
      _bluetoothService = Get.find<ClassicBluetoothService>();
      
      // 确保蓝牙服务已初始化
      if (!await _bluetoothService.initialize()) {
        Logger.error('蓝牙服务初始化失败');
        statusDescription.value = '蓝牙服务初始化失败';
        _isBluetoothServiceAvailable.value = false;
        isLoading.value = false;
        return;
      }
      _setupStatusListeners();
      // 检查权限
      // statusDescription.value = '正在检查权限...';
      // final hasPermission = await _bluetoothService.checkPermissions();
      // if (!hasPermission) {
      //   statusDescription.value = '缺少蓝牙权限';
      //   isLoading.value = false;
      //   return;
      // }
      
      // 刷新设备列表
      statusDescription.value = '正在搜索设备...';
      await refreshConnectedDevices();
      
      // 更新状态描述
      _updateStatusDescription();
      
    } catch (e) {
      Logger.error('初始化配对控制器失败: $e');
      statusDescription.value = '初始化失败';
      _isBluetoothServiceAvailable.value = false;
    } finally {
      isLoading.value = false;
    }
  }
  
  /// 刷新设备
  Future<void> refreshConnectedDevices() async {
    try {
      isLoading.value = true;
      statusDescription.value = '正在搜索设备...';
      
      final hasDevices = await _bluetoothService.refreshConnectedDevices();
      
      // 更新状态描述
      _updateStatusDescription();
      
    } catch (e) {
      Logger.error('刷新设备失败: $e');
      statusDescription.value = '刷新设备失败';
    } finally {
      isLoading.value = false;
    }
  }
  
  /// 自动跳转到主页
  void _autoNavigateToHome() {
    // 如果已经在跳转或设备列表为空，则不执行
    if (_isNavigatingToHome || _bluetoothService.connectedDevices.isEmpty) return;
    
    // 设置跳转标志
    _isNavigatingToHome = true;
    
    Logger.info('已找到连接的设备，自动跳转到主页');
    
    Future.delayed(const Duration(milliseconds: 500), () {
      Get.offAllNamed(Routes.home);
    });
  }
  
  /// 打开系统蓝牙设置
  void openBluetoothSettings() {
    try {
      // 使用app_settings插件打开蓝牙设置
      AppSettings.openAppSettings(type: AppSettingsType.bluetooth);
    } catch (e) {
      Logger.error('打开蓝牙设置失败: $e');
    }
  }
  
  /// 刷新设备（兼容旧代码）
  Future<void> refreshDevices() async {
    await refreshConnectedDevices();
  }
  
  /// 跳过连接
  void skipConnecting() {
    // 设置跳转标志防止自动跳转再次触发
    _isNavigatingToHome = true;
    Get.offAllNamed(Routes.home);
  }
}