import 'dart:async';
import 'package:flutter/foundation.dart';
import '../models/models.dart';
import '../services/services.dart';

/// 监控状态管理
class MonitorProvider extends ChangeNotifier {
  final NetworkService _networkService = NetworkService();
  final SpeedTestService _speedTestService = SpeedTestService();

  // 状态
  NetworkStatus _networkStatus = NetworkStatus.initial();
  List<DeviceStatus> _devices = [];
  bool _isLoading = false;
  bool _isTestingSpeed = false;
  String? _errorMessage;
  
  // 定时器
  Timer? _autoRefreshTimer;
  int _refreshInterval = 30; // 秒

  // Getters
  NetworkStatus get networkStatus => _networkStatus;
  List<DeviceStatus> get devices => _devices;
  bool get isLoading => _isLoading;
  bool get isTestingSpeed => _isTestingSpeed;
  String? get errorMessage => _errorMessage;
  int get refreshInterval => _refreshInterval;
  
  // 在线设备数量
  int get onlineDevicesCount => 
      _devices.where((d) => d.isOnline).length;
  
  // 离线设备数量
  int get offlineDevicesCount => 
      _devices.where((d) => d.state == DeviceState.offline).length;

  /// 初始化默认设备列表
  void initDefaultDevices() {
    _devices = [
      DeviceStatus(
        id: '1',
        name: '主路由器',
        type: DeviceType.gateway,
        ip: '192.168.1.1',
        port: 80,
        lastCheck: DateTime.now(),
      ),
      DeviceStatus(
        id: '2',
        name: '旁路由',
        type: DeviceType.bypass,
        ip: '192.168.1.2',
        port: 80,
        lastCheck: DateTime.now(),
      ),
      DeviceStatus(
        id: '3',
        name: 'NAS',
        type: DeviceType.nas,
        ip: '192.168.1.100',
        port: 5000,
        lastCheck: DateTime.now(),
      ),
    ];
    notifyListeners();
  }

  /// 添加设备
  void addDevice(DeviceStatus device) {
    _devices.add(device);
    notifyListeners();
  }

  /// 移除设备
  void removeDevice(String id) {
    _devices.removeWhere((d) => d.id == id);
    notifyListeners();
  }

  /// 更新设备
  void updateDevice(DeviceStatus device) {
    final index = _devices.indexWhere((d) => d.id == device.id);
    if (index != -1) {
      _devices[index] = device;
      notifyListeners();
    }
  }

  /// 刷新所有状态
  Future<void> refreshAll() async {
    _isLoading = true;
    _errorMessage = null;
    notifyListeners();

    try {
      // 检测网络状态
      _networkStatus = await _speedTestService.quickCheck();
      
      // 检测所有设备
      if (_devices.isNotEmpty) {
        _devices = await _networkService.checkAllDevices(_devices);
      }
    } catch (e) {
      _errorMessage = e.toString();
    } finally {
      _isLoading = false;
      notifyListeners();
    }
  }

  /// 运行网速测试
  Future<void> runSpeedTest() async {
    _isTestingSpeed = true;
    notifyListeners();

    try {
      _networkStatus = await _speedTestService.runFullTest();
    } catch (e) {
      _errorMessage = e.toString();
    } finally {
      _isTestingSpeed = false;
      notifyListeners();
    }
  }

  /// 检测单个设备
  Future<void> checkSingleDevice(String deviceId) async {
    final index = _devices.indexWhere((d) => d.id == deviceId);
    if (index == -1) return;

    final device = _devices[index];
    final updatedDevice = await _networkService.checkDevice(device);
    _devices[index] = updatedDevice;
    notifyListeners();
  }

  /// 启动自动刷新
  void startAutoRefresh({int intervalSeconds = 30}) {
    _refreshInterval = intervalSeconds;
    stopAutoRefresh();
    
    _autoRefreshTimer = Timer.periodic(
      Duration(seconds: intervalSeconds),
      (_) => refreshAll(),
    );
  }

  /// 停止自动刷新
  void stopAutoRefresh() {
    _autoRefreshTimer?.cancel();
    _autoRefreshTimer = null;
  }

  /// 设置刷新间隔
  void setRefreshInterval(int seconds) {
    _refreshInterval = seconds;
    if (_autoRefreshTimer != null) {
      startAutoRefresh(intervalSeconds: seconds);
    }
    notifyListeners();
  }

  @override
  void dispose() {
    stopAutoRefresh();
    super.dispose();
  }
}