/// 设备状态枚举
enum DeviceState {
  online,   // 在线
  offline,  // 离线
  warning,  // 警告
  unknown,  // 未知
}

/// 设备类型枚举
enum DeviceType {
  gateway,      // 网关/主路由
  bypass,       // 旁路由
  nas,          // NAS存储
  server,       // 服务器
  camera,       // 摄像头
  printer,      // 打印机
  other,        // 其他设备
}

/// 设备状态模型
class DeviceStatus {
  final String id;
  final String name;
  final DeviceType type;
  final String ip;
  final int port;
  final DeviceState state;
  final int? latency;         // 延迟(ms)
  final DateTime lastCheck;   // 最后检测时间
  final String? errorMessage; // 错误信息

  const DeviceStatus({
    required this.id,
    required this.name,
    required this.type,
    required this.ip,
    this.port = 80,
    this.state = DeviceState.unknown,
    this.latency,
    required this.lastCheck,
    this.errorMessage,
  });

  /// 从JSON创建
  factory DeviceStatus.fromJson(Map<String, dynamic> json) {
    return DeviceStatus(
      id: json['id'] as String,
      name: json['name'] as String,
      type: DeviceType.values.firstWhere(
        (e) => e.name == json['type'],
        orElse: () => DeviceType.other,
      ),
      ip: json['ip'] as String,
      port: json['port'] as int? ?? 80,
      state: DeviceState.values.firstWhere(
        (e) => e.name == json['state'],
        orElse: () => DeviceState.unknown,
      ),
      latency: json['latency'] as int?,
      lastCheck: DateTime.parse(json['lastCheck'] as String),
      errorMessage: json['errorMessage'] as String?,
    );
  }

  /// 转换为JSON
  Map<String, dynamic> toJson() {
    return {
      'id': id,
      'name': name,
      'type': type.name,
      'ip': ip,
      'port': port,
      'state': state.name,
      'latency': latency,
      'lastCheck': lastCheck.toIso8601String(),
      'errorMessage': errorMessage,
    };
  }

  /// 复制并更新
  DeviceStatus copyWith({
    String? id,
    String? name,
    DeviceType? type,
    String? ip,
    int? port,
    DeviceState? state,
    int? latency,
    DateTime? lastCheck,
    String? errorMessage,
  }) {
    return DeviceStatus(
      id: id ?? this.id,
      name: name ?? this.name,
      type: type ?? this.type,
      ip: ip ?? this.ip,
      port: port ?? this.port,
      state: state ?? this.state,
      latency: latency ?? this.latency,
      lastCheck: lastCheck ?? this.lastCheck,
      errorMessage: errorMessage ?? this.errorMessage,
    );
  }

  /// 是否在线
  bool get isOnline => state == DeviceState.online;

  /// 获取设备类型图标名称
  String get iconName {
    switch (type) {
      case DeviceType.gateway:
        return 'router';
      case DeviceType.bypass:
        return 'alt_route';
      case DeviceType.nas:
        return 'storage';
      case DeviceType.server:
        return 'dns';
      case DeviceType.camera:
        return 'videocam';
      case DeviceType.printer:
        return 'print';
      case DeviceType.other:
        return 'devices';
    }
  }
}