water-management-system/lib/models/water_data_model.dart

import 'package:intl/intl.dart';

class WaterDataModel {
  final String deviceId;
  final String deviceName;
  final String area;
  final double pressure;
  final double flowRate;
  final double temperature;
  final String status;
  final DateTime updateTime;
  final double batteryLevel;
  final String location;

  WaterDataModel({
    required this.deviceId,
    required this.deviceName,
    required this.area,
    required this.pressure,
    required this.flowRate,
    required this.temperature,
    required this.status,
    required this.updateTime,
    required this.batteryLevel,
    required this.location,
  });

  // 从JSON创建对象
  factory WaterDataModel.fromJson(Map<String, dynamic> json) {
    return WaterDataModel(
      deviceId: json['device_id'] ?? '',
      deviceName: json['device_name'] ?? '',
      area: json['area'] ?? '',
      pressure: (json['pressure'] ?? 0.0).toDouble(),
      flowRate: (json['flow_rate'] ?? 0.0).toDouble(),
      temperature: (json['temperature'] ?? 0.0).toDouble(),
      status: json['status'] ?? 'unknown',
      updateTime: json['update_time'] != null 
          ? DateTime.parse(json['update_time'])
          : DateTime.now(),
      batteryLevel: (json['battery_level'] ?? 100.0).toDouble(),
      location: json['location'] ?? '',
    );
  }

  // 转换为JSON
  Map<String, dynamic> toJson() {
    return {
      'device_id': deviceId,
      'device_name': deviceName,
      'area': area,
      'pressure': pressure,
      'flow_rate': flowRate,
      'temperature': temperature,
      'status': status,
      'update_time': updateTime.toIso8601String(),
      'battery_level': batteryLevel,
      'location': location,
    };
  }

  // 获取状态显示颜色
  Color getStatusColor() {
    switch (status) {
      case 'normal':
        return const Color(0xFF4CAF50);
      case 'warning':
        return const Color(0xFFFF9800);
      case 'error':
        return const Color(0xFFF44336);
      default:
        return const Color(0xFF9E9E9E);
    }
  }

  // 获取状态显示文本
  String getStatusText() {
    switch (status) {
      case 'normal':
        return '正常';
      case 'warning':
        return '警告';
      case 'error':
        return '故障';
      default:
        return '未知';
    }
  }

  // 检查是否需要警告
  bool get needsWarning {
    return status == 'warning' || status == 'error';
  }

  // 获取电池状态
  String getBatteryStatus() {
    if (batteryLevel > 80) return '充足';
    if (batteryLevel > 50) return '正常';
    if (batteryLevel > 20) return '低电量';
    return '严重不足';
  }

  // 克隆对象并更新部分字段
  WaterDataModel copyWith({
    String? deviceId,
    String? deviceName,
    String? area,
    double? pressure,
    double? flowRate,
    double? temperature,
    String? status,
    DateTime? updateTime,
    double? batteryLevel,
    String? location,
  }) {
    return WaterDataModel(
      deviceId: deviceId ?? this.deviceId,
      deviceName: deviceName ?? this.deviceName,
      area: area ?? this.area,
      pressure: pressure ?? this.pressure,
      flowRate: flowRate ?? this.flowRate,
      temperature: temperature ?? this.temperature,
      status: status ?? this.status,
      updateTime: updateTime ?? this.updateTime,
      batteryLevel: batteryLevel ?? this.batteryLevel,
      location: location ?? this.location,
    );
  }

  @override
  String toString() {
    return 'WaterDataModel('
        'deviceId: $deviceId, '
        'deviceName: $deviceName, '
        'area: $area, '
        'pressure: $pressure, '
        'flowRate: $flowRate, '
        'temperature: $temperature, '
        'status: $status, '
        'updateTime: ${DateFormat('yyyy-MM-dd HH:mm:ss').format(updateTime)}, '
        'batteryLevel: $batteryLevel, '
        'location: $location)';
  }

  @override
  bool operator ==(Object other) {
    if (identical(this, other)) return true;
    return other is WaterDataModel &&
        other.deviceId == deviceId &&
        other.deviceName == deviceName &&
        other.area == area &&
        other.pressure == pressure &&
        other.flowRate == flowRate &&
        other.temperature == temperature &&
        other.status == status &&
        other.updateTime == updateTime &&
        other.batteryLevel == batteryLevel &&
        other.location == location;
  }

  @override
  int get hashCode {
    return Object.hash(
      deviceId,
      deviceName,
      area,
      pressure,
      flowRate,
      temperature,
      status,
      updateTime,
      batteryLevel,
      location,
    );
  }
}