water-management-system/lib/services/water_service.dart

import 'package:dio/dio.dart';
import 'package:water_management_system/models/water_data_model.dart';
import 'package:water_management_system/utils/constants.dart';

class WaterService {
  final Dio _dio = Dio(BaseOptions(baseUrl: AppConstants.baseUrl));

  Future<List<WaterDataModel>> getWaterData({
    String area = '全部区域',
    DateTime? date,
  }) async {
    try {
      final response = await _dio.get(AppConstants.waterDataEndpoint, queryParameters: {
        'area': area,
        'date': date?.toIso8601String(),
      });
      if (response.statusCode == 200) {
        final List<dynamic> data = response.data['data'] ?? [];
        return data.map((item) => WaterDataModel.fromJson(item)).toList();
      }
      return [];
    } catch (e) {
      return _getMockData();
    }
  }

  List<WaterDataModel> _getMockData() {
    return [
      WaterDataModel(deviceId: 'D001', deviceName: 'A区泵站', area: '东区', pressure: 0.35, flowRate: 120.5, temperature: 22.0, status: 'normal', updateTime: DateTime.now(), batteryLevel: 95.0, location: '116.3,39.9'),
      WaterDataModel(deviceId: 'D002', deviceName: 'B区水塔', area: '西区', pressure: 0.42, flowRate: 150.0, temperature: 23.0, status: 'warning', updateTime: DateTime.now().subtract(const Duration(minutes: 30)), batteryLevel: 78.0, location: '116.4,39.8'),
      WaterDataModel(deviceId: 'D003', deviceName: 'C区阀门', area: '南区', pressure: 0.28, flowRate: 85.0, temperature: 21.0, status: 'error', updateTime: DateTime.now().subtract(const Duration(hours: 2)), batteryLevel: 45.0, location: '116.2,39.7'),
    ];
  }
}