import 'dart:core';
import 'package:latlong2/latlong.dart';
import 'package:flutter/material.dart';

class Measurement {
  int measurementID;
  DateTime timeMeasured;
  Sensor sensor;
  String bodyOfWater;
  LatLng center;
  List <SubDiv> subDivs;

  Measurement({
    required this.measurementID,
    required this.timeMeasured,
    required this.sensor,
    required this.bodyOfWater,
    required this.center,
    required this.subDivs,
  });

  factory Measurement.fromJson(Map<String, dynamic> json) {
    if (json == null) {
      throw const FormatException('Error parsing Measurement: JSON data is null');
    }
    try {
      return Measurement(
        measurementID: json['MeasurementID'] ?? 0,
        timeMeasured: json['TimeMeasured'] != null
            ? DateTime.parse(json['TimeMeasured'])
            : DateTime(0),
        sensor:json['Sensor'] != null
            ? Sensor.fromJson(json['Sensor'])
            : Sensor.empty(),
        bodyOfWater: json['BodyOfWater'] != null ? json['BodyOfWater'].toString() : 'nil',
        center: LatLng(
          json['CenterLat'] != null ? json['CenterLat'].toDouble() : 0.0,
          json['CenterLon'] != null ? json['CenterLon'].toDouble() : 0.0,
        ),
        subDivs: (json['Subdivisions'] as List<dynamic>).map((data) => SubDiv.fromJson(data)).toList(),
      );
    } catch (e) {
      throw FormatException('Error parsing Measurement: $e');
    }
  }

}

class SubDiv {
  String sub_div_id;
  int groupID;
  double minThickness;
  double avgThickness;
  LatLng center;
  double accuracy;
  Color color;
  List<IceStats> iceStats;

  SubDiv({
    required this.sub_div_id,
    required this.groupID,
    required this.minThickness,
    required this.avgThickness,
    required this.center,
    required this.accuracy,
    required this.color,
    required this.iceStats,
  });

  factory SubDiv.fromJson(Map<String, dynamic> json) {
    try {
      return SubDiv(
        sub_div_id: json['SubdivID'].toString(),
        groupID: json['GroupID'] ?? 0,
        minThickness: json['MinThickness'] ?? 0,
        avgThickness: json['AvgThickness'] ?? 0,
        center: json['CenLatitude'] != null && json['CenLongitude'] != null
            ? LatLng(json['CenLatitude'], json['CenLongitude'])
            : LatLng(0.0, 0.0),
        accuracy: json['Accuracy'] ?? 0.0,
        // Set grey as default color
        color: json['Color'] != null ? Color(json['Color']) : Colors.grey,
        iceStats: (json['IceStats'] as List<dynamic>?)
            ?.map((data) => IceStats.fromJson(data))
            .toList() ?? [],
      );
    } catch (e) {
      throw FormatException('Error parsing SubDiv: $e');
    }
  }
}

class IceStats {
  DateTime dateTime;
  double slushIce;
  double blackIce;
  double totalIce;
  double snowDepth;
  double totalSnow;
  double cloudCover;
  double temperature;

  IceStats({
    required this.dateTime,
    required this.slushIce,
    required this.blackIce,
    required this.totalIce,
    required this.snowDepth,
    required this.totalSnow,
    required this.cloudCover,
    required this.temperature,
  });

  factory IceStats.fromJson(Map<String, dynamic>? json) {
    try {
      if (json == null) { // Return empty json
        return IceStats(
          dateTime: DateTime.now(),
          slushIce: 0.0,
          blackIce: 0.0,
          totalIce: 0.0,
          snowDepth: 0.0,
          totalSnow: 0.0,
          cloudCover: 0.0,
          temperature: 0.0,
        );
      }

      return IceStats(
        dateTime: DateTime.parse(json['Date']),
        slushIce: json['Slush ice (m)'] != null ? json['Slush ice (m)'].toDouble() : 0.0,
        blackIce: json['Black ice (m)'] != null ? json['Black ice (m)'].toDouble() : 0.0,
        totalIce: json['Total ice (m)'] != null ? json['Total ice (m)'].toDouble() : 0.0,
        snowDepth: json['Snow depth (m)'] != null ? json['Snow depth (m)'].toDouble() : 0.0,
        totalSnow: json['Total snow (m)'] != null ? json['Total snow (m)'].toDouble() : 0.0,
        cloudCover: json['Cloud cover'] != null ? json['Cloud cover'].toDouble() : 0.0,
        temperature: json['Temperature (t)'] != null ? json['Temperature (t)'].toDouble() : 0.0,
      );
    } catch (e) {
      throw FormatException('Error parsing IceStats: $e');
    }
  }
}

class Sensor {
  int sensorID;
  String sensorType;
  bool active;

  Sensor({
    required this.sensorID,
    required this.sensorType,
    required this.active,
  });

  Sensor.empty()
      : sensorID = 0,
        sensorType = '',
        active = false;

  factory Sensor.fromJson(Map<String, dynamic> json) {
    try {
      return Sensor(
        sensorID: json['SensorID'] ?? 0,
        sensorType: json['SensorType'] ?? 'nil',
        active: json['Active'] ?? true,
      );
    } catch (e) {
      throw FormatException('Error parsing Sensor: $e');
    }
  }
}