info_tren/lib/models/train_data.dart

// To parse this JSON data, do
//
//     final trainData = trainDataFromJson(jsonString);

import 'dart:convert';

TrainData trainDataFromJson(String str) => TrainData.fromJson(json.decode(str));

String trainDataToJson(TrainData data) => json.encode(data.toJson());

/// Results of scrapping InfoFer website for train info
class TrainData {
  TrainData({
    required this.date,
    required this.number,
    required this.operator,
    required this.rank,
    required this.route,
    required this.stations,
    this.status,
  });

  final String date;
  final String number;
  final String operator;
  final String rank;
  final Route route;
  final List<Station> stations;
  final TrainDataStatus? status;

  factory TrainData.fromJson(Map<String, dynamic> json) => TrainData(
        date: json["date"],
        number: json["number"],
        operator: json["operator"],
        rank: json["rank"],
        route: Route.fromJson(json["route"]),
        stations: List<Station>.from(
            json["stations"].map((x) => Station.fromJson(x))),
        status: json["status"] == null
            ? null
            : TrainDataStatus.fromJson(json["status"]),
      );

  Map<String, dynamic> toJson() => {
        "date": date,
        "number": number,
        "operator": operator,
        "rank": rank,
        "route": route.toJson(),
        "stations": List<dynamic>.from(stations.map((x) => x.toJson())),
        "status": status?.toJson(),
      };
}

/// Route of the train
class Route {
  Route({
    required this.from,
    required this.to,
  });

  final String from;
  final String to;

  factory Route.fromJson(Map<String, dynamic> json) => Route(
        from: json["from"],
        to: json["to"],
      );

  Map<String, dynamic> toJson() => {
        "from": from,
        "to": to,
      };
}

class Station {
  Station({
    this.arrival,
    this.departure,
    required this.km,
    required this.name,
    this.platform,
    this.stoppingTime,
  });

  final StationArrDepTime? arrival;
  final StationArrDepTime? departure;
  final int km;
  final String name;
  final String? platform;
  final int? stoppingTime;

  factory Station.fromJson(Map<String, dynamic> json) => Station(
        arrival: json["arrival"] == null
            ? null
            : StationArrDepTime.fromJson(json["arrival"]),
        departure: json["departure"] == null
            ? null
            : StationArrDepTime.fromJson(json["departure"]),
        km: json["km"],
        name: json["name"],
        platform: json["platform"] == null ? null : json["platform"],
        stoppingTime:
            json["stoppingTime"] == null ? null : json["stoppingTime"],
      );

  Map<String, dynamic> toJson() => {
        "arrival": arrival?.toJson(),
        "departure": departure?.toJson(),
        "km": km,
        "name": name,
        "platform": platform == null ? null : platform,
        "stoppingTime": stoppingTime == null ? null : stoppingTime,
      };
}

class StationArrDepTime {
  StationArrDepTime({
    required this.scheduleTime,
    this.status,
  });

  final String scheduleTime;
  final StationArrDepTimeStatus? status;

  factory StationArrDepTime.fromJson(Map<String, dynamic> json) =>
      StationArrDepTime(
        scheduleTime: json["scheduleTime"],
        status: json["status"] == null ? null : StationArrDepTimeStatus.fromJson(json["status"]),
      );

  Map<String, dynamic> toJson() => {
        "scheduleTime": scheduleTime,
        "status": status?.toJson(),
      };
}

class StationArrDepTimeStatus {
  StationArrDepTimeStatus({
    required this.delay,
    required this.real,
  });

  final int delay;
  final bool real;

  factory StationArrDepTimeStatus.fromJson(Map<String, dynamic> json) =>
      StationArrDepTimeStatus(
        delay: json["delay"],
        real: json["real"],
      );

  Map<String, dynamic> toJson() => {
        "delay": delay,
        "real": real,
      };
}

class TrainDataStatus {
  TrainDataStatus({
    required this.delay,
    required this.state,
    required this.station,
  });

  final int delay;
  final State state;
  final String station;

  factory TrainDataStatus.fromJson(Map<String, dynamic> json) =>
      TrainDataStatus(
        delay: json["delay"],
        state: stateValues.map[json["state"]]!,
        station: json["station"],
      );

  Map<String, dynamic> toJson() => {
        "delay": delay,
        "state": stateValues.reverse[state],
        "station": station,
      };

  @override
  String toString() {
    String result = '';
    if (delay == 0) {
      result += 'La timp';
    }
    else {
      result += '${delay.abs()} min';
    }
    result += ' la ';
    switch (state) {
      case State.PASSING:
        result += 'trecerea fără oprire prin';
        break;
      case State.ARRIVAL:
        result += 'sosirea în';
        break;
      case State.DEPARTURE:
        result += 'plecarea din';
        break;
    }
    result += station;
    return result;
  }
}

enum State { PASSING, ARRIVAL, DEPARTURE }

final stateValues = EnumValues({
  "arrival": State.ARRIVAL,
  "departure": State.DEPARTURE,
  "passing": State.PASSING
});

class EnumValues<T> {
  Map<String, T> map;
  Map<T, String>? reverseMap;

  EnumValues(this.map);

  Map<T, String> get reverse {
    if (reverseMap == null) {
      reverseMap = map.map((k, v) => new MapEntry(v, k));
    }
    return reverseMap!;
  }
}