import 'package:flutter/material.dart';

import '../../model/location.dart';
import '../../model/repositories/interfaces/location_repository.dart';

class LocationController extends ChangeNotifier {
  LocationController(LocationRepository repository) : _repository = repository {
    _loadLocations();
  }

  final LocationRepository _repository;

  final List<Location> _locations = [];

  List<Location> get locations => _locations;

  Future<void> addLocation(Location location) {
    _locations.add(location);
    notifyListeners();
    return _repository.createLocation(location);
  }

  Future<void> deleteLocation(Location location) {
    _locations.remove(location);
    notifyListeners();
    return _repository.deleteLocation(location);
  }

  Future<void> updateLocation(Location oldLocation, Location newLocation) {
    final index = _locations.indexOf(oldLocation);
    _locations.remove(oldLocation);
    _locations.insert(index, newLocation);
    notifyListeners();
    return _repository
        .deleteLocation(oldLocation)
        .whenComplete(() => _repository.createLocation(newLocation));
  }

  Future<void> _loadLocations() {
    _locations.clear();
    return _repository.loadLocations().then(
      (value) => _locations.addAll(value),
    );
  }
}