info_tren/lib/providers.dart

import 'dart:async';

import 'package:hooks_riverpod/hooks_riverpod.dart';
import 'package:info_tren/api/station_data.dart';
import 'package:info_tren/models.dart';
import 'package:info_tren/pages/station_arrdep_page/view_station/view_station.dart';
import 'package:info_tren/pages/train_info_page/view_train/train_info.dart';
import 'package:info_tren/utils/default_ui_design.dart';
import 'package:info_tren/utils/iterable_extensions.dart';
import 'package:shared_preferences/shared_preferences.dart';

final sharedPreferencesProvider = Provider<SharedPreferences>(
  (_) => throw UnimplementedError('Please override in ProviderScope'),
);

class UiDesignNotifier extends StateNotifier<UiDesign> {
  final SharedPreferences sharedPreferences;

  UiDesignNotifier({required this.sharedPreferences,}) : super(UiDesign.MATERIAL) {
    final stored = sharedPreferences.getString('uiDesign');
    final design = UiDesign.values.where((element) => element.name == stored).firstOrNull ?? defaultUiDesign;
    state = design;
  }

  void set(UiDesign? design) async {
    if (design != null) {
      await sharedPreferences.setString('uiDesign', design.name);
    }
    else {
      await sharedPreferences.remove('uiDesign');
    }
    state = design ?? defaultUiDesign;
  }
}
final uiDesignProvider = StateNotifierProvider<UiDesignNotifier, UiDesign>(
  (ref) => UiDesignNotifier(
    sharedPreferences: ref.watch(sharedPreferencesProvider),
  ),
);

final trainInfoArgumentsProvider = Provider<TrainInfoArguments>(
  (_) => throw UnimplementedError('Please override in ProviderScope'),
);

final stationDataProvider = FutureProvider.family((ref, String stationName) async {
  final data = await getStationData(stationName);

  final timer = Timer(const Duration(minutes: 2), () {
    ref.invalidateSelf();
  });
  ref.onDispose(() {
    timer.cancel();
  });

  return data;
});
final viewStationArgumentsProvider = Provider<ViewStationArguments>(
  (_) => throw UnimplementedError('Please override in ProviderScope'),
);
final viewStationDataProvider = Provider((ref) {
  final args = ref.watch(viewStationArgumentsProvider);
  final data = ref.watch(stationDataProvider(args.stationName));
  return data;
}, dependencies: [viewStationArgumentsProvider, stationDataProvider]);