import 'dart:async';
import 'dart:developer';

import 'package:hooks_riverpod/hooks_riverpod.dart';
import 'package:info_tren/api/station_data.dart';
import 'package:info_tren/api/train_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:riverpod_annotation/riverpod_annotation.dart';
import 'package:shared_preferences/shared_preferences.dart';

part 'providers.g.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),
  ),
  dependencies: [sharedPreferencesProvider],
);

class UiTimeZoneNotifier extends StateNotifier<UiTimeZone> {
  final SharedPreferences sharedPreferences;

  UiTimeZoneNotifier({required this.sharedPreferences,}) : super(const RoUiTimeZone()) {
    final stored = sharedPreferences.getString('uiTimeZone');
    if (stored != null) {
      try {
        state = UiTimeZone.fromSerString(stored);
      }
      catch (e) {
        log('Invalid UiTimeZone ser: $stored, error: $e', level: 1000);
      }
    }
  }

  void set(UiTimeZone? timeZone) async {
    if (timeZone != null) {
      await sharedPreferences.setString('uiTimeZone', timeZone.toSerString());
    }
    else {
      await sharedPreferences.remove('uiTimeZone');
    }
    state = timeZone ?? const LocalUiTimeZone();
  }
}
final uiTimeZoneProvider = StateNotifierProvider<UiTimeZoneNotifier, UiTimeZone>(
  (ref) => UiTimeZoneNotifier(
    sharedPreferences: ref.watch(sharedPreferencesProvider),
  ),
  dependencies: [sharedPreferencesProvider],
);

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

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

  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));
  return data;
}, dependencies: [viewStationArgumentsProvider, stationDataProvider]);

@Riverpod(keepAlive: true)
Future<TrainData> trainInfo(TrainInfoRef ref, {required String trainNumber, DateTime? date}) => getTrain(trainNumber, date: date);