import 'dart:async';

import 'package:external_repos/external_repos.dart';
import 'package:fast_immutable_collections/fast_immutable_collections.dart';
import 'package:riverpod_annotation/riverpod_annotation.dart';
import 'package:uae_stat/config/injector.dart';
import 'package:uae_stat/domain/entities/preferences_entity.dart';
import 'package:uae_stat/domain/repos/t_local_preferences_repo.dart';

part 'preferences_use_case.g.dart';

@riverpod
class PreferencesUseCase extends _$PreferencesUseCase {
  static final _localRepo = getIt.call<TLocalPreferencesRepo>();
  static final defaultPrefs = PreferencesEntity(
    language: LanguageLocale.arAE,
    favoriteIndicators: <IndicatorEnum>[].toIList(),
    favoriteCountries: <ISOCountry>[].toIList(),
    favoriteReports: <String>[].toIList(),
    doNotifyOnIndicatorUpdates: false,
    doNotifyOnCompetitivenessReportsUpdates: false,
    doNotifyOnCountryUpdates: false,
  );

  @override
  Future<PreferencesEntity> build() async {
    final localPrefs = await _localRepo.get();
    return localPrefs ?? defaultPrefs;
  }

  Future<void> updatePreferences(
    PreferencesEntity Function(PreferencesEntity prefs) update,
  ) async {
    final updated = update(await future);
    await _localRepo.update(updated);
    state = AsyncData(updated);
  }
}