import 'package:flutter_test/flutter_test.dart';
import 'package:bookshelf_flutter/features/settings/bloc/settings_bloc.dart';
import 'package:bookshelf_flutter/features/settings/bloc/settings_event.dart';
import 'package:bookshelf_flutter/features/settings/bloc/settings_state.dart';

void main() {
  group('SettingsBloc', () {
    late SettingsBloc settingsBloc;

    setUp(() {
      settingsBloc = SettingsBloc();
    });

    tearDown(() {
      settingsBloc.close();
    });

    test('initial state is SettingsState.initial()', () {
      expect(settingsBloc.state, isA<SettingsState>());
      expect(settingsBloc.state.isLoading, true);
    });

    group('LoadSettings', () {
      test('loads default settings into state', () async {
        settingsBloc.add(const LoadSettings());
        await Future.delayed(Duration.zero);

        expect(settingsBloc.state.isDarkMode, false);
        expect(settingsBloc.state.language, 'English');
        expect(settingsBloc.state.notificationsEnabled, true);
        expect(settingsBloc.state.isLoading, false);
      });
    });

    group('UpdateTheme', () {
      test('updates isDarkMode to true', () async {
        settingsBloc.add(const UpdateTheme(true));
        await Future.delayed(Duration.zero);

        expect(settingsBloc.state.isDarkMode, true);
      });

      test('updates isDarkMode to false', () async {
        settingsBloc.add(const UpdateTheme(true));
        await Future.delayed(Duration.zero);

        settingsBloc.add(const UpdateTheme(false));
        await Future.delayed(Duration.zero);

        expect(settingsBloc.state.isDarkMode, false);
      });
    });

    group('UpdateLanguage', () {
      test('updates language setting', () async {
        settingsBloc.add(const UpdateLanguage('Russian'));
        await Future.delayed(Duration.zero);

        expect(settingsBloc.state.language, 'Russian');
      });

      test('updates language to English', () async {
        settingsBloc.add(const UpdateLanguage('English'));
        await Future.delayed(Duration.zero);

        expect(settingsBloc.state.language, 'English');
      });
    });

    group('ToggleNotifications', () {
      test('toggles notifications from true to false', () async {
        settingsBloc.add(const LoadSettings());
        await Future.delayed(Duration.zero);
        expect(settingsBloc.state.notificationsEnabled, true);

        settingsBloc.add(const ToggleNotifications());
        await Future.delayed(Duration.zero);

        expect(settingsBloc.state.notificationsEnabled, false);
      });

      test('toggles notifications from false to true', () async {
        settingsBloc.add(const UpdateTheme(false));
        await Future.delayed(Duration.zero);
        settingsBloc.add(const ToggleNotifications());
        await Future.delayed(Duration.zero);
        expect(settingsBloc.state.notificationsEnabled, false);

        settingsBloc.add(const ToggleNotifications());
        await Future.delayed(Duration.zero);

        expect(settingsBloc.state.notificationsEnabled, true);
      });
    });

    group('ClearData', () {
      test('sets dataCleared to true', () async {
        settingsBloc.add(const ClearData());
        await Future.delayed(Duration.zero);

        expect(settingsBloc.state.dataCleared, true);
      });
    });
  });
}