import 'dart:async';
import 'dart:io';
import 'package:bloc/bloc.dart';
import 'package:go_router/go_router.dart';
import 'package:hadi_hoda_flutter/core/constants/my_constants.dart';
import 'package:hadi_hoda_flutter/core/routers/my_routes.dart';
import 'package:hadi_hoda_flutter/core/utils/context_provider.dart';
import 'package:hadi_hoda_flutter/core/utils/local_storage.dart';
import 'package:hadi_hoda_flutter/core/utils/storage_path.dart';
import 'package:hadi_hoda_flutter/features/language/domain/entity/language_entity.dart';
import 'package:hadi_hoda_flutter/features/language/presentation/bloc/language_event.dart';
import 'package:hadi_hoda_flutter/features/language/presentation/bloc/language_state.dart';

class LanguageBloc extends Bloc<LanguageEvent, LanguageState> {
  /// ------------constructor------------
  LanguageBloc() : super(const LanguageState()) {
    LocalStorage.saveData(key: MyConstants.firstLanguagePage, value: 'true');
    on<ChangeLanguageEvent>(_changeLanguageEvent);
    on<SaveLevelsEvent>(_saveLevelsEvent);
    on<InitLanguageEvent>(_initLanguageEvent);
  }

  /// ------------UseCases------------

  /// ------------Variables------------
  final List<LanguageEntity> languages = [
    LanguageEntity(title: 'Persian (فارسی)', code: 'fa'),
    LanguageEntity(title: 'English (English)', code: 'en'),
    LanguageEntity(title: 'Arabic (عربی)', code: 'ar'),
  ];

  /// ------------Controllers------------

  /// ------------Functions------------
  FutureOr<void> _changeLanguageEvent(
    ChangeLanguageEvent event,
    Emitter<LanguageState> emit,
  ) {
    emit(state.copyWith(selectedLang: event.lang));
  }

  /// ------------Api Calls------------
  FutureOr<void> _saveLevelsEvent(
    SaveLevelsEvent event,
    Emitter<LanguageState> emit,
  ) async {
    await LocalStorage.saveData(
      key: MyConstants.selectLanguage,
      value: state.selectedLang.code ?? 'fa',
    );
    if (Directory(
        '${StoragePath.documentDir.path}/${state.selectedLang.code}/files')
        .existsSync()) {
      if (ContextProvider.context.mounted) {
        ContextProvider.context.goNamed(Routes.homePage);
      }
    } else {
      await Future.wait([
        LocalStorage.deleteData(key: MyConstants.downloadCompleted),
        LocalStorage.deleteData(key: MyConstants.extractCompleted),
      ]);
      if (ContextProvider.context.mounted) {
        ContextProvider.context.goNamed(Routes.introPage);
      }
    }
  }

  FutureOr<void> _initLanguageEvent(InitLanguageEvent event, Emitter<LanguageState> emit) {
    final String selectedLanguage = LocalStorage.readData(key: MyConstants.selectLanguage).isEmpty
        ? 'fa'
        : LocalStorage.readData(key: MyConstants.selectLanguage);
    emit(state.copyWith(selectedLang: LanguageEntity(code: selectedLanguage)));
  }
}