import 'dart:async';

import 'package:bloc/bloc.dart';
import 'package:hadi_hoda_flutter/core/params/no_params.dart';
import 'package:hadi_hoda_flutter/core/status/base_status.dart';
import 'package:hadi_hoda_flutter/features/language/domain/usecases/get_languages_usecase.dart';
import 'package:hadi_hoda_flutter/features/language/domain/usecases/get_selected_language_usecase.dart';
import 'package:hadi_hoda_flutter/features/language/domain/usecases/save_selected_language_usecase.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> {
  final GetLanguagesUseCase _getLanguagesUseCase;
  final GetSelectedLanguageUseCase _getSelectedLanguageUseCase;
  final SaveSelectedLanguageUseCase _saveSelectedLanguageUseCase;

  LanguageBloc(
    this._getLanguagesUseCase,
    this._getSelectedLanguageUseCase,
    this._saveSelectedLanguageUseCase,
  ) : super(const LanguageState()) {
    on<GetLanguagesEvent>(_onGetLanguagesEvent);
    on<SelectLanguageEvent>(_onSelectLanguageEvent);
  }

  FutureOr<void> _onGetLanguagesEvent(
    GetLanguagesEvent event,
    Emitter<LanguageState> emit,
  ) async {
    emit(state.copyWith(getLanguagesStatus: const BaseLoading()));

    final result = await _getLanguagesUseCase(NoParams());

    if (result.isSuccess) {
      final languages = result.data!;
      final selectedResult = await _getSelectedLanguageUseCase(languages);
      
      emit(
        state.copyWith(
          getLanguagesStatus: const BaseComplete(''),
          languages: languages,
          selectedLanguage: selectedResult.data,
        ),
      );
    } else {
      emit(
        state.copyWith(
          getLanguagesStatus: BaseError(result.error!.errorMessage),
        ),
      );
    }
  }

  FutureOr<void> _onSelectLanguageEvent(
    SelectLanguageEvent event,
    Emitter<LanguageState> emit,
  ) async {
    await _saveSelectedLanguageUseCase(event.language.code);
    emit(state.copyWith(selectedLanguage: event.language));
  }
}