import 'dart:async';

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/params/no_params.dart';
import 'package:hadi_hoda_flutter/core/routers/my_routes.dart';
import 'package:hadi_hoda_flutter/core/status/base_status.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/features/intro/domain/entities/download_entity.dart';
import 'package:hadi_hoda_flutter/features/intro/domain/usecases/get_files_usecase.dart';
import 'package:hadi_hoda_flutter/features/intro/domain/usecases/loading_stream_usecase.dart';
import 'package:hadi_hoda_flutter/features/intro/domain/usecases/save_levels_usecase.dart';
import 'package:hadi_hoda_flutter/features/intro/presentation/bloc/intro_event.dart';
import 'package:hadi_hoda_flutter/features/intro/presentation/bloc/intro_state.dart';

class IntroBloc extends Bloc<IntroEvent, IntroState> {
  /// ------------constructor------------
  IntroBloc(
      this._getFilesUseCase,
      this._loadingStreamUseCase,
      this._saveLevelsUseCase,
      )
    : super(const IntroState()) {
    on<GetFilesEvent>(_getFilesEvent);
    on<SaveLevelsEvent>(_saveLevelsEvent);
    loadingStream = _loadingStreamUseCase();
  }

  /// ------------UseCases------------
  final GetFilesUseCase _getFilesUseCase;
  final SaveLevelsUseCase _saveLevelsUseCase;
  final LoadingStreamUseCase _loadingStreamUseCase;

  /// ------------Variables------------
  Stream<DownloadEntity> loadingStream = Stream.empty();

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

  /// ------------Functions------------

  /// ------------Api Calls------------
  FutureOr<void> _getFilesEvent(
    GetFilesEvent event,
    Emitter<IntroState> emit,
  ) async {
    emit(state.copyWith(getFilesStatus: BaseInit()));
    await _getFilesUseCase(NoParams()).then((value) {
      value.fold(
        (data) async {
          add(SaveLevelsEvent());
        },
        (error) async {
          emit(state.copyWith(getFilesStatus: BaseError(error.errorMessage)));
        },
      );
    });
  }

  FutureOr<void> _saveLevelsEvent(SaveLevelsEvent event,
      Emitter<IntroState> emit) async {
    await _saveLevelsUseCase(NoParams()).then((value) =>
        value.fold(
          (data) async {
            if(LocalStorage.readData(key: MyConstants.firstLanguagePage) != 'true'){
              ContextProvider.context.goNamed(Routes.languagePage);
            } else {
              await Future.delayed(Duration(milliseconds: 500), () {
                if (ContextProvider.context.mounted) {
                  ContextProvider.context.goNamed(Routes.homePage);
                }
              });
            }
          },
          (error) {
            emit(state.copyWith(getFilesStatus: BaseError(error.errorMessage)));
          },
        ),
    );
  }
}