import 'package:flutter_bloc/flutter_bloc.dart';
import 'package:flutter_project/data/repositories/anime_repository.dart';
import 'package:flutter_project/views/home_page/bloc/events.dart';
import 'package:flutter_project/views/home_page/bloc/state.dart';

class HomeBloc extends Bloc<HomeEvent, HomeState> {
  final AnimeRepository repo;

  HomeBloc(this.repo) : super(const HomeState()) {
    on<HomeLoadDataEvent>(_onLoadData);
    on<HomeShowButtonToTopEvent>(_onShowButton);
  }

  void _onShowButton(HomeShowButtonToTopEvent event, Emitter<HomeState> emit) {
    if (event.isShown != null) {
      if (event.isShown == true) {
        emit(state.copyWith(isButtonToTopShown: true));
      } else {
        emit(state.copyWith(isButtonToTopShown: false));
      }
    }
  }

  Future<void> _onLoadData(
      HomeLoadDataEvent event, Emitter<HomeState> emit) async {
    if (event.hasError != null && event.hasError == true) {
      emit(state.copyWith(error: null));
    }

    if (event.nextPage == null) {
      emit(state.copyWith(isLoading: true));
    } else {
      emit(state.copyWith(isPaginationLoading: true));
    }

    String? error;

    final data = await repo.loadData(
        q: event.search, page: event.nextPage ?? 1, onError: (e) => error = e);

    if (event.nextPage != null) {
      data?.data?.insertAll(0, state.data?.data ?? []);
    }

    emit(state.copyWith(
        data: data,
        isLoading: false,
        isPaginationLoading: false,
        error: error));
  }
}