import 'package:flutter_bloc/flutter_bloc.dart';
import 'package:test_app/data/repository/potter_repository.dart';
import 'package:test_app/domain/home.dart';
import 'package:test_app/view/home_page/bloc/events.dart';
import 'package:test_app/view/home_page/bloc/state.dart';

class HomeBloc extends Bloc<HomeEvent, HomeState> {
  final PotterRepository repository;

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

  void _onLoadData(HomeLoadDataEvent event, Emitter<HomeState> emit) async {
    final nextPage = event.nextPage ?? 1;

    emit(state.copyWith(
      isLoading: true,
      data: nextPage == 1 ? HomeData() : null,
    ));

    String? error;

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

    final isNextPage = data?.nextPage != null;

    if (nextPage > 1) {
      data?.data?.insertAll(0, state.data?.data ?? []);
    }

    emit(state.copyWith(
        isLoading: false, data: isNextPage ? data : null, error: error));
  }
}