import 'package:flutter_bloc/flutter_bloc.dart';
import 'package:pmu/data/repositories/cats_repository.dart';
import 'package:pmu/presentation/home_page/bloc/events.dart';
import 'package:pmu/presentation/home_page/bloc/state.dart';

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

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

  Future<void> _onLoadData(HomeLoadDataEvent event, Emitter<HomeState> emit) async {
    if (event.offset == 0) {
      emit(state.copyWith(isLoading: true));
    } else {
      emit(state.copyWith(isPaginationLoading: true));
    }

    String? error;

    final data = await repo.loadData(
      q: event.search,
      onError: (e) => error = e,
      offset: event.offset,
    );

    if (data != null) {
      final updatedData = (event.offset == 0
          ? data.data
          : [...state.data?.data ?? [], ...data.data ?? []]);

      emit(state.copyWith(
        isLoading: false,
        isPaginationLoading: false,
        data: HomeData(data: updatedData),
        error: error,
      ));
    } else {
      emit(state.copyWith(
        isLoading: false,
        isPaginationLoading: false,
        error: error,
      ));
    }
  }
}