import 'package:flutter_bloc/flutter_bloc.dart';
import 'package:maibu_satabot_v2/features/v2/home/domain/usecases/get_home_data_usecase.dart';
import 'package:maibu_satabot_v2/features/v2/home/presentation/bloc/home_v2_event.dart';
import 'package:maibu_satabot_v2/features/v2/home/presentation/bloc/home_v2_state.dart';

class HomeV2Bloc extends Bloc<HomeV2Event, HomeV2State> {
  final GetHomeDataUseCase getHomeDataUseCase;

  HomeV2Bloc(this.getHomeDataUseCase) : super(const HomeV2Initial()) {
    on<HomeV2LoadData>(_onLoadData);
    on<HomeV2Refresh>(_onRefresh);
    on<HomeV2ToggleTrendType>(_onToggleTrendType);
  }

  Future<void> _onLoadData(
    HomeV2LoadData event,
    Emitter<HomeV2State> emit,
  ) async {
    emit(const HomeV2Loading());

    final result = await getHomeDataUseCase(const NoParams());

    result.fold(
      (failure) => emit(HomeV2Error(failure.message)),
      (data) => emit(HomeV2Loaded(homeData: data)),
    );
  }

  Future<void> _onRefresh(
    HomeV2Refresh event,
    Emitter<HomeV2State> emit,
  ) async {
    if (state is HomeV2Loaded) {
      final result = await getHomeDataUseCase(const NoParams());

      result.fold(
        (failure) => emit(HomeV2Error(failure.message)),
        (data) => emit(HomeV2Loaded(
          homeData: data,
          trendType: (state as HomeV2Loaded).trendType,
        )),
      );
    }
  }

  void _onToggleTrendType(
    HomeV2ToggleTrendType event,
    Emitter<HomeV2State> emit,
  ) {
    if (state is HomeV2Loaded) {
      final currentState = state as HomeV2Loaded;
      emit(currentState.copyWith(trendType: event.type));
      print('切换趋势类型：${event.type}');
    }
  }
}