feature-next-arch/lib/features/v2/home/presentation/bloc/home_v2_bloc.dart

import 'package:flutter_bloc/flutter_bloc.dart';
import 'package:maibu_satabot_v2/core/app/app_user_cubit.dart';
import 'package:maibu_satabot_v2/features/v2/site/presentation/cubit/site_cubit.dart';
import 'package:maibu_satabot_v2/features/v2/home/domain/entities/site_entity.dart';
import 'package:maibu_satabot_v2/features/v2/home/domain/usecases/get_home_data_usecase.dart';
import 'package:maibu_satabot_v2/features/v2/home/domain/usecases/get_site_list_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';
import '../../../../../core/network/error_handler.dart';

class HomeV2Bloc extends Bloc<HomeV2Event, HomeV2State> {
  final GetHomeDataUseCase getHomeDataUseCase;
  final GetSiteListUseCase getSiteListUseCase;
  final AppUserCubit appUserCubit;
  final SiteCubit siteCubit;

  HomeV2Bloc(
    this.getHomeDataUseCase,
    this.getSiteListUseCase,
    this.appUserCubit,
    this.siteCubit,
  ) : 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 user = appUserCubit.state.user;
    if (user == null) {
      emit(const HomeV2Error(message: '用户未登录', shouldShowError: true));
      return;
    }

    // 并行加载首页数据和场站列表
    final homeResult = await getHomeDataUseCase(const NoParams());
    final siteResult = await getSiteListUseCase(user.userId); // 使用用户的 userId

    homeResult.fold(
      (failure) => emit(
        HomeV2Error(
          message: ErrorHandler.getErrorMessage(failure.message),
          shouldShowError: true, // 🔥 标记需要显示弹窗
        ),
      ),
      (homeData) {
        List<SiteEntity> sites = [];
        SiteEntity? selectedSite;

        siteResult.fold(
          (failure) {
            print('加载场站列表失败: ${failure.message}');
          },
          (siteList) {
            sites = siteList;
            // 从全局 SiteCubit 获取之前选中的场站
            final savedSelectedSite = siteCubit.state.selectedSite;

            // 尝试找到之前选中的场站
            if (savedSelectedSite != null && siteList.isNotEmpty) {
              selectedSite = siteList.firstWhere(
                (site) => site.id == savedSelectedSite.id,
                orElse: () => siteList.first,
              );
            } else {
              // 没有选中过，默认选中第一个
              selectedSite = siteList.isNotEmpty ? siteList.first : null;
            }

            // 更新全局 SiteCubit 的选中状态
            if (selectedSite != null) {
              siteCubit.selectSite(selectedSite!);
            }
          },
        );

        emit(
          HomeV2Loaded(
            homeData: homeData,
            sites: sites,
            selectedSite: selectedSite,
          ),
        );
      },
    );
  }

  Future<void> _onRefresh(
    HomeV2Refresh event,
    Emitter<HomeV2State> emit,
  ) async {
    if (state is HomeV2Loaded) {
      final currentState = state as HomeV2Loaded;

      final user = appUserCubit.state.user;
      if (user == null) {
        emit(const HomeV2Error(message: '用户未登录', shouldShowError: true));
        return;
      }

      // 并行刷新首页数据和电站列表
      final homeResult = await getHomeDataUseCase(const NoParams());
      final siteResult = await getSiteListUseCase(user.userId);

      homeResult.fold(
        (failure) => emit(
          HomeV2Error(
            message: ErrorHandler.getErrorMessage(failure.message),
            shouldShowError: true, // 🔥 标记需要显示弹窗
          ),
        ),
        (homeData) {
          List<SiteEntity> sites = currentState.sites;
          SiteEntity? selectedSite = currentState.selectedSite;

          siteResult.fold(
            (failure) {
              print('刷新场站列表失败: ${failure.message}');
            },
            (siteList) {
              sites = siteList;
              // 保持当前选中的场站
              final savedSelectedSite = siteCubit.state.selectedSite;
              if (savedSelectedSite != null && siteList.isNotEmpty) {
                selectedSite = siteList.firstWhere(
                  (site) => site.id == savedSelectedSite.id,
                  orElse: () => siteList.first,
                );
              } else if (siteList.isNotEmpty) {
                selectedSite = siteList.first;
              }

              // 更新全局 SiteCubit 的选中状态
              if (selectedSite != null) {
                siteCubit.selectSite(selectedSite!);
              }
            },
          );

          emit(
            HomeV2Loaded(
              homeData: homeData,
              trendType: currentState.trendType,
              sites: sites,
              selectedSite: selectedSite,
            ),
          );
        },
      );
    }
  }

  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}');
    }
  }
}