import 'package:flutter_bloc/flutter_bloc.dart';
import 'package:maibu_satabot_v2/features/v2/my/domain/entities/my_entities.dart';
import 'package:maibu_satabot_v2/features/v2/my/domain/usecases/clear_cache_usecase.dart';
import 'package:maibu_satabot_v2/features/v2/my/domain/usecases/get_menu_items_usecase.dart';
import 'package:maibu_satabot_v2/features/v2/my/domain/usecases/toggle_night_mode_usecase.dart';
import 'package:maibu_satabot_v2/features/v2/my/presentation/states/my_state.dart';

/// 我的页面 Cubit
class MyCubit extends Cubit<MyState> {
  MyCubit({
    required GetMenuItemsUseCase getMenuItemsUseCase,
    required ToggleNightModeUseCase toggleNightModeUseCase,
    required ClearCacheUseCase clearCacheUseCase,
  })  : _getMenuItemsUseCase = getMenuItemsUseCase,
        _toggleNightModeUseCase = toggleNightModeUseCase,
        _clearCacheUseCase = clearCacheUseCase,
        super(MyInitial());

  final GetMenuItemsUseCase _getMenuItemsUseCase;
  final ToggleNightModeUseCase _toggleNightModeUseCase;
  final ClearCacheUseCase _clearCacheUseCase;

  /// 加载数据
  Future<void> loadData() async {
    emit(MyLoading());

    try {
      final menuResult = await _getMenuItemsUseCase();

      final menuItems = menuResult.fold(
        (failure) => <MenuItemEntity>[],
        (items) => items,
      );

      if (menuItems.isEmpty) {
        emit(const MyError('加载菜单失败'));
        return;
      }

      // 模拟用户信息（实际应从 Auth 模块获取）
      final userProfile = UserProfileEntity(
        name: '张工程师',
        role: '运维工程师',
        avatar: '',
        userId: 'ENG2024001',
      );

      emit(MyLoaded(
        userProfile: userProfile,
        menuItems: menuItems,
      ));
    } catch (e) {
      emit(MyError('加载数据失败: $e'));
    }
  }

  /// 切换夜间模式
  Future<void> toggleNightMode(bool enabled) async {
    final currentState = state;
    if (currentState is MyLoaded) {
      // 乐观更新 UI
      emit(currentState.copyWith(isNightMode: enabled));

      final result = await _toggleNightModeUseCase(enabled);
      
      result.fold(
        (failure) {
          // 如果失败，回滚状态
          emit(currentState.copyWith(isNightMode: !enabled));
          emit(MyError('切换夜间模式失败'));
        },
        (_) {
          // 成功，保持当前状态
        },
      );
    }
  }

  /// 清除缓存
  Future<void> clearCache() async {
    final currentState = state;
    if (currentState is! MyLoaded) return;

    emit(MyLoading());

    final result = await _clearCacheUseCase();

    result.fold(
      (failure) {
        emit(MyError('清除缓存失败: ${failure.message}'));
      },
      (success) {
        emit(currentState.copyWith(cacheSize: '0 MB'));
      },
    );
  }

  /// 刷新数据
  Future<void> refresh() async {
    await loadData();
  }
}