import { useAppDispatch, useAppSelector } from '@/hooks/redux';
import {
  addCustomFood,
  addToFavorites,
  clearError,
  clearSearchResults,
  fetchFoodLibrary,
  getFoodById,
  removeFoodFromCategory,
  removeFromFavorites,
  searchFoods,
  selectCommonFoods,
  selectFavoritesFoods,
  selectFoodById,
  selectFoodCategories,
  selectFoodCategoryById,
  selectFoodLibrary,
  selectFoodLibraryError,
  selectFoodLibraryLoading,
  selectSearchLoading,
  selectSearchResults,
} from '@/store/foodLibrarySlice';
import type { FoodItem } from '@/types/food';
import { useCallback, useEffect } from 'react';

/**
 * 食物库自定义 Hook
 * 提供食物库相关的状态和操作方法
 */
export const useFoodLibrary = () => {
  const dispatch = useAppDispatch();

  // 选择器
  const foodLibrary = useAppSelector(selectFoodLibrary);
  const categories = useAppSelector(selectFoodCategories);
  const loading = useAppSelector(selectFoodLibraryLoading);
  const error = useAppSelector(selectFoodLibraryError);
  const searchResults = useAppSelector(selectSearchResults);
  const searchLoading = useAppSelector(selectSearchLoading);

  // 操作方法
  const loadFoodLibrary = useCallback(() => {
    dispatch(fetchFoodLibrary());
  }, [dispatch]);

  const searchFoodItems = useCallback((keyword: string) => {
    if (keyword.trim()) {
      dispatch(searchFoods(keyword));
    } else {
      dispatch(clearSearchResults());
    }
  }, [dispatch]);

  const getFoodDetails = useCallback((id: number) => {
    dispatch(getFoodById(id));
  }, [dispatch]);

  const clearErrors = useCallback(() => {
    dispatch(clearError());
  }, [dispatch]);

  const clearSearch = useCallback(() => {
    dispatch(clearSearchResults());
  }, [dispatch]);

  const addFoodToCategory = useCallback((categoryId: string, food: FoodItem) => {
    dispatch(addCustomFood({ categoryId, food }));
  }, [dispatch]);

  const removeFoodFromCat = useCallback((categoryId: string, foodId: string) => {
    dispatch(removeFoodFromCategory({ categoryId, foodId }));
  }, [dispatch]);

  const addFoodToFavorites = useCallback((food: FoodItem) => {
    dispatch(addToFavorites(food));
  }, [dispatch]);

  const removeFoodFromFavorites = useCallback((foodId: string) => {
    dispatch(removeFromFavorites(foodId));
  }, [dispatch]);

  // 自动加载数据
  useEffect(() => {
    if (categories.length === 0 && !loading && !error) {
      loadFoodLibrary();
    }
  }, [categories.length, loading, error, loadFoodLibrary]);

  return {
    // 状态
    foodLibrary,
    categories,
    loading,
    error,
    searchResults,
    searchLoading,

    // 操作方法
    loadFoodLibrary,
    searchFoodItems,
    getFoodDetails,
    clearErrors,
    clearSearch,
    addFoodToCategory,
    removeFoodFromCat,
    addFoodToFavorites,
    removeFoodFromFavorites,
  };
};

/**
 * 获取特定分类的食物
 */
export const useFoodCategory = (categoryId: string) => {
  const category = useAppSelector(selectFoodCategoryById(categoryId));
  return category;
};

/**
 * 获取特定食物详情
 */
export const useFoodItem = (foodId: string) => {
  const food = useAppSelector(selectFoodById(foodId));
  return food;
};

/**
 * 获取收藏的食物
 */
export const useFavoritesFoods = () => {
  const favorites = useAppSelector(selectFavoritesFoods);
  return favorites;
};

/**
 * 获取常见食物
 */
export const useCommonFoods = () => {
  const commonFoods = useAppSelector(selectCommonFoods);
  return commonFoods;
};

/**
 * 食物搜索 Hook
 * 提供搜索相关的状态和方法
 */
export const useFoodSearch = () => {
  const dispatch = useAppDispatch();
  const searchResults = useAppSelector(selectSearchResults);
  const searchLoading = useAppSelector(selectSearchLoading);
  const error = useAppSelector(selectFoodLibraryError);

  const search = useCallback((keyword: string) => {
    if (keyword.trim()) {
      dispatch(searchFoods(keyword));
    } else {
      dispatch(clearSearchResults());
    }
  }, [dispatch]);

  const clearResults = useCallback(() => {
    dispatch(clearSearchResults());
  }, [dispatch]);

  const clearErrors = useCallback(() => {
    dispatch(clearError());
  }, [dispatch]);

  return {
    searchResults,
    searchLoading,
    error,
    search,
    clearResults,
    clearErrors,
  };
};