/*
    *    Copyright 2010-2026 the original author or authors.
    *
    *    Licensed under the Apache License, Version 2.0 (the "License");
    *    you may not use this file except in compliance with the License.
    *    You may obtain a copy of the License at
    *
    *       https://www.apache.org/licenses/LICENSE-2.0
    *
   *    Unless required by applicable law or agreed to in writing, software
   *    distributed under the License is distributed on an "AS IS" BASIS,
   *    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   *    See the License for the specific language governing permissions and
   *    limitations under the License.
   */
  package org.mybatis.jpetstore.web.controllers;
  
  import java.util.List;
  
  import org.mybatis.jpetstore.domain.Category;
  import org.mybatis.jpetstore.domain.Item;
  import org.mybatis.jpetstore.domain.Product;
  import org.mybatis.jpetstore.service.CatalogService;
  import org.springframework.beans.factory.annotation.Autowired;
  import org.springframework.stereotype.Controller;
  import org.springframework.ui.Model;
  import org.springframework.web.bind.annotation.GetMapping;
  import org.springframework.web.bind.annotation.RequestMapping;
  import org.springframework.web.bind.annotation.RequestParam;
  
  /**
   * The Class CatalogController.
   */
  @Controller
  @RequestMapping("/catalog")
  public class CatalogController {
  
    /** The error view. */
    private static final String ERROR_VIEW = "common/Error";
  
    /** The catalog service. */
    @Autowired
    private CatalogService catalogService;
  
    /**
     * View main.
     *
     * @return the string
     */
    @GetMapping({ "", "/" })
    public String viewMain() {
      return "catalog/Main";
    }
  
    /**
     * View category.
     *
     * @param categoryId
     *          the category id
     * @param model
     *          the model
     *
     * @return the string
     */
    @GetMapping("/viewCategory")
    public String viewCategory(@RequestParam(value = "categoryId", required = false) String categoryId, Model model) {
      if (categoryId != null) {
        List<Product> productList = catalogService.getProductListByCategory(categoryId);
        Category category = catalogService.getCategory(categoryId);
        model.addAttribute("productList", productList);
        model.addAttribute("category", category);
      }
      return "catalog/Category";
    }
  
    /**
     * View product.
     *
     * @param productId
     *          the product id
     * @param model
     *          the model
     *
     * @return the string
     */
    @GetMapping("/viewProduct")
    public String viewProduct(@RequestParam(value = "productId", required = false) String productId, Model model) {
      if (productId != null) {
        List<Item> itemList = catalogService.getItemListByProduct(productId);
        Product product = catalogService.getProduct(productId);
        model.addAttribute("itemList", itemList);
        model.addAttribute("product", product);
      }
      return "catalog/Product";
    }
  
    /**
     * View item.
     *
    * @param itemId
    *          the item id
    * @param model
    *          the model
    *
    * @return the string
    */
   @GetMapping("/viewItem")
   public String viewItem(@RequestParam("itemId") String itemId, Model model) {
     Item item = catalogService.getItem(itemId);
     Product product = item.getProduct();
     model.addAttribute("item", item);
     model.addAttribute("product", product);
     return "catalog/Item";
   }
 
   /**
    * Search products.
    *
    * @param keyword
    *          the keyword
    * @param model
    *          the model
    *
    * @return the string
    */
   @GetMapping("/searchProducts")
   public String searchProducts(@RequestParam(value = "keyword", required = false) String keyword, Model model) {
     if (keyword == null || keyword.isEmpty()) {
       model.addAttribute("message", "Please enter a keyword to search for, then press the search button.");
       return ERROR_VIEW;
     }
     List<Product> productList = catalogService.searchProductList(keyword.toLowerCase());
     model.addAttribute("productList", productList);
     return "catalog/SearchProducts";
   }
 
 }