import { API } from "../../service/api";

// components/addCartModel/addCartModel.js
Component({
    properties: {
      visible: {
        type: Boolean,
        value: false
      },
      product: {
        type: Object,
        value: {}
      }
    },
  
    data: {
      selectedSpecs: [], // 选择的规格索引 [0,1]表示第一个规格的第0个选项，第二个规格的第1个选项
      quantity: 1,
      selectIndex:0, // 属性索引
    },
  
    observers: {
      'product': function(specs) {
        // console.log("888888888888",specs);
        specs && this.getProdDetail(specs);
      }
    },
  
    methods: {
      // 获取商品详情
      getProdDetail(e){
        let data = {
            pageNum:1,
            pageSize:1,
            mercId:e.mercId,
            prodId:e.prodId
        }  
        API.getProdDetail(data).then(res=>{
            this.setData({
                productDetail:res
            })
        })
      },

      // 关闭模态框
      handleClose() {
        this.triggerEvent('close');
      },
      
      // 选择属性
      selectSpec(e) {
        let index = e.currentTarget.dataset.index;
        let availQty = this.data.productDetail.prodAttrList[index].availQty;
        this.setData({ 
            selectIndex:index,
            quantity:availQty > 0?1:0
        });
      },
      
      // 添加数量
      increaseQuantity() {
        const { quantity, productDetail,selectIndex } = this.data;
        if (quantity < productDetail.prodAttrList[selectIndex].availQty) {
          this.setData({ quantity: quantity + 1 });
        }
      },
      
      // 减少数量
      decreaseQuantity() {
        const { quantity } = this.data;
        if (quantity > 1) {
          this.setData({ quantity: quantity - 1 });
        }
      },
      
      handleAddToCart() { 
        let {mercId,prodAttrList,prodId} = this.data.productDetail;  
        const cartItem = {
            prodAttrId: prodAttrList[this.data.selectIndex].prodAttrId,
            mercId,
            prodId,
            count:this.data.quantity
        };
        API.addCarts(cartItem).then(res=>{
            // 可以显示添加成功的提示
            wx.showToast({
                title: '已加入购物车',
                icon: 'success'
            });
            this.triggerEvent('close', { item: cartItem });
        })
      }
    },
    
    computed: {
      
    }
  });