// components/product-list/product-list.js

// 获取应用实例
const {API} = require('../../service/api.js');


Component({
    properties: {
        // header嵌入的位置，index:首页
        position:{
            type:String,
            value:''
        },
        filterObj:{
            type:Object,
            value:{}
        }
    },
    observers:{
        "filterObj": function(newVal){
           this.getClassifyCommodity();
        }
    },
    data: {
        goodsList: [],
        pageNum:1,
    },
    methods: {
        // 获取今日热门商品列表
        getHotCommodity(){
            API.getLeftProds().then(res=>{
                if(res){
                    this.setData({
                        goodsList:res.prodList
                    })
                };
            })
        },
        // 获取上新商品列表
        getNewCommodity(){
            API.getMiddleProds().then(res=>{
                if(res){
                    this.setData({
                        goodsList:res.prodList
                    })
                };
            })
        },
        // 获取预售商品列表
        getPresaleCommodity(){
            API.getRightProds().then(res=>{
                if(res){
                    this.setData({
                        goodsList:res.prodList
                    })
                }
            })
        },
        // 获取分类商品
        getClassifyCommodity(){
            let data = {
                ...this.data.filterObj,
                pageNum:this.data.pageNum,
                pageSize:5
            }
            API.getProdsList(data).then(res=>{
                if(res){
                    this.setData({
                        goodsList:this.data.pageNum === 1?res.mercProdList:[...this.data.goodsList,...res.mercProdList]
                    })
                }
            })
        },
        // 添加购物车
        addCart(prod){
            console.log(prod);
            let prodInfo = prod.currentTarget.dataset.prod;
            prodInfo.buy = true;
            this.triggerEvent('addCart',prodInfo);
        },
        // 观察滚动触底事件
        onReachBottom(e){
            this.setData({
                pageNum:this.data.pageNum+1
            });
            this.observerFunction();
        },
        observerFunction(){
            if(this.data.position === 'hot') this.getHotCommodity();
            if(this.data.position === 'new') this.getNewCommodity();
            if(this.data.position === 'presale') this.getPresaleCommodity();
            if(this.data.position === 'sort' || this.data.position === 'index') this.getClassifyCommodity();
        },
    },
    ready: function(){
        this.observerFunction();
    }
})