<template>
    <div class="goods-box" v-infinite-scroll="fetch" infinite-scroll-disable="disableFetch" :infinite-scroll-distance="1200">
        <ul class="cardlist card-large clearfix">
            <li class="card" v-for="(item, index) in data" :key="item.product_skn" @click="clickProduct(item, index)">
                <div class="card-pic">
                    <a v-good-href="item" :class="hrefClass">
                        <img v-img-src="{src: item.default_images, width: 330, height: 440}" :alt="item.product_name">
                    </a>
                </div>
                <div class="card-bd">
                    <h2 class="card-label">
                        <a v-good-href="item" class="line-clamp-1" :class="hrefClass">{{item.product_name}}</a>
                    </h2>
                    <h2 class="card-label-desc" v-if="item.product_name1">
                        <a v-good-href="item" class="line-clamp-1" :class="hrefClass">{{item.product_name}}</a>
                    </h2>
                    <span class="good-price" :class="{'sale-price': item.market_price}">¥{{item.sales_price | toFixed}}</span>
                    <span class="good-price" :class="{'old-price': item.market_price}" v-if="item.market_price">¥{{item.market_price | toFixed}}</span>
                </div>
            </li>
        </ul>
        <p class="cardlist--loading text-center" v-show="state === 1">loading...</p>
        <!--<p class="cardlist--end text-center" v-show="state === 0 ">--End--</p>-->

        <div class="empty-tip" v-show="state === -1">
            <i class="icon icon-search"></i>
            <p class="empty-tip-cn">未找到相关商品</p>
            <p class="empty-tip-en">Did not find the relevant goods</p>
        </div>
    </div>
</template>
<script>
import Vue from 'vue';
import lazyload from 'vue-lazyload';
import infinitScroll from 'vue-infinite-scroll';
import bus from 'common/vue-bus';

Vue.use(lazyload, { preLoad: 3 });
Vue.use(infinitScroll);

export default {
    data() {
        return {
            hrefClass: {}
        };
    },
    props: {
        /* 开启滚动加载 */
        disableFetch: Boolean,

        // 数据
        data: Array,
        state: [Number, Object]   // -1: 无数据 0: 全部加载完  1: 正在加载
    },
    computed: {
        // 空列表: data.length === 0
        whenEmpty() {
            return !this.data.length;
        }
    },
    mounted() {
        const $scrollEl = this.getScrollEventTarget(this.$el);

        $scrollEl.addEventListener('scroll', this.throttle(this.scrollEnd, 200));
    },
    methods: {
        fetch: function() {
            bus.$emit('list.paging');
        },
        clickProduct(item, index) {
            this.$emit('click-product', item, index);
        },
        scrollEnd() {
            this.hrefClass = {};
        },
        getScrollEventTarget(element) {
            let getComputedStyle = document.defaultView.getComputedStyle;
            let currentNode = element;

            while (currentNode && currentNode.tagName !== 'HTML' && currentNode.tagName !== 'BODY' && currentNode.nodeType === 1) {
                let overflowY = getComputedStyle(currentNode).overflowY;

                if (overflowY === 'scroll' || overflowY === 'auto') {
                    return currentNode;
                }
                currentNode = currentNode.parentNode;
            }
            return window;
        },
        throttle(fn, delay) {
            let timer;

            return () => {
                if (timer) {
                    clearTimeout(timer);
                    timer = null;
                }
                this.hrefClass = {
                    'no-link': true
                };

                timer = setTimeout(() => {
                    fn();
                }, delay);
            };
        }
    }
};

</script>
<style>
@import "../../../scss/common/_color.css";

.cardlist {
    list-style: none;
    margin: 0;
    padding: 0;
}

.cardlist--loading {
    font-size: 32px;
    text-align: center;
    padding: 16px 0;
}

.card-large {
    background-color: #fff;

    .card {
        float: left;
        width: 330px;
        margin: 0 30px;

        &:nth-child(2n) {
            margin: 0;
        }
    }

    .card-pic {
        width: 330px;
        height: 440px;

        a,
        img {
            display: block;
            width: 100%;
            height: 100%;
        }
    }

    .card-bd {
        min-height: 180px;
        padding-top: 40px;
        font-size: 0;
        font-family: "BrownStd", "PingFang SC", Helvetica, Roboto, "Heiti SC", "\9ED1\4F53", Arial;
    }

    .card-label {
        margin: 0 0 30px;
        font-size: 24px;
        line-height: 1.4;
        font-weight: normal;
    }

    .card-label-desc {
        margin: 0 0 14px;
        font-size: 20px;
        line-height: 1.4;
        height: 67.1999999999px;
        font-weight: normal;

        a {
            color: #888;
        }
    }
}

.good-price {
    color: #b0b0b0;
    margin-right: 14px;
    font-size: 24px;

    &:last-of-type {
        margin-right: 0;
    }

    &.old-price {
        font-size: 18px;
        color: #b0b0b0;
        text-decoration: line-through;
    }

    &.sale-price {
        color: #000;
    }
}

.empty-tip {
    margin-top: 200px;
    color: #b0b0b0;
    text-align: center;

    .icon-search {
        display: inline-block;
        font-size: 200px;
        margin-bottom: 56px;
    }
}

.empty-tip-cn {
    font-size: 34px;
    margin-bottom: 30px;
}

.empty-tip-en {
    font-size: 20px;
}
</style>