<template>
	<div class="ns-groupbuy">
		<div class="ns-groupbuy-head">
			<el-carousel height="420px" v-loading="loadingAd" v-if="adList.length">
				<el-carousel-item v-for="item in adList" :key="item.adv_id"><el-image :src="$img(item.adv_image)" fit="cover" @click="$util.pushToTab(item.adv_url.url)" /></el-carousel-item>
			</el-carousel>
		</div>

		<!-- 商品列表 -->
		<div class="ns-groupbuy-box" v-loading="loading">
			<div class="ns-groupbuy-title" v-if="goodsList.length">
				<span class="groupbuy-title-left">团购专区</span>
			</div>

			<div class="goods-list" v-if="goodsList.length">
        <div class="goods" v-for="item in goodsList" :key="item.id" @click="$router.push('/promotion/groupbuy/' + item.groupbuy_id)">
          <!-- 商品图片区 -->
          <div class="img"><el-image fit="scale-down" :src="$img(item.goods_image, { size: 'mid' })" lazy @error="imageError(index)"></el-image></div>

          <!-- 商品名称 -->
          <div class="name">
            <p :title="item.goods_name">{{ item.goods_name }}</p>
          </div>

          <!-- 价格展示区 -->
          <div class="price">
            <div class="curr-price">
              <span>团购价</span>
              <span>￥</span>
              <span class="main_price">{{ item.groupbuy_price }}</span>
            </div>
            <span class="primary_price">￥{{ item.price }}</span>
          </div>
          <el-button>立即拼购</el-button>
        </div>
			</div>
			<div v-else-if="!loading" class="empty-wrap">
        <img src="~assets/images/goods_empty.png" >
        <span>暂无正在进行团购的商品，<router-link to="/" class="ns-text-color">去首页</router-link>看看吧</span>
      </div>

			<div class="pager">
				<el-pagination
					background
					:pager-count="5"
					:total="total"
					prev-text="上一页"
					next-text="下一页"
					:current-page.sync="currentPage"
					:page-size.sync="pageSize"
					@size-change="handlePageSizeChange"
					@current-change="handleCurrentPageChange"
					hide-on-single-page
				></el-pagination>
			</div>
		</div>
	</div>
</template>

<script>
import { goodsPage } from '@/api/groupbuy';
import { mapGetters } from 'vuex';
import { adList } from '@/api/website';

export default {
	name: 'groupbuy',
	components: {},
	data: () => {
		return {
			loading: true,
			goodsList: [],
			total: 0,
			currentPage: 1,
			pageSize: 25,
			loadingAd: true,
			adList: []
		};
	},
	created() {
		if (this.addonIsExit && this.addonIsExit.groupbuy != 1) {
			this.$message({
				message: '团购插件未安装',
				type: 'warning',
				duration: 2000,
				onClose: () => {
					this.$route.push('/');
				}
			});
		} else {
			this.getAdList();
			this.getGoodsList();
		}
	},
	computed: {
		...mapGetters(['defaultGoodsImage', 'addonIsExit'])
	},
  head() {
    return {
      title: '团购专区-' + this.$store.state.site.siteInfo.site_name,
      meta: [{
          name: 'description',
          content: this.$store.state.site.siteInfo.seo_description
        },
        {
          name: 'keyword',
          content: this.$store.state.site.siteInfo.seo_keywords
        }
      ]
    }
  },
	watch: {
		addonIsExit() {
			if (this.addonIsExit.groupbuy != 1) {
				this.$message({
					message: '团购插件未安装',
					type: 'warning',
					duration: 2000,
					onClose: () => {
						this.$route.push('/');
					}
				});
			}
		}
	},
	methods: {
		getAdList() {
			adList({ keyword: 'NS_PC_GROUPBUY' })
				.then(res => {
					this.adList = res.data.adv_list;
					for (let i = 0; i < this.adList.length; i++) {
						if (this.adList[i].adv_url) this.adList[i].adv_url = JSON.parse(this.adList[i].adv_url);
					}
					this.loadingAd = false;
				})
				.catch(err => {
					this.loadingAd = false;
				});
		},
		/**
		 * 团购商品
		 */
		getGoodsList() {
			goodsPage({
				page_size: this.pageSize,
				page: this.currentPage
			})
				.then(res => {
					this.goodsList = res.data.list;
					this.total = res.data.count;
					this.loading = false;
				})
				.catch(err => {
					this.loading = false;
					this.$message.error(err.message);
				});
		},
		handlePageSizeChange(size) {
			this.pageSize = size;
			this.refresh();
		},
		handleCurrentPageChange(page) {
			this.currentPage = page;
			this.refresh();
		},
		refresh() {
			this.loading = true;
			this.getGoodsList();
		},
		/**
		 * 图片加载失败
		 */
		imageError(index) {
			this.goodsList[index].goods_image = this.defaultGoodsImage;
		}
	}
};
</script>
<style lang="scss" scoped>
.ns-groupbuy {
	.ns-groupbuy-box {
		padding: 48px 0;
		width: $width;
		margin: 0 auto;

		.ns-groupbuy-title {
      display: flex;
      align-items: center;
      border-bottom: 1px solid #e8e8e8;
      .groupbuy-title-left{
        font-size: 30px;
        color: #333;
        border-bottom: 4px solid #F42424;
      }
		}
	}
	.goods-list {
		display: flex;
		flex-direction: row;
		flex-wrap: wrap;
		justify-content: flex-start;
		margin-top: 32px;

		.goods {
      margin-right: 17px;
      margin-bottom: 18px;
			width: 228px;
			background-color: #ffffff;
			overflow: hidden;
			color: #303133;
			transition: 0.3s;
			padding: 18px;
			box-sizing: border-box;
			cursor: pointer;
      &:nth-child(5n+5){
        margin-right: 0;
      }
		}

		.img {
			width: 192px;
			height: 192px;
      .el-image{
        max-width: 100%;
        max-height: 100%;
      }
		}

		.price {
      display: flex;
      align-items: baseline;
			.curr-price {
				display: flex;
				align-items: baseline;
				height: 24px;
        font-weight: bold;
				color: $base-color;

				span:first-child {
					font-size: 14px;
					margin-right: 1px;
				}
				span:nth-child(2) {
          font-size: 12px;
				}
			}

			.main_price {
				color: $base-color;
				font-size: 14px;
				line-height: 24px;
			}

			.primary_price {
				text-decoration: line-through;
				color: $base-color-info;
				margin-left: 5px;
        font-size: 12px;
			}
		}
    .el-button {
      width: 100%;
      height: 42px;
      line-height: 42px;
      background: $base-color;
      color: #ffffff;
      margin-top: 10px;
      border: none;
      border-radius: 0;
      padding: 0;
      font-size: 16px;
    }

		.name {
      margin-top: 12px;
			font-size: 14px;
			line-height: 1.4;
			margin-bottom: 5px;
			white-space: normal;
			overflow: hidden;

			p {
				line-height: 24px;
				display: -webkit-box;
				-webkit-box-orient: vertical;
				-webkit-line-clamp: 2;
				overflow: hidden;
				height: 50px;
			}
		}
	}
  .empty-wrap{
    padding: 50px 0 60px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    box-sizing: border-box;
    img{
      width: 400px;
      height: 244px;
    }
    span{
      font-size: 14px;
      color: #4A4A4A;
    }
  }
}
</style>
<style lang="scss">
.ns-groupbuy {
	.ns-groupbuy-head{
		width: $width;
		margin: auto;
	}
	.el-carousel {
    .el-image{
      height: 100%;
    }
		.el-image__inner {
			width: auto;
		}
	}
	.el-carousel__arrow--right{
		right: 60px;
	}
}
</style>
