<template>
  <div class="seckill-list">
    <BaseHeader></BaseHeader>
    <Search />
    <!-- 秒杀时间段 -->
    <div class="promotion-decorate">限时秒杀</div>
    <ul class="time-line">
      <template v-for="(time, index) in list">
        <li
          v-if="index < 5"
          @click="currIndex = index"
          :key="index"
          :class="{ currTimeline: currIndex === index }"
        >
          <div>{{ time.timeLine + ":00" }}</div>
          <div v-if="currIndex === index">
            <p>{{ nowHour >= time.timeLine ? "秒杀中" : "即将开始" }}</p>
            <p>
              {{ nowHour >= time.timeLine ? "距结束" : "距开始" }}&nbsp;{{
                currTime
              }}
            </p>
          </div>
          <div v-else class="not-curr">
            {{ nowHour >= time.timeLine ? "秒杀中" : "即将开始" }}
          </div>
        </li>
      </template>
    </ul>
    <!-- 秒杀商品列表 -->
    <div class="goods-list">
      <empty v-if="goodsList.length === 0" />
      <div
        v-else
        class="goods-show-info1"
        v-for="(item, index) in goodsList"
        :key="index"
        @click="goGoodsDetail(item.skuId, item.goodsId)"
      >
        <div class="goods-show-img">
          <img width="200" height="200" :src="item.goodsImage" />
        </div>
        <div class="goods-show-price">
          <span>
            <span class="seckill-price text-danger">{{
              item.price | unitPrice("￥")
            }}</span>
            <span style="color: #999; text-decoration: line-through">{{
              item.originalPrice | unitPrice("￥")
            }}</span>
          </span>
        </div>
        <div class="goods-show-detail">
          <span>{{ item.goodsName }}</span>
        </div>
        <div
          class="goods-seckill-btn"
          :class="{
            'goods-seckill-btn-gray': nowHour < list[currIndex].timeLine,
          }"
        >
          {{ nowHour >= list[currIndex].timeLine ? "立即抢购" : "即将开始" }}
        </div>
        <div
          v-if="nowHour >= list[currIndex].timeLine && item.quantity <=  item.salesNum"
          class="goods-seckill-btn goods-seckill-btn-gray"
        >
          已售罄
        </div>
        <div v-if="nowHour >= list[currIndex].timeLine" class="goods-show-num1">
          <span
            >已售{{
              (item.quantity && item.quantity > 0
                ? Math.ceil(
                    (item.salesNum / (item.quantity + item.salesNum)) * 100
                  )
                : 100) + "%"
            }}</span
          ><Progress
            hide-info
            stroke-color="#df0021"
            style="width: 110px"
            class="ml_10"
            :percent="
              item.quantity && item.quantity > 0
                ? Math.ceil(
                    (item.salesNum / (item.quantity + item.salesNum)) * 100
                  )
                : 100
            "
          />
        </div>
        <div class="goods-show-seller">
          <span>{{ item.storeName }}</span>
        </div>
      </div>
    </div>
    <BaseFooter />
  </div>
</template>
<script>
import { seckillByDay } from "@/api/promotion";
export default {
  data() {
    return {
      list: [], // 秒杀时段列表
      goodsList: [], // 商品列表
      interval: null, // 定时器
      currIndex: 0, // 当前时间段的下标
      currTime: 0, // 当前显示的倒计时
      diffSeconds: 0, // 倒计时时间戳
      nowHour: new Date().getHours(), // 当前小时数
    };
  },
  beforeDestroy() {
    // 销毁前清除定时器
    clearInterval(this.interval);
  },
  watch: {
    currIndex(val) {
      clearInterval(this.interval);
      this.interval = null;
      this.nowHour = new Date().getHours();
      this.countDown(val);
      this.goodsList = this.list[val].seckillGoodsList;
    },
    diffSeconds(val) {
      const hours = Math.floor(val / 3600);
      // 当前秒数 / 60，向下取整
      // 获取到所有分钟数 3600 / 60 = 60分钟
      // 对60取模，超过小时数的分钟数
      const minutes = Math.floor(val / 60) % 60;
      // 当前的秒数 % 60，获取到 超过小时数、分钟数的秒数（秒数）
      const seconds = val % 60;
      this.currTime =
        filteTime(hours) + ":" + filteTime(minutes) + ":" + filteTime(seconds);
      if (val <= 0) {
        clearInterval(this.interval);
        this.interval = null;
      }
      function filteTime(time) {
        if (time < 10) {
          return "0" + time;
        } else {
          return time;
        }
      }
    },
  },
  methods: {
    getListByDay() {
      // 当天秒杀活动
      seckillByDay().then((res) => {
        if (res.success) {
          this.list = res.result;
          this.goodsList = this.list[0].seckillGoodsList;
          this.countDown(this.currIndex);
        }
      });
    },
    goGoodsDetail(skuId, goodsId) {
      // 跳转商品详情
      let routeUrl = this.$router.resolve({
        path: "/goodsDetail",
        query: { skuId, goodsId },
      });
      window.open(routeUrl.href, "_blank");
    },
    countDown(currIndex) {
      // 倒计时
      // 0点时间戳
      let zeroTime = new Date(new Date().toLocaleDateString()).getTime();
      let currTime = new Date().getTime();
      let actTime = 0;
      let nowHour = new Date().getHours(); // 当前小时数
      if (this.list[currIndex].timeLine > nowHour) {
        // 活动未开始
        actTime = zeroTime + this.list[currIndex].timeLine * 3600 * 1000;
      } else if (this.list[currIndex].timeLine <= nowHour) {
        // 活动进行中
        if (currIndex === this.list.length - 1) {
          // 如果是最后一个活动，直到24点结束
          actTime = zeroTime + 24 * 3600 * 1000;
        } else {
          actTime = zeroTime + this.list[currIndex + 1].timeLine * 3600 * 1000;
        }
      }
      this.diffSeconds = Math.floor((actTime - currTime) / 1000);
      this.interval = setInterval(() => {
        this.diffSeconds--;
      }, 1000);
    },
  },
  mounted() {
    this.getListByDay();
  },
};
</script>
<style lang="scss" scoped>
@import "../../assets/styles/goodsList.scss";
.goods-seckill-btn {
  position: absolute;
  right: 0;
  bottom: 0;
  width: 80px;
  color: #fff;
  height: 35px;
  text-align: center;
  line-height: 35px;
  font-size: 14px;
  background-color: $theme_color;
  margin-bottom: 1px;
  margin-right: 1px;
}
.goods-seckill-btn-gray {
  background-color: #666;
}
.promotion-decorate::before,
.promotion-decorate::after {
  background-image: url("/src/assets/images/sprite@2x.png");
}
.time-line {
  width: 1200px;
  height: 60px;
  margin: 0 auto;
  background-color: #fff;
  display: flex;
  li {
    padding: 0 30px;
    font-size: 16px;
    font-weight: bold;
    width: 240px;
    height: 100%;
    display: flex;
    align-items: center;
    &:hover {
      cursor: pointer;
    }
    .not-curr {
      border: 1px solid #999;
      border-radius: 20px;
      padding: 3px 10px;
      margin-left: 10px;
      font-size: 12px;
      font-weight: normal;
    }
  }
  .currTimeline {
    background-color: $theme_color;
    color: #fff;
    > div:nth-child(1) {
      font-size: 20px;
    }
    > div:nth-child(2) {
      font-size: 14px;
      margin-left: 10px;
    }
  }
}
.goods-show-info1 {
  width: 290px;
  padding: 6px;
  margin: 10px 0px;
  margin-left: 8px;
  position: relative;
  border: 1px solid #fff;
  cursor: pointer;
  background-color: #fff;
}
.goods-show-info1:hover {
  border: 1px solid #ccc;
  box-shadow: 0px 0px 15px #ccc;
}
.goods-show-img {
  display: flex;
  justify-content: center;
}
.ivu-progress-success .ivu-progress-bg {
    background-color: #111fff;
}
</style>
