<template>
  <div>
  <LayoutApp :show-back="true">
    <div class="filter">
      <div class="filter-tab">
        <div class="tab-item" :class="selectedType === 2 && 'selected-tab'" @click="pressType(2)">人气</div>
        <div class="tab-item middle" :class="selectedType === 1 && 'selected-tab'" @click="pressType(1)">
          <span>价格</span>
          <div :class="arrowImage"></div>
        </div>
        <div class="tab-item" :class="selectedType === 3 && 'selected-tab'" @click="pressType(3)">新品</div>
      </div>
      <div class="screen middle" @click="goFilter()">
        <div class="screen-img"></div>
        筛选
      </div>
    </div>
    <Scroll :options="scrollOptions"
            :data="productList.list"
            @pulling-up="onPullingUp">
      <ProductList :list="productList.list"></ProductList>
    </Scroll>
  </LayoutApp>
  <Filtrate ref="filtrate"></Filtrate>
  </div>
</template>
<script>
import ProductList from './components/productList';
import Filtrate from './filtrate';

import {Scroll} from 'cube-ui';
import {createNamespacedHelpers} from 'vuex';

const {mapState, mapActions} = createNamespacedHelpers('list');

export default {
  name: 'List',
  components: {
    ProductList,
    Scroll,
    Filtrate
  },
  data() {
    return {
      scrollOptions: {
        bounce: {
          top: false
        },
        pullUpLoad: true
      },
      fixed: false,
      selectedType: 2,
      priceDesc: true,
      arrowImage: '',
      searchKey: '',
      listType: 1
    };
  },
  mounted() {
    this.changeArrow();
    let params = this.$route.params;

    if (Object.keys(params).length && params.listType) {
      this.listType = params.listType;
    }
    this.fetchProductList({listType: this.listType, isReset: true});
    this.fetchFilterData();

  },
  methods: {
    ...mapActions(['fetchProductList', 'fetchFilterData']),

    // 上拉加载
    async onPullingUp() {
      await this.fetchProductList({listType: this.listType});
    },

    // 点击tab type, 0: 推荐, 1: 价格, 2: 人气, 3: 新品
    pressType(type) {
      if (type === this.selectedType && type !== 1) {
        return;
      }
      let params = {
        type: 6,
        query: this.searchKey,
        sort: this.filterParams.sort.join(','),
        brand: this.filterParams.brand.join(','), // 品牌id
        gender: this.filterParams.gender.join(','), // 性别
        size: this.filterParams.size.join(','), // 尺码id
      };

      if (this.listType === 4) {
        delete params.type;
      }

      this.selectedType = type;
      if (type === 1) {
        this.priceDesc = !this.priceDesc;
        params.order = !this.priceDesc ? 'p_desc' : 'p_asc';
      } else if (type === 2) {
        this.priceDesc = true;
        params.order = 'sale_desc';
      } else if (type === 3) {
        this.priceDesc = true;
        params.order = 'st_desc';
      }
      params.listType = this.listType;
      params.isReset = true;
      this.fetchProductList(params);
      this.changeArrow();
    },
    changeArrow() {
      this.arrowImage = (this.selectedType === 3 || this.selectedType === 2) ? 'price-arrow' :
        this.priceDesc ? 'desc-arrow' : 'asc-arrow';
    },
    goFilter() {
      this.$refs.filtrate.show();
    }
  },
  computed: {
    ...mapState(['productList', 'filterParams']),
  },
};
</script>

<style scoped>
  .filter {
    display: flex;
    height: 120px;
    flex-direction: row;
    justify-content: space-between;
    align-items: center;
    padding-left: 42px;
    padding-right: 38px;
  }

  .filter-tab {
    display: flex;
    flex-direction: row;
    align-items: center;
    font-size: 32px;
    color: #999;
    text-align: center;
  }

  .selected-tab {
    font-size: 40px;
    color: #000;
    font-weight: bold;
  }

  .tab-item {
    margin-right: 60px;
  }

  .screen {
    font-size: 32px;
    color: #000;
    letter-spacing: 0;
  }

  .middle {
    display: flex;
    align-items: center;
  }

  .asc-arrow {
    width: 40px;
    height: 40px;
    background: url(~statics/image/list/asc_arrow@3x.png) no-repeat;
    background-size: cover;
  }

  .desc-arrow {
    width: 40px;
    height: 40px;
    background: url(~statics/image/list/desc_arrow@3x.png) no-repeat;
    background-size: cover;
  }

  .price-arrow {
    width: 40px;
    height: 40px;
    background: url(~statics/image/list/price_arrow@3x.png) no-repeat;
    background-size: cover;
  }

  .screen-img {
    width: 40px;
    height: 40px;
    background: url(~statics/image/list/filter@3x.png) no-repeat;
    background-size: cover;
  }
</style>