<template>
  <view class="container">
    <!-- 头部搜索区 -->
    <view class="search-bar">
      <view
        class="search-box"
        @tap="toSearchPage"
      >
        <image
          src="/static/images/icon/search.png"
          class="search-img"
        />
        <text class="sear-input">
          搜索您想要的商品
        </text>
      </view>
    </view>
    <!-- 滚动内容区 -->
    <view class="main">
      <!-- 左侧菜单start -->
      <scroll-view
        scroll-y="true"
        class="leftmenu"
      >
        <block
          v-for="(item, index) in categoryList"
          :key="index"
        >
          <view
            :class="'menu-item ' + (selIndex==index?'active':'') + ' '"
            :data-index="index"
            :data-id="item.categoryId"
            @tap="onMenuTab"
          >
            {{ item.categoryName }}
          </view>
        </block>
        <view
          v-if="!categoryList || !categoryList.length"
          class="ca-empty"
        >
          {{ categoryList && categoryList.length ? '该分类下暂无商品' : '暂无商品' }}
        </view>
      </scroll-view>
      <!-- 左侧菜单end -->

      <!-- 右侧内容start -->
      <scroll-view
        scroll-y="true"
        class="rightcontent"
      >
        <view class="adver-map">
          <view class="item-a">
            <image
              :src="categoryImg"
              mode="widthFix"
            />
          </view>
        </view>
        <!-- 子分类 -->
        <view
          v-if="subCategoryList.length"
          class="th-cate-con"
        >
          <block
            v-for="(thCateItem, index) in subCategoryList"
            :key="index"
          >
            <view class="sub-category">
              <view
                class="sub-category-item"
                :data-categoryid="thCateItem.categoryId"
                :data-parentid="thCateItem.parentId"
                @tap="toCatePage"
              >
                <image
                  :src="thCateItem.pic"
                  class="more-pic"
                  mode="widthFix"
                />
                <text>{{ thCateItem.categoryName }}</text>
              </view>
            </view>
          </block>
        </view>
        <view
          v-else
          class="cont-item empty"
        >
          该分类下暂无子分类~
        </view>
      </scroll-view>
      <!-- 右侧内容end -->
    </view>
  </view>
</template>

<script setup>
const categoryList = ref([])
const subCategoryList = ref([])
const categoryImg = ref('')
const parentId = ref('')
/**
 * 生命周期函数--监听页面加载
 */
onLoad(() => {
  // 加载分类列表
  http.request({
    url: '/category/categoryInfo',
    method: 'GET',
    data: {
      parentId: ''
    }
  })
    .then(({ data }) => {
      categoryImg.value = data[0].pic
      categoryList.value = data
      getProdList(data[0].categoryId)
      parentId.value = categoryList.value[0].categoryId
    })
})

const selIndex = ref(0)
/**
 * 分类点击事件
 */
const onMenuTab = (e) => {
  const index = e.currentTarget.dataset.index
  getProdList(categoryList.value[index].categoryId)
  parentId.value = categoryList.value[index].categoryId
  categoryImg.value = categoryList.value[index].pic
  selIndex.value = index
}

/**
 * 跳转搜索页
 */
const toSearchPage = () => {
  uni.navigateTo({
    url: '/pages/search-page/search-page'
  })
}

const getProdList = (categoryId) => {
  // 加载分类列表
  http.request({
    url: '/category/categoryInfo',
    method: 'GET',
    data: {
      parentId: categoryId
    }
  })
    .then(({ data }) => {
      subCategoryList.value = data
    })
}

/**
 * 跳转子分类商品页面
 */
const toCatePage = (e) => {
  const { parentid, categoryid } = e.currentTarget.dataset
  uni.navigateTo({
    url: `/pages/sub-category/sub-category?parentId=${parentid}&categoryId=${categoryid}`
  })
}

</script>

<style scoped lang="scss">
@import "./category.scss";
</style>
