export default {

  // 添加搜索首頁(yè)歷史查詢記錄
  addSearchHistory(state, payload) {
    // list中包含該記錄的時(shí)，刪除
    const index = state.searchHistoryList.indexOf(payload);
    if (index > -1) {
      state.searchHistoryList.splice(index, 1);
    }
    state.searchHistoryList.unshift(payload);
    // 歷史記錄中最大記20個(gè)記錄
    const count = state.searchHistoryList.length;
    state.searchHistoryList.splice(20, count);
  },

  // 清除搜索首頁(yè)歷史查詢記錄
  clearSearchHistory(state) {
    state.searchHistoryList = [];
  },
};

<template>
  <!-- 搜索框 -->
  <search-bar
    @searchClick="searchClick"
    :placeholderValue="state.placeholderValue"
    :searchVal="state.searchVal">
  </search-bar>
  <div class="search">

    <!-- 搜索歷史 -->
    <div class="history" v-if="state.isShowHistory">
      <span class="proHot">搜索歷史</span>
      <span class="delHotSearch" @click="delHostClick">清除歷史</span>

      <!-- 存放歷史記錄信息 -->
      <div class="searchBtn-div">
        <span v-for="(item, index) in state.historyList" :key="index" class="searchValBtn" >
        <van-button
          round
          size="small"
          @click="searchValClick(item)"
          >{{ item }}
        </van-button>
      </span>
      </div>
    </div>
  </div>
</template>

<script>
import {
  onMounted,
  reactive,
  getCurrentInstance,
} from 'vue';
import { Toast, Dialog } from 'vant';
import searchBar from '@/components/SearchBar.vue';
import { useRouter } from 'vue-router';
import { useStore } from 'vuex';

export default {

  components: {
    searchBar,
  },

  setup() {
    const router = useRouter();
    const store = useStore();
    const { proxy } = getCurrentInstance();
    const state = reactive({
      isShowHistory: '', // 是否顯示歷史記錄
      searchVal: '', // 搜索關(guān)鍵字
      placeholderValue: '搜索產(chǎn)品/資訊/標(biāo)準(zhǔn)/成分/企業(yè)',
      historyList: [], // 歷史搜索數(shù)據(jù)
    });


    // 回車(chē)搜索
    const searchClick = (val) => {
      store.commit('addSearchHistory', val);
      // router.push({ path: '/search-detail', query: { searchVal: val } });
    };

    // 清除歷史記錄
    const delHostClick = async () => {
      Dialog.confirm({
        message: '確定要?jiǎng)h除歷史搜索嗎？',
      }).then(() => {
        store.commit('clearSearchHistory', store);
        state.isShowHistory = false;
        Toast({
          message: '刪除成功',
          position: 'bottom',
        });
      });
    };
	
	// 初始化獲取歷史搜索記錄信息
    onMounted(async () => {
      // 獲取歷史搜索信息
      state.historyList = store.state.searchHistoryList;
      // 判斷初始化是否顯示歷史搜索
      if (state.historyList.length > 0) {
        state.isShowHistory = true;
      } else {
        state.isShowHistory = false;
      }
    });

    return {
      state,
      searchClick,
      delHostClick,
    };
  },
};
</script>

<style lang="less" scoped>
</style>

import { useStore } from 'vuex';

const store = useStore();

// 初始化獲取歷史搜索記錄信息
	// 每次加載這和頁(yè)面都會(huì)首先調(diào)用這個(gè)方法，來(lái)取最新的信息
    onMounted(async () => {
      // 獲取歷史搜索信息
      state.historyList = store.state.searchHistoryList;
      // 判斷初始化是否顯示歷史搜索
      if (state.historyList.length > 0) {
        state.isShowHistory = true;
      } else {
        state.isShowHistory = false;
      }
    })

// 子組件發(fā)射一個(gè)事件，父組件調(diào)用
    const searchClick = (val) => {
    	// 將搜索值放入歷史記錄中	
      store.commit('addSearchHistory', val);
      // 路由跳轉(zhuǎn)可以忽略
      // router.push({ path: '/search-detail', query: { searchVal: val } });
    };

// 清除歷史記錄
    const delHostClick = async () => {
      Dialog.confirm({
        message: '確定要?jiǎng)h除歷史搜索嗎？',
      }).then(() => {
      	// 清空歷史記錄信息
        store.commit('clearSearchHistory', store);
        state.isShowHistory = false;
        Toast({
          message: '刪除成功',
          position: 'bottom',
        });
      });
    };