<template>
  <div class="selection">
    <el-select placeholder="請選擇" v-model="nameList" clearable @clear="handleClear" ref="selectUpResId" style="width: 100%">
      <el-option hidden :key="1" :value="1"></el-option
      ><!--這個必不可少否則顯示不出來下拉數據-->
      <!-- check-strictly :父子是否聯(lián)動，根據業(yè)務修改 -->
      <el-tree
        :data="options"
        node-key="id"
        :props="defaultProps"
        :default-checked-keys="huixianarr"
        @check="handleNodeClick"
        show-checkbox
        ref="treeRef"
        :check-strictly="true"
      >
      </el-tree>
    </el-select>
  </div>
</template>
<script setup name="selects">
import { ref, reactive } from "vue";
//接受父組件傳來的數據
const props = defineProps({
  treeFilterData: {
    type: Array,
    default: () => [] //樹形控件數據源
  },
  treeHxlist: {
    type: Array,
    default: () => [] //回顯ID集合，根據業(yè)務修改
  },
  dfProps: {
    type: Object,
    default: () => {} //樹形控件配置項，根據業(yè)務修改
  }
});
const treeRef = ref();
let nameList = ref("");
let huixianarr = ref([]);
let idList = ref();
let options = ref([]);
let defaultProps = ref({});
defaultProps.value = props.dfProps;
let hxlist = ref([]);
let treeForm = ref();
let list = ref();
var propertyName = props.dfProps.label;
init();
function init() {
  options.value = props.treeFilterData;
  huixianarr.value = props.treeHxlist;
  let hxlist = findPathsByIds(options.value, huixianarr.value);
  nameList.value = hxlist.join(","); //顯示內容
}
const emit = defineEmits(["checKedId"]);
function handleNodeClick(data, lst) {
  let arr = [],
    name = [];
  lst.checkedNodes.forEach(item => {
    //過濾拿到選中的id
    arr.push(item.id);
  });
  lst.checkedNodes.forEach(item => {
    //過濾拿到選中的name

    name.push(item[propertyName]);
  });
  nameList.value = name.join(","); //顯示內容
  idList.value = arr; //后臺傳參需要的id
  //傳給父組件

  emit("checKedId", idList.value);
}
function handleClear() {
  hxlist.value = [];
  idList.value = []; //id集合
  nameList.value = ""; //input顯示內容
  huixianarr.value = []; //回顯ID集合
  treeRef.value.setCheckedKeys([]); //清空
}
function findPathsByIds(data, targetIds) {
  const resultPaths = []; // 存儲匹配的 title

  // 輔助函數：遞歸查找單個 id 的 title
  function findPathRecursive(items, targetId) {
    for (const item of items) {
      // 如果當前項的 id 匹配，添加其 title 到結果數組
      if (item.id === targetId) {
        resultPaths.push(item[propertyName]);
        return; // 找到后直接返回
      }

      // 如果有 children，遞歸查找
      if (item.children && item.children.length > 0) {
        findPathRecursive(item.children, targetId);
      }
    }
  }

  // 遍歷目標 id 數組，逐一查找
  for (const id of targetIds) {
    findPathRecursive(data, id);
  }
  return resultPaths;
}
</script>
<style scoped>
.selection {
  width: 300px;
}
</style>

 <Selectoption :treeFilterData="treeFilterData" :treeHxlist="treeHxlist" :dfProps="dfProps" @checKedId="gettreelist" />
//回顯
const treeFilterData = ref([1]); 
//格式
let dfProps = ref({
  children: "children",
  label: "title"
});  
//數據
const treeFilterData = ref([
    {
      "id": 1,
      "path": "/home/index",
      "name": "home",
      "component": "/home/index",
      "title": "首頁",
      "meta": {
        "icon": "HomeFilled",
        "title": "首頁",
        "isLink": "",
        "isHide": false,
        "isFull": false,
        "isAffix": true,
        "isKeepAlive": true
      }
    },
    {
      "id": 6,
      "path": "/system",
      "name": "system",
      "redirect": "/system/accountManage",
      "title": "系統(tǒng)管理",
      "meta": {
        "icon": "Tools",
        "title": "系統(tǒng)管理",
        "isLink": "",
        "isHide": false,
        "isFull": false,
        "isAffix": false,
        "isKeepAlive": true
      },
      "children": [
        {
          "id": 61,
          "father": 6,
          "path": "/system/accountManage",
          "name": "accountManage",
          "component": "/system/accountManage/index",

          "title": "賬號管理",
          "meta": {
            "icon": "Menu",
            "title": "賬號管理",
            "isLink": "",
            "isHide": false,
            "isFull": false,
            "isAffix": false,
            "isKeepAlive": true
          }
        },
        
        
      ]
    }
  ]);