<template>
  <a-card :bordered="false" :class="'cust-erp-sub-tab'">
    <!-- 操作按钮区域 -->
    <div class="table-operator">
      <a-button @click="handleAdd" type="primary" icon="plus" v-if="user_name==='admin'">新增</a-button>
      <a-button type="primary" icon="download" @click="handleExportXls('章节')">导出</a-button>
      <a-upload
        name="file"
        :showUploadList="false"
        :multiple="false"
        :headers="tokenHeader"
        :action="importExcelUrl"
        @change="handleImportExcel">
        <a-button type="primary" icon="import" v-if="user_name==='admin'">导入</a-button>
      </a-upload>
      <a-dropdown v-if="selectedRowKeys.length > 0">
        <a-menu slot="overlay">
          <a-menu-item key="1" @click="batchDel">
            <a-icon type="delete"/>
            删除
          </a-menu-item>
        </a-menu>
        <a-button style="margin-left: 8px"> 批量操作
          <a-icon type="down"/>
        </a-button>
      </a-dropdown>
    </div>

    <!-- table区域-begin -->
    <div>
      <div class="ant-alert ant-alert-info" style="margin-bottom: 16px;">
        <i class="anticon anticon-info-circle ant-alert-icon"></i> 已选择 <a
        style="font-weight: 600">{{ selectedRowKeys.length }}</a>项
        <a style="margin-left: 24px" @click="onClearSelected">清空</a>
      </div>

      <a-table
        bordered
        ref="table"
        size="middle"
        rowKey="id"
        :columns="columns"
        :dataSource="dataSource"
        :pagination="ipagination"
        :loading="loading"
        :expandedRowKeys="expandedRowKeys"
        @change="handleTableChange"
        @expand="handleExpand"
        v-bind="tableProps">

        <template slot="htmlSlot" slot-scope="text">
          <div v-html="text"></div>
        </template>
        <template slot="imgSlot" slot-scope="text">
          <span v-if="!text" style="font-size: 12px;font-style: italic;">无图片</span>
          <img v-else :src="getImgView(text)" height="25px" alt=""
               style="max-width:80px;font-size: 12px;font-style: italic;"/>
        </template>
        <template slot="fileSlot" slot-scope="text">
          <span v-if="!text" style="font-size: 12px;font-style: italic;">无文件</span>
          <a-button
            v-else
            :ghost="true"
            type="primary"
            icon="download"
            size="small"
            @click="downloadFile(text)">
            下载
          </a-button>
        </template>

        <span slot="action" slot-scope="text, record">
          <a @click="handleEdit(record)">编辑</a>
          <a-divider type="vertical"/>
          <a-popconfirm title="确定删除吗?" @confirm="() => handleDelete(record.id)" v-if="user_name==='admin'">
            <a>删除</a>
          </a-popconfirm>
        </span>

      </a-table>
    </div>

    <seChapter-modal ref="modalForm" @ok="modalFormOk" :mainId="mainId"></seChapter-modal>
  </a-card>
</template>

<script>
import { getAction, deleteAction } from '@/api/manage'
import {JeecgListMixin} from '@/mixins/JeecgListMixin'
import SeChapterModal from './modules/SeChapterModal'
import { filterObj } from '@/utils/util';
import Vue from 'vue'
import { USER_INFO } from "@/store/mutation-types"

export default {
  name: "SeChapterList",
  mixins: [JeecgListMixin],
  components: {SeChapterModal},
  props: {
    mainId: {
      type: String,
      default: '',
      required: false
    }
  },
  watch: {
    mainId: {
      immediate: false,
      handler(val) {
        if (!this.mainId) {
          this.clearList()
        } else {
          this.queryParam['courseid'] = val
          this.loadData(1);
        }
      }
    }
  },
  data() {
    return {
      description: '课程管理页面',
      disableMixinCreated: true,
      // 表头
      columns: [
        {
          title: '名称',
          align: "left",
          dataIndex: 'name'
        },
        {
          title: '简介',
          align: "center",
          dataIndex: 'content'
        },
        {
          title: '课程目标',
          align: "center",
          dataIndex: 'courseobjectivesid_dictText',
        },
        {
          title: '要求',
          align: "center",
          dataIndex: 'requirement'
        },
        {
          title: '总学时',
          align: "center",
          dataIndex: 'totalclasshours'
        },
        {
          title: '线上学时',
          align: "center",
          dataIndex: 'onlinclasshours'
        },
        {
          title: '操作',
          dataIndex: 'action',
          align: "center",
          fixed: "right",
          width: 147,
          scopedSlots: {customRender: 'action'},
        }
      ],
      url: {
        list: "/course/seCourse/listSeChapterByMainId",
        childList: "/course/seCourse/childList",
        getChildListBatch: "/course/seCourse/getChildListBatch",
        delete: "/course/seCourse/deleteSeChapter",
        deleteBatch: "/course/seCourse/deleteBatchSeChapter",
        exportXlsUrl: "/course/seCourse/exportSeChapter",
        importUrl: "/course/seCourse/importSeChapter",
      },
      dictOptions: {
        depid: [],
        category: [],
      },
      expandedRowKeys: [],
      hasChildrenField: "hasChild",
      pidField: "pid",
      loadParent: false,
      user_name:''
    }
  },
  created() {
    this.user_name = Vue.ls.get(USER_INFO).username;
  },
  computed: {
    importExcelUrl() {
      return `${window._CONFIG['domianURL']}/${this.url.importUrl}/${this.mainId}`;
    }, tableProps() {
      let _this = this
      return {
        // 列表项是否可选择
        rowSelection: {
          selectedRowKeys: _this.selectedRowKeys,
          onChange: (selectedRowKeys) => _this.selectedRowKeys = selectedRowKeys
        }
      }
    }
  },
  methods: {
    loadData(arg){
      if(arg==1){
        this.ipagination.current=1
      }
      this.loading = true
      let params = this.getQueryParams()
      getAction(this.url.list,params).then(res=>{
        if(res.success){
          console.log(res.result.records)
          let result = res.result
          if(Number(result.total)>0){
            this.ipagination.total = Number(result.total)
            this.dataSource = this.getDataByResult(res.result.records)
            return this.loadDataByExpandedRows(this.dataSource)
          }else{
            this.ipagination.total=0
            this.dataSource=[]
          }
        }else{
          this.$message.warning(res.message)
        }
      }).finally(()=>{
        this.loading = false
      })
    },
    // 根据已展开的行查询数据（用于保存后刷新时异步加载子级的数据）
    loadDataByExpandedRows(dataList) {
      if (this.expandedRowKeys.length > 0) {
        return getAction(this.url.getChildListBatch,{ parentIds: this.expandedRowKeys.join(',') }).then(res=>{
          if (res.success && res.result.records.length>0) {
            //已展开的数据批量子节点
            let records = res.result.records
            const listMap = new Map();
            for (let item of records) {
              let pid = item.pid;
              if (this.expandedRowKeys.join(',').includes(pid)) {
                let mapList = listMap.get(pid);
                if (mapList == null) {
                  mapList = [];
                }
                mapList.push(item);
                listMap.set(pid, mapList);
              }
            }
            let childrenMap = listMap;
            let fn = (list) => {
              list.forEach(data => {
                if (this.expandedRowKeys.includes(data.id)) {
                  data.children = this.getDataByResult(childrenMap.get(data.id))
                  fn(data.children)
                }
              })
            }
            fn(dataList)
          }
        })
      } else {
        return Promise.resolve()
      }
    },
    getQueryParams(arg) {
      //获取查询条件
      let sqp = {}
      let param = {}
      if(this.superQueryParams){
        sqp['superQueryParams']=encodeURI(this.superQueryParams)
        sqp['superQueryMatchType'] = this.superQueryMatchType
      }
      if(arg){
        param = Object.assign(sqp,this.filters);
      }else{
        param = Object.assign(sqp, this.queryParam,this.filters);
      }
      param.field = this.getQueryField();
      param.pageNo = this.ipagination.current;
      param.pageSize = this.ipagination.pageSize;
      return filterObj(param);
    },
    searchReset() {
      //重置
      this.expandedRowKeys = []
      this.queryParam = {}
      this.loadData(1);
    },
    getDataByResult(result){
      if(result){
        return result.map(item=>{
          //判断是否标记了带有子节点
          if(item[this.hasChildrenField]=='1'){
            let loadChild = { id: item.id+'_loadChild', name: 'loading...', isLoading: true }
            item.children = [loadChild]
          }
          return item
        })
      }
    },
    handleExpand(expanded, record){
      // 判断是否是展开状态
      if (expanded) {
        this.expandedRowKeys.push(record.id)
        if (record.children.length>0 && record.children[0].isLoading === true) {
          let params = this.getQueryParams();//查询条件
          params[this.pidField] = record.id
          getAction(this.url.childList,params).then((res)=>{
            if(res.success){
              if(res.result.records){
                record.children = this.getDataByResult(res.result.records)
                this.dataSource = [...this.dataSource]
              }else{
                record.children=''
                record.hasChildrenField='0'
              }
            }else{
              this.$message.warning(res.message)
            }
          })
        }
      }else{
        let keyIndex = this.expandedRowKeys.indexOf(record.id)
        if(keyIndex>=0){
          this.expandedRowKeys.splice(keyIndex, 1);
        }
      }
    },
    handleAddChild(record){
      this.loadParent = true
      let obj = {}
      obj[this.pidField] = record['id']
      this.$refs.modalForm.add(obj);
    },
    handleDeleteNode(record) {
      if(!this.url.delete){
        this.$message.error("请设置url.delete属性!")
        return
      }
      var that = this;
      deleteAction(that.url.delete, {id: record.id}).then((res) => {
        if (res.success) {
          that.loadData(1)
        } else {
          that.$message.warning(res.message);
        }
      });
    },

  }
}
</script>
<style scoped>
@import '~@assets/less/common.less'
</style>
