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<template>
  <div>
    <p>
      <vxe-button @click="expandEvent1">BUG测试</vxe-button>
    </p>

    <vxe-table border ref="xTable" :row-config="{ keyField: 'id'}" :column-config="{ resizable: true }" :tree-config="treeConfig" :data="tableData">
      <vxe-column type="seq" width="60"></vxe-column>
      <vxe-column field="name" title="Name" width="400" tree-node></vxe-column>
    </vxe-table>
  </div>
</template>

<script lang="ts" setup>
  import { ref, reactive } from 'vue'
  import { VxeTablePropTypes, VxeTableInstance } from 'vxe-table'

  interface RowVO {
    id: number
    parentId: number | null
    name: string
    type: string
    size: number
    date: string
    hasChild?: boolean
  }

  const xTable = ref<VxeTableInstance<RowVO>>()

  const tableData = ref<RowVO[]>([
    { id: 10000, parentId: null, name: 'test abc1', type: 'mp3', size: 1024, date: '2020-08-01' },
    { id: 10050, parentId: null, name: 'Test2', type: 'mp4', size: 0, date: '2021-04-01', hasChild: true },
    { id: 23666, parentId: null, name: 'Test23', type: 'mp4', size: 0, date: '2021-01-02', hasChild: true },
    { id: 24555, parentId: null, name: 'test abc9', type: 'avi', size: 224, date: '2020-10-01' },
  ])

  // 模拟后台
  const fetchChildListApi = (parentRow: RowVO) => {
    return new Promise<RowVO[]>(resolve => {
      setTimeout(() => {
        const childs = [
          { id: parentRow.id + 1000000, parentId: parentRow.id, name: parentRow.name + 'Test111111111111', type: 'mp4', size: 0, date: '2021-10-03', hasChild: true },
          { id: parentRow.id + 1500000, parentId: parentRow.id, name: parentRow.name + 'Test222222222222', type: 'mp3', size: 0, date: '2021-07-09', hasChild: false },
        ]
        resolve(childs)
      }, 500)
    })
  }

  const treeConfig = reactive<VxeTablePropTypes.TreeConfig<RowVO>>({
    line: true, //设为true之后含二级及以上子节点会报错
    transform: true,
    rowField: 'id',
    parentField: 'parentId',
    lazy: true,
    hasChild: 'hasChild',
    loadMethod({ row }) {
      // 异步加载子节点
      return fetchChildListApi(row)
    },
  })

  const expandEvent1 = () => {
    const $table = xTable.value
    if ($table) {
      $table.setTreeExpand(tableData.value[1], true).then(() => {
        $table.setTreeExpand(tableData.value[1].children[0], true).then(() => {
          $table.reloadTreeExpand(tableData.value[1])
        })
      })
    }
  }
</script>