<template>
  <a-card :bordered="false">

    <!-- 操作按钮区域 -->
    <div class="table-operator">
      <a-button @click="handleAdd" type="primary" icon="plus">新增</a-button>
      <a-button type="primary" icon="download" @click="handleExportXls('分类字典')">导出</a-button>
      <a-upload name="file" :showUploadList="false" :multiple="false" :headers="tokenHeader" :action="importExcelUrl"
                @change="handleImportExcel">
        <a-button type="primary" icon="import">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
        ref="table"
        size="middle"
        rowKey="id"
        :columns="columns"
        :dataSource="dataSource"
        :pagination="ipagination"
        :loading="loading"
        :expandedRowKeys="expandedRowKeys"
        @change="handleTableChange"
        @expand="handleExpand"
        v-bind="tableProps">

        <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)">
            <a>删除</a>
          </a-popconfirm>
          <a-divider type="vertical"/>
          <a @click="handleAddSub(record)">添加下级</a>
        </span>

      </a-table>
    </div>

    <sysCategory-modal ref="modalForm" @ok="modalFormOk"></sysCategory-modal>
  </a-card>
</template>

<script>

import {getAction} from '@/api/manage'
import {JeecgListMixin} from '@/mixins/JeecgListMixin'
import SysCategoryModal from './modules/SysCategoryModal'
import {deleteAction} from '@/api/manage'

export default {
  name: "SysCategoryList",
  mixins: [JeecgListMixin],
  components: {
    SysCategoryModal
  },
  data() {
    return {
      description: '分类字典管理页面',
      // 表头
      columns: [
        {
          title: '分类名称',
          align: "left",
          dataIndex: 'name'
        },
        {
          title: '分类编码',
          align: "left",
          dataIndex: 'code'
        },
        {
          title: '操作',
          dataIndex: 'action',
          align: "center",
          scopedSlots: {customRender: 'action'},
        }
      ],
      url: {
        list: "/sys/category/rootList",
        childList: "/sys/category/childList",
        getChildListBatch: "/sys/category/getChildListBatch",
        delete: "/sys/category/delete",
        deleteBatch: "/sys/category/deleteBatch",
        exportXlsUrl: "/sys/category/exportXls",
        importExcelUrl: "sys/category/importExcel",
      },
      expandedRowKeys: [],
      hasChildrenField: "hasChild",
      pidField: "pid",
      dictOptions: {},
      subExpandedKeys: [],
    }
  },
  computed: {
    importExcelUrl() {
      return `${window._CONFIG['domianURL']}/${this.url.importExcelUrl}`;
    },
    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()
      return new Promise((resolve) => {
        getAction(this.url.list, params).then(res => {
          if (res.success) {
            let result = res.result
            if (Number(result.total) > 0) {
              this.ipagination.total = Number(result.total)
              this.dataSource = this.getDataByResult(res.result.records)
              //update--begin--autor:lvdandan-----date:20201204------for：JT-31 删除成功后默认展开已展开信息
              return this.loadDataByExpandedRows(this.dataSource)
              //update--end--autor:lvdandan-----date:20201204------for：JT-31 删除成功后默认展开已展开信息
            } else {
              this.ipagination.total = 0
              this.dataSource = []
            }
          } else {
            this.$message.warning(res.message)
          }
        }).finally(() => {
          this.loading = false
        })
      })
    },
    getDataByResult(result) {
      if (result && result.length > 0) {
        return result.map(item => {
          //判断是否标记了带有子节点
          if (item[this.hasChildrenField] == '1') {
            let loadChild = {id: item.id + '_loadChild', name: 'loading...', isLoading: true}
            item.children = [loadChild]
          }
          return item
        })
      }
    },
    handleExpand(expanded, record) {
      // 判断是否是展开状态
      if (expanded) {
        this.expandedRowKeys.push(record.id)
        if (record.children.length > 0 && record.children[0].isLoading === true) {
          let params = this.getQueryParams();//查询条件
          params[this.pidField] = record.id
          getAction(this.url.childList, params).then((res) => {
            if (res.success) {
              if (res.result && res.result.length > 0) {
                record.children = this.getDataByResult(res.result)
                this.dataSource = [...this.dataSource]
              } else {
                record.children = ''
                record.hasChildrenField = '0'
              }
            } else {
              this.$message.warning(res.message)
            }
          })
        }
      } else {
        let keyIndex = this.expandedRowKeys.indexOf(record.id)
        if (keyIndex >= 0) {
          this.expandedRowKeys.splice(keyIndex, 1);
        }
      }
    },
    initDictConfig() {
    },
    modalFormOk(formData, arr) {
      if (!formData.id) {
        this.addOk(formData, arr)
      } else {
        this.editOk(formData, this.dataSource)
        this.dataSource = [...this.dataSource]
      }
    },
    editOk(formData, arr) {
      if (arr && arr.length > 0) {
        for (let i = 0; i < arr.length; i++) {
          if (arr[i].id == formData.id) {
            arr[i] = formData
            break
          } else {
            this.editOk(formData, arr[i].children)
          }
        }
      }
    },
    async addOk(formData, arr) {
      if (!formData[this.pidField]) {
        this.loadData()
      } else {
        this.expandedRowKeys = []
        console.log("22222", arr)
        for (let i of arr) {
          await this.expandTreeNode(i)
        }
      }
    },
    expandTreeNode(nodeId) {
      return new Promise((resolve, reject) => {
        this.getFormDataById(nodeId, this.dataSource)
        let row = this.parentFormData
        this.expandedRowKeys.push(nodeId)
        let params = this.getQueryParams();//查询条件
        params[this.pidField] = nodeId
        getAction(this.url.childList, params).then((res) => {
          console.log("11111", res)
          if (res.success) {
            if (res.result && res.result.length > 0) {
              row.children = this.getDataByResult(res.result)
              this.dataSource = [...this.dataSource]
              resolve()
            } else {
              row.children = ''
              row.hasChildrenField = '0'
              reject()
            }
          } else {
            reject()
          }
        })
      })
    },
    getFormDataById(id, arr) {
      if (arr && arr.length > 0) {
        for (let i = 0; i < arr.length; i++) {
          if (arr[i].id == id) {
            this.parentFormData = arr[i]
          } else {
            this.getFormDataById(id, arr[i].children)
          }
        }
      }
    },
    handleAddSub(record) {
      this.subExpandedKeys = [];
      this.getExpandKeysByPid(record.id, this.dataSource, this.dataSource)
      this.$refs.modalForm.subExpandedKeys = this.subExpandedKeys;
      this.$refs.modalForm.title = "添加子分类";
      this.$refs.modalForm.edit({'pid': record.id});
      this.$refs.modalForm.disableSubmit = false;
    },
    handleDelete: function (record) {
      let that = this;
      deleteAction(that.url.delete, {id: record.id}).then((res) => {
        if (res.success) {
          //update--begin--autor:lvdandan-----date:20201204------for：JT-31 删除成功后默认展开已展开信息
          that.loadData();
          //update--end--autor:lvdandan-----date:20201204------for：JT-31 删除成功后默认展开已展开信息
        } else {
          that.$message.warning(res.message);
        }
      });
    },
    // 添加子分类时获取所有父级id
    getExpandKeysByPid(pid, arr, all) {
      if (pid && arr && arr.length > 0) {
        for (let i = 0; i < arr.length; i++) {
          if (arr[i].id == pid) {
            this.subExpandedKeys.push(arr[i].id)
            this.getExpandKeysByPid(arr[i]['pid'], all, all)
          } else {
            this.getExpandKeysByPid(pid, arr[i].children, all)
          }
        }
      }
    },
    // 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[this.pidField];
              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) => {
              if (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()
      }
    },


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