<template>
  <a-modal
    title="授权菜单"
    :width="600"
    :visible="visible"
    :confirmLoading="confirmLoading"
    @ok="handleSubmit"
    @cancel="handleCancel"
  >
    <a-spin :spinning="formLoading">
      <a-form :form="form">

        <a-form-item
          label="菜单权限"
          :labelCol="labelCol"
          :wrapperCol="wrapperCol">

          <a-tree
            v-model="checkedKeys"
            multiple
            checkable
            :auto-expand-parent="autoExpandParent"
            :expanded-keys="expandedKeys"
            :tree-data="menuTreeData"
            :selected-keys="selectedKeys"
            :replaceFields="replaceFields"
            @expand="onExpand"
            @check="onCheck"
          />
        </a-form-item>

      </a-form>

    </a-spin>
  </a-modal>
</template>

<script>
import {SysMenuTreeForGrant} from '@/api/modular/system/menuManage'
import {sysRoleOwnMenu, sysRoleGrantMenu} from '@/api/modular/system/roleManage'

export default {
  data() {
    return {
      labelCol: {
        style: {'padding-right': '20px'},
        xs: {span: 24},
        sm: {span: 5}
      },
      wrapperCol: {
        xs: {span: 24},
        sm: {span: 15}
      },
      menuTreeData: [],
      expandedKeys: [],
      checkedKeys: [],
      visible: false,
      confirmLoading: false,
      formLoading: true,
      autoExpandParent: true,
      selectedKeys: [],
      subValues: [],
      roleEntity: [],
      replaceFields: {
        key: 'id'
      },
      form: this.$form.createForm(this),
      commitKeys: [],
      leastChilds: []
    }
  },
  methods: {
    // 初始化方法
    roleMenu(record) {
      this.formLoading = true
      this.roleEntity = record
      this.visible = true
      this.getMenuTree()
    },

    /**
     * 获取菜单列表
     */
    getMenuTree() {
      const _this = this
      SysMenuTreeForGrant().then((res) => {
        if (res.success) {
          _this.menuTreeData = res.data
          _this.getLeastChilds(res.data)
          // 默认展开目录级
          _this.menuTreeData.forEach(item => {
            _this.expandedKeys.push(item.id)
          })

          _this.expandedMenuKeys(_this.roleEntity)
        }
      })
    },

    getLeastChilds(data){
      for (let i = 0; i < data.length; i++) {
        this.pushLeastChilds(data[i])
      }
    },

    pushLeastChilds(e) {
      if (e.children.length > 0) {
        this.getLeastChilds(e.children)
        return
      }
      this.leastChilds.push(e.id)
    },

    /**
     * 此角色已有菜单权限
     */
    expandedMenuKeys(record) {
      const _this = this
      sysRoleOwnMenu({id: record.id}).then((res) => {
        if (res.success) {
          _this.pickCheckedKeys(res.data)
          _this.commitKeys = res.data
        }
        _this.formLoading = false
      })
    },

    pickCheckedKeys(data){
      for (let i = 0; i < data.length; i++) {
        if (this.leastChilds.includes(data[i])) {
          this.checkedKeys.push(data[i])
        }
      }
    },

    onExpand(expandedKeys) {
      this.expandedKeys = expandedKeys
      this.autoExpandParent = false
    },

    onCheck(checkedKeys, info) {
      this.checkedKeys = checkedKeys
      this.commitKeys = checkedKeys.concat(info.halfCheckedKeys);
    },

    onSelect(selectedKeys, info) {
      console.log(selectedKeys)
      console.log(info)
      this.selectedKeys = selectedKeys
    },

    handleSubmit() {
      const _this = this;
      const {form: {validateFields}} = this
      this.confirmLoading = true
      validateFields((errors, values) => {
        if (!errors) {
          sysRoleGrantMenu({id: _this.roleEntity.id, grantMenuIdList: _this.commitKeys}).then((res) => {
            if (res.success) {
              _this.$message.success('授权成功')
              _this.confirmLoading = false
              _this.$emit('ok', values)
              _this.handleCancel()
            } else {
              _this.$message.error('授权失败：' + res.message)
            }
          }).finally((res) => {
            _this.confirmLoading = false
          })
        } else {
          _this.confirmLoading = false
        }
      })
    },
    handleCancel() {
      // 清空已选择的
      this.checkedKeys = []
      // 清空已展开的
      this.expandedKeys = []
      this.visible = false
    }
  }
}
</script>