<template>
  <div>
    <el-card class="box-card" shadow="always" :body-style="{ height: bodyHeight }" style="overflow-y: auto;">
      <el-row type="flex" justify="space-between">
        <el-col :span="12">
          <el-button-group>
            <el-button
              type="primary"
              icon="el-icon-plus"
              size="mini"
              @click="handleAdd"
              v-hasPerm="['system:menu:add']"
            >新增</el-button>
          </el-button-group>
        </el-col>
        <el-col :span="12">
          <div class="right-toolbar">
            <el-tooltip content="密度" effect="dark" placement="top">
              <el-dropdown trigger="click" @command="handleCommand">
                <el-button circle size="mini">
                  <svg-icon class-name="size-icon" icon-class="colum-height" />
                </el-button>
                <el-dropdown-menu slot="dropdown">
                  <el-dropdown-item command="medium">正常</el-dropdown-item>
                  <el-dropdown-item command="small">中等</el-dropdown-item>
                  <el-dropdown-item command="mini">紧凑</el-dropdown-item>
                </el-dropdown-menu>
              </el-dropdown>
            </el-tooltip>
            <el-tooltip content="刷新" effect="dark" placement="top">
              <el-button circle size="mini" @click="handleRefresh">
                <svg-icon class-name="size-icon" icon-class="shuaxin" />
              </el-button>
            </el-tooltip>
            <el-tooltip content="列设置" effect="dark" placement="top">
              <el-popover placement="bottom" width="100" trigger="click">
                <el-checkbox-group v-model="checkedTableColumns" @change="handleCheckedColsChange">
                  <el-checkbox
                    v-for="(item, index) in tableColumns"
                    :key="index"
                    :label="item.prop"
                  >{{ item.label }}</el-checkbox>
                </el-checkbox-group>
                <span slot="reference">
                  <el-button circle size="mini">
                    <svg-icon class-name="size-icon" icon-class="shezhi" />
                  </el-button>
                </span>
              </el-popover>
            </el-tooltip>
          </div>
        </el-col>
      </el-row>

      <el-table
        v-loading="loading"
        :data="menuTree"
        row-key="id"
        :tree-props="{children: 'children', hasChildren: 'hasChildren'}"
        border
        tooltip-effect="dark"
        :size="tableSize"
        :max-height="tableHeight"
        style="width: 100%;margin: 15px 0;"
      >
        <template v-for="(item, index) in tableColumns">
          <el-table-column
            v-if="item.show"
            :prop="item.prop"
            :label="item.label"
            :key="index"
            :formatter="item.formatter"
            align="center"
            show-overflow-tooltip
          />
        </template>
        <el-table-column label="操作" align="center" class-name="small-padding fixed-width">
          <template slot-scope="scope">
            <el-button
              size="mini"
              type="text"
              icon="el-icon-edit-outline"
              @click="handleEdit(scope.row)"
              v-hasPerm="['system:menu:edit']"
            >修改</el-button>
            <el-button
              size="mini"
              type="text"
              icon="el-icon-delete"
              @click="handleDelete(scope.row)"
              v-hasPerm="['system:menu:remove']"
            >删除</el-button>
          </template>
        </el-table-column>
      </el-table>
    </el-card>
  </div>
</template>

<script>
import { listMenu } from '@/api/system/menu'
import { construct } from '@/utils/json-tree'

export default {
  name: 'MenuList',
  data () {
    return {
      bodyHeight: document.body.offsetHeight - 130 + 'px',
      tableHeight: document.body.offsetHeight - 230 + 'px',
      // 遮罩层
      loading: true,
      // 表格头
      tableColumns: [
        { prop: 'menuName', label: '资源名称', show: true },
        {
          prop: 'menuIcon',
          label: '图标',
          show: true,
          formatter: this.menuIconFormatter
        },
        { prop: 'menuPerms', label: '权限标识', show: true },
        { prop: 'menuPath', label: '资源路由地址', show: true },
        { prop: 'menuComponent', label: '资源组件路径', show: true },
        {
          prop: 'menuType',
          label: '菜单类型',
          show: true,
          formatter: this.menuTypeFormatter
        },
        {
          prop: 'status',
          label: '状态',
          show: true,
          formatter: this.statusFormatter
        },
        { prop: 'createTime', label: '创建时间', show: true }
      ],
      // 默认选择中表格头
      checkedTableColumns: [],
      tableSize: 'medium',
      // 资源表格数据
      menuTree: []
    }
  },
  created () {
    this.getList()
    this.initCols()
  },
  methods: {
    /** 查询资源列表 */
    getList () {
      this.loading = true
      listMenu().then(response => {
        const { data } = response
        const menuList = data
        // 插件转tree
        this.menuTree = construct(menuList, {
          id: 'id',
          pid: 'parentId',
          children: 'children'
        })
        this.loading = false
      })
    },
    initCols () {
      this.checkedTableColumns = this.tableColumns.map(col => col.prop)
    },
    handleCheckedColsChange (val) {
      this.tableColumns.forEach(col => {
        if (!this.checkedTableColumns.includes(col.prop)) {
          col.show = false
        } else {
          col.show = true
        }
      })
    },
    handleCommand (command) {
      this.tableSize = command
    },
    /** 刷新列表 */
    handleRefresh () {
      this.getList()
    },
    /** 新增按钮操作 */
    handleAdd () {
      this.$emit('showForm', undefined)
    },
    /** 修改按钮操作 */
    handleEdit (row) {
      this.$emit('showForm', row.id)
    },
    /** 删除按钮操作 */
    handleDelete (row) {
      this.$confirm('选中数据将被永久删除, 是否继续？', '提示', {
        confirmButtonText: '确定',
        cancelButtonText: '取消',
        type: 'warning'
      }).then(() => {
      }).catch(() => {
      })
    },
    menuIconFormatter (row, column, cellValue, index) {
      const menuIcon = row.menuIcon
      if (menuIcon) {
        return <svg-icon class-name="size-icon" icon-class={menuIcon} />
      }
    },
    menuTypeFormatter (row, column, cellValue, index) {
      const menuType = row.menuType
      if (menuType === 0) {
        return <el-tag type="primary">目录</el-tag>
      } else if (menuType === 1) {
        return <el-tag type="warning">菜单</el-tag>
      } else if (menuType === 2) {
        return <el-tag type="info">按钮</el-tag>
      }
    },
    statusFormatter (row, column, cellValue, index) {
      const status = row.status
      if (status === 0) {
        return <el-tag type="success">禁用</el-tag>
      } else {
        return <el-tag type="success">正常</el-tag>
      }
    }
  }
}
</script>

<style lang="scss" scoped>
.right-toolbar {
  float: right;
}
</style>
