<template>
  <div class="app-container">
    <el-form :model="queryParams" ref="queryForm" size="small" :inline="true" v-show="showSearch">
      <el-form-item label="分类字典名称" prop="name">
        <el-input v-model="queryParams.name" placeholder="请输入分类字典名称" clearable @keyup.enter.native="handleQuery"/>
      </el-form-item>
      <el-form-item label="分类字典编码" prop="code">
        <el-input v-model="queryParams.code" placeholder="请输入分类字典编码" clearable @keyup.enter.native="handleQuery"/>
      </el-form-item>
      <el-form-item>
        <el-button type="primary" icon="el-icon-search" @click="handleQuery">搜索</el-button>
        <el-button icon="el-icon-refresh" @click="resetQuery">重置</el-button>
      </el-form-item>
    </el-form>

    <el-row :gutter="10" class="mb8">
      <el-col :span="1.5">
        <el-button type="primary" plain icon="el-icon-plus" size="mini" @click="handleAdd"
                   v-hasPermi="['system:category:create']">新增</el-button>
      </el-col>
      <el-col :span="1.5">
        <el-button type="info" plain icon="el-icon-sort" size="mini" @click="toggleExpandAll">展开/折叠</el-button>
      </el-col>
      <right-toolbar :showSearch.sync="showSearch" @queryTable="getList"></right-toolbar>
    </el-row>

    <el-table v-if="refreshTable" v-loading="loading" :data="categoryList" row-key="id" :default-expand-all="isExpandAll"
              :tree-props="{children: 'children', hasChildren: 'hasChildren'}">
      <el-table-column prop="name" label="分类字典名称" width="260"></el-table-column>
      <el-table-column prop="code" label="分类字典编码" width="260"></el-table-column>
      <el-table-column prop="sort" label="排序" width="100"></el-table-column>
      <el-table-column prop="remark" label="备注" width="260"></el-table-column>
      <el-table-column label="操作" align="center" class-name="small-padding fixed-width">
        <template v-slot="scope">
          <el-button size="mini" type="text" icon="el-icon-edit" @click="handleUpdate(scope.row)"
                     v-hasPermi="['system:category:update']">修改</el-button>
          <el-button size="mini" type="text" icon="el-icon-plus" @click="handleAdd(scope.row)"
                     v-hasPermi="['system:category:create']">新增</el-button>
          <el-button v-if="scope.row.pid !== 0" size="mini" type="text" icon="el-icon-delete"
                     @click="handleDelete(scope.row)" v-hasPermi="['system:category:delete']">删除</el-button>
        </template>
      </el-table-column>
    </el-table>

    <!-- 添加或修改分类字典对话框 -->
    <el-dialog :title="title" :visible.sync="open" width="600px" append-to-body>
      <el-form ref="form" :model="form" :rules="rules" label-width="120px">
        <el-row>
          <el-col :span="24">
            <el-form-item label="上级分类字典" prop="pid">
              <treeselect v-model="form.pid" :options="categoryOptions" :normalizer="normalizer" placeholder="选择上级分类字典" />
            </el-form-item>
          </el-col>
          <el-col :span="24">
            <el-form-item label="分类字典名称" prop="name">
              <el-input v-model="form.name" placeholder="请输入分类字典名称" />
            </el-form-item>
          </el-col>
          <el-col :span="24">
            <el-form-item label="分类字典编码" prop="code">
              <el-input v-model="form.code" placeholder="请输入分类字典编码" />
            </el-form-item>
          </el-col>
          <el-col :span="24">
            <el-form-item label="显示排序" prop="sort">
              <el-input-number v-model="form.sort" controls-position="right" :min="0" />
            </el-form-item>
          </el-col>
          <el-col :span="24">
            <el-form-item label="备注" prop="remark">
              <el-input v-model="form.remark" placeholder="请输入备注" />
            </el-form-item>
          </el-col>
        </el-row>
      </el-form>
      <div slot="footer" class="dialog-footer">
        <el-button type="primary" @click="submitForm">确 定</el-button>
        <el-button @click="cancel">取 消</el-button>
      </div>
    </el-dialog>
  </div>
</template>

<script>
import { listCategory, getCategory, delCategory, addCategory, updateCategory } from "@/api/system/category";
import Treeselect from "@riophae/vue-treeselect";
import "@riophae/vue-treeselect/dist/vue-treeselect.css";

export default {
  name: "SystemCategory",
  components: { Treeselect },
  data() {
    return {
      // 遮罩层
      loading: true,
      // 显示搜索条件
      showSearch: true,
      // 表格树数据
      categoryList: [],
      // 分类字典树选项
      categoryOptions: [],
      // 弹出层标题
      title: "",
      // 是否显示弹出层
      open: false,
      // 是否展开，默认全部展开
      isExpandAll: true,
      // 重新渲染表格状态
      refreshTable: true,
      // 是否展开
      expand: false,
      // 查询参数
      queryParams: {
        name: undefined,
        code: undefined
      },
      // 表单参数
      form: {
        id: undefined,
        pid: undefined,
        name: undefined,
        code: undefined,
        sort:0,
        remark: undefined,
      },
      // 表单校验
      rules: {
        name: [
          { required: true, message: "分类字典名称不能为空", trigger: "blur" }
        ],
        code: [
          { required: true, message: "分类字典编码不能为空", trigger: "blur" }
        ],
      },
    };
  },
  created() {
    this.getList();
  },
  methods: {
    /** 查询分类字典列表 */
    getList() {
      this.loading = true;
      listCategory(this.queryParams).then(response => {
        this.categoryList = this.handleTree(response.data, "id","pid","children","0");
        this.loading = false;
      });
    },
    /** 转换分类字典数据结构 */
    normalizer(node) {
      if (node.children && !node.children.length) {
        delete node.children;
      }
      return {
        id: node.id,
        label: node.name,
        children: node.children
      };
    },
    // 取消按钮
    cancel() {
      this.open = false;
      this.reset();
    },
    // 表单重置
    reset() {
      this.form = {
        id: undefined,
        pid: undefined,
        name: undefined,
        code: undefined,
        sort:0,
        remark: undefined,
      };
      this.resetForm("form");
    },
    /** 搜索按钮操作 */
    handleQuery() {
      this.getList();
    },
    /** 重置按钮操作 */
    resetQuery() {
      this.resetForm("queryForm");
      this.handleQuery();
    },
    /** 新增按钮操作 */
    handleAdd(row) {
      this.reset();
      if (row !== undefined) {
        this.form.pid = row.id;
      }
      this.open = true;
      this.title = "添加分类字典";
      listCategory().then(response => {
	        this.categoryOptions = this.handleTree(response.data, "id","pid","children","0");
      });
    },
    /** 展开/折叠操作 */
    toggleExpandAll() {
      this.refreshTable = false;
      this.isExpandAll = !this.isExpandAll;
      this.$nextTick(() => {
        this.refreshTable = true;
      });
    },
    /** 修改按钮操作 */
    handleUpdate(row) {
      this.reset();
      getCategory(row.id).then(response => {
        this.form = response.data;
        if (this.form.pid === "0") { // 无父分类字典时，标记为 undefined，避免展示为 Unknown
          this.form.pid = undefined;
        }
        this.open = true;
        this.title = "修改分类字典";
      });
      listCategory(row.id).then(response => {
	        this.categoryOptions = this.handleTree(response.data, "id","pid","children","0");
      });
    },
    /** 提交按钮 */
    submitForm: function() {
      this.$refs["form"].validate(valid => {
        if (valid) {
          if (this.form.id !== undefined) {
            updateCategory(this.form).then(response => {
              this.$modal.msgSuccess("修改成功");
              this.open = false;
              this.getList();
            });
          } else {
            addCategory(this.form).then(response => {
              this.$modal.msgSuccess("新增成功");
              this.open = false;
              this.getList();
            });
          }
        }
      });
    },
    /** 删除按钮操作 */
    handleDelete(row) {
      this.$modal.confirm('是否确认删除名称为"' + row.name + '"的数据项?').then(function() {
          return delCategory(row.id);
        }).then(() => {
          this.getList();
          this.$modal.msgSuccess("删除成功");
      }).catch(() => {});
    }
  }
};
</script>