<script>
import { refer } from "./api/index";
export default {
  name: "PopoverSelect",
  props: {
    // 参照类型 ，对应后端
    type: {
      type: String,
      require: true,
    },
    // v-model
    value: {
      type: [Array, String],
      require: true,
    },
    // 参照弹窗标题
    title: {
      type: String,
      dafault: () => {
        return "TITEL";
      },
    },
    // 作为 value 唯一标识的键名，绑定值
    valueKey: {
      type: String,
      dafault: () => {
        return "code";
      },
    },
    // 默认查询参数
    queryParams: {
      type: Object,
      default: () => ({}),
    },
    // 组件大小
    size: {
      type: String,
      dafault: () => {
        return "mini";
      },
    },
    // 提示
    placeholder: {
      type: String,
      dafault: () => {
        return "";
      },
    },
    // 是否可读
    readonly: {
      type: Boolean,
      dafault: () => {
        return false;
      },
    },
    // 是否禁止
    disabled: {
      type: Boolean,
      dafault: () => {
        return false;
      },
    },
    // 是否清除
    clearable: {
      type: Boolean,
      dafault: () => {
        return false;
      },
    },
    // 是否多选
    multiple: {
      type: Boolean,
      dafault: () => {
        return false;
      },
    },
    // 需映射源数据
    source: Object,
    // 参照内外映射
    dataMapping: Object,
  },
  components: {},
  data() {
    return {
      width: "50%",
      page: { pageNum: 1, pageSize: 25, total: 0 },
      layout: "total, prev, pager, next, sizes, jumper",
      pageSizes: [25, 50, 100],
      visible: false,
      loading: false,
      model: {
        search: "",
        isPage: true,
      },
      data: [],
      selectData: [],
    };
  },
  computed: {
    innerValue() {
      const { value, multiple } = this.$props;
      return multiple ? "" : value;
    },
    TableColumnTemp() {
      const { type } = this.$props;
      const documents = require(`./components/${type}`).default;
      return documents.filter((document) => document.key);
    },
  },
  watch: {
    "$props.value": {
      handler: function (newProp) {
        if (!newProp) this.selectData = [];
      },
      immediate: true,
    },
  },
  methods: {
    // open dialog
    async open() {
      this.visible = true;
      await this.resetList();
    },
    // hide dialog
    async hide() {
      this.visible = false;
    },
    // fetch list
    async fetchList(prop, page) {
      try {
        this.loading = true;
        const { pageNum, pageSize } = page;
        const { code, msg, rows, total } = await refer(prop, {
          pageNum,
          pageSize,
        });
        if (code === 200) {
          this.data = rows;
          this.page.total = total;
        } 
      } catch (err) {
        //
      } finally {
        this.loading = false;
      }
    },
    // reset list
    async resetList() {
      const { type, queryParams } = this.$props;
      this.model = {
        ...queryParams,
        ...this.model,
        search: "",
        type,
      };
      await this.fetchList(this.model, this.page);
    },
    // query list
    async queryList() {
      await this.fetchList(this.model, this.page);
    },
    // row click
    rowClick(prop) {
      const { multiple } = this.$props;
      // 单选
      if (!multiple) this.$refs.multipleTable.clearSelection();
      [prop].forEach((row) => this.$refs.multipleTable.toggleRowSelection(row));
    },
    // row double click
    async rowDblclick(prop) {
      const { multiple } = this.$props;
      if (!multiple) await this.confirm([prop]);
    },
    // selection change
    selectionChange(prop) {
      this.selectData = prop;
    },
    // page size change
    async pageSizeChange(prop) {
      this.page.pageSize = prop;
      await this.queryList();
    },
    // page number change
    async pageNumberChange(prop) {
      this.page.pageNum = prop;
      await this.queryList();
    },
    // confirm
    async confirm(prop) {
      const { multiple } = this.$props;
      await this.hide();
      await this.update(multiple ? prop : prop[0]);
    },
    // delete tag
    deleteTag(prop) {
      this.selectData.splice(prop, 1);
      this.update(this.selectData);
    },
    // update
    update(prop) {
      const { source, multiple, valueKey, dataMapping, type } = this.$props;
      // update v-model
      const vModel = multiple
        ? prop.map((item) => item[valueKey])
        : prop[valueKey];
      this.$emit("input", vModel);
      // update data mapping
      for (let key in dataMapping) {
        source[key] = prop[dataMapping[key]];
      }
      this.$emit("update:source", source);
      // emit change
      this.$emit("change", prop, source, type);
    },
  },
  created() {},
  mounted() {},
  destroyed() {},
};
</script>
<template>
  <div>
    <el-input
      v-model="innerValue"
      :size="size"
      :disabled="disabled"
      :readonly="readonly"
      :clearable="clearable"
      :placeholder="placeholder"
    >
      <el-button
        :disabled="disabled"
        slot="append"
        icon="el-icon-search"
        @click="open"
      ></el-button>
    </el-input>
    <el-dialog
      :title="`${title}（${multiple ? '多选' : '单选'}）`"
      :width="width"
      :visible.sync="visible"
      :close-on-click-modal="false"
      :close-on-press-escape="false"
      append-to-body
      @close="hide"
    >
      <el-form
        v-loading="loading"
        :size="size"
        :inline="true"
        :model="model"
        @submit.native.prevent
      >
        <el-form-item prop="search">
          <el-input
            v-model="model.search"
            @change="queryList"
            @keydown.enter="queryList"
          >
          </el-input>
        </el-form-item>
        <el-form-item>
          <el-button icon="el-icon-refresh" @click="resetList"></el-button>
        </el-form-item>
        <el-table
          ref="multipleTable"
          :data="data"
          :size="size"
          height="45vh"
          highlight-current-row
          style="width: 100%; margin-bottom: 20px"
          @row-click="rowClick"
          @row-dblclick="rowDblclick"
          @selection-change="selectionChange"
        >
          <el-table-column width="55" type="selection" align="center">
          </el-table-column>
          <el-table-column
            v-for="(column, index) in TableColumnTemp"
            :key="index"
            :prop="column.key"
            :label="column.title"
            :width="column.width"
            show-overflow-tooltip
          >
          </el-table-column>
        </el-table>
        <el-pagination
          :layout="layout"
          :total="page.total"
          :page-sizes="pageSizes"
          :small="size === 'mini'"
          :page-size="page.pageSize"
          :current-page="page.pageNum"
          background
          @size-change="pageSizeChange"
          @current-change="pageNumberChange"
        >
        </el-pagination>
      </el-form>
      <div style="margin-top: 20px; text-align: right">
        <el-button :size="size" @click="hide"> 取 消 </el-button>
        <el-button :size="size" @click="confirm(selectData)"> 确 定 </el-button>
      </div>
    </el-dialog>
    <div
      style="
        position: absolute;
        left: 10px;
        top: 50%;
        transform: translateY(-50%);
        padding-right: 30px;
        overflow: hidden;
      "
    >
      <div v-if="multiple && selectData.length">
        <el-popover
          :offset="-10"
          :width="width"
          :visible-arrow="false"
          title=""
          content=""
          trigger="click"
          placement="bottom-start"
        >
          <el-tag slot="reference" :size="size" style="margin-right: 10px">
            + {{ selectData.length }}
          </el-tag>
          <el-tag
            v-for="(tag, index) in selectData"
            :size="size"
            hit
            closable
            :style="{
              display: 'flex',
              justifyContent: 'space-between',
              alignItems: 'center',
              margin: selectData.length - 1 === index ? '0' : '0 0 5px 0',
            }"
            @close="deleteTag(index)"
          >
            {{ tag.name }}
          </el-tag>
        </el-popover>
      </div>
    </div>
  </div>
</template>
<style scoped></style>