<script>
import { REFER } from "./api/index";
import deepCopy from "@gby/deep-copy";
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: Function,
      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: 10, total: 0 },
      visible: false,
      loading: false,
      model: {
        search: "",
        isPage: true,
      },
      data: [],
      selectData: [],
      lastSelectData: [],
    };
  },
  computed: {
    // innerValue() {
    //   const { value, multiple } = this.$props;
    //   return multiple ? "" : value;
    // },
    innerValue: {
      get() {
        const { value, multiple } = this.$props;
        return multiple ? "" : value;
      },
      set(val) {
        this.$emit("input", val);
      },
    },
    TableColumnTemp() {
      const { type } = this.$props;
      const documents = require(`./components/${type}`).default;
      return documents.filter((document) => document.key);
    },
  },
  watch: {
    "$props.value": {
      handler: function (newProp) {
        if (!newProp) this.lastSelectData = [];
      },
      immediate: true,
    },
  },
  methods: {
    //
    emitChange(prop) {
      const { type, source, multiple } = this.$props;
      this.$emit("change", multiple ? prop : prop[0], type, source);
    },
    // open dialog
    async open() {
      this.visible = true;
      await this.useReset();
    },
    // hide dialog
    async hide() {
      this.visible = false;
    },
    // fetch list
    async fetchList(prop, page) {
      try {
        this.loading = true;
        const { pageNum, pageSize } = page;
        const { code, rows, total } = await REFER(prop, {
          pageNum,
          pageSize,
        });
        if (code === 200) {
          this.data = rows;
          this.page.total = total;
        }
      } catch (err) {
        //
        console.error(err);
      } finally {
        this.loading = false;
      }
    },
    // reset
    async useReset() {
      const { type, source, queryParams } = this.$props;
      this.model = {
        type,
        ...this.model,
        search: "",
        ...queryParams(source),
      };
      await this.fetchList(this.model, this.page);
    },
    // query
    async useQuery() {
      await this.fetchList(this.model, this.page);
    },
    // cancel
    useCancel(prop) {
      if (prop.length) {
        const { multiple } = this.$props;
        this.useUpdate(multiple ? prop : prop[0]);
      }
      this.hide();
    },
    // confirm
    useConfirm(prop) {
      const { multiple } = this.$props;
      this.useUpdate(multiple ? prop : prop[0]);
      this.emitChange(this.selectData);
      this.lastSelectData = deepCopy(this.selectData);
      this.hide();
    },
    // delete
    useDelete(prop) {
      this.selectData.splice(prop, 1);
      this.useUpdate(this.selectData);
      this.emitChange(this.selectData);
      this.lastSelectData = deepCopy(this.selectData);
    },
    // update
    useUpdate(prop) {
      const { source, multiple, valueKey, dataMapping } = this.$props;
      // update data mapping
      if (multiple) {
        const vModel = prop.map((item) => item[valueKey]);
        this.$emit("input", vModel);
      } else {
        const vModel = prop[valueKey];
        this.$emit("input", vModel);
        for (let key in dataMapping) {
          source[key] = prop[dataMapping[key]];
        }
        this.$emit("update:source", source);
      }
    },
    // row click
    onceClick(prop) {
      const { multiple } = this.$props;
      // 单选
      if (!multiple) this.$refs.multipleTable.clearSelection();
      [prop].forEach((row) => this.$refs.multipleTable.toggleRowSelection(row));
    },
    // row double click
    doubleClick(prop) {
      const { multiple } = this.$props;
      if (!multiple) this.useConfirm([prop]);
    },
    // selection change
    selectionChange(prop) {
      if (prop && prop.length) {
        this.selectData = prop;
      }
    },
    handleClear() {
      if (!this.$props.multiple) {
        this.innerValue = "";
      }
    },
  },
  created() {

  },
  mounted() {},
  destroyed() {},
};
</script>
<template>
  <div class="popover-select">
    <el-input
      v-model="innerValue"
      :size="size"
      :disabled="disabled"
      :readonly="readonly"
      :clearable="clearable"
      :placeholder="placeholder"
      @clear="handleClear"
    >
      <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
    >
      <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="useQuery"
            @keydown.enter="useQuery"
          >
          </el-input>
        </el-form-item>
        <el-form-item>
          <el-button icon="el-icon-refresh" @click="useReset"></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="onceClick"
          @row-dblclick="doubleClick"
          @selection-change="selectionChange"
        >
          <el-table-column
            v-if="multiple"
            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
          >
            <template slot-scope="scope">
              <dr-computed-input
                v-if="column.type === 'ComputedInput'"
                v-model="scope.row[column.key]"
                :source="scope.row"
                :computed="column.computed"
                :placeholder="column.placeholder"
                style="width: 100%"
              ></dr-computed-input>
              <span v-else> {{ scope.row[column.key] }}</span>
            </template>
          </el-table-column>
        </el-table>
        <pagination
          :total="page.total"
          :page.sync="page.pageNum"
          :limit.sync="page.pageSize"
          @pagination="useQuery"
        />
      </el-form>
      <div style="margin-top: 20px; text-align: right">
        <el-button :size="size" @click="useCancel(lastSelectData)">
          取 消
        </el-button>
        <el-button :size="size" @click="useConfirm(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 && lastSelectData.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">
            + {{ lastSelectData.length }}
          </el-tag>
          <el-tag
            v-for="(tag, index) in lastSelectData"
            :size="size"
            hit
            closable
            :style="{
              display: 'flex',
              justifyContent: 'space-between',
              alignItems: 'center',
              margin: lastSelectData.length - 1 === index ? '0' : '0 0 5px 0',
            }"
            @close="useDelete(index)"
          >
            {{ tag.name }}
          </el-tag>
        </el-popover>
      </div>
    </div>
  </div>
</template>
<style scoped></style>