<!--
@description: 封装组件
-->
<template>
  <div style="padding-left: 10px;">
    <el-row v-if="topLayout" style="margin-bottom: 20px">
      <el-col v-if="topLayoutLeft" :span="18">
        <div class="grid-content bg-purple">
          <el-input
            v-model="searchForm.search"
            :disabled="tableLoading"
            :size="$ELEMENT.size"
            :placeholder="filterPlaceholder"
            clearable
            style="width: 200px;"
            @keyup.enter.native="handleSearchFormSubmit"
          />
          <el-button
            :size="$ELEMENT.size"
            type="primary"
            title="过滤"
            @click="handleSearchFormSubmit"
          >
            <common-icon value="svg:icon-filter" />
          </el-button>
          <el-button
            v-show="isFilter"
            :size="$ELEMENT.size"
            type="info"
            title="取消过滤"
            style="margin-left: 0;"
            @click="handleCancelFilter"
          >
            <common-icon value="svg:icon-unfilter" />
          </el-button>
          <slot name="button" />
        </div>
      </el-col>
      <el-col v-if="topLayoutRight" :span="6">
        <div class="grid-content bg-purple-light" style="text-align: right">
          <slot name="tools" />
          <el-button
            :size="$ELEMENT.size"
            name="refresh"
            type="info"
            title="导出数据"
            @click="handleExportTableData"
          >
            <svg-icon icon-class="icon-excel" style="font-size: 1em" />
          </el-button>
          <el-popover
            placement="bottom"
            width="200"
            trigger="click"
          >
            <div style="width: 50px;">
              <el-checkbox-group v-model="showFields">
                <el-checkbox
                  v-for="(field, index) in fields"
                  :key="index"
                  :label="field"
                  :checked="field.show"
                  style="width: 100%"
                  @change="handleSelectField($event, field)"
                >{{ field.label }}</el-checkbox>
              </el-checkbox-group>
            </div>
            <el-button
              slot="reference"
              :size="$ELEMENT.size"
              name="refresh"
              type="info"
              icon="el-icon-s-fold"
              title="设置显示的字段"
            />
          </el-popover>
        </div>
      </el-col>
    </el-row>
    <el-table
      ref="table"
      v-loading="tableLoading"
      :data="filterData"
      :span-method="spanMethod"
      :max-height="maxHeight"
      :row-key="getRowKeys"
      :stripe="stripe"
      :fit="fit"
      :border="border"
      :empty-text="emptyText"
      :highlight-current-row="highlightCurrentRow"
      :show-overflow-tooltip="showOverflowTooltip"
      @cell-click="handleCellClick"
      @cell-dblclick="handleCellDbClick"
      @header-click="handleHeaderClick"
      @row-click="handleRowClick"
      @row-dblclick="handleRowDblClick"
      @selection-change="handleSelectionChange"
    >
      <el-table-column
        v-if="selection"
        :reserve-selection="true"
        type="selection"
        width="50"
      />
      <template v-for="field in fields">
        <el-table-column
          v-if="field.show"
          :key="field.prop"
          :prop="field.prop"
          :label="field.label"
          :sortable="field.sortable"
          :width="field.width || ''"
          show-overflow-tooltip
        >
          <template slot-scope="scope">
            <slot :name="field.prop" :values="scope.row" :prop="field.prop" :field="field">
              <span v-html="formatColumnData(scope.row, field)" />
            </slot>
          </template>
        </el-table-column>
      </template>
      <slot name="column" />
    </el-table>
    <el-row>
      <el-col :span="6" style="margin-top: 20px">
        <span>已选择:<span style="color: #ff00ff;font-weight: bold;">{{ multipleSelection.length }}</span>条</span>
        <el-button
          v-show="multipleSelection.length"
          type="info"
          size="mini"
          title="清空多选"
          @click="clearMultipleSelection"
        >清空</el-button>
      </el-col>
      <el-col :span="18" style="margin-top: 20px; text-align: right">
        <span>总计:<span style="color: #ff00ff;font-weight: bold;">{{ filterData.length }}</span>条</span>
      </el-col>
    </el-row>
  </div>
</template>
<script>
import moment from "moment";
import * as Utils from "@/utils";
export default {
  name: "CommonStaticTable",
  props: {
    value: {
      type: Array,
      default: () => []
    },
    spanMethod: {
      type: Function,
      default: null
    },
    data: {
      type: Array,
      default: () => []
    },
    initSelected: {
      type: Array,
      default: () => []
    },
    // eslint-disable-next-line vue/require-prop-types
    maxHeight: {
      default: 700
    },
    stripe: {
      type: Boolean,
      default: true
    },
    fit: {
      type: Boolean,
      default: true
    },
    highlightCurrentRow: {
      type: Boolean,
      default: true
    },
    showOverflowTooltip: {
      type: Boolean,
      default: true
    },
    border: {
      type: Boolean,
      default: false
    },
    emptyText: {
      type: String,
      default: "暂无数据"
    },
    topLayout: {
      type: Array,
      default: () => {
        return ["left", "right"];
      }
    },
    bottomLayout: {
      type: Array,
      default: () => {
        return ["left", "right"];
      }
    },
    fields: {
      // 后端返回的字段
      type: Array,
      default: () => {
        return [];
      }
    },
    selection: {
      // 开始开启多选(默认不开启, false)
      type: Boolean,
      default: false
    },
    // api 对象
    api: {
      type: Function,
      default: null
    },
    params: {
      type: Object,
      default: () => {
        return {};
      }
    }
  },
  data() {
    return {
      tableEditable: true,
      showFields: [], // 显示的字段
      filterFields: [], // 过滤的字段
      filterPlaceholder: "过滤", // 过滤提示文字
      buttonTagList: [], // 所有按钮标签
      excelDialogVisible: false,
      tableLoading: false,
      advancedSearchForm: {},
      advancedSearchFields: [],
      rowKey: null,
      multipleSelection: [],
      excelHeader: [],
      excelData: [],
      searchForm: {
        search: ""
      },
      getRowKeys: row => {
        if (this.rowKey) {
          return row[this.rowKey];
        }
        return row.id || row.uuid;
      },
      exportFields: [],
      tableData: [],
      filterData: [],
      isFilter: false
    };
  },
  computed: {
    topLayoutLeft() {
      return this.topLayout.indexOf("left") >= 0;
    },
    topLayoutRight() {
      return this.topLayout.indexOf("right") >= 0;
    }
  },
  watch: {
    data: {
      handler: function(newData, oldData) {
        this.handleChangeTableData(newData);
      },
      immediate: true
    }
  },
  mounted() {
  },
  created() {
    this.initComponentData();
    this.initData();
    this.initSelect();
  },
  methods: {
    initData() {
      if (Utils.isFunction(this.api)) {
        this.listInterfaceData();
      }
    },
    initSelect() {
      for (const row of this.initSelected) {
        this.$refs["table"].toggleRowSelection(row, true);
      }
    },
    initComponentData() {
      this.fields.forEach(field => {
        field.show = (!!field.show);
        field.type = (field.type || "string").toLocaleLowerCase();
        field.label = field.label || field.prop;
        field.search = (!!field.search);
        field.sortable = (!!field.sortable);
        field.unique = (!!field.unique);
        field.width = field.width || "";
        if (field.type === "choices") {
          if (Utils.isArray(field.choices) && field.choices.length > 0) {
            if (!Utils.isObj(field.choices[0])) {
              field.choices = field.choices.map(value => {
                return {
                  label: value,
                  value: value
                };
              });
            }
          }
        }
        field.unique = (!!field.unique);
        if (field.unique) {
          this.rowKey = field.prop;
        }
      });
      this.filterFields = this.fields.filter(field => field.search).map(field => field.prop);
      if (this.filterFields.length) {
        const text = this.fields.filter(field => field.search).map(field => field.label).join("、");
        this.filterPlaceholder = `${text} 过滤`;
      }
    },
    listInterfaceData() {
      this.tableLoading = true;
      this.api(this.params).then(response => {
        this.tableLoading = false;
        this.handleChangeTableData(response.data);
      }).catch(() => {
        this.tableLoading = false;
      });
    },
    formatColumnData(row, field) {
      const type = field.type || "string";
      const prop = field.prop;
      if (field.formatter && typeof field.formatter === "function") {
        return field.formatter(row, prop, type);
      }
      if (type === "string") {
        return row[prop];
      } else if (type === "datetime") {
        return this.formatDatetime(row[prop]);
      } else if (type === "date") {
        return this.formatDate(row[prop]);
      } else if (type === "time") {
        return this.formatTime(row[prop]);
      } else if (type.startsWith("bool")) {
        return row[prop] ? "是" : "否";
      } else if (type === "choices") {
        const choices = field.choices;
        return this.formatChoices(choices, row[prop]);
      } else {
        return row[prop];
      }
    },
    formatChoices(choices, value) {
      for (const choice of choices) {
        if (choice.value === value) {
          return choice.label;
        }
      }
      return value;
    },
    formatDatetime(datetime) {
      return moment(datetime).format("YYYY-MM-DD HH:mm:ss");
    },
    formatDate(date) {
      return moment(date).format("YYYY-MM-DD");
    },
    formatTime(time) {
      return moment(time).format("HH:mm:ss");
    },
    getMultipleSelection() {
      return this.multipleSelection || [];
    },
    clearMultipleSelection() {
      this.$refs.table.clearSelection();
    },
    clearSelection() {
      this.$refs.table.clearSelection();
    },
    clearFilter() {
      // 重置过滤
      this.searchForm.search = "";
      this.filterData = Array.from(this.tableData);
    },
    handleSelectField(e, field) {
      field.show = e;
    },
    handleChangeTableData(data) {
      this.tableData = Array.from(data);
      this.filterData = Array.from(this.filterHandler(this.tableData));
    },
    // 导出表格的数据, 当前数据、当前列
    handleExportTableData() {
      this.excelDialogVisible = true;
      this.exportFields = this.fields.map(field => {
        return { prop: field.prop, label: field.label, show: field.show };
      });
      this.excelHeader = this.showFields.map(field => field["prop"]);
    },
    // 处理修改多选的值
    handleSelectionChange(val) {
      this.$emit("selection-change", val);
      this.multipleSelection = val;
    },
    handleSortChange(val) {
      this.sort.prop = val.prop;
      this.sort.order = val.order;
      this.getTableData();
    },
    filterHandler(data) {
      if (!data) {
        data = this.tableData || [];
      }
      const search = this.searchForm.search.trim();
      if (!search.length || !this.filterFields.length) {
        this.isFilter = false;
        return data;
      }
      const filterData = data.filter(row => {
        for (const field of this.filterFields) {
          if (row[field] && row[field].indexOf(search) >= 0) {
            return true;
          }
        }
        return false;
      });
      this.isFilter = true;
      return filterData;
    },
    handleCellClick(row, column, cell, event) {
      this.$emit("cell-click", row, column, cell, event);
    },
    handleCellDbClick(row, column, cell, event) {
      this.$emit("cell-dblclick", row, column, cell, event);
    },
    handleRowClick(row, column, event) {
      this.$emit("row-click", row, column, event);
    },
    handleRowDblClick(row, column, event) {
      this.$emit("row-dblclick", row, column, event);
    },
    handleHeaderClick(column, event) {
      this.$emit("header-click", column, event);
    },
    toggleRowSelection(row, selected = true) {
      this.$refs.table.toggleRowSelection(row, selected);
    },
    toggleFilter() {
      // 触发过滤
      this.filterData = Array.from(this.filterHandler());
    },
    handleSearchFormSubmit() {
      this.toggleFilter();
    },
    handleCancelFilter() {
      this.isFilter = false;
      this.clearFilter();
    }
  }
};
</script>

<style scoped>
  .picker {
    width: 240px;
  }
  .el-pagination {
    padding: 5px;
  }
  .right_pagination {
    text-align: right;
    padding-top: 20px;
  }
</style>
