<template>
  <div class="action-columns" ref="root">
    <a-popover v-model="visible" placement="bottomRight" trigger="click" :get-popup-container="() => $refs.root">
      <div slot="title">
        <a-checkbox :indeterminate="indeterminate" :checked="checkAll" @change="onCheckAllChange" class="check-all" />列展示
        <a-button @click="resetColumns" style="float: right" type="link" size="small">重置</a-button>
      </div>
      <a-list style="width: 100%" size="small" :key="i" v-for="(col, i) in columns" slot="content">
        <a-list-item>
          <a-checkbox v-model="col.visible" @change="e => onCheckChange(e, col)"/>
          <template v-if="col.title">
            {{ col.title }}:
          </template>
          <slot v-else-if="col.slots && col.slots.title" :name="col.slots.title"></slot>
        </a-list-item>
      </a-list>
      <a-icon class="action" type="setting" />
    </a-popover>
  </div>
</template>
<script>
  import cloneDeep from 'lodash.clonedeep'
  export default {
    name: 'ActionColumns',
    props: ['columns', 'visibleColumns'],
    data () {
      return {
        visible: false,
        indeterminate: false,
        checkAll: true,
        checkedCounts: this.columns.length,
        backColumns: cloneDeep(this.columns)
      }
    },
    watch: {
      checkedCounts (val) {
        this.checkAll = val === this.columns.length
        this.indeterminate = val > 0 && val < this.columns.length
      },
      columns (newVal, oldVal) {
        if (newVal !== oldVal) {
          this.checkedCounts = newVal.length
          this.formatColumns(newVal)
        }
      }
    },
    created () {
      this.formatColumns(this.columns)
    },
    methods: {
      onCheckChange (e, col) {
        if (!col.visible) {
          this.checkedCounts -= 1
        } else {
          this.checkedCounts += 1
        }
      },
      fixColumn (fixed, col) {
        if (fixed !== col.fixed) {
          this.$set(col, 'fixed', fixed)
        } else {
          this.$set(col, 'fixed', undefined)
        }
      },
      setSearch (col) {
        this.$set(col, 'searchAble', !col.searchAble)
        if (!col.searchAble && col.search) {
          this.resetSearch(col)
        }
      },
      resetSearch (col) {
        // col.search.value = col.dataType === 'boolean' ? false : undefined
        col.search.value = undefined
        col.search.backup = undefined
      },
      resetColumns () {
        const { columns, backColumns } = this
        let counts = columns.length
        backColumns.forEach((back, index) => {
          const column = columns[index]
          column.visible = back.visible === undefined || back.visible
          if (!column.visible) {
            counts -= 1
          }
          if (back.fixed !== undefined) {
            column.fixed = back.fixed
          } else {
            this.$set(column, 'fixed', undefined)
          }
          this.$set(column, 'searchAble', back.searchAble)
          // column.searchAble = back.searchAble
          this.resetSearch(column)
        })
        this.checkedCounts = counts
        this.visible = false
        this.$emit('reset', this.getConditions(columns))
      },
      onCheckAllChange (e) {
        if (e.target.checked) {
          this.checkedCounts = this.columns.length
          // this.columns.forEach(col => col.visible = true)
          this.columns.forEach(function (col, index) {
                    col.visible = true
          })
        } else {
          this.checkedCounts = 0
         // this.columns.forEach(col => col.visible = false)
           this.columns.forEach(function (col, index) {
                     col.visible = false
           })
        }
      },
      getConditions (columns) {
        const conditions = {}
        columns.filter(item => item.search.value !== undefined && item.search.value !== '' && item.search.value !== null)
          .forEach(col => {
            conditions[col.dataIndex] = col.search.value
          })
        return conditions
      },
      formatColumns (columns) {
        for (const col of columns) {
          if (col.visible === undefined) {
            this.$set(col, 'visible', true)
          }
          if (!col.visible) {
            this.checkedCounts -= 1
          }
        }
      }
    }
  }
</script>

<style scoped lang="less">
.action-columns{
  display: inline-block;
  .check-all{
    margin-right: 8px;
  }
  .left,.right{
    transform: rotate(-90deg);
  }
  .active{
  }
}
</style>
