<template>
  <div :class="{hidden: hidden}" class="pagination-container">
    <el-pagination
      :class="{hidden: hidden}"
      :background="background"
      :current-page.sync="currentPage"
      :page-size.sync="pageSize"
      :layout="layout"
      :page-sizes="pageSizes"
      :total="total"
      v-bind="$attrs"
      @size-change="handleSizeChange"
      @current-change="handleCurrentChange"
    />
  </div>
</template>

<script lang="ts">
import { Component, Prop, Vue } from 'vue-property-decorator'
import { scrollTo } from '@/utils/scroll-to'

@Component({
  name: 'Pagination'
})
export default class extends Vue {
  @Prop({ required: true }) private total!: number;
  @Prop({ default: 1 }) private page!: number;
  @Prop({ default: 20 }) private limit!: number;
  @Prop({ default: () => [10, 20, 30, 50] }) private pageSizes!: number[];
  @Prop({ default: 'total, sizes, prev, pager, next, jumper' })
  private layout!: string;

  @Prop({ default: false }) private background!: boolean;
  @Prop({ default: true }) private autoScroll!: boolean;
  @Prop({ default: false }) private hidden!: boolean;

  get currentPage() {
    return this.page
  }

  set currentPage(value) {
    this.$emit('update:page', value)
  }

  get pageSize() {
    return this.limit
  }

  set pageSize(value) {
    this.$emit('update:limit', value)
  }

  handleSizeChange(value: number) {
    this.$emit('pagination', { page: this.currentPage, limit: value })
    if (this.autoScroll) {
      scrollTo(0, 800)
    }
  }

  handleCurrentChange(value: number) {
    this.$emit('pagination', { page: value, limit: this.pageSize })
    if (this.autoScroll) {
      scrollTo(0, 800)
    }
  }
}
</script>

<style lang="scss" scoped>
.pagination-container {
  margin: 16px 0;
  text-align: right;
}

.pagination-container.hidden {
  display: none;
}
</style>
