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

<script>
import { scrollTo } from "@/utils/scroll-to";
import { defineComponent, computed, } from "vue";

export default defineComponent({
	name: "Pagination",
	props: {
		total: {
			required: true,
			type: Number,
		},
		page: {
			type: Number,
			default: 1,
		},
		limit: {
			type: Number,
			default: 20,
		},
		pageSizes: {
			type: Array,
			default() {
				return [5, 10, 20, 30, 50, 100, 500];
			},
		},
		layout: {
			type: String,
			default: "total, sizes, prev, pager, next, jumper",
		},
		background: {
			type: Boolean,
			default: true,
		},
		autoScroll: {
			type: Boolean,
			default: true,
		},
		hidden: {
			type: Boolean,
			default: false,
		},
	},
	setup(props, context) {
		const currentPage = computed({
			get() {
				return props.page;
			},
			set(val) {
				context.emit("update:page", val);
			},
		});
		const pageSize = computed({
			get() {
				return props.limit;
			},
			set(val) {
				context.emit("update:limit", val);
			},
		});
		const handleSizeChange = (val) => {
			if (currentPage.value * val > props.total) {
				currentPage.value = 1;
			}
			context.emit("pagination", { page: currentPage.value, limit: val });
			if (props.autoScroll) {
				scrollTo(0, 800);
			}
		};
		const handleCurrentChange = (val) => {
			context.emit("pagination", { page: val, limit: pageSize.value });
			if (props.autoScroll) {
				scrollTo(0, 800);
			}
		};

		return {
			currentPage,
			pageSize,
			handleSizeChange,
			handleCurrentChange,
		};
	},
});
</script>

<style scoped>
.pagination-container {
	background: #fff;
	padding: 32px 16px;
}
.pagination-container.hidden {
	display: none;
}
</style>
