<template>
	<view class="u-relative bg border-r-16">
		
		<view class="u-flex tabs zhanwei u-relative">
			<view class="active-block" :style="computedBlockStyle">
			</view>
			<view class="u-flex-1 u-text-center item"
			 :class="{active:index===current}"
			 @tap="changeCurrent(index)" v-for="(item,index) in props.list" :key="index">
				{{item}}
			</view>
			
		</view>
		<view class="u-flex tabs u-absolute position-all">
			
			<view class="u-flex-1 u-text-center item"
			 :class="{active:index===current}"
			 @tap="changeCurrent(index)" v-for="(item,index) in props.list" :key="index">
				{{item}}
			</view>
			
		</view>
	</view>
	
</template>

<script setup>
import { computed, ref, watch } from 'vue';
	const props=defineProps({
		padding:{type:String},
		list:{type:Array},
		defaultIndex:{
			type:Number,
			default:0
		},
		modelValue:{
			type:Number,
			default:0
		}
	})
	const emit=defineEmits(['change','update:modelValue'])
	let current=ref(props.modelValue||props.defaultIndex||0)
	function changeCurrent(index){
		current.value=index
		emit('update:modelValue',index)
	}
	const computedBlockStyle=computed(()=>{
		const oneWidth= 100/props.list.length
		const left= current.value*oneWidth
		return{
			width:oneWidth+'%',
			left:left+'%'
		}
	})
	watch(()=>current.value,()=>{
		emit('change',current.value)
	})
	
</script>

<style lang="scss" scoped>
	.zhanwei{
		.item{
			opacity: 0;
		}
	}
	.bg{
		background: #E6F0FF;
		padding: 4rpx 10rpx;
	}
	.border-r-16{
		border-radius: 16rpx;
	}
	.active-block{
		background-color: $my-main-color;
		color: #fff;
		top: 4rpx;
		bottom: 4rpx;
		left: 10rpx;
		position: absolute;
		border-radius: 8rpx;
		transition: all .2s ease-in-out;
		overflow: hidden;
		z-index: 1;
	}
	.tabs{
		border-radius: 16rpx;
		font-size: 28rpx;
		color: #318AFE;
		z-index: 2;
		.active-block{
			background-color: $my-main-color;
			color: #fff;
			top: 4rpx;
			bottom: 4rpx;
			left: 0;
			position: absolute;
			border-radius: 8rpx;
			transition: all .2s ease-in-out;
			overflow: hidden;
			z-index: 1;
		}
		.item{
			padding: 8rpx 0;
			transition: all .2s ease-in-out;
			position: relative;
			background-color: transparent;
			z-index: 2;
		}
		.item.active{
			border-radius: 8rpx;
			// background-color: $my-main-color;
			color: #fff;
		}
	}
</style>