<template>

  	<section>

    	<header class="top_tips">

    		<span class="num_tip" v-if="fatherComponent == 'home'">{{level}}</span>

    		<span class="num_tip" v-if="fatherComponent == 'item'">题目{{itemNum}}</span>

    	</header>

    	<div v-if="fatherComponent == 'home'" >

    		<div class="home_logo item_container_style"></div>

    		<router-link to="item" class="start button_style" ></router-link>

    	</div>

    	<div v-if="fatherComponent == 'item'" >

    		<div class="item_back item_container_style">

    			<div class="item_list_container" v-if="itemDetail.length > 0">

    				<header class="item_title">{{itemDetail[itemNum-1].topic_name}}</header>

    				<ul>

    					<li  v-for="(item, index) in itemDetail[itemNum-1].topic_answer" @click="choosed(index, item.topic_answer_id)" class="item_list">

    						<span class="option_style" v-bind:class="{'has_choosed':choosedNum==index}">{{chooseType(index)}}</span>

    						<span class="option_detail">{{item.answer_name}}</span>

    					</li>

    				</ul>

    			</div>

    		</div>

    		<span class="next_item button_style" @click="nextItem" v-if="itemNum < itemDetail.length"></span>

    		<span class="submit_item button_style" v-else @click="submitAnswer"></span>

    	</div>

  	</section>

</template>

<script>

import { mapState, mapActions } from 'vuex'

export default {

	name: 'itemcontainer',

	data() {

		return {

			itemId: null, //题目ID

			choosedNum: null, //选中答案索引

			choosedId:null //选中答案id

		}

	},

  	props:['fatherComponent'],

  	computed: mapState([

	  	'itemNum', //第几题

  		'level', //第几周

  		'itemDetail', //题目详情

  		'timer', //计时器

	]),

  	methods: {

  		...mapActions([

  			'addNum', 'initializeData',

  		]),

  		//点击下一题

  		nextItem(){

  			if (this.choosedNum !== null) {

	  			this.choosedNum = null;

	  			//保存答案, 题目索引加一，跳到下一题

	  			this.addNum(this.choosedId)

  			}else{

  				alert('您还没有选择答案哦')

  			}

  		},

  		//索引0-3对应答案A-B

	  	chooseType: type => {

	  		switch(type){

	  			case 0: return 'A';

	  			case 1: return 'B';

	  			case 2: return 'C';

	  			case 3: return 'D';

	  		}

	  	},

	  	//选中的答案信息

	  	choosed(type,id){

	  		this.choosedNum = type;

	  		this.choosedId = id;

	  	},

	  	//到达最后一题，交卷，请空定时器，跳转分数页面

	  	submitAnswer(){

	  		if (this.choosedNum !== null) {

	  			this.addNum(this.choosedId)

	  			clearInterval(this.timer)

	  			this.$router.push('score')

  			}else{

  				alert('您还没有选择答案哦')

  			}

	  	},

	},

	created(){

		//初始化信息

		if(this.fatherComponent == 'home') {

			this.initializeData();

			document.body.style.backgroundImage = 'url(./static/img/1-1.jpg)';

		}

	}

}

</script>

<style lang="less">

	.top_tips{

		position: absolute;

		height: 7.35rem;

		width: 3.25rem;

		top: -1.3rem;

		right: 1.6rem;

		background: url(../images/WechatIMG2.png) no-repeat;

		background-size: 100% 100%;

		z-index: 10;

		.num_tip{

			position: absolute;

			left: 0.48rem;

			bottom: 1.1rem;

			height: 0.7rem;

			width: 2.5rem;

			font-size: 0.6rem;

			font-family: '黑体';

			font-weight: 600;

			color: #a57c50;

			text-align: center;

		}

	}

	.item_container_style{

		height: 11.625rem;

		width: 13.15rem;

		background-repeat: no-repeat;

		position: absolute;

		top: 4.1rem;

		left: 1rem;

	}

	.home_logo{

		background-image: url(../images/1-2.png);

		background-size: 13.142rem 100%;

		background-position: right center;

	}

	.item_back{

		background-image: url(../images/2-1.png);

		background-size: 100% 100%;

	}

	.button_style{

        display: block;

        height: 2.1rem;

        width: 4.35rem;

        background-size: 100% 100%;

        position: absolute;

        top: 16.5rem;

        left: 50%;

        margin-left: -2.4rem;

        background-repeat: no-repeat;

	}

	.start{

        background-image: url(../images/1-4.png);

    }

    .next_item{

    	background-image: url(../images/2-2.png);

    }

    .submit_item{

    	background-image: url(../images/3-1.png);

    }

    .item_list_container{

    	position: absolute;

    	height: 7.0rem;

    	width: 8.0rem;

    	top: 2.4rem;

    	left: 3rem;

		-webkit-font-smoothing: antialiased;

    }

	.item_title{

		font-size: 0.65rem;

		color: #00e;

		line-height: 0.7rem;

	}

	.item_list{

		font-size: 0;

		margin-top: 0.4rem;

		width: 10rem;

		span{

			display: inline-block;

			font-size: 0.6rem;

			color: #00e;

			vertical-align: middle;

		}

		.option_style{

			height: 0.725rem;

			width: 0.725rem;

			border: 1px solid #fff;

			border-radius: 50%;

			line-height: 0.725rem;

			text-align: center;

			margin-right: 0.3rem;

			font-size: 0.5rem;

			font-family: 'Arial';

		}

		.has_choosed{

			background-color: #ffd400;

			color: #575757;

			border-color: #ffd400;

		}

		.option_detail{

			width: 7.5rem;

			padding-top: 0.11rem;

		}

	}

</style>