<template>
	<view>
		<view class="search-box">
			<uni-search-bar @input="input" :radius="100" cancelButton="none" :focus="true"></uni-search-bar>
			<button  class="search" @click="goToSearchList">搜索</button>
		</view>
		<!--搜索建议-->
		<view class="sugest-list" v-if="searchresult.length !== 0">
			<view class="sugest-item" v-for="(item,i) in searchresult" :key="i" @click="gotodetail(item)">
				<view class="dish-name">{{item.dish_name}}</view>
				<uni-icons type="arrowright" size="16"></uni-icons>
			</view>
		</view>
		<!--搜索历史-->
		<view class="history-box" v-else>
			<!--标题区域-->
			<view class="history-title">
				<text>搜索历史</text>
				<uni-icons type="trash" size="17" @click="clean"></uni-icons>
			</view>
			<!--列表区域-->
			<view class="history-list">
				<uni-tag  v-for="(item,i) in histories" :text="item" :key="i" @click="gotosearchdetail(item)"></uni-tag>
			</view>
		</view>
	</view>
</template>

<script>
	export default {
		data() {
			return {
				timer: null,
				kw: '',
				searchresult: [],
				//搜索结果
				searchlist: [],
				//搜索历史的数组
				historylist: [],
			};
		},
		onLoad() {
			this.historylist = JSON.parse(uni.getStorageSync('kw') || '[]')
			this.cnt = this.historylist.length
			console.log(this.historylist)
		},
		methods: {
			async goToSearchList() {
				this.getsearchresult()
				this.savesearchhistory()
				let that = this
				setTimeout(()=>{
					uni.$emit('item',this.searchresult)
				},500)
				uni.navigateTo({
					url:'/subpkg/searchList/searchList?searchlist=' + encodeURIComponent(JSON.stringify(this.searchresult))
				})
			},
			//input输入事件的处理函数
			input(e) {
				//延时器
				clearTimeout(this.timer)
				this.timer = setTimeout(
					() => {
						this.kw = e
						this.getsearchresult()
					}, 500)
			},
			async getsearchresult() {
				let that = this
				//判断搜索关键词是否为空
				if (this.kw.length === 0) {
					this.searchresult = []
					return
				}
				uniCloud.callFunction({
					name:'getDishes',
					data:{
						api:'getByName',
						dish_name:that.kw
					},
					success:function(res){
						that.searchresult = res.result.data
						that.searchlist = res.result.data
					}
				})
			},
			gotodetail(item) {
				this.savesearchhistory()
				console.log(item._id)
				uni.navigateTo({
					url: '/subpkg/dishDetail/dishDetail?_id=' +encodeURIComponent(JSON.stringify(item._id))
				})
			},
			savesearchhistory() {
				const set = new Set(this.historylist)
				set.delete(this.kw)
				set.add(this.kw)
				this.historylist = Array.from(set)
				uni.setStorageSync('kw', JSON.stringify(this.historylist))
			},
			//清空本地历史记录
			clean() {
				this.historylist = []
				uni.setStorageSync('kw', '[]')
				this.cnt = 0
			},
			gotosearchdetail(item) {
				let historyresult = []
				uniCloud.callFunction({
					name:'getDishes',
					data:{
						api:'getByName',
						dish_name:item
					},
					success:function(res){
						historyresult = res.result.data
					}
				})
				setTimeout(()=>{
					uni.$emit('item',historyresult)
				},500)
				uni.navigateTo({
					url:'/subpkg/searchList/searchList?searchlist=' + encodeURIComponent(JSON.stringify(historyresult))
				})
				
			}
		},
		computed: {
			histories() {
				return [...this.historylist].reverse()

			}
		}
	}
</script>

<style lang="scss">
	.search-box {
		position: sticky;
		top: 0;
		z-index: 999;
	}

	.sugest-list {
		padding: 0 5px;

		.sugest-item {
			display: flex;
			align-items: center;
			justify-content: space-between;
			font-size: 12px;
			padding: 13px 0;
			border-bottom: 1 px solid #efefef;

			.dish-name {
				white-space: nowrap;
				overflow: hidden;
				text-overflow: ellipsis;
			}
		}
	}

	.history-box {
		padding: 0 5px;

		.history-title {
			display: flex;
			justify-content: space-between;
			height: 40px;
			align-items: center;
			font-size: 13px;
			border-bottom: 1px solid #efefef;
		}

		.history-list {
			display: flex;
			flex-wrap: wrap;

			.uni-tag {
				margin-top: 5px;
				margin-right: 5px;
			}
		}
	}
	.search{
		height: 50rpx;
		width: 200rpx;
		font-size: 20rpx;
		justify-content: center;
	}
</style>