<template>
	<view class="pages">
		<!-- head -->
		<sklineHeader title="购物车"></sklineHeader>
		<view class="cart-body">
				<!-- 内容 -->
				<scroll-view 
				scroll-y 
				class="cart-list" 
				type="custom" 
				:bounces="false"
				@scrolltolower="onreachBottom">
					<sticky-header>
						 <!-- 头部 -->
						 <view class="cart-head" v-if="total>0">
						 	<view class="cart-head-left">共<text>{{total}}</text>款商品</view>
						 	<view class="cart-head-right">
								<view class="cart-head-btton blue" @click="editAll">
									<text>{{editFlag?'完成':'编辑'}}</text>
								</view>
							</view>
						 </view>
					</sticky-header>
					<productItem
					v-for="(item, index) in list"
					:key="index"  
					:list="item" 
					@changeQty="changeQty" 
					@check="chooseItem"
					@editQty="editQty"
					@remove="removeCart">
					</productItem>
					<!-- loading -->
					<view class="loading-bar" v-if="total>0 && status!='loading'">{{noDataText}}</view>
					<view class="empty-bar" v-if="total==0 && status!='loading'" @click="goBack">
						<image mode="aspectFit" :src="empty.imgUrl"></image>
						<view>{{empty.tip}}</view>
					</view>
				</scroll-view>
				<!-- 底部 -->
				<view class="cart-footer" v-if="total>0">
					<view class="cart-footer-box">
						<view class="cart-footer-left">
								<view class="cart-footer-left-all" @click="chooseAll">
									<view class="cart-footer-left-all-icon">
										<uni-icons v-if="allDisabled&&!editFlag" type="circle-filled" size="24" color="#ccc"></uni-icons>
										<uni-icons v-else :type="allChecked?'checkbox-filled':'circle'" size="24" :color="allChecked?'#dd0000':'#666'"></uni-icons>
									</view>
									<view class="cart-footer-left-all-text">
										<text>全选</text>
									</view>
								</view>
						</view>
						<view class="cart-footer-right">
							<view class="cart-footer-left-price" v-if="!editFlag && totalAmount">
								<view class="flex align_center">
									<view class="cart-footer-left-price-text">
										<text>合计：</text>
									</view>
									<view class="cart-footer-left-price-num">
										￥<text>{{Number(totalAmount).toFixed(2).toString().split('.')[0]}}</text>.{{Number(totalAmount).toFixed(2).toString().split('.')[1]}}
									</view>
								</view>
								<view class="flex align_center" v-if="totalDiscount||totalCoupon">
									<view class="cart-footer-left-price-text1">
										<text v-if="totalDiscount">优惠：￥{{Number(totalDiscount).toFixed(2)}}</text>
										<text v-if="totalCoupon">代金券：￥{{Number(totalCoupon).toFixed(2)}}</text>
									</view>
								</view>
							</view>
							<view v-else></view>
							<view class="cart-footer-right-button">
								<button class="btns" :loading="loading" v-if="!editFlag" type="warn" size="mini" @click="settlement">去结算({{totalNum}})</button>
								<button v-else class="btns" type="warn" plain size="mini" @click="batchRemove">删除({{totalSel}})</button>
							</view>
						</view>
					</view>
					<view :style="{height:safeAreaBottom+'px'}"></view>
				</view>
		</view>
		<!-- 修改数量弹框 -->
		<uni-popup ref="showPopu" type="center" :maskClick="false">
			<view class="popu-content">
				<view class="popu-close" @click="closePopu">
					<uni-icons size="26" type="closeempty"></uni-icons>
				</view>
				<view class="popu-content-title flex align_center justify_center"><text>修改商品数量</text></view>
				<view class="popu-content-num flex align_center justify_center">
					<uni-number-box v-model="curEditRow.qty" :size="28" :input-width="280" :input-height="70" :min="1" :max="999"></uni-number-box>
				</view>
				<view class="popu-content-btn">
					<view class="popu-content-btn-item cancelBtn" @click="closePopu">取消</view>
					<view class="popu-content-btn-item okbtn" @click="changeSingQty">确定</view>
				</view>
			</view>
		</uni-popup>
	</view>
</template>

<script>
	import {
	    mapState,
	    mapMutations,
	} from 'vuex'
	import productItem from '@/pagesB/cart/productitem.vue'
	import sklineHeader from '../../components/skline/sklineHeader.vue'
	import { getCartList, updateCart, deleteCart } from '@/api/cart.js'
	export default {
		components:{
			productItem,
			sklineHeader
		},
		onLoad() {
			// 计算区域高度
			this.statusBarHeight = uni.getSystemInfoSync().statusBarHeight
			this.screenWidth = uni.getSystemInfoSync().windowWidth
			this.screenHeight = uni.getSystemInfoSync().windowHeight
			this.safeAreaBottom = uni.getSystemInfoSync().safeAreaInsets.bottom
			// 获取列表数据
			this.pageInit()
			
			// 刷新列表
			uni.$on('refashCartList',()=>{
				this.pageInit()
			})
			// 删除商品
			uni.$on('removeCatGood',(snList,a,b)=>{
				this.removeCart(snList,a,b)
			})
		},
		onUnload() {
			uni.$off('refashCartList')
			uni.$off('removeCatGood')
		},
		data() {
			return {
				loading: false,
				status: 'loading',
				noDataText: '暂无产品',
				empty: {
					tip: '购物车空空的，去挑选商品吧',
					imgUrl: '/static/kongCart.png'
				},
				// 查询条件
				pageNo: 1, // 页数
				pageSize: 10000, // 每页数
				list: [], // 列表数据
				total: 0, // 总款数
				totalAmount: 0, // 总金额
				totalDiscount:0, // 总优惠
				totalCoupon: 0, // 总代金券
				totalNum: 0, // 总数量
				totalSel: 0, // 已选数量
				editFlag: false, // 是否编辑状态
				allChecked: false, // 是否全选
				screenWidth: 325, // 屏幕宽度
				screenHeight: 0, // 屏幕高度
				statusBarHeight: 44, // 状态栏高度
				safeAreaBottom: 0, // 底部安全区域高度
				curEditRow: null
			}
		},
		computed: {
			...mapState(['hasLogin']),
			userInfo(){
				return this.$store.state.vuex_userInfo
			},
			allDisabled(){
				let ret = false
				if(!this.editFlag){
					this.list.forEach(key => {
						ret = key.every(item => !item.status || item.status==0 || item.dealerScopeFlag==0)
					})
				}
				return ret
			}
		},
		methods: {
			goBack(){
				uni.navigateBack()
			},
			pageInit(){
				this.allChecked = false
				this.pageNo = 1
				this.list = []
				this.getRow()
			},
			// 关闭弹框
			closePopu(){
				this.$refs.showPopu.close()
				this.curEditRow = null
			},
			// 打开编辑数量弹框
			editQty(item){
				this.curEditRow = JSON.parse(JSON.stringify(item))
				this.$refs.showPopu.open()
			},
			// 确定修改
			changeSingQty(){
				this.changeQty(this.curEditRow.qty,this.curEditRow.cartSn)
			},
			// 查询列表
			getRow (pageNo) {
			  let _this = this
			  if (pageNo) {
			    this.pageNo = pageNo
			  }
			  let params = {
			    pageNo: this.pageNo,
			    pageSize: this.pageSize,
				queryWord: this.queryWord
			  }
			  this.status = "loading"
			  getCartList(params).then(res => {
				if (res.status == 200) {
				  _this.total = res.data.count || 0
				  const list = res.data.list
				  for(let i=0;i<list.length;i=i+10){
					  _this.list.push(list.slice(i,(i+10)>list.length?list.length:(i+10)).map(key=>{
						  const a = key.shopPromoProduct
						  key.orginPrice = key.price
						  if(a){
							  key.promoType = a.promoType
							  key.resultValue = a.resultValue
							  key.conditionValue = a.conditionValue
							  key.discountType = a.discountType
							  key.promoProductSn = a.promoProductSn
							  key.promoSn = a.promoSn
							  // 特价
							  if(key.promoType=='PROMO_PROD'){
								  key.price = key.conditionValue
							  }
						  }
						  key.priceStr = Number(key.price).toFixed(2).toString().split('.')
						  return {
								id: key.id,
								edit: false,
								checked: _this.allChecked,
								cartSn: key.cartSn,
								price: key.price,
								orginPrice: key.orginPrice,
								priceStr: key.priceStr,
								qty: key.qty,
								productSn: key.productSn,
								productName: key.productEntity.productName,
								productImage: key.productEntity.images,
								productCode: key.productEntity.code,
								productOrigCode: key.productEntity.origCode,
								unit: key.productEntity.unit,
								status: key.status,
								dealerScopeFlag: key.dealerScopeFlag,
								resultValue: key.resultValue,
								conditionValue: key.conditionValue,
								discountType: key.discountType,
								promoType: key.promoType,
								promoProductSn: key.promoProductSn,
								promoSn: key.promoSn,
								giftQty: 0,
								shopPromoProduct: key.shopPromoProduct,
								shopProductSubsidy: key.shopProductSubsidy
							}
					  }))
				  }
				  
				  // 默认全选
				  if(_this.pageNo == 1){
					  _this.chooseAll()
				  }
				  // 判断是否最后一页
				  const maxPages = Math.ceil(_this.total / _this.pageSize)
				  if(this.pageNo >= maxPages){
				  	_this.status = 'nomore'
				  	_this.noDataText = '没有更多了'
				  }else{
					  _this.status = 'loadmore'
					  _this.noDataText = '加载更多'
				  }
				} else {
				  _this.list = []
				  _this.total = 0
				  _this.status = 'loadmore'
				  _this.noDataText = res.message
				}
			  })
			},
			// scroll-view到底部加载更多
			onreachBottom() {
				// 判断是否最后一页
				const maxPages = Math.ceil(this.total / this.pageSize)
				if(this.pageNo >= maxPages){
					this.status = "nomore"
					this.noDataText = '没有更多了'
				}else{
					this.pageNo += 1
					this.getRow()
				}
			},
			// 根据cartSn查找
			getItemById(cartSn){
				const a = this.list.findIndex(k => k.find(s=> s.cartSn == cartSn))
				const b = a>=0 ? this.list[a].findIndex(s=> s.cartSn == cartSn) : -1
				return {p:a,s:b}
			},
			// 已选产品变更数量
			changeQty(val,cartSn){
				uni.showLoading({
					title: '加载中'
				})
				updateCart({
					cartSn: cartSn,
					qty: val
				}).then(res => {
					if(res.status == 200){
						const crow = this.getItemById(cartSn)
						if(crow.p>=0&&crow.s>=0){
							this.list[crow.p][crow.s].qty = val
							this.list[crow.p].splice()
							// 合计
							this.getChooseHeji()
							uni.$emit('refashCart')
						}
						this.closePopu()
					}else{
						uni.showToast({
							title: res.message,
							icon: 'none'
						})
					}
					uni.hideLoading()
				})
			},
			// 单选择
			chooseItem(cartSn){
				const crow = this.getItemById(cartSn)
				if(crow.p>=0&&crow.s>=0){
					this.list[crow.p][crow.s].checked = !this.list[crow.p][crow.s].checked
					// 合计
					this.getChooseHeji()
					// 判断是否全选
					this.isAllChecked()
				}
			},
			// 判断是否全选
			isAllChecked(){
				if(this.editFlag){
					this.allChecked = this.list.every(key => key.every(item => item.checked))
				}else{
					this.allChecked = this.list.every(key => key.filter(item => item.status==1&&item.dealerScopeFlag==1 ).every(item => item.checked))
				}
			},
			// 编辑
			editAll(){
				this.editFlag = !this.editFlag
				this.list.forEach(key => {
					key.forEach(item => {
						item.edit = this.editFlag
						if(!item.status||item.status==0||item.dealerScopeFlag==0){
							item.checked = false
						}
					})
				})
				// 合计
				this.getChooseHeji()
				// 判断是否全选
				this.isAllChecked()
			},
			// 全选
			chooseAll(){
				if(this.allDisabled){
					return
				}
				this.allChecked = !this.allChecked
				this.list.forEach(key => {
					// 非编辑模式
					if(!this.editFlag){
						key.filter(item=>item.status == 1 && item.dealerScopeFlag == 1).forEach(item => {
							item.checked = this.allChecked
						})
					}else{
						// 编辑模式
						key.forEach(item => {
							item.checked = this.allChecked
						})
					}
				})
				// 合计
				this.getChooseHeji()
			},
			//单个删除
			removeChoose(cartSn,isBatch){
				// 删除项
				const crow = this.getItemById(cartSn)
				if(crow.p>=0&&crow.s>=0){
					this.list[crow.p].splice(crow.s, 1);
					this.total = this.total - 1
					// 合计
					if(!isBatch){
						this.getChooseHeji()
						uni.$emit('refashCart')
						// 判断是否全选
						this.isAllChecked()
					}
				}
			},
			// 批量删除
			batchRemove(){
				if(this.totalNum==0){
					uni.showToast({
						title: '请选择产品',
						icon: 'none'
					})
					return false
				}
				const _this = this
				uni.showModal({
					title: '提示',
					content: '确定删除商品吗？',
					confirmText: '确定',
					success(res) {
						if(res.confirm){
							const snList = []
							 _this.list.forEach(item => {
							 	item.filter(k=>k.checked).forEach(s=>{
							 		snList.push(s.cartSn)
							 	})
							 })
							  
							 // 删除购物车
							 _this.removeCart(snList,true,true)
						}
					}
				})
			},
			// 删除商品
			removeCart(snList,isBatch,isTip){
				const _this = this
				if(isTip){
					uni.showLoading({
						title: '删除中'
					})
				}
				deleteCart({cartSns:snList}).then(ret => {
					 if(ret.status == 200){
						 snList.forEach(sn => {
							 _this.removeChoose(sn,isBatch)
						 })
						 // 合计,批量操作
						 if(isBatch){
							 _this.getChooseHeji()
							 uni.$emit('refashCart')
							 // 判断是否全选
							 _this.isAllChecked()
						 }
						 if(isTip){
							uni.showToast({
								 title: '删除成功',
								 icon: 'none'
							}) 
						 }
					 }
					 uni.hideLoading()
				})
			},
			// 去结算
			settlement(){
				if(this.totalAmount>0){
					 const list = []
					 this.list.forEach(key => {
					 	 const c = key.filter(item => item.checked)
						 list.push(c)
					 })
					 this.$store.state.vuex_tempData = list
					 uni.navigateTo({
					 	url: '/pagesB/procureOrder/creatOrder'
					 })
				}else{
					uni.showToast({
						title: '请选择产品',
						icon: 'none'
					})
				}
			},
			// 计算总款数、合计、数量
			getChooseHeji(){
				this.totalAmount = 0
				this.totalDiscount = 0
				this.totalCoupon = 0
				this.totalNum = 0
				this.totalSel = 0
				this.list.forEach(key => {
					// 已选择
					key.filter(item=>item.checked).forEach(item => {
						this.totalAmount += item.price * item.qty // 总金额
						this.totalNum += item.qty // 总数量
						this.totalSel += 1 // 已选数量
						// 如果是返券类型
						if(item.promoType=='BUY_PROD_GIVE_VALID'){
							this.totalCoupon += item.resultValue * item.qty
						}
						// 特价
						if(item.promoType=='PROMO_PROD'){
							this.totalDiscount += (item.orginPrice - item.conditionValue) * item.qty
						}
						// 满赠
						item.giftQty = item.promoType=='BUY_PROD_GIVE_PROD' ? Math.floor(item.qty / item.conditionValue)*item.resultValue : 0
					})
					// 未选择
					key.filter(item=>!item.checked).forEach(item => {
						// 满赠
						item.giftQty = item.promoType=='BUY_PROD_GIVE_PROD' ? Math.floor(item.qty / item.conditionValue)*item.resultValue : 0
					})
				})
			},
		}
	}
</script>

<style lang="less">
.pages{
	height: 100vh;
	display: flex;
	flex-direction: column;
	.popu-content{
		background-color: #FFFFFF;
		border-radius: 10px;
		width: 300px;
		display: flex;
		flex-direction: column;
		align-items: center;
		padding: 10px 15px;
		.popu-close{
			padding: 10px;
			position: absolute;
			right: 0;
			top: 0;
		}
		.popu-content-title{
			padding: 10px;
			font-size: 16px;
		}
		.popu-content-num{
			font-size: 14px;
			color: #999999;
			padding: 10px 0;
			> text{
				margin-right: 10px;
				font-size: 10px;
			}
		}
		.popu-content-btn{
			width: 100%;
			display: flex;
			align-items: center;
			justify-content: space-around;
			margin: 20px 0 10px;
			.popu-content-btn-item{
				width: 40%;
				height: 32px;
				font-size: 14px;
				display: flex;
				align-items: center;
				justify-content: center;
				border-radius: 100px;
			}
			.cancelBtn{
				background-color: #f8f8f8;
				color: #666;
			}
			.okbtn{
				background-color: #f70000;
				color: #FFFFFF;
			}
		}
	}
	.cart-body{
		position: relative;
		flex-grow: 1;
		display: flex;
		flex-direction: column;
		.cart-head{
			display: flex;
			justify-content: space-between;
			align-items: center;
			padding: 0 20rpx;
			background-color: #FFFFFF;
			height: 40px;
			.cart-head-left{
				display: flex;
				align-items: center;
				font-size: 28rpx;
				color: #333333;
				height: 100%;
				text{
					color: #d81e06;
					margin: 0 10rpx;
				}
			}
			.cart-head-right{
				display: flex;
				align-items: center;
			}
			.red{
				color: #d81e06;
			}
			.blue{
				color: #2196F3;
			}
			.cart-head-btton{
				height: 100%;
				font-size: 28rpx;
				margin-right: 10px;
			}
		}
		.cart-list{
			flex-grow: 1;
			background-color: #F5F5F5;
			width: 100%;
			.loading-bar{
				text-align: center;
				padding: 10px 0;
				color: #999999;
			}
			.empty-bar{
				display: flex;
				flex-direction: column;
				align-items: center;
				justify-content: center;
				padding: 20px 0;
				margin-top: 20vh;
				image{
					width: 100px;
					height: 100px;
				}
				view{
					font-size: 14px;
					color: #999999;
					margin-top: 10px;
				}
			}
		}
		.cart-footer{
			width: 100%;
			background-color: #FFFFFF;
			.cart-footer-box{
				width: 100%;
				height: 100rpx;
				display: flex;
				justify-content: space-between;
				align-items: center;
			}
			.cart-footer-left{
				display: flex;
				align-items: center;
				padding: 0 20rpx 0 36rpx;
				.cart-footer-left-all{
					display: flex;
					align-items: center;
					.cart-footer-left-all-text{
						margin-left: 10rpx;
						font-size: 28rpx;
						color: #333333;
					}
				}
			}
			.cart-footer-right{
				padding: 0 20rpx;
				display: flex;
				align-items: center;
				justify-content: space-between;
				flex-grow:1;
				.cart-footer-left-price{
					flex-grow:1;
					> view{
						display: flex;
						align-items: baseline;
						justify-content: flex-end;
					}
					.cart-footer-left-price-text{
						font-size: 24rpx;
						color: #333333;
					}
					.cart-footer-left-price-text1{
						font-size: 20rpx;
						color: #666;
						display: flex;
						align-items: center;
						flex-wrap: wrap;
						justify-content: flex-end;
						text{
							margin-right: 5px;
						}
					}
					.cart-footer-left-price-num{
						display: flex;
						align-items: baseline;
						font-size: 24rpx;
						color: #d81e06;
						text{
							font-size: 32rpx;
						}
					}
				}
				.red{
					color: #d81e06;
				}
				.cart-head-btton{
					height: 100%;
					font-size: 28rpx;
					color: #333333;
				}
				.cart-footer-right-button{
					display: flex;
					align-items: center;
					margin-left: 20rpx;
					text-align: right;
					.btns{
						border-radius: 100rpx;
						height: 36px;
						padding: 0 10px;
						min-width: 80px;
					}
				}
			}
		}
	}
}
</style>
