<template>
	<view class="container">
		<!-- 空白页 -->
		<view v-if="!hasLogin || empty === true" class="empty">
			<image src="/static/error/emptyCart.png" class="emptyImg" mode="aspectFit"></image>
			<view v-if="hasLogin" class="empty-tips">
				空空如也
				<navigator class="navigator" v-if="hasLogin" url="../home/index" open-type="switchTab">随便逛逛>
				</navigator>
			</view>
			<view v-else class="empty-tips">
				空空如也
				<view class="navigator" @click="navToLogin">去登陆></view>
			</view>
		</view>
		<view v-else>
			<!-- 列表 -->
			<view class="cart-list">
				<block v-for="(item, index) in cartList" :key="item.id">
					<view class="cart-item" :class="{ 'b-b': index !== cartList.length - 1 }">
						<view class="flex padding-r-20" @click="item.checked=!item.checked">
							<image v-if='item.checked' class="checkedGoods" src="../../static/icon/addressIconXz.png"
								mode="scaleToFill">
							</image>
							<view v-else class="icon-checked-box">

							</view>
						</view>
						<image class="image-wrapper" :src="item.productInfo.image" :class="[item.loaded]"
							mode="aspectFill" lazy-load @load="onImageLoad('cartList', index)"
							@error="onImageError('cartList', index)"></image>
						<view class="item-right">
							<view class="clamp title">{{ item.productInfo.store_name }}</view>
							<view class="attr">{{ item.productInfo.attrInfo.suk }}</view>
							<view class="flex">
								<text class="price">¥{{ item.productInfo.price }}</text>
								<uni-number-box class="step" :min="1" :max="item.productInfo.stock"
									:value="item.cart_num > item.productInfo.stock ? item.productInfo.stock : item.cart_num"
									:isMax="item.cart_num >= item.productInfo.stock ? true : false"
									:isMin="item.cart_num === 1" :index="index" @eventChange="numberChange">
								</uni-number-box>
							</view>
							<view class="server" v-if="item.day>0">
								(服务费：{{item.day_deducted}} 服务天数：{{item.day}})
							</view>
						</view>
						<image class="del-btn" src="../../static/icon/goodsExit.png" @click="deleteCartItem(index)"
							mode="scaleToFill"></image>
					</view>
				</block>
			</view>
			<!-- 底部菜单栏 -->
			<view class="action-section">
				<view class="flex leftBox">
					<view class="checkbox" @click="check('all')">
						<image class="icon-checked-box icon-checked" v-if='allChecked'
							src="../../static/icon/addressIconXz.png" mode="scaleToFill"></image>
						<view v-else class="icon-checked-box"></view>
					</view>
					<view class="margin-l-20">
						全选
					</view>
				</view>
				<view class="total-box">
					<view class="font-size-base">
						<text>合计：</text>
						<text class="price">¥{{ total }}</text>

					</view>
					<view class="coupon">
						共{{checkedNum}}件商品
					</view>
				</view>
				<button type="primary" class="no-border confirm-btn" @click="createOrder">立即购买</button>
			</view>
		</view>
	</view>
</template>

<script>
	import {
		getCartList,
		getCartNum,
		cartDel
	} from '@/api/user.js';
	import {
		mapState
	} from 'vuex';
	import {
		saveUrl,
		interceptor
	} from '@/utils/loginUtils.js';
	export default {
		data() {
			return {
				total: 0, //总价格
				allChecked: false, //全选状态  true|false
				empty: false, //空白页现实  true|false
				cartList: []
			};
		},
		onShow() {
			uni.setTabBarStyle({
				backgroundColor: '#FFFFFF'
			})
			// 只有登录时才加载数据
			if (this.hasLogin) {
				this.loadData();
			}
		},
		watch: {
			//显示空白页
			cartList(e) {
				let empty = e.length === 0 ? true : false;
				if (this.empty !== empty) {
					this.empty = empty;
				}
			}
		},
		computed: {
			...mapState('user', ['hasLogin']),
			...mapState('shop', ['shopDetail']),
			checkedNum() {
				let num = 0;
				for (var i = 0; i < this.cartList.length; i++) {
					if (this.cartList[i].checked) {
						num++
					}
				}
				return num
			},
		},
		methods: {
			//请求数据
			async loadData() {
				let obj = this;
				getCartList({
					store_id:obj.shopDetail.id
				})
					.then(function(e) {
						// 获取当前购物车物品增加数量
						let nub = obj.cartList.length;
						// 获取之前对象数组
						let aArray = obj.cartList.reverse();
						// 获取返回数据对象数组
						let bArray = e.data.valid.reverse();
						obj.cartList = bArray
							.map((item, ind) => {
								// 设置返回数据默认为勾选状态
								item.checked = true;
								// 获取相同数组之前对象的数据
								let carlist = aArray[ind];
								// 判断之前是否已经加载完毕
								if (carlist && carlist.loaded == 'loaded') {
									item.loaded = 'loaded';
								}
								return item;
							})
							.reverse();
						obj.calcTotal(); //计算总价
					})
					.catch(function(e) {
						console.log(e);
					});
			},
			//监听image加载完成
			onImageLoad(key, index) {
				// 修改载入完成后图片class样式
				this.$set(this[key][index], 'loaded', 'loaded');
			},
			//监听image加载失败
			onImageError(key, index) {
				this[key][index].image = '/static/error/errorImage.jpg';
			},
			// 跳转到登录页
			navToLogin() {
				// 保存地址
				saveUrl();
				// 登录拦截
				interceptor();
			},
			//选中状态处理
			check(type, index) {
				if (type === 'item') {
					this.cartList[index].checked = !this.cartList[index].checked;
				} else {
					const checked = !this.allChecked;
					const list = this.cartList;
					list.forEach(item => {
						item.checked = checked;
					});
					this.allChecked = checked;
				}
				this.calcTotal(type);
			},
			//数量
			numberChange(data) {
				let arr = this.cartList[data.index];
				arr.cart_num = data.number;
				getCartNum({
						id: arr.id,
						number: data.number
					})
					.then(e => {
						console.log(e);
					})
					.catch(function(e) {
						console.log(e);
					});
				this.calcTotal();
			},
			//删除
			deleteCartItem(index) {
				let list = this.cartList;
				let row = list[index];
				let id = row.id;
				uni.showModal({
					title: '提示',
					content: '是否删除'+row.productInfo.store_name,
					success: res => {
						if(res.confirm){
							cartDel({
								ids: id
							});
							this.cartList.splice(index, 1);
							uni.hideLoading();
							this.calcTotal();
						}
					}
				});
				
			},
			//清空
			// clearCart() {
			// 	uni.showModal({
			// 		content: '清空购物车？',
			// 		success: e => {
			// 			if (e.confirm) {
			// 				let st = this.cartList.map(e => {
			// 					return e.id;
			// 				});
			// 				cartDel({
			// 					ids: st.join(',')
			// 				}).then(e => {
			// 					console.log(e);
			// 				});
			// 				this.cartList = [];
			// 			}
			// 		}
			// 	});
			// },
			//计算总价
			calcTotal() {
				let list = this.cartList;
				if (list.length === 0) {
					this.empty = true;
					return;
				}
				let total = 0;
				let checked = true;
				list.forEach(item => {
					if (item.checked === true) {
						total += item.productInfo.price * item.cart_num;
					} else if (checked === true) {
						checked = false;
					}
				});
				this.allChecked = checked;
				this.total = Number(total.toFixed(2));
			},
			//创建订单
			createOrder() {
				let list = this.cartList;
				let goodsData = [];
				list.forEach(item => {
					if (item.checked) {
						goodsData.push(item.id);
					}
				});

				uni.navigateTo({
					url: '/pages/order/createOrder?id=' + goodsData.join(',')
				});
			}
		}
	};
</script>

<style lang="scss">
	.container {
		padding-bottom: 134rpx;
		background-color: $page-color-base;
		/* #ifdef MP-WEIXIN || H5 */
		padding-top: 30rpx;
		/* #endif */
		/* #ifdef APP */
		padding-top: var(--status-bar-height);
		/* #endif */
		/* 空白页 */
		.empty {
			position: fixed;
			left: 0;
			top: 0;
			width: 100%;
			height: 100vh;
			padding-bottom: 100rpx;
			display: flex;
			justify-content: center;
			flex-direction: column;
			align-items: center;
			background: #fff;

			.emptyImg {
				width: 300rpx;
				height: 250rpx;
				margin-bottom: 30rpx;
			}

			.empty-tips {
				display: flex;
				font-size: $font-sm + 2rpx;
				color: $font-color-disabled;

				.navigator {
					color: $uni-color-primary;
					margin-left: 16rpx;
				}
			}
		}
	}

	/* 购物车列表项 */
	.cart-list {
		padding: 0 30rpx;
	}

	.cart-item {
		display: flex;
		position: relative;
		padding: 20rpx;
		background-color: #FFFFFF;
		margin-bottom: 20rpx;
		border-radius: 20rpx;

		.icon-checked-box {
			width: 37rpx;
			height: 37rpx;
			z-index: 5;
			border: 1px solid $font-color-light;
			border-radius: 99rpx;
		}

		.checkedGoods {
			width: 37rpx;
			height: 37rpx;
		}

		.image-wrapper {
			width: 170rpx;
			height: 170rpx;
			flex-shrink: 0;
			position: relative;
			border-radius: 20rpx;
		}

		.checkbox {
			position: absolute;
			left: -16rpx;
			top: -16rpx;
			z-index: 8;
			font-size: 44rpx;
			line-height: 1;
			padding: 4rpx;
			color: $font-color-disabled;
			background: #fff;
			border-radius: 50px;
		}

		.item-right {
			overflow: hidden;
			position: relative;
			padding-left: 30rpx;
			flex-grow: 1;

			.title,
			.price {
				font-size: $font-base;
				color: $font-color-dark;
			}

			.attr {
				font-size: 24rpx;
				color: $font-color-light;
				height: 40rpx;
				line-height: 40rpx;
			}

			.server {
				font-size: 24rpx;
				color: $font-color-light;
				margin-top: 10rpx;
			}

			.price {
				font-size: 30rpx;
				color: $color-green;
			}
		}

		.del-btn {
			flex-shrink: 0;
			height: 40rpx;
			width: 40rpx;
		}
	}

	/* 底部栏 */
	.action-section {
		/* #ifdef H5 */
		margin-bottom: 100rpx;
		/* #endif */
		position: fixed;
		left: 0rpx;
		bottom: 0rpx;
		z-index: 95;
		display: flex;
		align-items: center;
		width: 750rpx;
		height: 100rpx;
		padding: 0 30rpx;
		background: rgba(255, 255, 255, 0.9);

		.leftBox {
			padding-right: 30rpx;
			border-right: 1px solid $font-color-disabled;
		}

		.checkbox {
			line-height: 1;
			font-size: 30rpx;

			.icon-checked-box {
				width: 37rpx;
				height: 37rpx;
				z-index: 5;
				border: 1px solid $font-color-light;
				border-radius: 99rpx;
			}

			.icon-checked {
				border: none;
				color: $base-color;
			}
		}

		.clear-btn {
			position: absolute;
			left: 26rpx;
			top: 0;
			z-index: 4;
			width: 0;
			height: 52rpx;
			line-height: 52rpx;
			padding-left: 38rpx;
			font-size: $font-base;
			color: #fff;
			background: $font-color-disabled;
			border-radius: 0 50px 50px 0;
			opacity: 0;
			transition: 0.2s;

			&.show {
				opacity: 1;
				width: 120rpx;
			}
		}

		.total-box {
			flex-grow: 1;
			padding-left: 30rpx;
			font-size: 30rpx;

			.price {
				color: $color-green;
			}

			.coupon {
				font-size: 24rpx;
				color: $font-color-light;
			}
		}

		.confirm-btn {
			padding: 0 70rpx;
			margin: 0;
			border-radius: 100px;
			height: 70rpx;
			line-height: 70rpx;
			font-size: 24rpx;
			background: $color-yellow;
			color: #714D01;
		}
	}

	/* 复选框选中状态 */
	.action-section .checkbox.checked,
	.cart-item .checkbox.checked {
		color: $base-color;
	}
</style>
