<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="../index/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>
			<!-- 购物车头部 -->
			<view class="cart-hand flex">
				<view class="hand-tit">
					购物车共
					<text>{{ ' ' + cartList.length }} 件</text>
					商品
				</view>
				<view class="hand-btn" @click="clearCart()">清空购物车</view>
			</view>
			<!-- 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="image-wrapper">
							<image :src="item.productInfo.image" :class="[item.loaded]" mode="aspectFill" lazy-load
								@load="onImageLoad('cartList', index)" @error="onImageError('cartList', index)"></image>
							<view class="iconfont iconroundcheckfill checkbox" :class="{ checked: item.checked }"
								@click="check('item', index)"></view>
						</view>
						<view class="item-right">
							<text class="clamp title">{{ item.productInfo.store_name }}</text>
							<text class="attr">{{ item.productInfo.attrInfo.suk }}</text>
							<text class="price">¥{{ item.truePrice }}</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 class="munbox flex">
								<image src="../../static/icon/reduce.png" mode="" @click="reduce(item, index)"></image>
								<input type="number" :value="item.cart_num" disabled />
								<image src="../../static/icon/add.png" mode="" @click="add(item)"></image>
							</view>
						</view>
						<!-- <text class="del-btn iconfont iconclose" @click="deleteCartItem(index)"></text> -->
					</view>
				</block>
			</view>
			<!-- 底部菜单栏 -->
			<view class="action-section">
				<view class="checkbox">
					<view class="iconfont iconroundcheckfill icon-checked-box" @click="check('all')"
						:class="{ 'icon-checked': allChecked }"></view>
					<!-- <view class="clear-btn" @click="allChecked ? clearCart() : ''" :class="{ show: allChecked }"><text>清空</text></view> -->
				</view>
				<view class="total-box">
					<text class="price">¥{{ total }}</text>
					<!-- <text class="coupon">
						已优惠
						<text>74.35</text>
						元
					</text> -->
				</view>
				<button type="primary" class="no-border confirm-btn" @click="createOrder">结算</button>
			</view>
		</view>
	</view>
</template>

<script>
	// #ifdef H5
	import weixinObj from '@/plugin/jweixin-module/index.js';
	// #endif
	import {
		getCartList,
		getCartNum,
		cartDel
	} from '@/api/user.js';
	import {
		mapState
	} from 'vuex';
	import uniNumberBox from '@/components/uni-number-box.vue';
	import {
		saveUrl,
		interceptor
	} from '@/utils/loginUtils.js';
	// #ifdef H5
	import {
		shareLoad
	} from '@/utils/wxAuthorized';
	// #endif
	export default {
		components: {
			uniNumberBox
		},
		data() {
			return {
				current: 3,
				total: 0, //总价格
				allChecked: false, //全选状态  true|false
				empty: false, //空白页现实  true|false
				cartList: []
			};
		},
		onShow() {
			// 只有登录时才加载数据
			if (this.hasLogin) {
				this.loadData();
			}
			// #ifdef H5
			weixinObj.hideAllNonBaseMenuItem();
			shareLoad()
			// #endif
			
		},
		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'])
		},
		methods: {
			reduce(item, index) {
				if (item.cart_num == 1) {
					uni.showModal({
						content: '删除该商品？',
						success: e => {
							if (e.confirm) {
								this.deleteCartItem(index);
							}
						}
					});
				} else {
					item.cart_num--;
					this.newNumberChange(item);
				}
			},
			add(item) {
				console.log(item);
				if (item.productInfo.stock > item.cart_num) {
					item.cart_num++;
					this.newNumberChange(item);
				} else {
					return;
				}
			},
			//请求数据
			async loadData() {
				let obj = this;
				getCartList({})
					.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();
			},
			newNumberChange(item) {
				getCartNum({
						id: item.id,
						number: item.cart_num
					})
					.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;
				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.truePrice * 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;

		/* 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: $base-color;
					margin-left: 16rpx;
				}
			}
		}
	}

	/* 购物车列表项 */
	.cart-item {
		width: 710rpx;
		height: 210rpx;
		background: #ffffff;
		box-shadow: 0px 0px 10rpx 0rpx rgba(0, 0, 0, 0.1);
		border-radius: 10rpx;
		margin: 20rpx auto;

		display: flex;
		position: relative;
		padding: 30rpx 26rpx 30rpx 80rpx;

		.image-wrapper {
			width: 150rpx;
			height: 150rpx;
			flex-shrink: 0;
			position: relative;

			image {
				border-radius: 8rpx;
			}
		}

		.checkbox {
			position: absolute;
			top: 0;
			bottom: 0;
			left: -65rpx;
			margin: auto 0;
			height: 50rpx;
			z-index: 8;
			font-size: 44rpx;
			line-height: 1;
			padding: 4rpx;
			color: $font-color-disabled;
			background: #fff;
			border-radius: 50px;
		}

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

			.munbox {
				width: 144rpx;
				height: 44rpx;
				position: absolute;
				bottom: 0;
				right: 0;

				input {
					display: inline-block;
					text-align: center;
				}

				image {
					flex-shrink: 0;
					width: 44rpx;
					height: 44rpx;
				}
			}

			.title,
			.price {
				font-size: $font-base + 2rpx;
				color: $font-color-dark;
				height: 40rpx;
				line-height: 40rpx;
			}

			.attr {
				font-size: $font-sm + 2rpx;
				color: $font-color-light;
				height: 50rpx;
				line-height: 50rpx;

				font-size: 26rpx;
				font-family: PingFang SC;
				font-weight: bold;
				color: #999999;
			}

			.price {
				// height: 50rpx;
				// line-height: 50rpx;
				padding-top: 20rpx;
				font-size: 34rpx;
				font-family: PingFang SC;
				font-weight: bold;
				color: $base-color;
			}

			.step {
				margin-top: 20rpx;
			}

			.title {
				font-size: 34rpx;
				font-family: PingFang SC;
				font-weight: bold;
				color: #333333;
			}
		}

		.del-btn {
			padding: 4rpx 10rpx;
			font-size: 34rpx;
			height: 50rpx;
			color: $font-color-light;
		}
	}

	/* 底部栏 */
	.action-section {
		/* #ifdef H5 */
		margin-bottom: 100rpx;
		/* #endif */
		position: fixed;
		left: 30rpx;
		bottom: 30rpx;
		z-index: 95;
		display: flex;
		align-items: center;
		width: 690rpx;
		height: 100rpx;
		padding: 0 30rpx;
		background: rgba(255, 255, 255, 0.9);
		box-shadow: 0 0 20rpx 0 rgba(0, 0, 0, 0.5);
		border-radius: 16rpx;

		.checkbox {
			height: 52rpx;
			position: relative;

			.icon-checked-box {
				border-radius: 50rpx;
				background-color: #ffffff;
				width: 52rpx;
				height: 100%;
				position: relative;
				z-index: 5;
				font-size: 53rpx;
				line-height: 1;
				color: $font-color-light;
			}

			.icon-checked {
				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: 1;
			display: flex;
			flex-direction: column;
			text-align: right;
			padding-right: 40rpx;

			.price {
				font-size: $font-lg;
				color: $font-color-dark;
			}

			.coupon {
				font-size: $font-sm;
				color: $font-color-light;

				text {
					color: $font-color-dark;
				}
			}
		}

		.confirm-btn {
			padding: 0 38rpx;
			margin: 0;
			border-radius: 100px;
			height: 76rpx;
			line-height: 76rpx;
			font-size: $font-base + 2rpx;
			background: $base-color;
			color: #fff;
		}
	}

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

	.cart-hand {
		width: 750rpx;
		height: 88rpx;
		background: #ffffff;
		font-size: 30rpx;
		font-family: PingFang SC;
		font-weight: bold;
		color: #333333;
		line-height: 88rpx;
		padding-left: 28rpx;
		padding-right: 26rpx;

		.hand-tit {
			text {
				color: $base-color;
			}
		}

		.hand-btn {
			width: 164rpx;
			height: 62rpx;
			border: 2rpx solid $base-color;
			border-radius: 31rpx;
			font-size: 26rpx;
			font-family: PingFang SC;
			font-weight: bold;
			color: $base-color;
			line-height: 62rpx;
			text-align: center;
		}
	}
</style>