package com.matrix.system.shopXcx.api.service;
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import com.matrix.biz.bean.BizUser;
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import com.matrix.component.redis.RedisUserLoginUtils;
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import com.matrix.core.tools.LogUtil;
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import com.matrix.system.common.dao.BusParameterSettingsDao;
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import com.matrix.system.shopXcx.api.vo.ShopCartBillVo;
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import com.matrix.system.shopXcx.api.vo.ShopCartVo;
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import com.matrix.system.shopXcx.bean.ShopCoupon;
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import com.matrix.system.shopXcx.bean.ShopShoppingCart;
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import com.matrix.system.shopXcx.dao.ShopShoppingCartDao;
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import org.apache.commons.collections.CollectionUtils;
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import org.springframework.beans.factory.annotation.Autowired;
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import org.springframework.stereotype.Service;
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import java.math.BigDecimal;
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import java.util.*;
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@Service
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public class ShoppingCartService {
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@Autowired
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private ShopShoppingCartDao shoppingCartDao;
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@Autowired
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private RedisUserLoginUtils redisUserLoginUtils;
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@Autowired
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WxShopCouponService shopCouponService;
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@Autowired
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BusParameterSettingsDao busParameterSettingsDao;
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public ShopCartBillVo buildShopCartBillVo(List<ShopCartVo> cartList) {
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ShopCartBillVo shopCartBillVo = new ShopCartBillVo();
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//计算购车选中项总价以及优惠金额
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BigDecimal billTotal = BigDecimal.ZERO;
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BigDecimal billCouponTotal = BigDecimal.ZERO;
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//未优惠之前的金额
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BigDecimal srcTotal = BigDecimal.ZERO;
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//计算是否存在选中的产品
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Integer selectCount = 0;
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//购物车总条数
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Integer cartCount = 0;
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for (ShopCartVo shopCartVo : cartList) {
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if (shopCartVo.getSubtotal() != null) {
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shopCartBillVo.setBillTotal(shopCartBillVo.getBillTotal().add(shopCartVo.getSubtotal()));
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shopCartBillVo.setSrcTotal(shopCartBillVo.getSrcTotal().add(shopCartVo.getSrcPrice()));
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}
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if (shopCartVo.getCouponPrice() != null) {
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if (shopCartVo.isSatisfactionCoupon()) {
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shopCartBillVo.setBillCouponTotal(shopCartBillVo.getBillCouponTotal().add(shopCartVo.getCouponPrice()));
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}
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}
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for (ShopShoppingCart shopCart : shopCartVo.getCartList()) {
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if (shopCart.getIsSelected() == 1) {
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selectCount += shopCart.getCartNumber();
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}
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cartCount += shopCart.getCartNumber();
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}
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}
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shopCartBillVo.setCartCount(cartCount);
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shopCartBillVo.setSelectCount(selectCount);
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return shopCartBillVo;
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}
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/**
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* 计算用户的购物车产品优惠分组
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*
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* @return
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* @param shopId
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*/
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public List<ShopCartVo> findUserCartList(Long shopId,Integer cartType) {
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BizUser loginUser = redisUserLoginUtils.getLoginUser(BizUser.class);
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String userId = loginUser.getOpenId();
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List<ShopShoppingCart> list = shoppingCartDao.selectByCartUserId(shopId,userId,cartType);
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List<ShopCartVo> cartList = buildShopCart(list);
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return cartList;
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}
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/**
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* 组装购物车优惠信息
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*
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* @param list
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* @return
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*/
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@SuppressWarnings("unchecked")
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private List<ShopCartVo> buildShopCart(List<ShopShoppingCart> list) {
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//定义购物车优惠分组
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List<ShopCartVo> cartList = new ArrayList<>();
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// 1表示没有优惠的默认分组
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ShopCartVo def = new ShopCartVo();
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def.setMsg("商城");
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def.setCartList(new ArrayList<>());
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// 组合默认分组
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cartList.add(def);
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// 记录所有优惠券，一个优惠券（活动）表示一组
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Map<Integer, ShopCoupon> shopCouponMap = new HashMap<>();
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//查询购物车中的产品匹配上的所有优惠活动
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for (ShopShoppingCart shoppingCart : list) {
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List<ShopCoupon> shopCoupons = shopCouponService.getHdListByProductId(shoppingCart.getCartProductId());
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if (CollectionUtils.isNotEmpty(shopCoupons)) {
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// 把所有的优惠券和购物车条目先关联一下,后续可以计算优惠升级的情况
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shoppingCart.setShopCoupons(shopCoupons);
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for (ShopCoupon shopCoupon : shopCoupons) {
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shopCouponMap.put(shopCoupon.getId(), shopCoupon);
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}
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} else {
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// 该产品没有参加优惠券
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def.getCartList().add(shoppingCart);
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}
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}
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//计算没有优惠组的价格
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countPrice(def);
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/*
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* 计算优惠券分组 1、获取到所有的优惠券，从最高满减开始，找寻合适的产品，找到后加入对应的购物车组
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* 2、计算组内价格，只计算选中状态的
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*/
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Set<Integer> keys = shopCouponMap.keySet();
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List<ShopCoupon> allShopCoupons = new ArrayList<>();
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for (Integer key : keys) {
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allShopCoupons.add(shopCouponMap.get(key));
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}
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//根据优惠力度排序，优惠力度大的先参与计算
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Collections.sort(allShopCoupons, new Comparator() {
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@Override
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public int compare(Object o1, Object o2) {
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ShopCoupon e1 = (ShopCoupon) o1;
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ShopCoupon e2 = (ShopCoupon) o2;
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return e2.getMinAmount().compareTo(e1.getMinAmount());
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}
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});
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// 进行购物车和优惠券的匹配，匹配成功的加入到优惠组中，
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for (int i = 0; i < allShopCoupons.size(); i++) {
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ShopCoupon shopCoupon = allShopCoupons.get(i);
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ShopCartVo shopCarVo = new ShopCartVo();
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shopCarVo.setCoupon(shopCoupon);
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shopCarVo.setCartList(new ArrayList<>());
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cartList.add(i, shopCarVo);
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// 获取所有购物车条目
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for (ShopShoppingCart shoppingCart : list) {
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// 如果匹配到的产品已经出现在其他优惠组中，则需要判断是否移除之前的组
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boolean needRemove = false;
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// 判断当前购物车条目是否已经在合适的组里了
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if (isInGroupAndSatisfaction(shoppingCart, cartList)) {
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continue;
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} else if (isInGroupNotSatisfaction(shoppingCart, cartList)) {
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needRemove = true;
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}
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List<ShopCoupon> cartCouons = shoppingCart.getShopCoupons();
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if (cartCouons != null) {
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// 获取每个购物车条目满足的优惠
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for (ShopCoupon cartCouon : cartCouons) {
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if (cartCouon.getId().equals(shopCoupon.getId())) {
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//匹配成功，加入本组
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LogUtil.debug("购物车" + shoppingCart.getName() + "和优惠券" + cartCouon.getCName() + "匹配");
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if (needRemove) {
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removeNotSatisfaction(shoppingCart, cartList);
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}
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shopCarVo.getCartList().add(shoppingCart);
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break;
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}
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}
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}
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}
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// 计算本组优惠券是否已经满足优惠条件
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countPrice(shopCarVo);
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}
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// 因为有些优惠中可能没有产品，所以要去除cartList中没有产品的分组
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List<ShopCartVo> cartListCopy = new ArrayList<>();
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for (ShopCartVo shopCartVo : cartList) {
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if (CollectionUtils.isNotEmpty(shopCartVo.getCartList())) {
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cartListCopy.add(shopCartVo);
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}
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}
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return cartListCopy;
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}
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/**
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* 购车条目在组中并且组是否已经满足优惠的
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*
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* @param shopShoppingCart
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* @param cartList
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* @return
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*/
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private boolean isInGroupAndSatisfaction(ShopShoppingCart shopShoppingCart, List<ShopCartVo> cartList) {
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boolean result = false;
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for (ShopCartVo cartVo : cartList) {
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if (cartVo.isSatisfactionCoupon() && cartVo.getCartList().contains(shopShoppingCart)) {
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result = true;
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}
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}
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return result;
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}
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/**
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* 购物车条目在组中，但是组中产品没有达到优惠条件
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*
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* @param shopShoppingCart
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* @param cartList
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* @return
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*/
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private boolean isInGroupNotSatisfaction(ShopShoppingCart shopShoppingCart, List<ShopCartVo> cartList) {
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boolean result = false;
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for (ShopCartVo cartVo : cartList) {
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if (!cartVo.isSatisfactionCoupon() && cartVo.getCartList().contains(shopShoppingCart)) {
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result = true;
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}
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}
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return result;
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}
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/**
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* 删除购物车条目所在分组中的引用
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*
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* @param shopShoppingCart
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* @param cartList
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*/
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private void removeNotSatisfaction(ShopShoppingCart shopShoppingCart, List<ShopCartVo> cartList) {
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for (ShopCartVo cartVo : cartList) {
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if (cartVo.getCartList().remove(shopShoppingCart)) {
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LogUtil.debug("删除购物车所在组" + cartVo.getCoupon().getCName() + "," + shopShoppingCart.getName());
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}
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}
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}
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/**
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* 计算购物车价格和优惠信息
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*
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* @author JIANGYOUYAO
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* @email 935090232@qq.com
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* @date 2019年8月27日
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*/
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private void countPrice(ShopCartVo shopCartVo) {
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List<ShopShoppingCart> cartList = shopCartVo.getCartList();
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// 计算总价
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BigDecimal sum = BigDecimal.ZERO;
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// 选中项总价
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BigDecimal selectSum = BigDecimal.ZERO;
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for (ShopShoppingCart shopShoppingCart : cartList) {
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sum = sum.add(shopShoppingCart.getPrice().multiply(BigDecimal.valueOf(shopShoppingCart.getCartNumber())));
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if (shopShoppingCart.getIsSelected() == 1) {
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selectSum = selectSum
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.add(shopShoppingCart.getPrice().multiply(BigDecimal.valueOf(shopShoppingCart.getCartNumber())));
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}
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}
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if (shopCartVo.getCoupon() != null) {
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// 存在优惠券
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if (sum.compareTo(shopCartVo.getCoupon().getMinAmount()) >= 0) {
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//标记为合理分组
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shopCartVo.setSatisfactionCoupon(true);
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if (selectSum.compareTo(shopCartVo.getCoupon().getMinAmount()) >= 0) {
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shopCartVo.setSubtotal(selectSum.subtract(shopCartVo.getCoupon().getOffsetAmount()));
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shopCartVo.setSrcPrice(selectSum);
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shopCartVo.setCouponPrice(shopCartVo.getCoupon().getOffsetAmount());
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shopCartVo.setMsg(shopCartVo.getCoupon().getCName() + ",已优惠"
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+ shopCartVo.getCoupon().getOffsetAmount().stripTrailingZeros().toPlainString() + "元");
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}
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}
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if (selectSum.compareTo(shopCartVo.getCoupon().getMinAmount()) < 0) {
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shopCartVo.setSatisfactionCoupon(false);
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shopCartVo.setSubtotal(selectSum);
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shopCartVo.setSrcPrice(selectSum);
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shopCartVo.setMsg(shopCartVo.getCoupon().getCName());
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if (selectSum.doubleValue() > 0) {
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shopCartVo.setMsg(shopCartVo.getCoupon().getCName() + ",再买"
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+ (shopCartVo.getCoupon().getMinAmount().subtract(selectSum)).stripTrailingZeros()
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.toPlainString()
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+ "元立减" + shopCartVo.getCoupon().getOffsetAmount().stripTrailingZeros().toPlainString()
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+ "元");
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}
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}
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} else {
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shopCartVo.setSubtotal(selectSum);
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shopCartVo.setSrcPrice(selectSum);
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shopCartVo.setSatisfactionCoupon(true);
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}
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}
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}
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