package cn.iocoder.yudao.module.trade.service.price.calculator;
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import cn.hutool.core.lang.Assert;
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import cn.hutool.core.util.ObjectUtil;
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import cn.hutool.core.util.StrUtil;
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import cn.iocoder.yudao.module.promotion.api.bargain.BargainRecordApi;
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import cn.iocoder.yudao.module.promotion.api.bargain.dto.BargainValidateJoinRespDTO;
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import cn.iocoder.yudao.module.promotion.enums.common.PromotionTypeEnum;
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import cn.iocoder.yudao.module.trade.enums.order.TradeOrderTypeEnum;
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import cn.iocoder.yudao.module.trade.service.price.bo.TradePriceCalculateReqBO;
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import cn.iocoder.yudao.module.trade.service.price.bo.TradePriceCalculateRespBO;
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import org.springframework.core.annotation.Order;
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import org.springframework.stereotype.Component;
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import jakarta.annotation.Resource;
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/**
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* 砍价活动的 {@link TradePriceCalculator} 实现类
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*
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* @author 芋道源码
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*/
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@Component
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@Order(TradePriceCalculator.ORDER_BARGAIN_ACTIVITY)
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public class TradeBargainActivityPriceCalculator implements TradePriceCalculator {
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@Resource
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private BargainRecordApi bargainRecordApi;
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@Override
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public void calculate(TradePriceCalculateReqBO param, TradePriceCalculateRespBO result) {
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// 1. 判断订单类型和是否具有砍价记录编号
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if (ObjectUtil.notEqual(result.getType(), TradeOrderTypeEnum.BARGAIN.getType())) {
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return;
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}
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Assert.isTrue(param.getItems().size() == 1, "砍价时，只允许选择一个商品");
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Assert.isTrue(param.getItems().get(0).getCount() == 1, "砍价时，商品数量只允许为 1");
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// 2. 校验是否可以参与砍价
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TradePriceCalculateRespBO.OrderItem orderItem = result.getItems().get(0);
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BargainValidateJoinRespDTO bargainActivity = bargainRecordApi.validateJoinBargain(
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param.getUserId(), param.getBargainRecordId(), orderItem.getSkuId());
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// 3.1 记录优惠明细
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Integer discountPrice = orderItem.getPayPrice() - bargainActivity.getBargainPrice() * orderItem.getCount();
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// TODO 芋艿：极端情况，优惠金额为负数，需要处理
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TradePriceCalculatorHelper.addPromotion(result, orderItem,
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bargainActivity.getActivityId(), bargainActivity.getName(), PromotionTypeEnum.BARGAIN_ACTIVITY.getType(),
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StrUtil.format("砍价活动：省 {} 元", TradePriceCalculatorHelper.formatPrice(discountPrice)),
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discountPrice);
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// 3.2 更新 SKU 优惠金额
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orderItem.setDiscountPrice(orderItem.getDiscountPrice() + discountPrice);
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TradePriceCalculatorHelper.recountPayPrice(orderItem);
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TradePriceCalculatorHelper.recountAllPrice(result);
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// 4. 特殊：设置对应的砍价活动编号
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result.setBargainActivityId(bargainActivity.getActivityId());
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}
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}
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