trade：价格计算时，接入优惠劵逻辑

yudao-module-mall/yudao-module-promotion-api/src/main/java/cn/iocoder/yudao/module/promotion/api/seckill/SeckillActivityApi.java

@@ -1,9 +1,6 @@
 package cn.iocoder.yudao.module.promotion.api.seckill;
 
-import cn.iocoder.yudao.module.promotion.api.seckill.dto.SeckillActivityProductRespDTO;
-
-import java.util.Collection;
-import java.util.List;
+import cn.iocoder.yudao.module.promotion.api.seckill.dto.SeckillValidateJoinRespDTO;
 
 /**
  * 秒杀活动 API 接口
@@ -22,12 +19,14 @@ public interface SeckillActivityApi {
     void updateSeckillStock(Long id, Long skuId, Integer count);
 
     /**
-     * 获取秒杀活动商品信息
+     * 校验是否参与秒杀商品
+     *
+     * 如果校验失败，则抛出业务异常
      *
-     * @param id     活动编号
-     * @param skuIds sku 编号
-     * @return 秒杀活动商品信息列表
+     * @param activityId 活动编号
+     * @param skuId SKU 编号
+     * @param count 数量
      */
-    List<SeckillActivityProductRespDTO> getSeckillActivityProductList(Long id, Collection<Long> skuIds);
+    SeckillValidateJoinRespDTO validateJoinSeckill(Long activityId, Long skuId, Integer count);
 
 }

yudao-module-mall/yudao-module-promotion-api/src/main/java/cn/iocoder/yudao/module/promotion/api/seckill/dto/SeckillActivityProductRespDTO.java

@@ -1,65 +0,0 @@
-package cn.iocoder.yudao.module.promotion.api.seckill.dto;
-
-import cn.iocoder.yudao.framework.common.enums.CommonStatusEnum;
-import lombok.Data;
-
-import java.time.LocalDateTime;
-import java.util.List;
-
-/**
- * 秒杀活动商品 Response DTO
- *
- * @author HUIHUI
- */
-@Data
-public class SeckillActivityProductRespDTO {
-
-    /**
-     * 秒杀参与商品编号
-     */
-    private Long id;
-    /**
-     * 秒杀活动 id
-     *
-     * 关联 SeckillActivityDO#getId()
-     */
-    private Long activityId;
-    /**
-     * 秒杀时段 id
-     *
-     * 关联 SeckillConfigDO#getId()
-     */
-    private List<Long> configIds;
-    /**
-     * 商品 SPU 编号
-     */
-    private Long spuId;
-    /**
-     * 商品 SKU 编号
-     */
-    private Long skuId;
-    /**
-     * 秒杀金额，单位：分
-     */
-    private Integer seckillPrice;
-    /**
-     * 秒杀库存
-     */
-    private Integer stock;
-
-    /**
-     * 秒杀商品状态
-     *
-     * 枚举 {@link CommonStatusEnum 对应的类}
-     */
-    private Integer activityStatus;
-    /**
-     * 活动开始时间点
-     */
-    private LocalDateTime activityStartTime;
-    /**
-     * 活动结束时间点
-     */
-    private LocalDateTime activityEndTime;
-
-}

yudao-module-mall/yudao-module-promotion-api/src/main/java/cn/iocoder/yudao/module/promotion/api/seckill/dto/SeckillValidateJoinRespDTO.java

@@ -0,0 +1,27 @@
+package cn.iocoder.yudao.module.promotion.api.seckill.dto;
+
+import lombok.Data;
+
+/**
+ * 校验参与秒杀 Response DTO
+ */
+@Data
+public class SeckillValidateJoinRespDTO {
+
+    /**
+     * 秒杀活动名称
+     */
+    private String name;
+    /**
+     * 总限购数量
+     *
+     * 目的：目前只有 trade 有具体下单的数据，需要交给 trade 价格计算使用
+     */
+    private Integer totalLimitCount;
+
+    /**
+     * 秒杀金额
+     */
+    private Integer seckillPrice;
+
+}

yudao-module-mall/yudao-module-promotion-api/src/main/java/cn/iocoder/yudao/module/promotion/enums/ErrorCodeConstants.java

@@ -56,6 +56,10 @@ public interface ErrorCodeConstants {
     ErrorCode SECKILL_ACTIVITY_DELETE_FAIL_STATUS_NOT_CLOSED_OR_END = new ErrorCode(1_013_008_004, "秒杀活动未关闭或未结束，不能删除");
     ErrorCode SECKILL_ACTIVITY_CLOSE_FAIL_STATUS_CLOSED = new ErrorCode(1_013_008_005, "秒杀活动已关闭，不能重复关闭");
     ErrorCode SECKILL_ACTIVITY_UPDATE_STOCK_FAIL = new ErrorCode(1_013_008_006, "秒杀失败，原因秒杀库存不足");
+    ErrorCode SECKILL_JOIN_ACTIVITY_TIME_ERROR = new ErrorCode(1_013_008_007, "秒杀失败，原因：不在活动时间范围内");
+    ErrorCode SECKILL_JOIN_ACTIVITY_STATUS_CLOSED = new ErrorCode(1_013_008_008, "秒杀失败，原因：秒杀活动已关闭");
+    ErrorCode SECKILL_JOIN_ACTIVITY_SINGLE_LIMIT_COUNT_EXCEED = new ErrorCode(1_013_008_009, "秒杀失败，原因：单次限购超出");
+    ErrorCode SECKILL_JOIN_ACTIVITY_PRODUCT_NOT_EXISTS = new ErrorCode(1_013_008_010, "秒杀失败，原因：商品不存在");
 
     // ========== 秒杀时段 1-013-009-000 ==========
     ErrorCode SECKILL_CONFIG_NOT_EXISTS = new ErrorCode(1_013_009_000, "秒杀时段不存在");

yudao-module-mall/yudao-module-promotion-biz/src/main/java/cn/iocoder/yudao/module/promotion/api/seckill/SeckillActivityApiImpl.java

@@ -1,13 +1,10 @@
 package cn.iocoder.yudao.module.promotion.api.seckill;
 
-import cn.iocoder.yudao.module.promotion.api.seckill.dto.SeckillActivityProductRespDTO;
-import cn.iocoder.yudao.module.promotion.convert.seckill.seckillactivity.SeckillActivityConvert;
+import cn.iocoder.yudao.module.promotion.api.seckill.dto.SeckillValidateJoinRespDTO;
 import cn.iocoder.yudao.module.promotion.service.seckill.SeckillActivityService;
 import org.springframework.stereotype.Service;
 
 import javax.annotation.Resource;
-import java.util.Collection;
-import java.util.List;
 
 /**
  * 秒杀活动接口 Api 接口实现类
@@ -26,8 +23,8 @@ public class SeckillActivityApiImpl implements SeckillActivityApi {
     }
 
     @Override
-    public List<SeckillActivityProductRespDTO> getSeckillActivityProductList(Long id, Collection<Long> skuIds) {
-        return SeckillActivityConvert.INSTANCE.convertList4(activityService.getSeckillActivityProductList(id, skuIds));
+    public SeckillValidateJoinRespDTO validateJoinSeckill(Long activityId, Long skuId, Integer count) {
+        return activityService.validateJoinSeckill(activityId, skuId, count);
     }
 
 }

yudao-module-mall/yudao-module-promotion-biz/src/main/java/cn/iocoder/yudao/module/promotion/convert/seckill/seckillactivity/SeckillActivityConvert.java

@@ -6,7 +6,7 @@ import cn.iocoder.yudao.framework.common.util.collection.MapUtils;
 import cn.iocoder.yudao.framework.dict.core.util.DictFrameworkUtils;
 import cn.iocoder.yudao.module.product.api.spu.dto.ProductSpuRespDTO;
 import cn.iocoder.yudao.module.product.enums.DictTypeConstants;
-import cn.iocoder.yudao.module.promotion.api.seckill.dto.SeckillActivityProductRespDTO;
+import cn.iocoder.yudao.module.promotion.api.seckill.dto.SeckillValidateJoinRespDTO;
 import cn.iocoder.yudao.module.promotion.controller.admin.seckill.vo.activity.SeckillActivityCreateReqVO;
 import cn.iocoder.yudao.module.promotion.controller.admin.seckill.vo.activity.SeckillActivityDetailRespVO;
 import cn.iocoder.yudao.module.promotion.controller.admin.seckill.vo.activity.SeckillActivityRespVO;
@@ -140,6 +140,6 @@ public interface SeckillActivityConvert {
                 .setStartTime(startTime).setEndTime(endTime);
     }
 
-    List<SeckillActivityProductRespDTO> convertList4(List<SeckillProductDO> seckillActivityProductList);
+    SeckillValidateJoinRespDTO convert02(SeckillActivityDO activity, SeckillProductDO product);
 
 }

yudao-module-mall/yudao-module-promotion-biz/src/main/java/cn/iocoder/yudao/module/promotion/dal/mysql/seckill/seckillactivity/SeckillActivityMapper.java

@@ -46,7 +46,7 @@ public interface SeckillActivityMapper extends BaseMapperX<SeckillActivityDO> {
                 .eq(SeckillActivityDO::getId, id)
                 .gt(SeckillActivityDO::getTotalStock, 0)
                 .setSql("stock = stock + " + count)
-                .setSql("totalStock = totalStock - " + count));
+                .setSql("total_stock = total_stock - " + count));
     }
 
     default PageResult<SeckillActivityDO> selectPage(AppSeckillActivityPageReqVO pageReqVO, Integer status) {

yudao-module-mall/yudao-module-promotion-biz/src/main/java/cn/iocoder/yudao/module/promotion/service/seckill/SeckillActivityService.java

@@ -1,6 +1,7 @@
 package cn.iocoder.yudao.module.promotion.service.seckill;
 
 import cn.iocoder.yudao.framework.common.pojo.PageResult;
+import cn.iocoder.yudao.module.promotion.api.seckill.dto.SeckillValidateJoinRespDTO;
 import cn.iocoder.yudao.module.promotion.controller.admin.seckill.vo.activity.SeckillActivityCreateReqVO;
 import cn.iocoder.yudao.module.promotion.controller.admin.seckill.vo.activity.SeckillActivityPageReqVO;
 import cn.iocoder.yudao.module.promotion.controller.admin.seckill.vo.activity.SeckillActivityUpdateReqVO;
@@ -115,4 +116,15 @@ public interface SeckillActivityService {
      */
     List<SeckillProductDO> getSeckillActivityProductList(Long id, Collection<Long> skuIds);
 
+    /**
+     * 校验是否参与秒杀商品
+     *
+     * 如果校验失败，则抛出业务异常
+     *
+     * @param activityId 活动编号
+     * @param skuId SKU 编号
+     * @param count 数量
+     */
+    SeckillValidateJoinRespDTO validateJoinSeckill(Long activityId, Long skuId, Integer count);
+
 }

yudao-module-mall/yudao-module-promotion-biz/src/main/java/cn/iocoder/yudao/module/promotion/service/seckill/SeckillActivityServiceImpl.java

@@ -4,10 +4,12 @@ import cn.hutool.core.collection.CollectionUtil;
 import cn.hutool.core.util.ObjectUtil;
 import cn.iocoder.yudao.framework.common.enums.CommonStatusEnum;
 import cn.iocoder.yudao.framework.common.pojo.PageResult;
+import cn.iocoder.yudao.framework.common.util.date.LocalDateTimeUtils;
 import cn.iocoder.yudao.module.product.api.sku.ProductSkuApi;
 import cn.iocoder.yudao.module.product.api.sku.dto.ProductSkuRespDTO;
 import cn.iocoder.yudao.module.product.api.spu.ProductSpuApi;
 import cn.iocoder.yudao.module.product.api.spu.dto.ProductSpuRespDTO;
+import cn.iocoder.yudao.module.promotion.api.seckill.dto.SeckillValidateJoinRespDTO;
 import cn.iocoder.yudao.module.promotion.controller.admin.seckill.vo.activity.SeckillActivityCreateReqVO;
 import cn.iocoder.yudao.module.promotion.controller.admin.seckill.vo.activity.SeckillActivityPageReqVO;
 import cn.iocoder.yudao.module.promotion.controller.admin.seckill.vo.activity.SeckillActivityUpdateReqVO;
@@ -15,6 +17,7 @@ import cn.iocoder.yudao.module.promotion.controller.admin.seckill.vo.product.Sec
 import cn.iocoder.yudao.module.promotion.controller.app.seckill.vo.activity.AppSeckillActivityPageReqVO;
 import cn.iocoder.yudao.module.promotion.convert.seckill.seckillactivity.SeckillActivityConvert;
 import cn.iocoder.yudao.module.promotion.dal.dataobject.seckill.SeckillActivityDO;
+import cn.iocoder.yudao.module.promotion.dal.dataobject.seckill.SeckillConfigDO;
 import cn.iocoder.yudao.module.promotion.dal.dataobject.seckill.SeckillProductDO;
 import cn.iocoder.yudao.module.promotion.dal.mysql.seckill.seckillactivity.SeckillActivityMapper;
 import cn.iocoder.yudao.module.promotion.dal.mysql.seckill.seckillactivity.SeckillProductMapper;
@@ -277,8 +280,7 @@ public class SeckillActivityServiceImpl implements SeckillActivityService {
 
     @Override
     public List<SeckillProductDO> getSeckillActivityProductList(Long id, Collection<Long> skuIds) {
-        // 1、校验秒杀活动是否存在
-        validateSeckillActivityExists(id);
+
         // 2、校验活动商品是否存在
         List<SeckillProductDO> productList = filterList(seckillProductMapper.selectListByActivityId(id),
                 item -> skuIds.contains(item.getSkuId()));
@@ -288,4 +290,36 @@ public class SeckillActivityServiceImpl implements SeckillActivityService {
         return productList;
     }
 
+    @Override
+    public SeckillValidateJoinRespDTO validateJoinSeckill(Long activityId, Long skuId, Integer count) {
+        // 1.1 校验秒杀活动是否存在
+        SeckillActivityDO activity = validateSeckillActivityExists(activityId);
+        if (ObjectUtil.notEqual(activity.getStatus(), CommonStatusEnum.ENABLE.getStatus())) {
+            throw exception(SECKILL_JOIN_ACTIVITY_STATUS_CLOSED);
+        }
+        // 1.2 是否在活动时间范围内
+        if (!LocalDateTimeUtils.isBetween(activity.getStartTime(), activity.getEndTime())) {
+            throw exception(SECKILL_JOIN_ACTIVITY_TIME_ERROR);
+        }
+        SeckillConfigDO config = seckillConfigService.getCurrentSeckillConfig();
+        if (config == null || !CollectionUtil.contains(activity.getConfigIds(), config.getId())) {
+            throw exception(SECKILL_JOIN_ACTIVITY_TIME_ERROR);
+        }
+        // 1.3 超过单次购买限制
+        if (count > activity.getSingleLimitCount()) {
+            throw exception(SECKILL_JOIN_ACTIVITY_SINGLE_LIMIT_COUNT_EXCEED);
+        }
+
+        // 2.1 校验秒杀商品是否存在
+        SeckillProductDO product = seckillProductMapper.selectByActivityIdAndSkuId(activityId, skuId);
+        if (product == null) {
+            throw exception(SECKILL_JOIN_ACTIVITY_PRODUCT_NOT_EXISTS);
+        }
+        // 2.2 校验库存是否充足
+        if (count > product.getStock()) {
+            throw exception(SECKILL_ACTIVITY_UPDATE_STOCK_FAIL);
+        }
+        return SeckillActivityConvert.INSTANCE.convert02(activity, product);
+    }
+
 }

yudao-module-mall/yudao-module-trade-api/src/main/java/cn/iocoder/yudao/module/trade/enums/ErrorCodeConstants.java

@@ -55,6 +55,7 @@ public interface ErrorCodeConstants {
     ErrorCode PRICE_CALCULATE_PAY_PRICE_ILLEGAL = new ErrorCode(1_011_003_000, "支付价格计算异常，原因：价格小于等于 0");
     ErrorCode PRICE_CALCULATE_DELIVERY_PRICE_TEMPLATE_NOT_FOUND = new ErrorCode(1_011_003_002, "计算快递运费异常，找不到对应的运费模板");
     ErrorCode PRICE_CALCULATE_COUPON_NOT_MATCH_NORMAL_ORDER = new ErrorCode(1_011_003_004, "参与秒杀、拼团、砍价的营销商品，无法使用优惠劵");
+    ErrorCode PRICE_CALCULATE_SECKILL_TOTAL_LIMIT_COUNT = new ErrorCode(1_011_003_005, "参与秒杀的商品，超过了秒杀总限购数量");
 
     // ========== 物流 Express 模块 1-011-004-000 ==========
     ErrorCode EXPRESS_NOT_EXISTS = new ErrorCode(1_011_004_000, "快递公司不存在");

yudao-module-mall/yudao-module-trade-biz/src/main/java/cn/iocoder/yudao/module/trade/controller/app/order/vo/AppTradeOrderSettlementRespVO.java

@@ -14,7 +14,7 @@ import java.util.List;
 public class AppTradeOrderSettlementRespVO {
 
     @Schema(description = "交易类型", requiredMode = Schema.RequiredMode.REQUIRED, example = "1") // 对应 TradeOrderTypeEnum 枚举
-    private Integer type = 1; // TODO 芋艿：改成计算
+    private Integer type;
 
     @Schema(description = "购物项数组", requiredMode = Schema.RequiredMode.REQUIRED)
     private List<Item> items;
@@ -75,6 +75,9 @@ public class AppTradeOrderSettlementRespVO {
         @Schema(description = "商品原价（总），单位：分", requiredMode = Schema.RequiredMode.REQUIRED, example = "500")
         private Integer totalPrice;
 
+        @Schema(description = "订单优惠（总），单位：分", requiredMode = Schema.RequiredMode.REQUIRED, example = "66")
+        private Integer discountPrice;
+
         @Schema(description = "运费金额，单位：分", requiredMode = Schema.RequiredMode.REQUIRED, example = "50")
         private Integer deliveryPrice;
 

yudao-module-mall/yudao-module-trade-biz/src/main/java/cn/iocoder/yudao/module/trade/convert/order/TradeOrderConvert.java

@@ -211,7 +211,8 @@ public interface TradeOrderConvert {
                 .setCouponId(settlementReqVO.getCouponId()).setPointStatus(settlementReqVO.getPointStatus())
                 .setDeliveryType(settlementReqVO.getDeliveryType()).setAddressId(settlementReqVO.getAddressId())
                 .setPickUpStoreId(settlementReqVO.getPickUpStoreId())
-                .setItems(new ArrayList<>(settlementReqVO.getItems().size()));
+                .setItems(new ArrayList<>(settlementReqVO.getItems().size()))
+                .setSeckillActivityId(settlementReqVO.getSeckillActivityId());
         // 商品项的构建
         Map<Long, CartDO> cartMap = convertMap(cartList, CartDO::getId);
         for (AppTradeOrderSettlementReqVO.Item item : settlementReqVO.getItems()) {

yudao-module-mall/yudao-module-trade-biz/src/main/java/cn/iocoder/yudao/module/trade/dal/dataobject/order/TradeOrderDO.java

@@ -288,4 +288,11 @@ public class TradeOrderDO extends BaseDO {
      */
     private Integer vipPrice;
 
+    /**
+     * 秒杀活动编号
+     *
+     * 关联 SeckillActivityDO 的 id 字段
+     */
+    private Long seckillActivityId;
+
 }

yudao-module-mall/yudao-module-trade-biz/src/main/java/cn/iocoder/yudao/module/trade/dal/mysql/order/TradeOrderItemMapper.java

@@ -1,13 +1,19 @@
 package cn.iocoder.yudao.module.trade.dal.mysql.order;
 
+import cn.hutool.core.collection.CollUtil;
+import cn.hutool.core.map.MapUtil;
 import cn.iocoder.yudao.framework.mybatis.core.mapper.BaseMapperX;
 import cn.iocoder.yudao.framework.mybatis.core.query.LambdaQueryWrapperX;
 import cn.iocoder.yudao.module.trade.dal.dataobject.order.TradeOrderItemDO;
+import com.baomidou.mybatisplus.core.conditions.query.QueryWrapper;
 import com.baomidou.mybatisplus.core.conditions.update.LambdaUpdateWrapper;
 import org.apache.ibatis.annotations.Mapper;
+import org.apache.ibatis.annotations.Param;
 
 import java.util.Collection;
 import java.util.List;
+import java.util.Map;
+import java.util.Set;
 
 @Mapper
 public interface TradeOrderItemMapper extends BaseMapperX<TradeOrderItemDO> {
@@ -38,4 +44,13 @@ public interface TradeOrderItemMapper extends BaseMapperX<TradeOrderItemDO> {
                 .eq(TradeOrderItemDO::getCommentStatus, commentStatus));
     }
 
+    default int selectProductSumByOrderId(@Param("orderIds") Set<Long> orderIds) {
+        // SQL sum 查询
+        List<Map<String, Object>> result = selectMaps(new QueryWrapper<TradeOrderItemDO>()
+                .select("SUM(count) AS sumCount")
+                .in("order_id", orderIds)); // 只计算选中的
+        // 获得数量
+        return CollUtil.getFirst(result) != null ? MapUtil.getInt(result.get(0), "sumCount") : 0;
+    }
+
 }

yudao-module-mall/yudao-module-trade-biz/src/main/java/cn/iocoder/yudao/module/trade/dal/mysql/order/TradeOrderMapper.java

@@ -82,4 +82,10 @@ public interface TradeOrderMapper extends BaseMapperX<TradeOrderDO> {
                 .eq(TradeOrderDO::getCommentStatus, commentStatus));
     }
 
+    default List<TradeOrderDO> selectListByUserIdAndSeckillActivityId(Long userId, Long seckillActivityId) {
+        return selectList(new LambdaUpdateWrapper<>(TradeOrderDO.class)
+                .eq(TradeOrderDO::getUserId, userId)
+                .eq(TradeOrderDO::getSeckillActivityId, seckillActivityId));
+    }
+
 }

yudao-module-mall/yudao-module-trade-biz/src/main/java/cn/iocoder/yudao/module/trade/service/order/TradeOrderQueryService.java

@@ -82,6 +82,15 @@ public interface TradeOrderQueryService {
      */
     List<ExpressTrackRespDTO> getExpressTrackList(Long id);
 
+    /**
+     * 【会员】在指定秒杀活动下，用户购买的商品数量
+     *
+     * @param userId 用户编号
+     * @param activityId 活动编号
+     * @return 秒杀商品数量
+     */
+    int getSeckillProductCount(Long userId, Long activityId);
+
     // =================== Order Item ===================
 
     /**

yudao-module-mall/yudao-module-trade-biz/src/main/java/cn/iocoder/yudao/module/trade/service/order/TradeOrderQueryServiceImpl.java

@@ -13,6 +13,7 @@ import cn.iocoder.yudao.module.trade.dal.dataobject.order.TradeOrderDO;
 import cn.iocoder.yudao.module.trade.dal.dataobject.order.TradeOrderItemDO;
 import cn.iocoder.yudao.module.trade.dal.mysql.order.TradeOrderItemMapper;
 import cn.iocoder.yudao.module.trade.dal.mysql.order.TradeOrderMapper;
+import cn.iocoder.yudao.module.trade.enums.order.TradeOrderStatusEnum;
 import cn.iocoder.yudao.module.trade.framework.delivery.core.client.ExpressClientFactory;
 import cn.iocoder.yudao.module.trade.framework.delivery.core.client.dto.ExpressTrackQueryReqDTO;
 import cn.iocoder.yudao.module.trade.framework.delivery.core.client.dto.ExpressTrackRespDTO;
@@ -120,6 +121,18 @@ public class TradeOrderQueryServiceImpl implements TradeOrderQueryService {
         return getExpressTrackList(order);
     }
 
+    @Override
+    public int getSeckillProductCount(Long userId, Long activityId) {
+        // 获得订单列表
+        List<TradeOrderDO> orders = tradeOrderMapper.selectListByUserIdAndSeckillActivityId(userId, activityId);
+        orders.removeIf(order -> TradeOrderStatusEnum.isCanceled(order.getStatus())); // 过滤掉【已取消】的订单
+        if (CollUtil.isEmpty(orders)) {
+            return 0;
+        }
+        // 获得订单项列表
+        return tradeOrderItemMapper.selectProductSumByOrderId(convertSet(orders, TradeOrderDO::getId));
+    }
+
     // TODO @puhui999：可以加个 spring 缓存，30 分钟；主要考虑及时性要求不高，但是每次调用需要钱；
     /**
      * 获得订单的物流轨迹

yudao-module-mall/yudao-module-trade-biz/src/main/java/cn/iocoder/yudao/module/trade/service/price/calculator/TradeSeckillActivityPriceCalculator.java

@@ -1,19 +1,22 @@
 package cn.iocoder.yudao.module.trade.service.price.calculator;
 
+import cn.hutool.core.lang.Assert;
+import cn.hutool.core.util.StrUtil;
 import cn.iocoder.yudao.module.promotion.api.seckill.SeckillActivityApi;
-import cn.iocoder.yudao.module.promotion.api.seckill.dto.SeckillActivityProductRespDTO;
+import cn.iocoder.yudao.module.promotion.api.seckill.dto.SeckillValidateJoinRespDTO;
+import cn.iocoder.yudao.module.promotion.enums.common.PromotionTypeEnum;
+import cn.iocoder.yudao.module.trade.service.order.TradeOrderQueryService;
 import cn.iocoder.yudao.module.trade.service.price.bo.TradePriceCalculateReqBO;
 import cn.iocoder.yudao.module.trade.service.price.bo.TradePriceCalculateRespBO;
 import org.springframework.core.annotation.Order;
 import org.springframework.stereotype.Component;
 
 import javax.annotation.Resource;
-import java.util.List;
-import java.util.Map;
 
-import static cn.iocoder.yudao.framework.common.util.collection.CollectionUtils.convertMap;
-import static cn.iocoder.yudao.framework.common.util.collection.CollectionUtils.convertSet;
+import static cn.iocoder.yudao.framework.common.exception.util.ServiceExceptionUtil.exception;
+import static cn.iocoder.yudao.module.trade.enums.ErrorCodeConstants.PRICE_CALCULATE_SECKILL_TOTAL_LIMIT_COUNT;
 
+// TODO huihui：单测需要补充
 /**
  * 秒杀活动的 {@link TradePriceCalculator} 实现类
  *
@@ -24,22 +27,45 @@ import static cn.iocoder.yudao.framework.common.util.collection.CollectionUtils.
 public class TradeSeckillActivityPriceCalculator implements TradePriceCalculator {
 
     @Resource
-    private SeckillActivityApi activityApi;
+    private SeckillActivityApi seckillActivityApi;
+
+    @Resource
+    private TradeOrderQueryService tradeOrderQueryService;
 
     @Override
     public void calculate(TradePriceCalculateReqBO param, TradePriceCalculateRespBO result) {
-        // 1、判断订单类型和是否具有秒杀活动编号
+        // 1. 判断订单类型和是否具有秒杀活动编号
         if (param.getSeckillActivityId() == null) {
             return;
         }
-        // 2、获取秒杀活动商品信息
-        List<SeckillActivityProductRespDTO> productList = activityApi.getSeckillActivityProductList(param.getSeckillActivityId(), convertSet(param.getItems(),
-                TradePriceCalculateReqBO.Item::getSkuId));
-        Map<Long, SeckillActivityProductRespDTO> productMap = convertMap(productList, SeckillActivityProductRespDTO::getSkuId);
-        result.getItems().forEach(item -> {
-            SeckillActivityProductRespDTO product = productMap.get(item.getSkuId());
-            item.setActivityPrice(product.getSeckillPrice()); // 设置活动金额
-        });
+        Assert.isTrue(param.getItems().size() == 1, "秒杀时，只允许选择一个商品");
+        // 2. 校验是否可以参与秒杀
+        TradePriceCalculateRespBO.OrderItem orderItem = result.getItems().get(0);
+        SeckillValidateJoinRespDTO seckillActivity = validateJoinSeckill(
+                param.getUserId(), param.getSeckillActivityId(),
+                orderItem.getSkuId(), orderItem.getCount());
+
+        // 3.1 记录优惠明细
+        Integer discountPrice = orderItem.getPayPrice() - seckillActivity.getSeckillPrice();
+        TradePriceCalculatorHelper.addPromotion(result, orderItem,
+                param.getSeckillActivityId(), seckillActivity.getName(), PromotionTypeEnum.SECKILL_ACTIVITY.getType(),
+                StrUtil.format("秒杀活动：省 {} 元", TradePriceCalculatorHelper.formatPrice(discountPrice)),
+                discountPrice);
+        // 3.2 更新 SKU 优惠金额
+        orderItem.setDiscountPrice(orderItem.getDiscountPrice() + discountPrice);
+        TradePriceCalculatorHelper.recountPayPrice(orderItem);
+        TradePriceCalculatorHelper.recountAllPrice(result);
+    }
+
+    private SeckillValidateJoinRespDTO validateJoinSeckill(Long userId, Long activityId, Long skuId, Integer count) {
+        // 1. 校验是否可以参与秒杀
+        SeckillValidateJoinRespDTO seckillActivity = seckillActivityApi.validateJoinSeckill(activityId, skuId, count);
+        // 2. 校验总限购数量，目前只有 trade 有具体下单的数据，需要交给 trade 价格计算使用
+        int seckillProductCount = tradeOrderQueryService.getSeckillProductCount(userId, activityId);
+        if (seckillProductCount + count > seckillActivity.getTotalLimitCount()) {
+            throw exception(PRICE_CALCULATE_SECKILL_TOTAL_LIMIT_COUNT);
+        }
+        return seckillActivity;
     }
 
 }