feat(ai-cam): 实现AI相机免费照片赠送逻辑

- 新增统计免费关联记录数的Mapper方法
- 在AppAiCamServiceImpl中注入ScenicRepository依赖
- 删除旧关系前查询已有免费记录避免重复赠送
- 根据景区配置获取免费照片数量
- 随机选择免费照片并标记为免费状态
- 保留已存在的免费照片记录
- 更新日志记录以区分普通和免费照片数量

src/main/java/com/ycwl/basic/mapper/SourceMapper.java

@@ -165,4 +165,12 @@ public interface SourceMapper {
      * @return 删除的记录数
      */
     int deleteRelationsByFaceIdAndType(Long faceId, Integer type);
+
+    /**
+     * 统计指定faceId和type的免费关联记录数
+     * @param faceId 人脸ID
+     * @param type 素材类型
+     * @return 免费记录数
+     */
+    int countFreeRelationsByFaceIdAndType(Long faceId, Integer type);
 }

src/main/java/com/ycwl/basic/service/mobile/impl/AppAiCamServiceImpl.java

@@ -56,6 +56,7 @@ public class AppAiCamServiceImpl implements AppAiCamService {
     private final FaceService faceService;
     private final FaceDetectLogAiCamService faceDetectLogAiCamService;
     private final ScenicService scenicService;
+    private final ScenicRepository scenicRepository;
 
     @Override
     public List<GoodsDetailVO> getAiCamGoodsByFaceId(Long faceId) {
@@ -268,10 +269,48 @@ public class AppAiCamServiceImpl implements AppAiCamService {
             throw new IllegalArgumentException("Face未关联会员: faceId=" + faceId);
         }
 
+        // 在删除之前，先查询已有的免费记录
+        List<MemberSourceEntity> existingFreeRelations = sourceMapper.listByFaceRelation(faceId, AI_CAM_SOURCE_TYPE);
+        Set<Long> existingFreeSourceIds = existingFreeRelations.stream()
+            .filter(r -> r.getIsFree() != null && r.getIsFree() == 1)
+            .map(MemberSourceEntity::getSourceId)
+            .collect(Collectors.toSet());
+        boolean hasGivenFree = !existingFreeSourceIds.isEmpty();
+
         // 删除该faceId对应的旧的type=3关系
         int deleted = sourceMapper.deleteRelationsByFaceIdAndType(faceId, AI_CAM_SOURCE_TYPE);
         log.info("删除faceId={}的旧AI相机关联记录: {}条", faceId, deleted);
 
+        // 获取景区配置中的免费照片数量
+        int freePhotoCount = 0;
+        if (!hasGivenFree) {
+            try {
+                com.ycwl.basic.integration.common.manager.ScenicConfigManager configManager =
+                    scenicRepository.getScenicConfigManager(face.getScenicId());
+                if (configManager != null) {
+                    Integer aiCamFreeNum = configManager.getInteger("ai_cam_free_num");
+                    if (aiCamFreeNum != null && aiCamFreeNum > 0) {
+                        freePhotoCount = aiCamFreeNum;
+                        log.info("景区{}配置免费赠送{}张AI相机照片", face.getScenicId(), freePhotoCount);
+                    }
+                }
+            } catch (Exception e) {
+                log.error("获取景区配置失败", e);
+            }
+        }
+
+        // 如果需要赠送免费照片，随机选择
+        Set<Long> freeSourceIds = new HashSet<>(existingFreeSourceIds);
+        if (!hasGivenFree && freePhotoCount > 0) {
+            List<Long> shuffledIds = new ArrayList<>(sourceIds);
+            Collections.shuffle(shuffledIds);
+            int actualFreeCount = Math.min(freePhotoCount, shuffledIds.size());
+            freeSourceIds.addAll(shuffledIds.subList(0, actualFreeCount));
+            log.info("为faceId={}随机赠送{}张免费照片", faceId, actualFreeCount);
+        } else if (hasGivenFree) {
+            log.info("faceId={}已赠送过免费照片，保留{}张原有免费照片", faceId, existingFreeSourceIds.size());
+        }
+
         // 构建MemberSourceEntity列表
         List<MemberSourceEntity> relations = sourceIds.stream().map(sourceId -> {
             MemberSourceEntity entity = new MemberSourceEntity();
@@ -281,13 +320,13 @@ public class AppAiCamServiceImpl implements AppAiCamService {
             entity.setSourceId(sourceId);
             entity.setType(AI_CAM_SOURCE_TYPE);
             entity.setIsBuy(0);
-            entity.setIsFree(0);
+            entity.setIsFree(freeSourceIds.contains(sourceId) ? 1 : 0);
             return entity;
         }).collect(Collectors.toList());
 
         // 批量插入
         int inserted = sourceMapper.addRelations(relations);
-        log.info("为faceId={}添加新AI相机关联记录: {}条", faceId, inserted);
+        log.info("为faceId={}添加新AI相机关联记录: {}条 (其中免费: {}张)", faceId, inserted, freeSourceIds.size());
 
         return inserted;
     }

src/main/resources/mapper/SourceMapper.xml

@@ -507,4 +507,9 @@
         DELETE FROM member_source
         WHERE face_id = #{faceId} AND `type` = #{type}
     </delete>
+
+    <select id="countFreeRelationsByFaceIdAndType" resultType="int">
+        SELECT COUNT(*) FROM member_source
+        WHERE face_id = #{faceId} AND `type` = #{type} AND is_free = 1
+    </select>
 </mapper>