fixes

api/service/generation_service.py

@@ -13,6 +13,7 @@ from aiogram.types import BufferedInputFile
 from adapters.Exception import GoogleGenerationException
 from adapters.google_adapter import GoogleAdapter
 from api.models.GenerationRequest import GenerationRequest, GenerationResponse, GenerationsResponse, GenerationGroupResponse
+from api.models.FinancialUsageDTO import FinancialReport, UsageStats, UsageByEntity
 # Импортируйте ваши модели DAO, Asset, Generation корректно
 from models.Asset import Asset, AssetType, AssetContentType
 from models.Generation import Generation, GenerationStatus
@@ -506,4 +507,29 @@ class GenerationService:
                 logger.info(f"Purged {purged} assets (soft-deleted + S3 files removed).")
             
         except Exception as e:
-            logger.error(f"Error during old data cleanup: {e}")
+            logger.error(f"Error during old data cleanup: {e}")
+
+    async def get_financial_report(self, user_id: Optional[str] = None, project_id: Optional[str] = None, breakdown_by: Optional[str] = None) -> FinancialReport:
+        """
+        Generates a financial usage report for a specific user or project.
+        'breakdown_by' can be 'created_by' or 'project_id'.
+        """
+        summary_data = await self.dao.generations.get_usage_stats(created_by=user_id, project_id=project_id)
+        summary = UsageStats(**summary_data)
+        
+        by_user = None
+        by_project = None
+        
+        if breakdown_by == "created_by":
+            res = await self.dao.generations.get_usage_breakdown(group_by="created_by", project_id=project_id, created_by=user_id)
+            by_user = [UsageByEntity(**item) for item in res]
+            
+        if breakdown_by == "project_id":
+             res = await self.dao.generations.get_usage_breakdown(group_by="project_id", project_id=project_id, created_by=user_id)
+             by_project = [UsageByEntity(**item) for item in res]
+             
+        return FinancialReport(
+            summary=summary,
+            by_user=by_user,
+            by_project=by_project
+        )