fixes

api/endpoints/generation_router.py

@@ -9,6 +9,7 @@ from api.dependency import get_generation_service, get_project_id, get_dao
 from repos.dao import DAO
 
 from api.models.GenerationRequest import GenerationResponse, GenerationRequest, GenerationsResponse, PromptResponse, PromptRequest, GenerationGroupResponse
+from api.models.FinancialUsageDTO import FinancialReport
 from api.service.generation_service import GenerationService
 from models.Generation import Generation
 
@@ -68,6 +69,47 @@ async def get_generations(character_id: Optional[str] = None, limit: int = 10, o
     return await generation_service.get_generations(character_id, limit=limit, offset=offset, user_id=user_id_filter, project_id=project_id)
 
 
+@router.get("/usage", response_model=FinancialReport)
+async def get_usage_report(
+    breakdown: Optional[str] = None, # "user" or "project"
+    generation_service: GenerationService = Depends(get_generation_service),
+    current_user: dict = Depends(get_current_user),
+    project_id: Optional[str] = Depends(get_project_id),
+    dao: DAO = Depends(get_dao)
+) -> FinancialReport:
+    """
+    Returns usage statistics (runs, tokens, cost) for the current user or project.
+    If project_id is provided, returns stats for that project.
+    Otherwise, returns stats for the current user.
+    """
+    user_id_filter = str(current_user["_id"])
+    breakdown_by = None
+    
+    if project_id:
+        # Permission check
+        project = await dao.projects.get_project(project_id)
+        if not project or str(current_user["_id"]) not in project.members:
+             raise HTTPException(status_code=403, detail="Project access denied")
+        user_id_filter = None # If we are in project, we see stats for the WHOLE project by default
+        if breakdown == "user":
+            breakdown_by = "created_by"
+        elif breakdown == "project":
+            breakdown_by = "project_id"
+    else:
+        # Default: Stats for current user
+        if breakdown == "project":
+            breakdown_by = "project_id"
+        elif breakdown == "user":
+            # This would breakdown personal usage by user (yourself), but could be useful if it included collaborators? 
+            # No, if project_id is None, it's personal.
+            breakdown_by = "created_by"
+
+    return await generation_service.get_financial_report(
+        user_id=user_id_filter, 
+        project_id=project_id, 
+        breakdown_by=breakdown_by
+    )
+
 @router.post("/_run", response_model=GenerationGroupResponse)
 async def post_generation(generation: GenerationRequest, request: Request,
                           generation_service: GenerationService = Depends(get_generation_service),