Free rooms doesn't cause errors but further data verification is necessary

src/alpine_bits_python/free_rooms_action.py

@@ -229,6 +229,16 @@ class FreeRoomsAction(AlpineBitsAction):
                 HttpStatusCode.BAD_REQUEST,
             )
 
+        # Special case: CompleteSet with single empty Inventory element to reset all availability
+        if (
+            update_type == "CompleteSet"
+            and len(inventories) == 1
+            and inventories[0].status_application_control is None
+            and inventories[0].inv_counts is None
+        ):
+            # This is valid - it's a reset request
+            return
+
         encountered_standard = False
         has_categories = False  # Tracks if we've seen category reports (no InvCode)
         has_rooms = False  # Tracks if we've seen individual room reports (with InvCode)
@@ -315,7 +325,10 @@ class FreeRoomsAction(AlpineBitsAction):
         self._validate_request(request, update_type, enforce_closing_order=True)
 
         # Only delete if validation passes
+        # Delete availability data for all FreeRooms-sourced inventory
         await self._delete_existing_availability(session, hotel.hotel_id)
+        # Delete stale inventory items that are sourced from FreeRooms
+        await self._delete_existing_inventory(session, hotel.hotel_id)
 
         # Process the validated request
         await self._process_inventories(
@@ -343,11 +356,29 @@ class FreeRoomsAction(AlpineBitsAction):
         session: AsyncSession,
         hotel_id: str,
     ) -> None:
+        """Delete all room availability data for a hotel (regardless of source)."""
         subquery = select(HotelInventory.id).where(HotelInventory.hotel_id == hotel_id)
         await session.execute(
             delete(RoomAvailability).where(RoomAvailability.inventory_id.in_(subquery))
         )
 
+    async def _delete_existing_inventory(
+        self,
+        session: AsyncSession,
+        hotel_id: str,
+    ) -> None:
+        """Delete inventory items sourced from FreeRooms.
+
+        This preserves inventory items from other sources (e.g., HotelInventory endpoint)
+        as they are not managed by FreeRooms and should persist across CompleteSet updates.
+        """
+        await session.execute(
+            delete(HotelInventory).where(
+                HotelInventory.hotel_id == hotel_id,
+                HotelInventory.source == SOURCE_FREEROOMS,
+            )
+        )
+
     async def _process_inventories(
         self,
         session: AsyncSession,