Update app.py

app.py

@@ -53,9 +53,18 @@ document_store = {}
 def initialize_faiss():
     if os.path.exists(faiss_index_file):
         try:
-            print(f"FAISS index file {faiss_index_file} exists, attempting to load it.")
+            print(f"FAISS index file {faiss_index_file} exists, attempting to load it.") 
             index = faiss.read_index(faiss_index_file)
-            print(f"FAISS index loaded with {index.ntotal} vectors.")
+            if index.ntotal > 0:
+                print(f"FAISS index loaded with {index.ntotal} vectors.")
+                # If the index has non-zero entries, reset it
+                index.reset()  # Resetting the index if non-zero entries
+                print("Index reset. Reinitializing index.")
+                index = faiss.IndexIDMap(faiss.IndexFlatL2(384))  # Reinitialize the index
+            else:
+                print("Loaded index has zero vectors, reinitializing index.")
+                index = faiss.IndexIDMap(faiss.IndexFlatL2(384))  # Initialize with flat L2 distance
+            
         except Exception as e:
             print(f"Error loading FAISS index: {e}, reinitializing a new index.")
             index = faiss.IndexIDMap(faiss.IndexFlatL2(384))