Update app.py

app.py

@@ -151,13 +151,15 @@ st.write("📂 **Vector Store Created:**", st.session_state.vector_created)
 
 
 # ----------------- Query Input -----------------
-query = ""
-# Ensure the query input appears ONLY after the document is fully processed
+query = None  
+
+# Show input box ONLY when processing is fully done
 if st.session_state.pdf_loaded and st.session_state.chunked and st.session_state.vector_created:
     query = st.text_input("🔍 Ask a question about the document:")
-else:
-    st.info("📥 Please wait for the PDF to be processed before asking a question.")
-
+    
+elif not st.session_state.pdf_path:
+    st.info("⬆️ Please upload or provide a PDF URL first.")  # Show only if no PDF is provided
+    
 if query:
     with st.spinner("🔄 Retrieving relevant context..."):
         retriever = st.session_state.vector_store.as_retriever(search_type="similarity", search_kwargs={"k": 4})