Upload gradio_interface.py

src/gradio_interface.py

@@ -426,7 +426,14 @@ class GradioInterfaceBuilder:
         gr.Markdown("## 📝 Test Your Understanding of Mercedes E-class ADAS")
         gr.Markdown("Select a topic to test your knowledge with multiple-choice questions based on Bloom's taxonomy levels.")
         
-        topic_files = self.rag_engine.get_files_from_vector_store()
+        # Use default files instead of calling API during interface creation
+        # This avoids blocking during initialization
+        default_files = [
+            "Function of Active Distance Assist DISTRONIC.pdf",
+            "Function of Active Lane Change Assist.pdf",
+            "Function of Active Steering Assist.pdf",
+            "Function of Active Stop-and-Go Assist.pdf"
+        ]
         
         with gr.Row():
             test_questions = gr.State(None)
@@ -436,13 +443,34 @@ class GradioInterfaceBuilder:
             
             topic_dropdown = gr.Dropdown(
                 label="Select a Topic",
-                choices=topic_files,
-                value=topic_files[0] if topic_files else None,
+                choices=default_files,
+                value=default_files[0] if default_files else None,
                 interactive=True
             )
             
+            # Add a button to refresh files from vector store (lazy loading)
+            refresh_files_btn = gr.Button("🔄 Refresh Topic List", variant="secondary", size="sm")
+            
             start_test_btn = gr.Button("Start Test", variant="primary")
         
+        # Function to refresh files from vector store (called when button is clicked)
+        def refresh_topic_list():
+            try:
+                topic_files = self.rag_engine.get_files_from_vector_store()
+                if topic_files:
+                    return gr.Dropdown.update(choices=topic_files, value=topic_files[0] if topic_files else None)
+                else:
+                    return gr.Dropdown.update(choices=default_files, value=default_files[0] if default_files else None)
+            except Exception as e:
+                print(f"⚠️ Error refreshing files: {e}")
+                return gr.Dropdown.update(choices=default_files, value=default_files[0] if default_files else None)
+        
+        refresh_files_btn.click(
+            fn=refresh_topic_list,
+            inputs=None,
+            outputs=topic_dropdown
+        )
+        
         # Progress indicator
         with gr.Column(visible=False) as progress_container:
             progress_html = gr.HTML()