Update app.py

app.py

@@ -1,3 +1,5 @@
+from typing import List, Tuple
+
 def generate_response(
     user_input: str, 
     history: List[Tuple[str, str]], 
@@ -20,8 +22,13 @@ def generate_response(
     try:
         # Build the message list with system message and history
         messages = [{"role": "system", "content": SYSTEM_MESSAGE}]
-        messages.extend([{"role": "user" if i % 2 == 0 else "assistant", "content": val} 
-                         for i, val in enumerate(sum(history, ()))]) 
+        
+        # Iterate through the history list and format accordingly
+        for user_message, assistant_message in history:
+            messages.append({"role": "user", "content": user_message})
+            messages.append({"role": "assistant", "content": assistant_message})
+        
+        # Add the current user input
         messages.append({"role": "user", "content": user_input})
 
         # Generate response from the model
@@ -46,5 +53,6 @@ def generate_response(
         return response or "Sorry, I couldn't generate a response. Please try again."
 
     except Exception as e:
+        # Log the error for debugging purposes
         print(f"An error occurred: {e}")
         return "Error: An unexpected error occurred while processing your request."