Update app.py

app.py

@@ -25,7 +25,20 @@ def init_exam(api_key: str):
         return [{"role": "assistant", "content": opening}], gr.update(interactive=True)
     except Exception as e:
         _agent = None
-        return [{"role": "assistant", "content": f"Error initialising agent: {e}"}], gr.update(interactive=False)
+        err = str(e)
+        if "401" in err or "invalid_api_key" in err or "Invalid API Key" in err:
+            msg = "Invalid API key. Please check your Groq API key at console.groq.com and try again."
+        elif "429" in err or "rate_limit" in err:
+            msg = "Rate limit reached. Your daily token quota is exhausted. Please wait until tomorrow or upgrade your Groq plan."
+        elif "403" in err:
+            msg = "Access denied. Your API key does not have permission to use this model."
+        elif "404" in err:
+            msg = "Model not found. Please contact support."
+        elif "connection" in err.lower() or "timeout" in err.lower():
+            msg = "Connection error. Please check your internet connection and try again."
+        else:
+            msg = f"Error: {e}"
+        return [{"role": "assistant", "content": msg}], gr.update(interactive=False)
 
 
 def user_message(message: str, history: list):
@@ -53,7 +66,15 @@ def user_message(message: str, history: list):
     try:
         reply = _agent.chat(message)
     except Exception as e:
-        reply = f"Agent error: {e}"
+        err = str(e)
+        if "429" in err or "rate_limit" in err:
+            reply = "Rate limit reached. Daily quota exhausted — please try again tomorrow."
+        elif "401" in err or "invalid_api_key" in err:
+            reply = "Invalid API key. Please restart and enter a valid Groq key."
+        elif "connection" in err.lower() or "timeout" in err.lower():
+            reply = "Connection error. Please check your internet and try again."
+        else:
+            reply = f"Agent error: {e}"
 
     history = history + [{"role": "assistant", "content": reply}]
     return history, ""