Switch to DialoGPT-large and add better logging

app.py

@@ -86,7 +86,7 @@ class TextilindoAI:
     def __init__(self):
         self.api_key = os.getenv('HUGGINGFACE_API_KEY')
         # Use Llama model for better performance
-        self.model = os.getenv('DEFAULT_MODEL', 'meta-llama/Llama-2-7b-chat-hf')
+        self.model = os.getenv('DEFAULT_MODEL', 'microsoft/DialoGPT-large')
         self.system_prompt = self.load_system_prompt()
         
         if not self.api_key:
@@ -155,6 +155,9 @@ Minimum purchase is 1 roll (67-70 yards)."""
                 # For other models, use the full prompt
                 prompt = f"<|system|>\n{self.system_prompt}\n<|user|>\n{user_message}\n<|assistant|>\n"
             
+            logger.info(f"Using model: {self.model}")
+            logger.info(f"API Key present: {bool(self.api_key)}")
+            
             logger.info(f"Generating response for prompt: {prompt[:100]}...")
             
             # Generate response with model-specific parameters