Update llm_app.py

llm_app.py

@@ -83,6 +83,14 @@ class LLMCurriculumAssistant:
             self.deepseek_api_key = os.environ.get("DEEPSEEK_API_KEY")
             self.deepseek_base_url = "https://api.deepseek.com/v1/chat/completions"
             
+            # Check if API key is available
+            if not self.deepseek_api_key:
+                print("❌ DEEPSEEK_API_KEY not found in environment variables")
+                print("Please set your DeepSeek API key as a HuggingFace secret named 'DEEPSEEK_API_KEY'")
+                raise Exception("DeepSeek API key not found")
+            
+            print(f"✅ DeepSeek API key found: {self.deepseek_api_key[:20]}...")
+            
             # Create content selection prompt
             content_selection_template = """Hi! I'm helping a student find the best curriculum slide for their question. 
 
@@ -206,8 +214,16 @@ Thanks for your help! Here's what I'd tell the student:"""
                 }
                 
                 response = requests.post(self.deepseek_base_url, headers=headers, json=data)
-                response.raise_for_status()
                 
+                if response.status_code == 401:
+                    print("❌ DeepSeek API key is invalid or expired")
+                    print("Please check your DeepSeek API key in HuggingFace secrets")
+                    raise Exception("Invalid DeepSeek API key")
+                elif response.status_code != 200:
+                    print(f"❌ DeepSeek API error: {response.status_code} - {response.text}")
+                    raise Exception(f"DeepSeek API error: {response.status_code}")
+                
+                response.raise_for_status()
                 selection_response = response.json()["choices"][0]["message"]["content"]
                 print(f"DeepSeek Selection Response: {selection_response}")
                 
@@ -269,8 +285,16 @@ Thanks for your help! Here's what I'd tell the student:"""
                 }
                 
                 response = requests.post(self.deepseek_base_url, headers=headers, json=data)
-                response.raise_for_status()
                 
+                if response.status_code == 401:
+                    print("❌ DeepSeek API key is invalid or expired")
+                    print("Please check your DeepSeek API key in HuggingFace secrets")
+                    raise Exception("Invalid DeepSeek API key")
+                elif response.status_code != 200:
+                    print(f"❌ DeepSeek API error: {response.status_code} - {response.text}")
+                    raise Exception(f"DeepSeek API error: {response.status_code}")
+                
+                response.raise_for_status()
                 answer = response.json()["choices"][0]["message"]["content"].strip()
                 print(f"✅ DeepSeek answer generated: {answer[:100]}...")