Update api.py

api.py

@@ -61,15 +61,28 @@ app = Flask(__name__)
 CORS(app, resources={r"/ask": {"origins": "*"}})
 
 # ---------- OpenAI Client ----------
+import openai
+
 client = None
-if OPENAI_API_KEY:
+try:
+    if not OPENAI_API_KEY or OPENAI_API_KEY.strip() == "":
+        raise ValueError("Missing OPENAI_API_KEY in environment variables")
+
+    # Handle both old and new SDK structures safely
     try:
-        client = OpenAI(api_key=OPENAI_API_KEY)
-        print("✅ OpenAI client initialized successfully.")
-    except Exception as e:
-        print("❌ Failed to initialize OpenAI client:", e)
-else:
-    print("⚠️  OPENAI_API_KEY is missing in .env")
+        # New SDK style
+        client = openai.OpenAI(api_key=OPENAI_API_KEY)
+        print("✅ Using new OpenAI client interface.")
+    except Exception:
+        # Fallback to legacy interface
+        openai.api_key = OPENAI_API_KEY
+        client = openai
+        print("✅ Using legacy OpenAI interface.")
+
+except Exception as e:
+    client = None
+    print(f"❌ Failed to initialize OpenAI client: {e}")
+
 
 # ---------- Retriever ----------
 retriever = None