feat: implement backend API clients for multi-marketplace integration and frontend service layer

backend/test_ozon_api.py

@@ -0,0 +1,54 @@
+import os
+import sys
+from dotenv import load_dotenv
+
+# Add parent dir to path so we can import backend packages
+sys.path.append(os.path.dirname(os.path.dirname(os.path.abspath(__file__))))
+
+from backend.ozon_api import OzonAPI
+from backend.ozon_api.exceptions import OzonAPIError
+
+def test_ozon_api():
+    # Load environment variables
+    env_path = os.path.join(os.path.dirname(__file__), '.env')
+    load_dotenv(env_path)
+    
+    # Check if keys are loaded
+    client_id = os.getenv('OZON_CLIENT_ID')
+    api_key = os.getenv('OZON_API_KEY')
+    
+    if not client_id or not api_key:
+        print("Error: OZON_CLIENT_ID and OZON_API_KEY must be in backend/.env")
+        return
+
+    print(f"Initializing OzonAPI with Client-ID: {client_id}")
+    api = OzonAPI()
+    
+    try:
+        # Test 1: Get products
+        print("\n--- Testing Products ---")
+        products_response = api.products.get_list(limit=5)
+        print("Success! Response keys:", products_response.keys())
+        
+        # Ozon wraps responses in 'result'
+        result = products_response.get("result", {})
+        items = result.get("items", [])
+        print(f"Found {len(items)} products.")
+        
+        if items:
+            product_id = items[0].get("product_id")
+            offer_id = items[0].get("offer_id")
+            print(f"First product - Product ID: {product_id}, Offer ID: {offer_id}")
+            
+            # Test 2: Get specific product info
+            print("\n--- Testing Product Info ---")
+            info = api.products.get_info(product_id=product_id)
+            print("Product Info Name:", info.get("result", {}).get("name", "Unknown"))
+            
+    except OzonAPIError as e:
+        print(f"API Error: {e}")
+    except Exception as e:
+        print(f"Unexpected Error: {e}")
+
+if __name__ == '__main__':
+    test_ozon_api()