fix base url for vertex provider

app/services/providers/vertex_adapter.py

@@ -46,6 +46,18 @@ def parse_config(self, config: dict[str, str] | None):
         self.validate_config(config)
         self.publisher = config.get("publisher", "anthropic").lower()
         self.location = config["location"].lower()
+
+        # ------------------------------------------------------------------
+        # Build the Vertex API endpoint based on the location.
+        # If the location is "global", use the default domain without the
+        # region prefix. Otherwise, prefix the domain with the region.
+        #   global   -> https://aiplatform.googleapis.com
+        #   us-east1 -> https://us-east1-aiplatform.googleapis.com
+        # ------------------------------------------------------------------
+        if self.location == "global":
+            self._base_url = "https://aiplatform.googleapis.com"
+        else:
+            self._base_url = f"https://{self.location}-aiplatform.googleapis.com"
 
     @staticmethod
     def validate_api_key(api_key: str):

tests/unit_tests/test_vertex_adapter.py

@@ -0,0 +1,13 @@
+from app.services.providers.vertex_adapter import VertexAdapter
+
+
+def test_vertex_adapter_base_url_global():
+    config = {"publisher": "anthropic", "location": "global"}
+    adapter = VertexAdapter("vertex", None, config)
+    assert adapter._base_url == "https://aiplatform.googleapis.com"
+
+
+def test_vertex_adapter_base_url_region():
+    config = {"publisher": "anthropic", "location": "us-east1"}
+    adapter = VertexAdapter("vertex", None, config)
+    assert adapter._base_url == "https://us-east1-aiplatform.googleapis.com"