[GPT] handle custom url

Services/Services_bases/gpt_service/gpt.py

@@ -29,6 +29,7 @@
 import octobot_commons.time_frame_manager as time_frame_manager
 import octobot_commons.authentication as authentication
 import octobot_commons.tree as tree
+import octobot_commons.configuration.fields_utils as fields_utils
 
 import octobot.constants as constants
 import octobot.community as community
@@ -46,13 +47,15 @@ def get_fields_description(self):
         if self._env_secret_key is None:
             return {
                 services_constants.CONIG_OPENAI_SECRET_KEY: "Your openai API secret key",
+                services_constants.CONIG_LLM_CUSTOM_BASE_URL: "Custom LLM base url to use. Leave empty to use openai.com",
             }
         return {}
 
     def get_default_value(self):
         if self._env_secret_key is None:
             return {
                 services_constants.CONIG_OPENAI_SECRET_KEY: "",
+                services_constants.CONIG_LLM_CUSTOM_BASE_URL: "",
             }
         return {}
 
@@ -104,7 +107,10 @@ async def get_chat_completion(
         return await self._get_signal_from_gpt(messages, model, max_tokens, n, stop, temperature)
 
     def _get_client(self) -> openai.AsyncOpenAI:
-        return openai.AsyncOpenAI(api_key=self._get_api_key())
+        return openai.AsyncOpenAI(
+            api_key=self._get_api_key(),
+            base_url=self._get_base_url(),
+        )
 
     async def _get_signal_from_gpt(
         self,
@@ -128,7 +134,10 @@ async def _get_signal_from_gpt(
             )
             self._update_token_usage(completions.usage.total_tokens)
             return completions.choices[0].message.content
-        except openai.BadRequestError as err:
+        except (
+            openai.BadRequestError, # error in request
+            openai.UnprocessableEntityError # error in model (ex: model not found)
+        )as err:
             raise errors.InvalidRequestError(
                 f"Error when running request with model {model} (invalid request): {err}"
             ) from err
@@ -315,6 +324,14 @@ def _get_api_key(self):
                 services_constants.CONIG_OPENAI_SECRET_KEY
             ]
 
+    def _get_base_url(self):
+        value = self.config[services_constants.CONFIG_CATEGORY_SERVICES][services_constants.CONFIG_GPT].get(
+            services_constants.CONIG_LLM_CUSTOM_BASE_URL
+        )
+        if fields_utils.has_invalid_default_config_value(value):
+            return None
+        return value or None
+
     async def prepare(self) -> None:
         try:
             if self.use_stored_signals_only():
@@ -323,8 +340,12 @@ async def prepare(self) -> None:
             fetched_models = await self._get_client().models.list()
             self.models = [d.id for d in fetched_models.data]
             if self.model not in self.models:
-                self.logger.warning(f"Warning: selected '{self.model}' model is not in GPT available models. "
-                                    f"Available models are: {self.models}")
+                self.logger.warning(
+                    f"Warning: the default '{self.model}' model is not in available LLM models from the "
+                    f"selected LLM provider. "
+                    f"Available models are: {self.models}. Please select an available model when configuring your "
+                    f"evaluators."
+                )
         except openai.AuthenticationError as err:
             self.logger.error(f"Invalid OpenAI api key: {err}")
             self.creation_error_message = err