Make ChatGPT base_url configurable (#73)

* Add configurable base_url

* Conditionally exclude a parameter if Gemini is the model

Sorry for the delay on this... The readme and help texts need updating, maybe few tweaks here and there, but obviously I never got around to it personally, and this is still a great addition, so going to just commit as is for now since you were thoughtful enough to make sure it doesn't break anything. Thanks again.

ChatGPT/config.py

@@ -74,6 +74,19 @@ conf.registerGlobalValue(
     ),
 )
 
+conf.registerGlobalValue(
+    ChatGPT,
+    "base_url",
+    registry.String(
+        "https://api.openai.com/v1/",
+        _(
+            """
+            API server, for using a non-OpenAI model which has a compatible API, default: "https://api.openai.com/v1/"
+            """
+        ),
+    ),
+)
+
 conf.registerChannelValue(
     ChatGPT,
     "prompt",
@@ -100,6 +113,7 @@ conf.registerChannelValue(
     ),
 )
 
+
 conf.registerChannelValue(
     ChatGPT,
     "reply_intact",

ChatGPT/plugin.py

@@ -32,7 +32,8 @@ from supybot import utils, plugins, ircutils, callbacks
 from supybot.commands import *
 from supybot.i18n import PluginInternationalization
 import re
-import openai
+#import openai
+from openai import OpenAI
 
 
 _ = PluginInternationalization("ChatGPT")
@@ -57,26 +58,41 @@ class ChatGPT(callbacks.Plugin):
             return
         if self.registryValue("nick_include", msg.channel):
             text = "%s: %s" % (msg.nick, text)
+            
+        # Initialize client
+        client = OpenAI(
+            api_key=self.registryValue("api_key"),
+            base_url=self.registryValue("base_url")
+        )
         self.history.setdefault(channel, None)
         max_history = self.registryValue("max_history", msg.channel)
         prompt = self.registryValue("prompt", msg.channel).replace("$botnick", irc.nick)
+        
         if not self.history[channel] or max_history < 1:
             self.history[channel] = []
-        openai.api_key = self.registryValue("api_key")
-        completion = openai.chat.completions.create(
-            model=self.registryValue("model", msg.channel),
-            messages=self.history[channel][-max_history:]
-            + [
+        
+        model_name = self.registryValue("model", msg.channel)
+        
+        # Base request parameters
+        request_params = {
+            "model": model_name,
+            "messages": self.history[channel][-max_history:] + [
                 {"role": "system", "content": prompt},
-                {"role": "user", "content": text},
+                {"role": "user", "content": text}
             ],
-            temperature=self.registryValue("temperature", msg.channel),
-            top_p=self.registryValue("top_p", msg.channel),
-            max_tokens=self.registryValue("max_tokens", msg.channel),
-            presence_penalty=self.registryValue("presence_penalty", msg.channel),
-            frequency_penalty=self.registryValue("frequency_penalty", msg.channel),
-            user=msg.nick,
-        )
+            "temperature": self.registryValue("temperature", msg.channel),
+            "top_p": self.registryValue("top_p", msg.channel),
+            "max_tokens": self.registryValue("max_tokens", msg.channel),
+            "presence_penalty": self.registryValue("presence_penalty", msg.channel),
+            "user": msg.nick,
+        }
+        
+        # Gemini models fail if frequency_penalty is included
+        if "gemini" not in model_name.lower():
+            request_params["frequency_penalty"] = self.registryValue("frequency_penalty", msg.channel)
+        
+        completion = client.chat.completions.create(**request_params)
+
         if self.registryValue("nick_strip", msg.channel):
             content = re.sub(
                 r"^%s: " % (irc.nick), "", completion.choices[0].message.content