refactor: centralize model configuration and improve management

app.py

@@ -12,10 +12,23 @@ import tempfile
 import shlex
 import shutil
 
-HF_API_KEY = os.environ["HF_TOKEN"]
-DEEPSEEK_API_KEY = os.environ["DEEPSEEK_API_KEY"]
-
-client = OpenAI(base_url="https://api-inference.huggingface.co/v1/", api_key=HF_API_KEY)
+# Supported models configuration
+MODELS = {
+    "Qwen/Qwen2.5-Coder-32B-Instruct": {
+        "base_url": "https://api-inference.huggingface.co/v1/",
+        "env_key": "HF_TOKEN"
+    },
+    "deepseek-ai/DeepSeek-V3": {
+        "base_url": "https://api.deepseek.com/v1",
+        "env_key": "DEEPSEEK_API_KEY"
+    }
+}
+
+# Initialize client with first available model
+client = OpenAI(
+    base_url=next(iter(MODELS.values()))["base_url"],
+    api_key=os.environ[next(iter(MODELS.values()))["env_key"]]
+)
 
 allowed_medias = [
     ".png",
@@ -154,14 +167,13 @@ YOUR FFMPEG COMMAND:
             print(msg["content"])
         print("=====================\n")
 
-        if model_choice == "deepseek-ai/DeepSeek-V3":
-            client.base_url = "https://api.deepseek.com/v1"
-            client.api_key = DEEPSEEK_API_KEY
-            model = "deepseek-chat"
-        else:
-            client.base_url = "https://api-inference.huggingface.co/v1/"
-            client.api_key = HF_API_KEY
-            model = "Qwen/Qwen2.5-Coder-32B-Instruct"
+        if model_choice not in MODELS:
+            raise ValueError(f"Model {model_choice} is not supported")
+            
+        model_config = MODELS[model_choice]
+        client.base_url = model_config["base_url"]
+        client.api_key = os.environ[model_config["env_key"]]
+        model = "deepseek-chat" if "deepseek" in model_choice.lower() else model_choice
 
         completion = client.chat.completions.create(
             model=model,