app.py

import os
import openai
import gradio as gr

# Retrieve OpenAI API key from Hugging Face Secrets
openai_api_key = os.getenv("OPENAI_API_KEY")

def chatbot(user_input, history=[]):
    if not openai_api_key:
        return "⚠️ API key is missing. Please configure it in Hugging Face Secrets.", history

    history.append({"role": "user", "content": user_input})

    try:
        response = openai.ChatCompletion.create(
            model="gpt-4o",
            messages=history,
            temperature=0.7,
            max_tokens=200,
            top_p=1,
            api_key=openai_api_key  # Explicitly passing API key
        )

        bot_reply = response["choices"][0]["message"]["content"]
        history.append({"role": "assistant", "content": bot_reply})

    except Exception as e:
        bot_reply = f"❌ Error: {str(e)}"
    
    return bot_reply, history

# Gradio Interface
chatbot_ui = gr.ChatInterface(
    fn=chatbot,
    title="AI Chatbot",
    description="A simple chatbot powered by GPT-4o.",
    theme="soft",
    retry_btn="🔄 Retry",
    undo_btn="↩️ Undo",
    clear_btn="🗑️ Clear"
)

# Launch the app
if __name__ == "__main__":
    chatbot_ui.launch()