app.py

import gradio as gr
from huggingface_hub import InferenceClient
import os
import requests

# Set up the inference API client
hf_client = InferenceClient("mistralai/Mistral-7B-Instruct-v0.3", token=os.getenv("HF_TOKEN"))

def respond(
    message,
    history: list[tuple[str, str]],
    system_message,
    max_tokens,
    temperature,
    top_p,
):
    system_prefix = """
If the input language is Korean, respond in Korean. If it's English, respond in English.
Do not output in both languages simultaneously. Always respond in Korean to Korean questions and in English to English questions.
    """
    
    messages = [{"role": "system", "content": f"{system_prefix} {system_message}"}]

    # Ensure alternating user/assistant messages
    for user_msg, assistant_msg in history:
        messages.append({"role": "user", "content": user_msg})
        if assistant_msg:  # Only add assistant message if it exists
            messages.append({"role": "assistant", "content": assistant_msg})

    # Add the current user message
    messages.append({"role": "user", "content": message})

    response = ""

    try:
        for message in hf_client.chat_completion(
            messages,
            max_tokens=max_tokens,
            stream=True,
            temperature=temperature,
            top_p=top_p,
        ):
            token = message.choices[0].delta.content
            if token is not None:
                response += token.strip("")
            yield response
    except Exception as e:
        yield f"An error occurred: {str(e)}"


theme = "Nymbo/Nymbo_Theme"

css = """
footer {
    visibility: hidden;
}
"""

demo = gr.ChatInterface(
    respond,
    additional_inputs=[
        gr.Textbox(value="""
You are an AI assistant.
""", label="System Prompt"),
        gr.Slider(minimum=1, maximum=2000, value=512, step=1, label="Max new tokens"),
        gr.Slider(minimum=0.1, maximum=4.0, value=0.7, step=0.1, label="Temperature"),
        gr.Slider(
            minimum=0.1,
            maximum=1.0,
            value=0.95,
            step=0.05,
            label="Top-p (nucleus sampling)",
        ),
    ],
    theme=theme,  # Apply theme
    css=css  # Apply CSS
)

if __name__ == "__main__":
    demo.launch()