import spaces
import gradio as gr
import torch
import subprocess
import requests
from gradio import State

# Function to start the ochat server
@spaces.GPU
def start_ochat_server():
    print(f"Is CUDA available: {torch.cuda.is_available()}")
    print(f"CUDA device: {torch.cuda.get_device_name(torch.cuda.current_device())}")

    command = [
        "python", "-m", "ochat.serving.openai_api_server", 
        "--model", "openchat/openchat_3.5"
    ]

    # Start the server in a separate process
    try:
        subprocess.Popen(command)
        return "ochat server started successfully"
    except Exception as e:
        return f"Failed to start ochat server: {e}"

start_ochat_server()

def user(message, history):
    return "", history + [[message, None]]


def bot(history):
    return chat_with_ochat(history[-1][0]), history + [[None, chat_with_ochat(history[-1][0])]]

# Function to send a message to the ochat server and get a response
def chat_with_ochat(message):
    url = "http://0.0.0.0:18888/v1/chat/completions"
    headers = {"Content-Type": "application/json"}
    data = {
        "model": "openchat_3.5",
        "messages": [{"role": "user", "content": message}]
    }

    try:
        response = requests.post(url, json=data, headers=headers)
        if response.status_code == 200:
            return response.json()['choices'][0]['message']['content']
        else:
            return f"Error: Server responded with status code {response.status_code}"
    except requests.RequestException as e:
        return f"Error: {e}"

# Create a Gradio Blocks interface with session state
with gr.Blocks(theme=gr.themes.Soft()) as app:
    gr.Markdown("## vLLM OpenChat-3.5 Interface")
    gr.Markdown("Run on your own machine using this command: ```docker run -it -p 7860:7860 --platform=linux/amd64 --gpus all \
    registry.hf.space/macadeliccc-openchat-3-5-chatbot:latest python app.py```")


    message = gr.Textbox(label="Your Message", placeholder="Type your message here")
    chatbot = gr.Chatbot()
    clear = gr.Button("Clear")

    chat_history = State([])  # Session state for chat history

    message.submit(user, [message, chatbot], [message, chatbot], queue=False).then(
        bot, chatbot, chatbot
    )
    clear.click(lambda: None, None, chatbot, queue=False)
app.launch()