import gradio as gr
import requests
import json
import os

API_KEY = os.getenv('API_KEY')
INVOKE_URL = "https://api.nvcf.nvidia.com/v2/nvcf/pexec/functions/0e349b44-440a-44e1-93e9-abe8dcb27158"
FETCH_URL_FORMAT = "https://api.nvcf.nvidia.com/v2/nvcf/pexec/status/"
headers = {
    "Authorization": f"Bearer {API_KEY}",
    "Accept": "application/json",
    "Content-Type": "application/json",
}

BASE_SYSTEM_MESSAGE = "I carefully provide accurate, factual, thoughtful, nuanced answers and am brilliant at reasoning."

def user(message, history, system_message=None):
    print(f"User message: {message}")
    history = history or []
    if system_message:
        history.append({"role": "system", "content": system_message})
    history.append({"role": "user", "content": message})
    return history

def call_nvidia_api(history, max_tokens, temperature, top_p):
    payload = {
        "messages": history,
        "temperature": temperature,
        "top_p": top_p,
        "max_tokens": max_tokens,
        "stream": False
    }
    print(f"Payload enviado: {payload}")

    session = requests.Session()
    response = session.post(INVOKE_URL, headers=headers, json=payload)

    while response.status_code == 202:
        request_id = response.headers.get("NVCF-REQID")
        fetch_url = FETCH_URL_FORMAT + request_id
        response = session.get(fetch_url, headers=headers)
        response.raise_for_status()
        response_body = response.json()
        print(f"Payload recebido: {response_body}")

        if response_body["choices"]:
            assistant_message = response_body["choices"][0]["message"]["content"]
            history.append({"role": "assistant", "content": assistant_message})
            return history

def chat(history, system_message, max_tokens, temperature, top_p, top_k, repetition_penalty):
    print("Starting chat...")
    updated_history = user(None, history, system_message)
    updated_history = call_nvidia_api(updated_history, max_tokens, temperature, top_p)
    return updated_history, ""

def update_chatbot(message, chat_history, system_message, max_tokens, temperature, top_p):
    print("Updating chatbot...")
    chat_history = user(message, chat_history, system_message if not chat_history else None)
    chat_history = call_nvidia_api(chat_history, max_tokens, temperature, top_p)
    return chat_history

with gr.Blocks() as demo:
    with gr.Row():
        with gr.Column():
            gr.Markdown("LLAMA 2 70B Free Demo")
            description = """
<div style="text-align: center; font-size: 1.5em; margin-bottom: 20px;">
    <strong>Explore the Capabilities of LLAMA 2 70B</strong>
</div>
<p>Llama 2 is a large language AI model capable of generating text and code in response to prompts.</p>
<p><strong>How to Use:</strong></p>
<ol>
    <li>Enter your <strong>message</strong> in the textbox to start a conversation or ask a question.</li>
    <li>Adjust the parameters in the "Additional Inputs" accordion to control the model's behavior.</li>
    <li>Use the buttons below the chatbot to submit your query, clear the chat history, or perform other actions.</li>
</ol>
<p><strong>Powered by NVIDIA's cutting-edge AI API, LLAMA 2 70B offers an unparalleled opportunity to interact with an AI model of exceptional conversational ability, accessible to everyone at no cost.</strong></p>
<p><strong>HF Created by:</strong> @artificialguybr (<a href="https://twitter.com/artificialguybr">Twitter</a>)</p>
<p><strong>Discover more:</strong> <a href="https://artificialguy.com">artificialguy.com</a></p>
"""
            gr.Markdown(description)

            chat_history_state = gr.State([])

            system_msg = gr.Textbox(BASE_SYSTEM_MESSAGE, label="System Message", placeholder="System prompt.", lines=5)
            max_tokens = gr.Slider(20, 1024, label="Max Tokens", step=20, value=1024)
            temperature = gr.Slider(0.0, 1.0, label="Temperature", step=0.1, value=0.2)
            top_p = gr.Slider(0.0, 1.0, label="Top P", step=0.05, value=0.7)

            chatbot = gr.ChatInterface(
                fn=lambda message, history: update_chatbot(message, history, system_msg.value, max_tokens.value, temperature.value, top_p.value),
                additional_inputs=[system_msg, max_tokens, temperature, top_p],
                title="LLAMA 2 70B Chatbot",
                submit_btn="Submit",
                clear_btn="🗑️ Clear",
            )

            def clear_chat():
                chat_history_state.value = []
                chatbot.textbox.value = ""

            chatbot.clear()

demo.launch()