app.py

from transformers import GPT2LMHeadModel, AutoTokenizer
import gradio as gr
import torch
import time

model = GPT2LMHeadModel.from_pretrained("GBhaveshKumar/ConvoAI")
tokenizer = AutoTokenizer.from_pretrained("GBhaveshKumar/ConvoAI")

device = torch.device("cpu") 
model = model.to(device)

def respond(message, history):
    context = f"A: {message}\nB:"
    inputs = tokenizer(context, return_tensors="pt", truncation=True, max_length=128)
    inputs = {k: v.to(device) for k, v in inputs.items()}

    start_time = time.time()
    outputs = model.generate(
        **inputs,
        max_new_tokens=16,
        do_sample=False,
        pad_token_id=tokenizer.eos_token_id
    )
    duration = time.time() - start_time
    print(f"⏱️ Response time: {duration:.2f} seconds")

    decoded = tokenizer.decode(outputs[0], skip_special_tokens=True)
    reply = decoded[len(context):].strip().split("\n")[0]

    history.append((message, reply))
    return history

with gr.Blocks() as demo:
    gr.Markdown("<h1 style='text-align: center; color: #2e8b57;'>🤖 ConvoAI</h1>")
    gr.Markdown("<p style='text-align: center; font-size: 18px;'>Conversational AI trained using the DailyDialog dataset. Engage in meaningful and natural conversations!</p>")
    gr.Markdown('<p style="text-align: center; color: #2e8b57;">Download the Model: <a href="https://huggingface.co/GBhaveshKumar/ConvoAI">Link</a></p>')

    chatbot = gr.Chatbot()
    textbox = gr.Textbox(placeholder="Type your message and press Enter.")
    state = gr.State([])

    def user_input(message, history):
        history = history or []
        updated_history = respond(message, history)
        return "", updated_history, updated_history

    textbox.submit(user_input, [textbox, state], [textbox, chatbot, state])

demo.launch()