import streamlit as st
from transformers import AutoModelForSeq2SeqLM, AutoTokenizer
import torch
import sys

st.title("Dialog Summarizer App")

# User input
user_input = st.text_area("Enter the dialog:")

# Add "Summarize" and "Clear" buttons
summarize_button = st.button("Summarize")
clear_button = st.button("Clear")

# If "Clear" button is clicked, clear the user input
if clear_button:
    user_input = ""

# "Summarize" button and user input, generate and display summary
if summarize_button and user_input:
    # Load pre-trained Pegasus model and tokenizer
    model_name = "ale-dp/pegasus-finetuned-dialog-summarizer"
    tokenizer = AutoTokenizer.from_pretrained(model_name)
    model = AutoModelForSeq2SeqLM.from_pretrained(model_name)

    # Generate summary
    summary = generate_summary(model, tokenizer, user_input)

    # Display the generated summary
    st.subheader("Generated Summary:")
    st.write(summary)

def generate_summary(model, tokenizer, dialogue):
    # Tokenize input dialogue
    inputs = tokenizer(dialogue, return_tensors="pt", max_length=1024, truncation=True)

    # Generate summary
    with torch.no_grad():
        summary_ids = model.generate(inputs["input_ids"], max_length=150, length_penalty=0.8, num_beams=4)

    # Decode and return the summary
    summary = tokenizer.decode(summary_ids[0], skip_special_tokens=True, clean_up_tokenization_spaces=True)
    return summary