from flask import jsonify, send_file, request
from main import *
#from main import import summarization_model, summarization_word_to_index, device
import torch

def summarize_text(text, output_path="output_summary.txt"):
    if summarization_model is None:
        return "Summarization model not initialized."

    input_tokens = [summarization_word_to_index.get(word.lower(), 1) for word in text.split()]
    input_tensor = torch.tensor([input_tokens], dtype=torch.long).to(device)

    with torch.no_grad():
        summary_ids = summarization_model.generate(input_tensor, num_beams=4, max_length=100, early_stopping=True)
        summary_text = summarization_model.tokenizer.decode(summary_ids[0], skip_special_tokens=True)

    with open(output_path, "w") as file:
        file.write(summary_text)
    return output_path

def summarization_api():
    data = request.get_json()
    text = data.get('text')
    if not text:
        return jsonify({"error": "Text is required"}), 400
    output_file = summarize_text(text)
    if output_file == "Summarization model not initialized.":
        return jsonify({"error": "Summarization failed"}), 500
    return send_file(output_file, mimetype="text/plain", as_attachment=True, download_name="output_summary.txt")