const crypto = require('crypto');
const path = require('path');
require('dotenv').config({ path: path.join(__dirname, '../.env') });

const ALGORITHM = 'aes-256-cbc';
const SECRET_KEY = crypto.createHash('sha256').update(process.env.CRYPTO_KEY || 'default_secret_key_12345').digest();

const encryptedText = process.argv[2];
if (!encryptedText) {
  console.log('Utilizzo: node decrypt.js "testo_criptato:valore"');
  process.exit(1);
}

try {
  const textParts = encryptedText.split(':');
  if (textParts.length < 2) {
    throw new Error('Formato testo cifrato non valido (manca il separatore ":")');
  }
  const iv = Buffer.from(textParts.shift(), 'hex');
  const encrypted = Buffer.from(textParts.join(':'), 'hex');
  const decipher = crypto.createDecipheriv(ALGORITHM, SECRET_KEY, iv);
  let decrypted = decipher.update(encrypted, 'hex', 'utf8');
  decrypted += decipher.final('utf8');

  console.log('Testo Criptato: ', encryptedText);
  console.log('Testo Decriptato:', decrypted);
} catch (err) {
  console.error('Errore durante la decriptazione:', err.message);
  process.exit(1);
}