import * as webpush from 'web-push';
import * as fs from 'fs';
import * as path from 'path';

const envPath = path.join(__dirname, '..', '.env');

function generateVapidKeys(): void {
  console.log('Generating VAPID keys...');

  const vapidKeys = webpush.generateVAPIDKeys();

  let envContent = '';

  if (fs.existsSync(envPath)) {
    envContent = fs.readFileSync(envPath, 'utf-8');
  }

  const lines = envContent.split('\n');

  const vapidSubject = `VAPID_SUBJECT=mailto:contact@placebo.mk`;
  const vapidPublicKey = `VAPID_PUBLIC_KEY=${vapidKeys.publicKey}`;
  const vapidPrivateKey = `VAPID_PRIVATE_KEY=${vapidKeys.privateKey}`;

  const updatedLines = lines.filter(
    (line) =>
      !line.startsWith('VAPID_SUBJECT=') &&
      !line.startsWith('VAPID_PUBLIC_KEY=') &&
      !line.startsWith('VAPID_PRIVATE_KEY='),
  );

  const nonEmptyLines = updatedLines.filter((line) => line.trim() !== '');

  const newEnvContent =
    nonEmptyLines.join('\n') +
    (nonEmptyLines.length > 0 ? '\n' : '') +
    `${vapidSubject}\n${vapidPublicKey}\n${vapidPrivateKey}\n`;

  fs.writeFileSync(envPath, newEnvContent);

  console.log('VAPID keys generated and added to .env file:');
  console.log(`  Public Key: ${vapidKeys.publicKey}`);
  console.log(`  Private Key: ${vapidKeys.privateKey}`);
  console.log('\nKeep your private key secret!');
}

generateVapidKeys();