const fs = require('fs');
const webPush = require('web-push');
const crypto = require('crypto');
const readline = require('readline');

// Create a readline interface
const rl = readline.createInterface({
  input: process.stdin,
  output: process.stdout,
});

// Wrap the question function in a Promise, so we can use async/await
const question = (prompt, defaultValue) =>
  new Promise((resolve) => {
    rl.question(`${prompt} (default: ${defaultValue}): `, (answer) => {
      // Use the default value if no answer was provided
      resolve(answer || defaultValue);
    });
  });

const setup = async () => {
  const devOrigin = await question(
    'Enter the dev origin',
    'http://localhost:5137',
  );
  const prodOrigin = await question(
    'Enter the production origin',
    'https://prod.site.this.api.connects.to.com',
  );

  const vapidEmail = await question(
    'Enter email address for VAPID keys',
    'example@gmail.com',
  );

  // Generate secret
  const secret = crypto.randomBytes(32).toString('hex');

  // Generate VAPID keys
  const vapidKeys = webPush.generateVAPIDKeys();

  // Create .env content
  const envContent =
    `SECRET=${secret}\n` +
    `VAPID_EMAIL=${vapidEmail}\n` +
    `VAPID_PUBLIC_KEY=${vapidKeys.publicKey}\n` +
    `VAPID_PRIVATE_KEY=${vapidKeys.privateKey}\n` +
    `DEV_ORIGIN=${devOrigin}\n` +
    `PROD_ORIGIN=${prodOrigin}\n`;

  // Write to .env
  fs.writeFileSync('.env', envContent);

  // Close the readline interface
  rl.close();

  console.log('Secrets generated and written to .env');
};

setup();