const test = require('node:test');
const assert = require('node:assert/strict');
const fs = require('node:fs');

function loadStep14() {
  const source = fs.readFileSync('background/steps/fill-paypal-payment.js', 'utf8');
  const scope = {};
  new Function('self', `${source}; return self.MultiPageBackgroundStep14;`)(scope);
  return scope.MultiPageBackgroundStep14;
}

test('step 9 passes configured PayPal phone and sms api to content script', async () => {
  const api = loadStep14();
  let sentMessage = null;
  const executor = api.createStep14Executor({
    addLog: async () => {},
    fetchCheckoutAddress: async () => ({
      street: '1 Main St',
      city: 'New York',
      state: 'New York',
      zip: '10001',
    }),
    generateRandomEmail: () => 'checkout@example.com',
    sendToContentScriptResilient: async (_source, message) => {
      sentMessage = message;
    },
  });

  await executor.executeStep14({
    paypalPhone: '+15822201173',
    paypalSmsApiUrl: 'http://a.62-us.com/api/get_sms?key=test',
  });

  assert.equal(sentMessage.step, 9);
  assert.equal(sentMessage.payload.phone, '5822201173');
  assert.equal(sentMessage.payload.paypalPhone, '+15822201173');
  assert.equal(sentMessage.payload.paypalSmsApiUrl, 'http://a.62-us.com/api/get_sms?key=test');

  const card = sentMessage.payload.card;
  assert.equal(card.Credit_Card_Type, 'Visa');
  assert.match(card.Credit_Card_Number, /^4\d{15}$/);
  assert.equal(isLuhnValid(card.Credit_Card_Number), true);
  assert.match(card.Expires, /^(0[1-9]|1[0-2])\/\d{2}$/);
  assert.match(card.CVV2, /^\d{3}$/);
});

function isLuhnValid(value) {
  let sum = 0;
  let shouldDouble = false;
  for (let index = String(value).length - 1; index >= 0; index -= 1) {
    let digit = Number(value[index]);
    if (!Number.isInteger(digit)) return false;
    if (shouldDouble) {
      digit *= 2;
      if (digit > 9) digit -= 9;
    }
    sum += digit;
    shouldDouble = !shouldDouble;
  }
  return sum % 10 === 0;
}