/**
 * Vendor A
 */
VendorA = {};

VendorA.title = function title() {
  return "Vendor A";
};

VendorA.pay = function pay(amount) {
  console.log(
    `setting up configuration using username: ${this.username} and password: ${
      this.password
    }`
  );
  return `Payment for service $${amount} is successful using ${this.title()}`;
};

/**
 *Vendor B
 */
VendorB = {};
VendorB.title = function title() {
  return "Vendor B";
};

VendorB.pay = function pay(amount) {
  console.log(
    `setting up configuration using username: ${this.username}
        and password: ${this.password}`
  );
  return `Payment for service $${amount} is successful using ${this.title()}`;
};

/**
 *
 * @param {*} vendorOption
 * @param {*} config
 */

function VendorFactory(vendorOption, config = {}) {
  const vendor = Object.create(vendorOption);
  Object.assign(vendor, config);
  return vendor;
}

const vendorFactory = VendorFactory(VendorA, {
  username: "test",
  password: "1234"
});
console.log(vendorFactory.title());
console.log(vendorFactory.pay(12));

const vendorFactory2 = VendorFactory(VendorB, {
  username: "testTwo",
  password: "4321"
});
console.log(vendorFactory2.title());
console.log(vendorFactory2.pay(50));