'use strict';

// the wrapper
function addPromiseToCallback(fn) {
  const result = function () {
    fn(...arguments);
    result.resolve([...arguments]);
  };

  result.promise = new Promise((resolve) => {
    result.resolve = resolve;
  });

  return result;
}

// an example third party function that calls a callback
// in my case this would be the AWS Lambda infrastructure
function callsCallback(cb) {
  setTimeout(() => cb('giraffe', Date.now()), 100);
}

// my callback function
function myCallback(arg1, arg2) {
  console.log(`called back! ${arg1}, ${arg2}`);
}

const callbackWithPromise = addPromiseToCallback(myCallback);

callsCallback(callbackWithPromise);

callbackWithPromise.promise
  .then((args) => {
    console.log(`Promise 1 resolved with ${args[0]}, ${args[1]}`);
  });