/*
 * Promises have three states: Pending, Resolved or Rejected
 * They execute immediately and settle into a final state
 * Anything that runs `then` on a promise will get the data
 * from the Resolved or Rejected state
 */

let done = true

// execution of the promise begins immediately
const isItDoneYet = new Promise((resolve, reject) => {
  console.log("new Promise")
  if (done) {
    const workDone = 'Here is the thing I built'
    resolve(workDone)
  } else {
    const why = 'Still working on something else'
    reject(why)
  }
  console.log("end promise")
})

const checkIfItsDone = () => {
  isItDoneYet
    .then(ok => {
      console.log(`then: ${ok}`)
    })
    .catch(err => {
      console.error(`catch: ${err}`)
    })
}

// Note how these both get the resolved data
checkIfItsDone()
setTimeout(checkIfItsDone, 1000)