import Ember from 'ember';
import { task, waitForProperty, timeout } from 'ember-concurrency';

const promptTask = task({
  answer: undefined,

  * perform() {
    yield waitForProperty(this, 'answer', a => a !== undefined);
    return this.answer;
  }
});

export default Ember.Controller.extend({
  appName: 'Ember Twiddle',

  main: task(function * () {
    let confirmed = yield this.confirm.perform();

    if (!confirmed) {
      return;
    }

    let name = yield this.promptForName.perform();

    yield this.work.perform(name);
  }),

  confirm: promptTask,
  promptForName: promptTask,

  work: task({
    name: null,

    * perform(name) {
      this.set('name', name);
      yield timeout(3000);
    }
  })
});