import Ember from 'ember';

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

  returnsAPromise(shouldResolve) {
    return new Ember.RSVP.Promise(resolve => {
      const promise = shouldResolve ? Ember.RSVP.resolve('yay! 🎉') : Ember.RSVP.reject('boo 😬');

      return promise
        .then(value => {
           this.log("Then from returned promise", value);
           resolve(value);
         })
        .catch(err => {
           // Because promise is never resolved OR rejected, it never resolves.
           this.log("Catch from returned promise", err);
        });
    });
  },

  log(...lines) {
    this.get('logs').pushObject(lines.join(', '));
  },

  actions: {
    callPromise(shouldResolve) {
      this.returnsAPromise(shouldResolve)
        .then(value => this.log("Then from caller", value))
        .catch(err => this.log("Catch from caller", err))
        .finally(() => this.log("Finally from caller"));
    }
  }
});