New Twiddle

controllers.application.js

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

const { Controller, computed, computed: { or } } = Ember;

export default Controller.extend({
  jackpot: 1000,
  jackpotText: computed('jackpot', function() {
    return `$$${this.jackpot.toFixed()}`;
  }),

  odds: 0.001,
  oddsText: computed('odds', function() {
    return `1 in ${(1/this.odds).toFixed()}`;
  }),
  
  didWin: false,
  
  buttonDisabled: or('didWin', 'draw.isRunning'),
  buttonLabel: 'Try Your Luck',
  
  draw: task(function *() {
    let { jackpot, odds } = this;
    let didWin = Math.random() < odds;
    
    if (didWin) {
			this.setProperties({ didWin });
      return;
    } else {
      odds /= 2;
      jackpot *= 2;
      
      this.setProperties({ odds, jackpot });
      
      let seconds = 30;
      
      while (seconds > 0) {
        this.set('buttonLabel', `Sorry, you didn't win :( Try again in ${seconds}s...`);
        yield timeout(1000);
	      seconds--;
      }
      
      this.set('buttonLabel', 'Try Your Luck');
    }
  }).drop(),
});

templates.application.hbs

{{#if this.didWin}}
	<h1>Congratulations!</h1>
  
  <h2>You may collect {{this.jackpotText}} from your wallet.</h2>
{{else}}
  <h2>Jackpot: {{this.jackpotText}}</h2>
  <h2>Odds of winning: {{this.oddsText}}</h2>

  <button disabled={{this.buttonDisabled}} {{action (perform this.draw)}}>
		{{this.buttonLabel}}
  </button>
{{/if}}

twiddle.json

{
  "version": "0.15.1",
  "EmberENV": {
    "FEATURES": {}
  },
  "options": {
    "use_pods": false,
    "enable-testing": false
  },
  "dependencies": {
    "jquery": "https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.js",
    "ember": "3.4.3",
    "ember-template-compiler": "3.4.3"
  },
  "addons": {
		"ember-concurrency": "0.8.19"
  }
}