import Helper from '@ember/component/helper';
import { get, computed } from '@ember/object';
import { getOwner } from '@ember/application';
import { assert } from '@ember/debug';

export default Helper.extend({
  router: computed(function() {
    return getOwner(this).lookup('router:main');
  }).readOnly(),
  route: computed(function() {
    return this.getRoute(this.get('router.currentRouteName'));
  }).readOnly(),
  getRoute(name) {
    return getOwner(this).lookup('route:' + name);
  },
  compute([attr, routeName]) {
    let route;
    if (routeName) {
        route = this.getRoute(routeName);
    }
    else {
      route = get(this, 'route');
    }
    assert('[ember-route-action-helper] Unable to lookup router', route);
    return get(route, attr);
  }
});