import Service from '@ember/service';
import { getOwner } from '@ember/application';
import { get } from '@ember/object';

import qsaFactory from 'consul-ui/utils/dom/qsa-factory';
// TODO: Move to utils/dom
import getComponentFactory from 'consul-ui/utils/get-component-factory';
import normalizeEvent from 'consul-ui/utils/dom/normalize-event';
import createListeners from 'consul-ui/utils/dom/create-listeners';

// ember-eslint doesn't like you using a single $ so use double
// use $_ for components
const $$ = qsaFactory();
let $_;
export default Service.extend({
  doc: document,
  init: function() {
    this._super(...arguments);
    $_ = getComponentFactory(getOwner(this));
  },
  normalizeEvent: function() {
    return normalizeEvent(...arguments);
  },
  listeners: createListeners,
  root: function() {
    return get(this, 'doc').documentElement;
  },
  // TODO: Should I change these to use the standard names
  // even though they don't have a standard signature (querySelector*)
  elementById: function(id) {
    return get(this, 'doc').getElementById(id);
  },
  elementsByTagName: function(name, context) {
    context = typeof context === 'undefined' ? get(this, 'doc') : context;
    return context.getElementByTagName(name);
  },
  elements: function(selector, context) {
    return $$(selector, context);
  },
  element: function(selector, context) {
    if (selector.substr(0, 1) === '#') {
      return this.elementById(selector.substr(1));
    }
    // TODO: This can just use querySelector
    return [...$$(selector, context)][0];
  },
  // ember components aren't strictly 'dom-like'
  // but if you think of them as a web component 'shim'
  // then it makes more sense to think of them as part of the dom
  // with traditional/standard web components you wouldn't actually need this
  // method as you could just get to their methods from the dom element
  component: function(selector, context) {
    // TODO: support passing a dom element, when we need to do that
    return $_(this.element(selector, context));
  },
});