import loadScript from 'discourse/lib/load-script';

var _loaded = false,
    _promise = null,
    currentUser = Discourse.User.current(),
    publisher_id = Discourse.SiteSettings.adsense_publisher_code;

const mobileView = Discourse.Site.currentProp('mobileView');

function parseAdWidth(value) {
  if (value === 'responsive') { return 'auto'; }
  return `${parseInt( value.substring(0, 3).trim() )}px`;
}

function parseAdHeight(value) {
  if (value === 'responsive') { return 'auto'; }
  return `${parseInt( value.substring(4, 7).trim() )}px`;
}

function loadAdsense() {
  if (_loaded) {
    return Ember.RSVP.resolve();
  }

  if (_promise) {
    return _promise;
  }

  var adsenseSrc = (('https:' === document.location.protocol) ? 'https:' : 'http:') + '//pagead2.googlesyndication.com/pagead/js/adsbygoogle.js';
  _promise = loadScript(adsenseSrc, { scriptTag: true }).then(function() {
    _loaded = true;
  });

  return _promise;
}

var data = {
  "topic-list-top" : {},
  "topic-above-post-stream" : {},
  "topic-above-suggested" : {},
  "post-bottom" : {}
};

if (Discourse.SiteSettings.adsense_publisher_code) {
  if (!mobileView && Discourse.SiteSettings.adsense_topic_list_top_code) {
    data["topic-list-top"]["ad_code"] = Discourse.SiteSettings.adsense_topic_list_top_code;
    data["topic-list-top"]["ad_width"] = parseAdWidth(Discourse.SiteSettings.adsense_topic_list_top_ad_sizes);
    data["topic-list-top"]["ad_height"] = parseAdHeight(Discourse.SiteSettings.adsense_topic_list_top_ad_sizes);
  }
  if (mobileView && Discourse.SiteSettings.adsense_mobile_topic_list_top_code) {
    data["topic-list-top"]["ad_code"] = Discourse.SiteSettings.adsense_mobile_topic_list_top_code;
    data["topic-list-top"]["ad_width"] = parseAdWidth(Discourse.SiteSettings.adsense_mobile_topic_list_top_ad_size);
    data["topic-list-top"]["ad_height"] = parseAdHeight(Discourse.SiteSettings.adsense_mobile_topic_list_top_ad_size);
  }
  if (!mobileView && Discourse.SiteSettings.adsense_topic_above_post_stream_code) {
    data["topic-above-post-stream"]["ad_code"] = Discourse.SiteSettings.adsense_topic_above_post_stream_code;
    data["topic-above-post-stream"]["ad_width"] = parseAdWidth(Discourse.SiteSettings.adsense_topic_above_post_stream_ad_sizes);
    data["topic-above-post-stream"]["ad_height"] = parseAdHeight(Discourse.SiteSettings.adsense_topic_above_post_stream_ad_sizes);
  }
  if (mobileView && Discourse.SiteSettings.adsense_mobile_topic_above_post_stream_code) {
    data["topic-above-post-stream"]["ad_code"] = Discourse.SiteSettings.adsense_mobile_topic_above_post_stream_code;
    data["topic-above-post-stream"]["ad_width"] = parseAdWidth(Discourse.SiteSettings.adsense_mobile_topic_above_post_stream_ad_size);
    data["topic-above-post-stream"]["ad_height"] = parseAdHeight(Discourse.SiteSettings.adsense_mobile_topic_above_post_stream_ad_size);
  }
  if (!mobileView && Discourse.SiteSettings.adsense_topic_above_suggested_code) {
    data["topic-above-suggested"]["ad_code"] = Discourse.SiteSettings.adsense_topic_above_suggested_code;
    data["topic-above-suggested"]["ad_width"] = parseAdWidth(Discourse.SiteSettings.adsense_topic_above_suggested_ad_sizes);
    data["topic-above-suggested"]["ad_height"] = parseAdHeight(Discourse.SiteSettings.adsense_topic_above_suggested_ad_sizes);
  }
  if (mobileView && Discourse.SiteSettings.adsense_mobile_topic_above_suggested_code) {
    data["topic-above-suggested"]["ad_code"] = Discourse.SiteSettings.adsense_mobile_topic_above_suggested_code;
    data["topic-above-suggested"]["ad_width"] = parseAdWidth(Discourse.SiteSettings.adsense_mobile_topic_above_suggested_ad_size);
    data["topic-above-suggested"]["ad_height"] = parseAdHeight(Discourse.SiteSettings.adsense_mobile_topic_above_suggested_ad_size);
  }
  if (!mobileView && Discourse.SiteSettings.adsense_post_bottom_code) {
    data["post-bottom"]["ad_code"] = Discourse.SiteSettings.adsense_post_bottom_code;
    data["post-bottom"]["ad_width"] = parseAdWidth(Discourse.SiteSettings.adsense_post_bottom_ad_sizes);
    data["post-bottom"]["ad_height"] = parseAdHeight(Discourse.SiteSettings.adsense_post_bottom_ad_sizes);
  }
  if (mobileView && Discourse.SiteSettings.adsense_mobile_post_bottom_code) {
    data["post-bottom"]["ad_code"] = Discourse.SiteSettings.adsense_mobile_post_bottom_code;
    data["post-bottom"]["ad_width"] = parseAdWidth(Discourse.SiteSettings.adsense_mobile_post_bottom_ad_size);
    data["post-bottom"]["ad_height"] = parseAdHeight(Discourse.SiteSettings.adsense_mobile_post_bottom_ad_size);
  }
}

export default Ember.Component.extend({
  classNameBindings: [':google-adsense', 'classForSlot', 'isResponsive:adsense-responsive'],
  loadedGoogletag: false,

  publisher_id: publisher_id,
  ad_width: null,
  ad_height: null,

  adRequested: false,

  init() {
    this.set('ad_width', data[this.placement]["ad_width"] );
    this.set('ad_height', data[this.placement]["ad_height"] );
    this.set('ad_code', data[this.placement]["ad_code"] );
    this._super();
  },

  _triggerAds() {
    this.set('adRequested', true);
    loadAdsense().then(function() {
      const adsbygoogle = window.adsbygoogle || [];

      try {
        adsbygoogle.push({}); // ask AdSense to fill one ad unit
      } catch (ex) {}
    });
  },

  didInsertElement() {
    this._super();

    if (!this.get('showAd')) { return; }

    if (this.get('listLoading')) { return; }

    Ember.run.scheduleOnce('afterRender', this, this._triggerAds);
  },

  waitForLoad: function() {
    if (this.get('adRequested')) { return; } // already requested that this ad unit be populated
    if (!this.get('listLoading')) {
      Ember.run.scheduleOnce('afterRender', this, this._triggerAds);
    }
  }.observes('listLoading'),

  isResponsive: function() {
    return this.get('ad_width') === 'auto';
  }.property('ad_width'),

  classForSlot: function() {
    return `adsense-${this.get('placement')}`.htmlSafe();
  }.property('placement'),

  autoAdFormat: function() {
    return this.get('isResponsive') ? 'auto'.htmlSafe() : false;
  }.property('isResponsive'),

  adWrapperStyle: function() {
    return (this.get('isResponsive') ? '' : `width: ${this.get('ad_width')}; height: ${this.get('ad_height')};`).htmlSafe();
  }.property('ad_width', 'ad_height'),

  adInsStyle: function() {
    return `display: ${this.get('isResponsive') ? 'block' : 'inline-block'}; ${this.get('adWrapperStyle')}`.htmlSafe();
  }.property('adWrapperStyle', 'isResponsive'),

  checkTrustLevels: function() {
    return !((currentUser) && (currentUser.get('trust_level') > Discourse.SiteSettings.adsense_through_trust_level));
  }.property('trust_level'),

  showAd: function() {
    return Discourse.SiteSettings.adsense_publisher_code && this.get('checkTrustLevels');
  }.property('checkTrustLevels')
});