window.loadedActivities = [];

var addActivity = function(item) {
  var found = false;
  for (var i = 0; i < window.loadedActivities.length; i++) {
    if (window.loadedActivities[i].id == item.id) {
      var found = true;
    }
  }

  if (!found) {
    window.loadedActivities.push(item);
    window.loadedActivities.sort(function(a, b) {
      var returnValue;
      if (a.created_at > b.created_at)
        returnValue = -1;
      if (b.created_at > a.created_at)
        returnValue = 1;
      if (a.created_at == b.created_at)
        returnValue = 0;
      return returnValue;
    });
  }

  return item;
}

var renderActivities = function() {
  var source = $('#activities-template').html();
  var template = Handlebars.compile(source);
  var html = template({
    activities: window.loadedActivities,
    count: window.loadedActivities.length
  });
  var $activityFeedLink = $('li#activity-feed');

  $activityFeedLink.addClass('dropdown');
  $activityFeedLink.html(html);
  $activityFeedLink.find('a.dropdown-toggle').dropdown();
}

var pollActivity = function() {
  $.ajax({
    url: Routes.activities_path({format: 'json', since: window.lastFetch}),
    type: "GET",
    dataType: "json",
    success: function(data) {
      window.lastFetch = Math.floor((new Date).getTime() / 1000);
      if (data.length > 0) {
        for (var i = 0; i < data.length; i++) {
          addActivity(data[i]);
        }
         //Crashes here
        renderActivities();
      }
    }
  });
}

Handlebars.registerHelper('activityFeedLink', function() {
  return new Handlebars.SafeString(Routes.activities_path());
});

Handlebars.registerHelper('activityLink', function() {
  var link, path, html;
  var activity = this;
  var linkText = activity.targetable_type.toLowerCase();

  switch (linkText) {
    case "status":
      path = Routes.status_path(activity.targetable_id);
      break;

    case "userfriendship":
      path = Routes.profile_path(activity.profile_name);
      linkText = "friend";
      break;
  }

  if (activity.action === 'deleted') {
    path = '#';
  }

  html = "<li><a href='" + path + "'>" + this.user_name + " " + this.action + " a " + linkText + ".</a></li>";
  return new Handlebars.SafeString( html );
});

window.pollInterval = window.setInterval( pollActivity, 5000 );
pollActivity();