cdb.admin.ConfigureCanvasDropdown = cdb.ui.common.Dropdown.extend({

  className: 'dropdown canvas_setup_dropdown',

  defaults: {
    speedOut: 100,
    speedIn: 100
  },

  events: {
    "click" : "killEvent"
  },

  initialize: function() {

    _.bindAll(this, "open", "hide", "_handleClick", "_keydown");

    // Extend options
    _.defaults(this.options, this.defaults);

    // Dropdown template
    this.template_base = cdb.templates.getTemplate(this.options.template_base);

    // Bind to target
    $(this.options.target).bind({ "click": this._handleClick});

    // Bind ESC key
    $(document).bind('keydown', this._keydown);

    // Is open flag
    this.isOpen = false;

  },

  /* Check if the dropdown is visible to hiding with the click on the target */
  _handleClick: function(ev) {
    if (ev) {
      ev.preventDefault();
    }

    // If visible
    if (this.isOpen){
      this.hide();
    } else{
      this.open();
    }
  },

  show: function() {

    var dfd = $.Deferred();
    var self = this;

    //sometimes this dialog is child of a node that is removed
    //for that reason we link again DOM events just in case
    this.delegateEvents();
    this.$el
    .css({
      marginTop: "-10px",
      opacity:0,
      display:"block"
    })
    .animate({
      margin: "0",
      opacity: 1
    }, {
      "duration": this.options.speedIn,
      "complete": function(){
        dfd.resolve();
      }
    });

    this.trigger("onDropdownShown", this.el);

    return dfd.promise();
  },

  open: function(ev, target) {

    cdb.god.trigger("closeDialogs");

    // Target
    var $target = target && $(target) || this.options.target;

    this.options.target = $target;

    this.$el.css({
      top: 40,
      left: 0
    })
    .addClass(
      // Add vertical and horizontal position class
      (this.options.vertical_position == "up" ? "vertical_top" : "vertical_bottom" )
      + " " +
        (this.options.horizontal_position == "right" ? "horizontal_right" : "horizontal_left" )
      + " " +
        // Add tick class
        "border tick_" + this.options.tick
    );

    // Show it
    this.show();
    this._recalcHeight();

    // Dropdown open
    this.isOpen = true;
  },


  hide: function(done) {

    if (!this.isOpen) {
      done && done();
      return;
    }

    var self    = this;
    this.isOpen = false;

    this.$el.animate({
      marginTop: self.options.vertical_position == "down" ? "10px" : "-10px",
      opacity: 0
    }, this.options.speedOut, function(){

      // And hide it
      self.$el.hide();

    });

    this.trigger("onDropdownHidden",this.el);
  },

  _recalcHeight: function() {

    var $ul  = this.$el.find("ul.special");

    // Resets heights
    $ul.height("auto");
    $ul.parent().height("auto");

    var special_height  = $ul.height();
    var dropdown_height = $ul.parent().height();

    // Sets heights
    if (special_height < dropdown_height) $ul.css("height", dropdown_height);
    else $ul.parent().height(special_height);

  },

  _addButton: function(title, icon_name, active, callback) {

    var button = new cdb.admin.OverlaysDropdownItem({
      template_name: 'table/views/overlays/canvas_dropdown_item',
      text: title,
      active: active,
      className: title.toLowerCase()
    }).on("click", callback, this);

    this.$el.find("ul").append(button.render().$el);

    return button;

  },

  _switchToDesktop: function() {

    this.desktopButton.model.set("active", true);
    this.mobileButton.model.set("active", false);
    this.options.canvas.set("mode", "desktop");

  },

  _switchToMobile: function() {

    this.desktopButton.model.set("active", false);
    this.mobileButton.model.set("active", true);
    this.options.canvas.set("mode", "mobile");

  },

  /*
   * Renders the dropdown
   */
  render: function() {

    this.clearSubViews();

    this.$el.html(this.template_base(this.options));

    this.desktopButton = this._addButton("Desktop", "desktop", true, this._switchToDesktop);
    this.mobileButton  = this._addButton("Mobile",  "mobile",  false, this._switchToMobile);

    return this;
  },

  clean: function() {
    $(document).unbind('keydown', this._keydown);
    cdb.ui.common.Dropdown.prototype.clean.call(this);
  }
});