/*!

 * Buttons helper for fancyBox

 * version: 1.0.5 (Mon, 15 Oct 2012)

 * @requires fancyBox v2.0 or later

 *

 * Usage:

 *     $(".fancybox").fancybox({

 *         helpers : {

 *             buttons: {

 *                 position : 'top'

 *             }

 *         }

 *     });

 *

 */

(function ($) {

	//Shortcut for fancyBox object

	var F = $.fancybox;

	//Add helper object

	F.helpers.buttons = {

		defaults : {

			skipSingle : false, // disables if gallery contains single image

			position   : 'top', // 'top' or 'bottom'

			tpl        : '<div id="fancybox-buttons"><ul><li><a class="btnPrev" title="Previous" href="javascript:;"></a></li><li><a class="btnPlay" title="Start slideshow" href="javascript:;"></a></li><li><a class="btnNext" title="Next" href="javascript:;"></a></li><li><a class="btnToggle" title="Toggle size" href="javascript:;"></a></li><li><a class="btnClose" title="Close" href="javascript:;"></a></li></ul></div>'

		},

		list : null,

		buttons: null,

		beforeLoad: function (opts, obj) {

			//Remove self if gallery do not have at least two items

			if (opts.skipSingle && obj.group.length < 2) {

				obj.helpers.buttons = false;

				obj.closeBtn = true;

				return;

			}

			//Increase top margin to give space for buttons

			obj.margin[ opts.position === 'bottom' ? 2 : 0 ] += 30;

		},

		onPlayStart: function () {

			if (this.buttons) {

				this.buttons.play.attr('title', 'Pause slideshow').addClass('btnPlayOn');

			}

		},

		onPlayEnd: function () {

			if (this.buttons) {

				this.buttons.play.attr('title', 'Start slideshow').removeClass('btnPlayOn');

			}

		},

		afterShow: function (opts, obj) {

			var buttons = this.buttons;

			if (!buttons) {

				this.list = $(opts.tpl).addClass(opts.position).appendTo('body');

				buttons = {

					prev   : this.list.find('.btnPrev').click( F.prev ),

					next   : this.list.find('.btnNext').click( F.next ),

					play   : this.list.find('.btnPlay').click( F.play ),

					toggle : this.list.find('.btnToggle').click( F.toggle ),

					close  : this.list.find('.btnClose').click( F.close )

				}

			}

			//Prev

			if (obj.index > 0 || obj.loop) {

				buttons.prev.removeClass('btnDisabled');

			} else {

				buttons.prev.addClass('btnDisabled');

			}

			//Next / Play

			if (obj.loop || obj.index < obj.group.length - 1) {

				buttons.next.removeClass('btnDisabled');

				buttons.play.removeClass('btnDisabled');

			} else {

				buttons.next.addClass('btnDisabled');

				buttons.play.addClass('btnDisabled');

			}

			this.buttons = buttons;

			this.onUpdate(opts, obj);

		},

		onUpdate: function (opts, obj) {

			var toggle;

			if (!this.buttons) {

				return;

			}

			toggle = this.buttons.toggle.removeClass('btnDisabled btnToggleOn');

			//Size toggle button

			if (obj.canShrink) {

				toggle.addClass('btnToggleOn');

			} else if (!obj.canExpand) {

				toggle.addClass('btnDisabled');

			}

		},

		beforeClose: function () {

			if (this.list) {

				this.list.remove();

			}

			this.list    = null;

			this.buttons = null;

		}

	};

}(jQuery));