/*!
 * 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:jquery.fancybox.close();"></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 )
				}
			}

			//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));