/*! lightgallery - v1.2.0 - 2015-08-26
* http://sachinchoolur.github.io/lightgallery/
* copyright (c) 2015 sachin n; licensed apache 2.0 */
(function($, window, document, undefined) {

    'use strict';

    var defaults = {
        hash: true
    };

    var hash = function(element) {

        this.core = $(element).data('lightgallery');

        this.core.s = $.extend({}, defaults, this.core.s);

        if (this.core.s.hash) {
            this.oldhash = window.location.hash;
            this.init();
        }

        return this;
    };

    hash.prototype.init = function() {
        var _this = this;
        var _hash;

        // change hash value on after each slide transition
        _this.core.$el.on('onafterslide.lg.tm', function(event, previndex, index) {
            window.location.hash = 'lg=' + _this.core.s.galleryid + '&slide=' + index;
        });

        // listen hash change and change the slide according to slide value
        $(window).on('hashchange', function() {
            _hash = window.location.hash;
            var _idx = parseint(_hash.split('&slide=')[1], 10);

            // it galleryid doesn't exist in the url close the gallery
            if ((_hash.indexof('lg=' + _this.core.s.galleryid) > -1)) {
                _this.core.slide(_idx);
            } else if (_this.core.lgalleryon) {
                _this.core.destroy();
            }

        });
    };

    hash.prototype.destroy = function() {

        // reset to old hash value
        if (this.oldhash && this.oldhash.indexof('lg=' + this.core.s.galleryid) < 0) {
            window.location.hash = this.oldhash;
        } else {
            if (history.pushstate) {
                history.pushstate('', document.title, window.location.pathname + window.location.search);
            } else {
                window.location.hash = '';
            }
        }

    };

    $.fn.lightgallery.modules.hash = hash;

})(jquery, window, document);