/*
* Pagify - A jquery plugin for effortlessly creating single page web sites.
*
* Licensed under the MIT:
* http://www.opensource.org/licenses/mit-license.php
*
* Copyright (c) 2011, Chris Polis
*/

(function ($) {
    $.fn.pagify = function (options) {
        var self = this;

        this.defaults = {
            pages: [],
            'default': null,
            animation: 'show',
            onChange: function (page) { },
            cache: false
        };
        this.settings = $.extend({}, this.defaults, options);

        // Run after loading if caching, otherwise run immediately
        var runAfterLoading = function () {
            self.switchPage = function (page) {

                // Page is selected from: passed in value, window.location, default
                if (!page) {
                    page = window.location.hash.replace('#', '') || self.settings['default'];
                }

                // Load page content from cache 
                if (self.settings.cache) {
                    $(self).hide().html(self.pages[page])[self.settings.animation]();
                    self.settings.onChange(page);

                    // Fetch page content
                } else {
                    $.get(page + '.aspx', function (content) {
                        $(self).hide().html(content)[self.settings.animation](1000);
                        self.settings.onChange(page);
                    }, 'text');
                }
            }

            // Respond to hash changes
            $(window).bind('hashchange', function () {
                self.switchPage();
            });

            // Load initial page - current hash or default page
            if (window.location.hash) self.switchPage();
            else if (self.settings['default']) self.switchPage(self.settings['default']);

        };

        // Cache pages
        if (self.settings.cache) {
            self.pages = {};
            var pageLoads = self.settings.pages.length;
            $.each(self.settings.pages, function (ndx, page) {
                $.get(page + '.aspx', function (content) {
                    self.pages[page] = content;
                    pageLoads--;
                    if (!pageLoads) runAfterLoading();
                }, 'text');
            });
        } else runAfterLoading();
    };

})(jQuery);