$(document).ready(init);

var pageLoaded;
var pageJsLoaded;

function init() {
    $('li.nav_section').hoverIntent( 
        function() {
            $(this).children('ul').stop(false, true).slideDown(800, "easeOutQuad");
        },
        function(){}
    );
    $('ul#side_nav').mouseleave( 
        function() {
            $('li.nav_section ul').filter(":not(.active)").stop(false, true).slideUp(1000, "easeOutQuad");
        }
    );
    $('#header_bug_slides').cycle({
		fx:'fade',
		sync:false,
		timeout:8500,
		containerResize:false,
		random:true,
		pause:true,
		//following 2 lines fix a bug in firefox on mac
		width:$('#header_bug_slides').width(),
		fit:true
	});
	
	firstPage = true;
	$.historyInit(gotoPage);
	
	$('a').click(onLinkClick);
}

function gotoPage(url)
{
    if(url == '') url = "/";
    
    $("#footer").fadeOut('normal')
    
    //reset
    page_init = null;
    pageLoaded = pageJsLoaded = false;
    
    //fade out and fetch page
    $("#col_2").fadeOut('normal', 
        function(){
            $(this).load( url + " #col_2 > *", contentCallback);
        }
    )
    
    var split = url.split('/');
    var section;
    
    //check for homepage
    if (split.length <= 2)
    {
        //retract all open sections and make them inactive
        $("ul#side_nav ul.active").slideUp(1000);
        $("ul#side_nav .active").removeClass('active');
        
        //check logo
        $("#ds_logo img").fadeTo(1000, 1);
    
        //load custom javascript for section
        jQuery.getScript( "/home.js", jsCallback );
    } 
    else if (split.length > 2) 
    {
        //check logo
        $("#ds_logo img").fadeTo(1000, 0.4);
        
        section = split[1];
        var sob = $("ul#side_nav ul#ctl00_" + section);
        
        //check if this section is already active
        if(!sob.hasClass('active')){
            //retract all other sections and make them inactive
            $("ul#side_nav ul.active").slideUp(1000, function(){$(this).removeClass('active');});
            
            //extend this section and make it active
            sob.addClass('active').slideDown(800);
        }
        
        $("ul#side_nav li.active").removeClass('active');
        
        if (split.length == 3)
        {
            page = section;
            $("ul#side_nav li#ctl00_" + page + "_all").addClass('active');
            
            //load custom javascript for section
            jQuery.getScript( url + "section.js", jsCallback );
        }
        else if (split.length > 3)
        {
            page = cleanPage(split[2]);
            $("ul#side_nav li#ctl00_" + page).addClass('active');
            
            //load custom javascript for page
            if(url.indexOf("/about/") == -1){
                jQuery.getScript( '/' + section + '/page.js', jsCallback );
            } else {
                jQuery.getScript( url + "page.js", jsCallback );
            }
        }
    }
}

function onLinkClick(){
    //var url = $(this).attr('href').replace(/^.*#/, '');
    var url = $(this).attr('href');
    
    //check for external links
    if(url.indexOf("/") == 0){
        $.historyLoad(url);
        return false;
    }
}

function contentCallback(responseText, textStatus, XMLHttpRequest) {
    $("#col_2, #footer").fadeIn('normal');
    pageLoaded = true;
    if(pageJsLoaded && page_init) page_init();
    
    //special code for project pages
    var exp = '\/\/START_FLAG[^\/]*\/\/END_FLAG';
    var tags = responseText.match(new RegExp(exp, 'mg'));
    
    if(tags)
    {
        for(var i=0; i<tags.length; i++){
            var clean = tags[i];
            //clean = clean.substring(12);
            //clean = clean.substring(0, clean.length - 10);
            eval(clean);
        }
    }
    
    $('a').click(onLinkClick);
}

function jsCallback(responseText, textStatus, XMLHttpRequest) {
    pageJsLoaded = true;
    if(pageLoaded && page_init) page_init();
}


function cleanPage(page){
    var i;
    while((i=page.indexOf('-')) != -1){
        page = page.substring(0, i) + page.substring(i+1);
    }
    return page;
}