/*
Created By: Chris Campbell

Inspired by the lightbox implementation found at http://www.huddletogether.com/projects/lightbox/
*/

/*-------------------------------GLOBAL VARIABLES------------------------------------*/

var detect = navigator.userAgent.toLowerCase();
var OS,browser,version,total,thestring;
var lightboxesInitialized = false;

/*-----------------------------------------------------------------------------------------------*/

//Browser detect script origionally created by Peter Paul Koch at http://www.quirksmode.org/

function getBrowserInfo() {
	if(lightboxesInitialized == true) return;

	if (checkIt('konqueror')) {
		browser = "Konqueror";
		OS = "Linux";
	}
	else if (checkIt('safari')) browser 	= "Safari"
	else if (checkIt('omniweb')) browser 	= "OmniWeb"
	else if (checkIt('opera')) browser 		= "Opera"
	else if (checkIt('webtv')) browser 		= "WebTV";
	else if (checkIt('icab')) browser 		= "iCab"
	else if (checkIt('msie')) browser 		= "Internet Explorer"
	else if (!checkIt('compatible')) {
		browser = "Netscape Navigator"
		version = detect.charAt(8);
	}
	else browser = "An unknown browser";

	if (!version) version = detect.charAt(place + thestring.length);

	if (!OS) {
		if (checkIt('linux')) OS 		= "Linux";
		else if (checkIt('x11')) OS 	= "Unix";
		else if (checkIt('mac')) OS 	= "Mac"
		else if (checkIt('win')) OS 	= "Windows"
		else OS 								= "an unknown operating system";
	}
	//alert(browser);
}

function checkIt(string) {
	place = detect.indexOf(string) + 1;
	thestring = string;
	return place;
}

/*-----------------------------------------------------------------------------------------------*/



/*Event.observe(window, 'load', initialize, false);
Event.observe(window, 'load', getBrowserInfo, false);
Event.observe(window, 'unload', Event.unloadCache, false);*/

var lightbox = new Class({

	yPos : 0,
	xPos : 0,
// Turn everything on - mainly the IE fixes
	activate: function(){
		if (browser == 'Internet Explorer'){	
			this.getScroll();
			this.prepareIE('100%', 'hidden');
			this.setScroll(0,0);
			this.hideSelects('hidden');
		}
		this.displayLightbox("block");
	},

	initialize: function(url, launch) {
		this.content = url;
		if(launch == true) this.activate();

	},
	// Ie requires height to 100% and overflow hidden or else you can scroll down past the lightbox
	prepareIE: function(height, overflow){
		bod = document.getElementsByTagName('body')[0];
		bod.style.height = height;
		bod.style.overflow = overflow;

		htm = document.getElementsByTagName('html')[0];
		htm.style.height = height;
		htm.style.overflow = overflow;
	},

	// In IE, select elements hover on top of the lightbox
	hideSelects: function(visibility){
		selects = document.getElementsByTagName('select');
		for(i = 0; i < selects.length; i++) {
			selects[i].style.visibility = visibility;
		}
	},

	// Taken from lightbox implementation found at http://www.huddletogether.com/projects/lightbox/
	getScroll: function(){
		if (self.pageYOffset) {
			this.yPos = self.pageYOffset;
		} else if (document.documentElement && document.documentElement.scrollTop){
			this.yPos = document.documentElement.scrollTop;
		} else if (document.body) {
			this.yPos = document.body.scrollTop;
		}
	},

	setScroll: function(x, y){
		window.scrollTo(x, y);
	},

	displayLightbox: function(display){
		
		$('overlay').style.display = display;
		$('lightbox').style.display = display;
		if(display != 'none') this.loadInfo();
		//$('lightbox').innerHTML = '<div style="background:white;width:100px;height:100px;">xxx</div>';
	},

	// Begin Ajax request based off of the href of the clicked linked
	loadInfo: function() {
		
		new Ajax(this.content, {method: 'get',update: $('lightbox')	}).request();

	},


	// Example of creating your own functionality once lightbox is initiated
	deactivate: function(){

		if (browser == "Internet Explorer"){
			this.setScroll(0,this.yPos);
			this.prepareIE("auto", "auto");
			this.hideSelects("visible");
		}

		this.displayLightbox("none");
	}
});

/*-----------------------------------------------------------------------------------------------*/

// Onload, make all links that need to trigger a lightbox active
//window.addEvent( 'load', getBrowserInfo);
/*
window.addEvent('domready', function() {
	
});*/

var firefoxAddonLightBox;
var reportCompleteAddonLightBox;
window.addEvent('domready', function(){

	if(lightboxesInitialized == true) return;

	addLightboxMarkup();
	firefoxAddonLightBox = new lightbox('download.php', false);
	reportCompleteAddonLightBox = new lightbox('report_completed.php', false);
	/*var arrels = document.getElements('a[class=lbox]');
	for (i=0;i<arrels.length;i++)
	{
	valid = new lightbox(arrels[i].id, false);

	}*/
	

	lightboxesInitialized = true;
});

var lastChartState;
function firefoxAddon(display)
{
   if (display)
   {
      if (LD.hasExtension)
      {
        return true;
      }
   }
   if (display)
   {
	firefoxAddonLightBox.activate();
	if ($('pagerankChart'))
	{
	    if ($('pagerankChart').style.display != 'none')
	    {
	        lastChartState = true;
	        $('pagerankChart').style.display = 'none';
	        $('linkTypeChart').style.display = 'none';
	    }
	}
   }
   else
   {
	firefoxAddonLightBox.deactivate();
	if ($('pagerankChart') && lastChartState)
	{
	    $('pagerankChart').style.display = 'block';
	    $('linkTypeChart').style.display = 'block';
	}
	lastChartState = null;
   }
   return false;
}

function reportCompletedOverlay(display)
{

   if (display)
   {
	reportCompleteAddonLightBox.activate();
	$('pagerankChart').style.display = 'none';
	$('linkTypeChart').style.display = 'none';
   }
   else
   {
	reportCompleteAddonLightBox.deactivate();
	$('pagerankChart').style.display = 'block';
	$('linkTypeChart').style.display = 'block';
   }
   return false;
}

// Add in markup necessary to make this work. Basically two divs:
// Overlay holds the shadow
// Lightbox is the centered square that the content is put into.
function addLightboxMarkup() {
	bod 				= document.getElementsByTagName('body')[0];
	overlay 			= document.createElement('div');
	overlay.id		= 'overlay';
	lb					= document.createElement('div');
	lb.id				= 'lightbox';
	lb.className 	= 'loading';
	lb.innerHTML	= '<div id="lbLoadMessage">' +
						  '<p></p>' +
						  '</div>';
	bod.appendChild(overlay);
	bod.appendChild(lb);
}