var widgetName = NDgetKeyValue("Info.plist", "CFBundleName");
var location = 'http://novisdesign.net/WidgetResorces/Updates/ChiPet.txt';
var current = NDgetKeyValue("Info.plist", "CFBundleVersion");
var downloadPage = 'http://www.novisdesign.net/Widgets?chipet';
var checkDays = 5;
var newestVersion;

function NDupdate() {
	if (window.widget) {
		var lastDate = widget.preferenceForKey('lastDate');
		if (lastDate != undefined) {
			NDcheckAmount();
		}
		else {
			NDsetTimeForNow();
		}
	}
}

var NDreq;
function NDcheck() {
	NDreq = new XMLHttpRequest();
    NDreq.onreadystatechange = NDcompare;
    NDreq.open("GET", location, true);
    NDreq.setRequestHeader("Cache-Control", "no-cache");
    NDreq.send(null);
}
function NDcompare() {
	if (NDreq.readyState == 4) {
		if (NDreq.status == 200) {
        	var newNumber = NDreq.responseText;
        	if (newNumber > current) {
        		newestVersion = newNumber;
        		NDshow()
        	}
        	else {
        		NDaddTime()
        	}
		}
	}	
}

var w = window.innerWidth;
var h = window.innerHeight;
var leftPx = Math.round(((w - 20) - 54) / 2)
var topPx = Math.round(((h - 30) - 36) / 2)

function NDshow() {
	if (!document.getElementById('NDmain')) {
		var newElm = document.createElement('div');
		newElm.id = 'NDmain';
		
		var title = document.createElement('div');
		title.id = 'NDtitle';
		title.innerHTML = 'Update Avaliable';
		
		var update = document.createElement('div');
		update.id = 'NDupdate';
		update.innerHTML = widgetName + ' version ' + newestVersion + '<br/> <b>now available</b>';
		
		var buttons = document.createElement('div');
		buttons.id = 'NDbuttons';
		var bElm = document.createElement('div');
		bElm.id = 'NDbElm';
		bElm.innerHTML = '<img src="ndupdate/Images/download.png" id="NDdownload" onclick="NDgoToDownlaod();NDaddTime();"/> <img src="ndupdate/Images/later.png" id="NDlater" onclick="NDaddTime()"/>';
		buttons.appendChild(bElm);
		
		var top = document.createElement('div');
		top.id = 'NDtop';
		var topFill = document.createElement('div');
		topFill.id = 'NDtopFill';
		var topLeft = document.createElement('div');
		topLeft.id = 'NDtopLeft';
		var topRight = document.createElement('div');
		topRight.id = 'NDtopRight';
		top.appendChild(topFill);
		top.appendChild(topLeft);
		top.appendChild(topRight);
		
		var mid = document.createElement('div');
		mid.id = 'NDmid';
		var midLogo = document.createElement('div');
		midLogo.id = 'NDmidLogo';
		midLogo.style.left = leftPx + 'px';
		midLogo.style.top = topPx + 'px';
		var midTop = document.createElement('div');
		midTop.id = 'NDmidTop';
		midTop.style.height = topPx + 'px';
		var midBottom = document.createElement('div');
		midBottom.id = 'NDmidBottom';
		midBottom.style.top = topPx + 36 + 'px';
		var midLeft = document.createElement('div');
		midLeft.id = 'NDmidLeft';
		midLeft.style.top = topPx + 'px';
		midLeft.style.width = leftPx + 'px';
		var midRight = document.createElement('div');
		midRight.id = 'NDmidRight';
		midRight.style.top = topPx + 'px';
		midRight.style.left = leftPx + 54 + 'px';
		mid.appendChild(midLogo);
		mid.appendChild(midTop);
		mid.appendChild(midBottom);
		mid.appendChild(midLeft);
		mid.appendChild(midRight);
			
		var bottom = document.createElement('div');
		bottom.id = 'NDbottom';
		var bottomFill = document.createElement('div');
		bottomFill.id = 'NDbottomFill';
		var bottomLeft = document.createElement('div');
		bottomLeft.id = 'NDbottomLeft';
		var bottomRight = document.createElement('div');
		bottomRight.id = 'NDbottomRight';
		bottom.appendChild(bottomFill);
		bottom.appendChild(bottomLeft);
		bottom.appendChild(bottomRight);
		
		var gloss = document.createElement('div');
		gloss.id = 'NDgloss';
		var glossFill = document.createElement('div');
		glossFill.id = 'NDglossFill';
		var glossLeft = document.createElement('div');
		glossLeft.id = 'NDglossLeft';
		var glossRight = document.createElement('div');
		glossRight.id = 'NDglossRight';
		gloss.appendChild(glossFill);
		gloss.appendChild(glossLeft);
		gloss.appendChild(glossRight);
		
		var shadow = document.createElement('div');
		shadow.id = 'NDshadow';
		var shadowBottom = document.createElement('div');
		shadowBottom.id = 'NDshadowBottom';
		var shadowBottomLeft = document.createElement('div');
		shadowBottomLeft.id = 'NDshadowBottomLeft';
		var shadowBottomFill = document.createElement('div');
		shadowBottomFill.id = 'NDshadowBottomFill';
		var shadowBottomRight = document.createElement('div');
		shadowBottomRight.id = 'NDshadowBottomRight';
		shadowBottom.appendChild(shadowBottomLeft)
		shadowBottom.appendChild(shadowBottomFill)
		shadowBottom.appendChild(shadowBottomRight)
		var shadowRight = document.createElement('div');
		shadowRight.id = 'NDshadowRight';
		var shadowRightFill = document.createElement('div');
		shadowRightFill.id = 'NDshadowRightFill';
		var shadowTopRight = document.createElement('div');
		shadowTopRight.id = 'NDshadowTopRight';
		shadowRight.appendChild(shadowRightFill)
		shadowRight.appendChild(shadowTopRight)
		shadow.appendChild(shadowBottom)
		shadow.appendChild(shadowRight)
		
		newElm.appendChild(title);
		newElm.appendChild(update);
		newElm.appendChild(buttons);
		newElm.appendChild(top);
		newElm.appendChild(mid);
		newElm.appendChild(bottom);
		newElm.appendChild(gloss);
		newElm.appendChild(shadow);
		
		document.body.appendChild(newElm)
	}
}

function NDgoToDownlaod() {
	if (window.widget) {
		widget.openURL(downloadPage);
	}
}

function NDaddTime() {
	if (window.widget) {
		var d = new Date();
		var mil = d.getTime();
		widget.setPreferenceForKey(mil,'lastDate');
	}
	document.body.removeChild(document.getElementById('NDmain'));
}

function NDcheckAmount() {
	if (window.widget) {
		var d = new Date();
		var lastDate = widget.preferenceForKey('lastDate');
		var nowDate = d.getTime();
		if ((nowDate - lastDate) > (86400000 * checkDays)) {
			NDcheck();
		}
	}
}

function NDsetTimeForNow() {
	if (window.widget) {
		var d = new Date();
		var mil = d.getTime();
		widget.setPreferenceForKey(mil,'lastDate');
	}
}

// Adapted from Jon Brown's Tutorial
function NDgetKeyValue(plist, key) {
	var xml_http = new XMLHttpRequest();
	xml_http.open("GET", plist, false);
	xml_http.send(null); 

	var xml = xml_http.responseXML;
	var key_value = null;
	var nodes = xml.getElementsByTagName("dict")[0].childNodes; 

	for (var i=0; i < nodes.length; i++) {
		if (nodes[i].nodeType == 1 && nodes[i].tagName.toLowerCase() == "key" && nodes[i].firstChild.data == key) {
			if (nodes[i+2].tagName.toLowerCase() != "array") {
				key_value = nodes[i+2].firstChild.data;
			}
			else {
				key_value = new Array();
				var ar_nodes = nodes[i+2].childNodes;
				for (var j=0; j < ar_nodes.length; j++) {
					if (ar_nodes[j].nodeType == 1)
					key_value.push(ar_nodes[j].firstChild.data);
            	}
        	} 
		break;
		}
	} 
	return key_value;
}