function useTexture(src) {
	var canvas = document.getElementById('myCanvas');
	var img = new Image();
	img.onload = function() {
		if (canvas.getContext) {
			var context = canvas.getContext('2d');
			context.clearRect(0, 0, canvas.width, canvas.height);
			context.drawImage(img, 0, 0, canvas.width, canvas.height);
			canvas.parentNode._x3domNode.invalidateGLObject();
		}
	}
	img.src = src;

}

function uploadSkin(e) {
	e.preventDefault();
	e.stopPropagation();
	var author = this.author.value;
	var name = this.name.value;
	var license = this.license.value;
	var img = this.img.value;
	xhr.request(this.action, "author=" + author + "&name=" + name + "&license=" + license + "&img=" + img, uploaded);
	//alert("hi "+this.name.value+",n thanks that you want to upload your skin. but the upload function is not ready atm.")
	return false
}

function uploaded(http) {
	if (http.status == 200) {

		if (JSON.parse(http.responseText)) {
			var answer = JSON.parse(http.responseText)
			if (answer.success) {
				alert("uploaded successfull");
			} else {
				alert("Error: " + answer.status_msg);
			}
		} else {
			alert("Something is wrong: the answer of the server is " + http.getResponseText())
		}

	} else {
		alert("Something is wrong: the answer of the server is " + http.status + " " + http.statusText)
	}

}

function abort() {

	var childNode = this.parentNode;
	childNode.parentNode.removeChild(childNode);
}

/* ==========================================================================
 Drag & drop file handler
 ========================================================================== */

function handleFileSelect(evt) {
	evt.stopPropagation();
	evt.preventDefault();

	var dateien = (this.id == 'skinlist') ? evt.dataTransfer.files : evt.target.files;
	// jenachdem ob ueber drag drop oder durchsuchen ausgewaehlt wurde.
	//in dateien sind jetzt alle dateien gespeichert die ausgewahlt wurden
	for (var i = 0, f; f = dateien[i]; i++) {//alle dateien nacheinander auslesen...
		if (!f.type.match('image.*')) {//fals was anderes als ein bild dabei sein sollte
			alert("tFEHLER!nn Die Datei " + f.name + " kann nicht als Bild geöffnet werden!");
			continue;
		}

		var reader = new FileReader();

		// wenn die datei geladen ist dann soll die gleich in ein img tag geschrieben werden
		reader.onload = (function(Datei) {
			return function(e) {
				// Vorschau bzw. thumbnail rendern
				var block = document.createElement('div');
				block.className = "option"
				var img = new Image();
				img.className = 'thumb';
				//css klasse zuweisen fuers aussehen ;)
				img.src = e.target.result;
				//das ist die data:// url fuer die vorschau
				img.title = Datei.name;
				//als titel noch der dateiname.
				img.addEventListener('click', function() {
					useTexture(img.src)
				}, false);
				//bild ende
				var form = document.createElement('form');
				form.action = "upload.php";
				form.method = "get";
				form.addEventListener('submit', uploadSkin, false);
				form.addEventListener('reset', abort, false);
				var titel = document.createElement('span');
				titel.innerHTML = "Name: <input type='text' placeholder='please enter a name' name='name' required><br>";
				//titel Ende
				var eigenschaften = document.createElement('span');
				eigenschaften.innerHTML = "Author: <input type='text' placeholder='enter the name of the Author' name='author' required> <br>" + "License: <input type='text' placeholder='enter the license under that you would share this' name='license' required><br>" + "Mime Type: " + Datei.type + "<br>" + "Size: " + Datei.size / 1024 + " Kb<br>" + "<input type='hidden' value='" + img.src + "' name='img'>" + "<button type='submit' class='addimg'>Upload!</button><button type='reset' class='abort'>discard!</button>";
				//Eigenschaften ende
				block.insertBefore(img, null);
				//das bild ins div schieben.
				form.insertBefore(titel, null);
				//titel einfügen
				form.insertBefore(eigenschaften, null);
				//zu guter letzt die Eigenschaften
				block.insertBefore(form, null);
				//zu guter letzt die Eigenschaften
				document.getElementById('skinlist').insertBefore(block, document.getElementById("dnd"));
				//anschliessend den block einfuegen
			};
		})(f);

		reader.readAsDataURL(f);

	}
}

function handleDragOver(evt) {
	evt.stopPropagation();
	evt.preventDefault();
	evt.dataTransfer.dropEffect = 'copy';
}

function initDragDrop() {
	// Event listener Eintragen
	var dropZone = document.getElementById('skinlist');
	dropZone.addEventListener('dragover', handleDragOver, false);
	dropZone.addEventListener('drop', handleFileSelect, false);
	document.getElementById('files').addEventListener('change', handleFileSelect, false);
}

document.addEventListener('DOMContentLoaded', initDragDrop, false);

/* ==========================================================================
 load skins and write them
 ========================================================================== */

function clearList() {
	copy = document.getElementById('dnd').outerHTML;
	document.getElementById('skinlist').innerHTML = copy;
}

function getSkins(page) {

	xhr.request("getskins.php", page, gotSkins);
}

function gotSkins(http) {
	if (http.status == 200) {

		if (JSON.parse(http.responseText)) {
			var answer = JSON.parse(http.responseText)
			var elem = document.getElementById("page");
			for (var i = 1; i <= answer.pages; i++) {

				var option = new Option(i, i)

				elem.options[i - 1] = option;
			}
			document.getElementById("max_pages").value = answer.pages;
			elem.selectedIndex = answer.page - 1;
			if (answer.page >1) {
				var block = document.createElement('div');
				block.innerHTML = "go back to <a href='#!page:"+ (answer.page-1) +"'> page "+(answer.page-1)+"</a> ";
				block.className = "option"
				document.getElementById('skinlist').insertBefore(block, null);
			}
			var i = 0;
			while (answer.data[i]) {
				var block = document.createElement('div');
				block.className = "option"
				var img = new Image();
				img.className = 'thumb';
				//css klasse zuweisen fuers aussehen ;)
				img.src = "data:" + answer.data[i].type + ";base64," + answer.data[i].img;
				//das ist die data: url fuer die vorschau
				img.title = answer.data[i].name;
				//als titel noch der dateiname.
				img.addEventListener('click', function() {
					useTexture(this.src)
				}, false);
				//bild ende

				var titel = document.createElement('span');
				titel.innerHTML = "Name: <a href='#!page:1,filtertype:Name,filter:" + answer.data[i].name + "'>" + answer.data[i].name + "</a><br>";
				titel.className = "autor"
				//titel Ende
				var eigenschaften = document.createElement('span');
				eigenschaften.innerHTML = "<button onclick='download(" + answer.data[i].id + ")' class='download'>&nbsp;Download</button> " + "<button onclick='permalink(" + answer.data[i].id + ")' class='permalink'>&nbsp;Permalink</button> <br>" + "Author: <a href='#!page:1,filtertype:Author,filter:" + answer.data[i].author + "'>" + answer.data[i].author + "</a> <br>" + "License: <a href='#!page:1,filtertype:License,filter:" + answer.data[i].license + "'>" + answer.data[i].license + "</a> <br>" + "Uploaded at: " + dateFormat(answer.data[i].uploaded) + "<br>";

				//Eigenschaften ende
				block.insertBefore(img, null);
				//das bild ins div schieben.
				block.insertBefore(titel, null)
				block.insertBefore(eigenschaften, null);
				//zu guter letzt die Eigenschaften
				document.getElementById('skinlist').insertBefore(block, null);
				//anschliesend den block einfuegen
				i++
			}

			if (answer.page < answer.pages) {
				var block = document.createElement('div');
				block.innerHTML = "End of page "+ answer.page + ". <br><a href='#!page:"+ (answer.page+1) +"'>continue on the next page</a> ";
				block.className = "option"
				document.getElementById('skinlist').insertBefore(block, null);
			} ;
			if (answer.data.length < 1) {
				alert("noting found matching your filter!")
			} else {
				useTexture("data:" + answer.data[0].type + ";base64," + answer.data[0].img);
			}
		} else {
			alert("Something is wrong: the status of http is: " + http.getResponseText())
		}

	} else {
		alert("Something is wrong: the answer of the server is " + http.status + " " + http.statusText)
	}

}

//document.addEventListener("DOMContentLoaded", function(){ getSkins(1) }, false);

/* ==========================================================================
 read the anchor
 ========================================================================== */

function anchor() {

	if (string != location.hash) {
		onAnchorChange();
		string = location.hash;
	}
	checkAnchor = setTimeout(anchor, delay);
}

string = null;
delay = 100;
checkAnchor = null;
//setTimeout(anchor, delay);
document.addEventListener("DOMContentLoaded", anchor, false);
function onAnchorChange() {
	var string = location.hash;
	if (string.indexOf('#!searchAuthor:') != -1) {
		cmd = string.split(':');
		clearList();
		getSkins("page=1&search=Author&Author=" + cmd[1]);
		document.getElementById('filter').value = cmd[1];

		document.getElementById('filtertype').selectedIndex = 1;
		//alert("the feature 'find more from Author'("+cmd[1]+") comming soon!")

	} else if (string.indexOf('#!') != -1) {
		cmd = string.split('!');
		obj = parseQuery(cmd[1])
		console.debug(obj);
		clearList();
		var get = ""
		if (obj.page)
			get += "page=" + obj.page + "";
		if (obj.filtertype && obj.filter) {
			get += "&filtertype=" + obj.filtertype + "&filter=" + obj.filter + "";
			document.getElementById('filter').value = obj.filter;
			switch(obj.filtertype) {
				case "Author":
					document.getElementById('filtertype').selectedIndex = 1;
					break;
				case "License":
					document.getElementById('filtertype').selectedIndex = 2;
					break;
				case "Id":
					document.getElementById('filtertype').selectedIndex = 3;
					break;
				case "Name":
					document.getElementById('filtertype').selectedIndex = 4;
					break;
				default:
					document.getElementById('filtertype').selectedIndex = 0;
					break;
			}
		}
		getSkins(get);

	} else {
		clearList();
		getSkins("page=1");
		document.getElementById('filter').value = '';
		document.getElementById('filtertype').selectedIndex = 0;

	}
}

function parseQuery(qstr) {
	var query = {};
	var a = qstr.split(',');
	for (var i in a) {
		var b = a[i].split(':');
		query[decodeURIComponent(b[0])] = decodeURIComponent(b[1]);
	}

	return query;
}

/* ==========================================================================
 skinlist buttons
 ========================================================================== */

function download(id) {
	window.open('/download.php?id=' + id, '_blank')
	//alert("the function 'download button' comming soon! use rightclick and 'save image' instead");
}

function permalink(id) {
	window.prompt("this is your permamentlink to the skin file. just copy it and share it with other people.", location.protocol + location.hostname + location.pathname + "#!page:1,filtertype:Id,filter:" + id);

}

/* ==========================================================================
 toolbar functions
 ========================================================================== */

function resetView() {
	document.getElementById('3dprev').runtime.resetView();
}

function getScreenshot() {
	screenshot = document.getElementById('3dprev').runtime.getScreenshot();
	window.open(screenshot, '_blank', "width=512,height=512")
}

function dateFormat(mysqldate) {
	var date = Date.createFromMysql(mysqldate);
	console.debug(date);
	return mysqldate;
	//todo! shuld output something like "just now" or "today at 17:30" or "12.12.12"
}

function goPage(page){
	location.hash = "#!page:"+page;
}

Date.createFromMysql = function(mysql_string) {
	if ( typeof mysql_string === 'string') {
		var t = mysql_string.split(/[- :]/);

		//when t[3], t[4] and t[5] are missing they defaults to zero
		return new Date(t[0], t[1] - 1, t[2], t[3] || 0, t[4] || 0, t[5] || 0);
	}

	return null;
}