var items  = 0;
var pieces = 0;
var money  = 0;
var vyberOrigin;
var personOrgFee = 80;
var lastPiecesValue;

onload = init

function init() {
	vyberOrigin = document.getElementById('vyber').innerHTML;
	if (screen.width < 1024) { 
		document.getElementById('krok-3-offer').style.display = 'none';
		for (n=1;n<=3;n++) document.getElementById('footer-'+n).style.display = 'none';
	}
	writeMoney();
}
function addProduct(id) {
	if (!document.getElementById('p'+id)) {
		var item  = '<div class="l"><div class="pname">'+Produkty[id][1]+'</div><div class="links">›&nbsp;<a href="#" onclick="openDetail('+id+')">Detail</a></div></div>\n';
		item += '<div class="r"><div>\n';
		item += '	<p>Počet&nbsp;ks</p>\n';
		item += '	<input type="text" id="p'+id+'pieces" name="p'+id+'pieces" value="0" maxlength="2" onfocus="lastPiecesValue = this.value" onchange="addPiece('+id+', parseInt(this.value - lastPiecesValue), false)">\n';
		item += '	<a href="#" onclick="addPiece('+id+', -1, true)"><img src="/img/u/deti/kalkulacka/btn_smazat.gif" alt="Smazat" width="14" height="14" border="0"></a>\n';
		item += '</div></div>\n';
		item += '<div class="clear">&nbsp;</div>\n';

		var eVyber 		= document.getElementById('vyber');
		var eProduct 	= document.createElement('div');
		if (eVyber && eProduct) {
			eProduct.id = 'p'+id;
			eProduct.innerHTML = item;
			eProduct.className = 'item';
			if (items == 0) eVyber.innerHTML = '';
			if (eVyber.appendChild(eProduct)) items++;
		}
	}
	addPiece(id, 1, true);
}
function removeProduct(id) {
	var eVyber 		= document.getElementById('vyber');
	var eProduct 	= document.getElementById('p'+id);
	if (eVyber && eProduct) {
		try {
			eVyber.removeChild(eProduct);
			if (items - 1 == 0) eVyber.innerHTML = vyberOrigin;
		} catch(e) {
			return false;
		}
		items--;
		return true;
	}
}
function removeAllProduct() {
	items  = 0;
	pieces = 0;
	money  = 0;
	writeMoney();
	var eVyber = document.getElementById('vyber');
	if (eVyber) eVyber.innerHTML = vyberOrigin;
}

function getMoney(id, num) {
	money = money + num * Produkty[id][2];
	writeMoney();
}
function writeMoney() {
	var orgFee = 0;
	
//	var ePiecesSum = document.getElementById('pieces-sum');
//	if (ePiecesSum) ePiecesSum.innerHTML = indentNum(pieces) + '&nbsp;ks';

	var eChildNum = document.getElementById('childNum');
	var eOrgFee   = document.getElementById('orgFee');
	if (eChildNum && eOrgFee) {
		if (parseInt(eChildNum.value) < 0) eChildNum.value = 0;
		if (isNaN(eChildNum.value)) eChildNum.value = 1;
		orgFee = eChildNum.value * personOrgFee;
		eOrgFee.innerHTML = indentNum(orgFee) + '&nbsp;Kč';
	}

	if (money < 0) money = 0;
	var eMenuPrice = document.getElementById('menuPrice-step2');
	if (eMenuPrice) eMenuPrice.innerHTML = indentNum(money) + '&nbsp;Kč';
	var eMenuPrice = document.getElementById('menuPrice-step3');
	if (eMenuPrice) eMenuPrice.innerHTML = indentNum(money) + '&nbsp;Kč';

	var eTotalPrice = document.getElementById('price-sum');
	if (eTotalPrice) eTotalPrice.innerHTML = indentNum(parseInt(orgFee + money)) + '&nbsp;Kč';
}

function addPiece(id, pCountDifference, incPValue) {
	var pRealDifference;
	var ePieces = document.getElementById('p'+id+'pieces');

	if (ePieces && parseInt(ePieces.value) >= 0) {
		var tmpPiecesValue = (incPValue) ? ePieces.value : lastPiecesValue;

		if (pCountDifference > 0 && parseInt(tmpPiecesValue) >= 0 && parseInt(tmpPiecesValue) < 99) {
			pieces += pRealDifference = (parseInt(tmpPiecesValue) + pCountDifference > 99) ? parseInt(tmpPiecesValue) - 99 : pCountDifference;
			if (incPValue) ePieces.value = parseInt(tmpPiecesValue) + pRealDifference;
			getMoney(id, pRealDifference);

		} else if (pCountDifference < 0 && parseInt(tmpPiecesValue) > 1 && ePieces.value > 0) {
			pieces += pRealDifference = (parseInt(tmpPiecesValue) + pCountDifference < 1) ? parseInt(tmpPiecesValue) - 1 : pCountDifference;
			if (incPValue) ePieces.value = parseInt(tmpPiecesValue) + pRealDifference;
			getMoney(id, pRealDifference);

		} else if (pCountDifference < 0) {
			if (removeProduct(id)) {
				pieces += -1;
				getMoney(id, pCountDifference);
			}
		}

		if (ePieces.value) lastPiecesValue = ePieces.value;

	} else if (ePieces) {
		pieces += pRealDifference = 0 - parseInt(lastPiecesValue);
		ePieces.value = 0;
		if (removeProduct(id)) pieces += -1;
		getMoney(id, pRealDifference);
	}
}

function openDetail(id) {
	var html = '	<img name="produkt-img" src="" alt="" width="214" height="132" border="0"><br>\n';
	html += '	<div class="text">\n';
	html += '		<div id="produkt" class="pname"></div>\n';
	html += '		<div id="p-slozeni">\n';
	if (Produkty[id][3]) {
		html += '			<div class="popis2">Složení:</div>\n';
		html += '			<div id="slozeni" class="indent-bottom"></div>\n';
	}
	html += '			<div class="l"><div class="popis2">Cena: <span>'+Produkty[id][2]+' Kč</span></div></div>\n';
	html += '			<div class="r"><div class="close"><a href="#" onclick="closeDetail()"><img src="/img/u/deti/kalkulacka/btn_smazat.gif" alt="Zavřít" width="14" height="14" border="0"></a></div></div>\n';
	html += '			<div class="clear">&nbsp;</div>\n';
	html += '		</div>\n';
	html += '	</div>\n';

	var eDetail		= document.getElementById('detail');
	var eContainer	= document.createElement('div');
	if (eDetail && eContainer) {
		eContainer.innerHTML = html;
		eContainer.className = 'cont';
		try {
			eDetail.innerHTML = '';
			eDetail.appendChild(eContainer);
		} catch(e) {}
	}
	document.images["produkt-img"].src = "/img/u/deti/kalkulacka/produkty/prod_"+Produkty[id][0]+".jpg";
	obj("produkt").innerHTML = Produkty[id][1];
	if (Produkty[id][3]) obj("slozeni").innerHTML = Produkty[id][3];
	obj("detail").style.visibility = "visible";
}
function closeDetail() {
	obj("detail").style.visibility = "hidden";
	obj("detail").innerHTML = '';
}

function indentNum(num) {
	var num = new String(num);
	var numBackup = num;
	var temp = new String;

	for (n=num.length; n>0; n--)		// vrati invertni cislo (1234 => 4321)
		temp += num.substring(n-1,n);

	regexp = /\d{3}/g;
	if (temp.replace(regexp,"$& ").indexOf('&') == -1) { // osetreni pro IE 5.0 - nechape vyraz '$&'
		temp = temp.replace(regexp,"$& "); 	// vlozi za kazdy treti znak mezeru
		var num = new String;
		for (n=temp.length; n>0; n--) 		// vrati invertni cislo (432 1 => 1 234)
			num += temp.substring(n-1,n);
	} else num = numBackup;

	if (num == '') num = 0;
	return num;
}