var bought = new Array();
var prods = new Array();
var tot = 0;

function pricernd(price) {
	price = price * 100;
	Math.round(price);
	price = price / 100 + '';
	if(price.indexOf(".") != -1) {
		price = price.split(".");
		if(price[1].length == 1) price[1] += "0";
		if(price[1].length > 2) price[1] = price[1].substr (0,2);
		price = price[0] + "." + price[1];
	}
	return price;
}

function buy(item) {
	if(prods[item]) {
		prods[item]['tot']++;
	}
	else {
		prods[item] = new Array();
		prods[item]['tot'] = 1;
		prods[item]['name'] = document.getElementById('name_' + item).innerHTML;
		prods[item]['price'] = document.getElementById('price_' + item).innerHTML;
		bought[bought.length] = item;
	}
	updatebasket();
}
function removeprod(item) {
	if(prods[item]) {
		prods[item]['tot']--;
	}
	updatebasket();
}

function updatebasket() {
	var itemprice;
	var totprice = 0;
	var output = "";
	for(var i = 0; i < bought.length; i++) {
		if(prods[bought[i]]['tot'] != 0) {
			itemprice = prods[bought[i]]['tot'] * prods[bought[i]]['price'];
			itemprice = pricernd(itemprice);
			totprice += itemprice * 1;
			output += prods[bought[i]]['tot'] + "x " + prods[bought[i]]['name'] + ": &pound;" + itemprice + " <span onclick=\"removeprod('" + bought[i] + "'); return false;\" class=\"rem\">(-)</span><br/>";
		}
		cook(bought[i], prods[bought[i]]['tot']);
	}
	
	if(output == "") output = "Your basket is currently empty.";
	else {
		totprice = pricernd(totprice);
		output += "<b>Total: &pound;" + totprice + "</b>";
	}
	document.getElementById('basket').innerHTML = output;
	
}

function cook(productid, quantity) {
	var exdate=new Date();
	exdate.setDate(exdate.getDate() + 365);
	document.cookie = "product_" + productid + "=" + quantity + "; expires=" + exdate + "; path=/";
}

function loadcookies() {
	var cookies = document.cookie.split("; ");
	var curcook;
	var prodid;
	for(var i = 0; i < cookies.length; i++) {
		if(cookies[i].indexOf('product_') == 0) {
			curcook = cookies[i].split("=");
			prodid = curcook[0].replace(/product_/, "");
			prods[prodid] = new Array();
			prods[prodid]['tot'] = curcook[1];
			prods[prodid]['name'] = document.getElementById('name_' + prodid).innerHTML;
			prods[prodid]['price'] = document.getElementById('price_' + prodid).innerHTML;
			bought[bought.length] = prodid;
		}
	}
}