// Функция установки значения cookie.
function setCookie(name, value, path, expires, domain, secure) {
  var curCookie = name + "=" + escape(value) +
    ((expires) ? "; expires=" + expires.toGMTString() : "") +
    ((path) ? "; path=" + path : "; path=/") +
    ((domain) ? "; domain=" + domain : "") +
    ((secure) ? "; secure" : "");
  document.cookie = curCookie;
}

// Функция чтения значения cookie.
function getCookie(name) {
  var prefix = name + "=";
  var cookieStartIndex = document.cookie.indexOf(prefix);
  if(cookieStartIndex == -1) return null;
  var cookieEndIndex = document.cookie.indexOf(";", cookieStartIndex + prefix.length);
  if(cookieEndIndex == -1) cookieEndIndex = document.cookie.length;
  return unescape(document.cookie.substring(cookieStartIndex + prefix.length, cookieEndIndex));
}

function stripChar(str) {
	return str.replace(/[^0-9.]+/, "");
}

function clear() {
	setCookie('cnt_prods', '');
	setCookie('prods', '');
	var prods = document.prods.prod;
	if (prods) {
	for(i=0; i<prods.length; i++) {
		prods[i].checked = false;
	} }
	document.prods.cnt_prd.value = "";
}
function delProd(val) {
	var prods=getCookie('prods');
	if(prods.indexOf(val)>0) {
		var re = new RegExp("sep"+val);
	} else {
		if(getCookie('cnt_prods')<2) {
			var re = new RegExp(val);
		} else {
			var re = new RegExp(val+"sep");
		}
	}
	prods = prods.replace(re,'');
	if (prods) {
		setCookie('prods', prods);
	} else {
		setCookie('prods', '');
	}
	var cnt_prods=getCookie('cnt_prods');
	cnt_prods--;
	if (cnt_prods) {
		setCookie('cnt_prods', cnt_prods);
	} else {
		setCookie('cnt_prods', '');
	}
}

//Функция добавления или удаления продукта в/из Comparison Box
function addProd(obj) {
	if(document.cookie){
		if(obj.checked==true) {
			document.prods.cnt_prd.value++;
			if(getCookie('cnt_prods')<6) {
				if(getCookie('prods')) {
					var prods=getCookie('prods');
					prods += ((prods!='')?'sep':'')+obj.value;
					setCookie('prods', prods);
				} else {
					setCookie('prods', obj.value);
				}
				if(getCookie('cnt_prods')) {
					var cnt_prods=getCookie('cnt_prods')
					cnt_prods++;
					setCookie('cnt_prods', cnt_prods);
				} else {
					setCookie('cnt_prods', 1);
				}
			} else {
				alert("max 6 products!")
				obj.checked = false;
				document.prods.cnt_prd.value--;
			}
		} else {
			document.prods.cnt_prd.value--;
			delProd(obj.value)
		}
	} else {
		alert("for use of tool enable cookies");
		obj.checked = false;
	}
}

//Функция проверки выбран ли хотя бы один продукт
function is_checked() {
	if(getCookie('cnt_prods')<=1) {
		alert("Please, choose more than one product.");
		return false;
	}
}

//функция скрытия/показа групп атрибутов
function show_hide(className) {
	var elms = document.getElementsByClassName(className);
	for(i=0; i<elms.length; i++) {
		if (elms[i].style.display) {
			elms[i].style.display = '';
		} else {
			elms[i].style.display = 'none';
		}
	}
}

//Функция удаления продукта из Comparison Box
function del(obj, id) {
	if (confirm("Are you sure?")) {
		var table = $("compare");
		var ncell = obj.parentNode.cellIndex;
		for (i = 0; i < table.rows.length; i++) {
			table.rows[i].deleteCell(ncell);
		}
		recount_best();
		delProd(id);
		document.prods.cnt_prd.value--;
	}
}

var best_val = new Array(
	"min",
	"max",
	"min",
	"max",
	"min",
	"null",
	"yes",
	"yes",
	"yes",
	"yes",
	"yes",
	"yes",
	"null",
	"min",
	"min",
	"min",
	"min",
	"min"
);

//Функция пересчета наилучших атрибутов
function recount_best() {
	var table = $("compare");
	var n = new Array();
	for(i=7; i<table.rows.length-1; i++) {
		if(best_val[i-7]!=null) {
			n[i] = new Array(false,false,false,false,false,false);
			row = table.rows[i];
			switch(best_val[i-7]) {
				case "min":
					min = 1000;
					for(j=1; j<row.cells.length; j++) {
						cell = row.cells[j];
						if(parseFloat(stripChar(cell.innerHTML))<=min && stripChar(cell.innerHTML)!="") {
							if(parseFloat(stripChar(cell.innerHTML))<min) {
								n[i] = new Array(false,false,false,false,false,false);
								min = parseFloat(stripChar(cell.innerHTML));
							}
							n[i][j] = true;
						} else n[i][j] = false;
					}
				break;
				case "max":
					max = -1;
					for(j=1; j<row.cells.length; j++) {
						cell = row.cells[j];
						if(parseFloat(stripChar(cell.innerHTML))>=max && stripChar(cell.innerHTML)!="") {
							if(parseFloat(stripChar(cell.innerHTML))>max) {
								n[i] = new Array(false,false,false,false,false,false);
								max = parseFloat(stripChar(cell.innerHTML));
							}
							n[i][j] = true;
						} else n[i][j] = false;
					}
				break;
				default:
					for(j=1; j<row.cells.length; j++) {
						cell = row.cells[j];
						if(cell.innerHTML==best_val[i-7]) {
							n[i][j] = true;
						} else n[i][j] = false;
					}
				break;
			}
			all = true;
			for(j=1; j<row.cells.length; j++) {
				if(n[i][j]==false) {
					all = false;
					break;
				}
			}
			if(all)
			n[i] = new Array(false,false,false,false,false,false);
		}
	}
	for (i = 7; i < table.rows.length - 1; i++) {
		for (j = 1; j < table.rows[i].cells.length; j++) {
			if (n[i][j]) {
				table.rows[i].cells[j].className = "best";
			} else {
				table.rows[i].cells[j].className = "";
			}
		}
	}
}