function round(value,precision)
{
	var exp = Math.pow(10,precision);
	
	return Math.round(value*exp)/exp;
}

function roundAutoPrecision(value)
{
	var test = round(value,0).toString();
	if(test>0)
		return round(value,3-test.length);
	
	return round(value,2);
}

var initialRecipe = false;
var initialized = false;

function initialize()
{
	document.chooseForm.tinFromType.value=0;
	document.chooseForm.tinFromRoundDiameter.value = 25;
	document.chooseForm.tinFromSquareSize.value = 25;
	document.chooseForm.tinFromRectangleLength.value = 30;
	document.chooseForm.tinFromRectangleWidth.value = 22;

	document.chooseForm.tinToType.value=2;
	document.chooseForm.tinToRoundDiameter.value = 22;
	document.chooseForm.tinToSquareSize.value = 22;
	document.chooseForm.tinToRectangleLength.value = 23;
	document.chooseForm.tinToRectangleWidth.value = 32;
	
	document.chooseForm.tinRatio.value = 1.5;
	
	document.chooseForm.tinRecipe.value = "Idealne naleśniki:\r\n100ml śmietanki kremówki\r\n2 jajka\r\n125g mąki pszennej\r\n15 g cukru\r\n325 ml mleka\r\nszczypta soli";
	//document.chooseForm.tinRecipe.value = testRecipe();
		
	recalculate(document.chooseForm.tinRatio);
	recalculate(document.chooseForm.tinRecipe);
	
	document.chooseForm.tinRecipe.onpaste = handlePaste;
	
	initialRecipe = true;
	initialized = true;
}

var numberLabel = new Array();
var numberValue = new Array();

function addNumber(label,value)
{
	var index = numberLabel.length;
	numberLabel[index] = label;
	numberValue[index] = value;	
}

addNumber("1/2",0.5);
addNumber("½",0.5);
addNumber("1/3",0.333);
addNumber("⅓",0.333);
addNumber("2/3",0.666);
addNumber("⅔",0.666);
addNumber("1/4",0.25);
addNumber("¼",0.25);
addNumber("3/4",0.75);
addNumber("1/8",0.125);
addNumber("1½",1.5);
addNumber("1.1/2",1.5);
addNumber("1.1/4",1.25);
addNumber("2.1/2",2.5);
addNumber("2½",2.5);
addNumber("pół",0.5);
addNumber("połowa",0.5);
addNumber("jedna",1);
addNumber("jeden",1);
addNumber("dwa",2);
addNumber("dwie",2);
addNumber("trzy",3);
addNumber("cztery",4);
addNumber("pięć",5);
addNumber("sześć",6);
addNumber("siedem",7);
addNumber("osiem",8);
addNumber("dziewięć",9);
addNumber("dziesięć",10);
addNumber("tuzin",12);

var unitLabel = new Array();
var unitValue = new Array();

function addUnit(label,value)
{
	var index = unitLabel.length;
	unitLabel[index] = label;
	unitValue[index] = value;	
}

addUnit("g","g");
addUnit("gram","g");
addUnit("l","l");
addUnit("ml","ml");
addUnit("łyżki","łyżki");
addUnit("łyżka","łyżki");
addUnit("łyżeczka","łyżeczki");
addUnit("łyżeczki","łyżeczki");
addUnit("szklanka","szklanki");
addUnit("szklanki","szklanki");
addUnit("kulki","kulki");
addUnit("ziarna","ziarna");
addUnit("lb","lb");
addUnit("lbs","lb");
addUnit("pound","lb");
addUnit("pounds","lb");
addUnit("oz","oz");
addUnit("ounce","oz");
addUnit("ounces","oz");
addUnit("tsp","tsp");
addUnit("teaspoon","tsp");
addUnit("teaspoons","tsp");
addUnit("tbsp","tbsp");
addUnit("tablespoon","tbsp");
addUnit("tablespoons","tbsp");
addUnit("cup","cup");
addUnit("cups","cup");

var unitConvert = new Array();

function addUnitConvert(sourceUnit,targetUnit,ratio)
{
	var index = unitConvert.length;
	var unit = new Object();
	unit.sourceUnit = sourceUnit;
	unit.targetUnit = targetUnit;
	unit.ratio = ratio;
	unitConvert[index] = unit;
}

addUnitConvert("lb","kg",0.45359237);
addUnitConvert("oz","g",28.3495231);

var products = new Array();

function activateTinForms()
{
	document.getElementById("tinFromHead").style.removeProperty("display");

	var form = document.chooseForm;
	
	if(form.tinFromType.value==0)
		document.getElementById("tinFromRound").style.removeProperty("display");
	else
		document.getElementById("tinFromRound").style.display = "none";
		
	if(form.tinFromType.value==1)
		document.getElementById("tinFromSquare").style.removeProperty("display");
	else
		document.getElementById("tinFromSquare").style.display = "none";

	if(form.tinFromType.value==2)
		document.getElementById("tinFromRectangle").style.removeProperty("display");
	else
		document.getElementById("tinFromRectangle").style.display = "none";

	document.getElementById("tinToHead").style.removeProperty("display");
		
	if(form.tinToType.value==0)
		document.getElementById("tinToRound").style.removeProperty("display");
	else
		document.getElementById("tinToRound").style.display = "none";

	if(form.tinToType.value==1)
		document.getElementById("tinToSquare").style.removeProperty("display");
	else
		document.getElementById("tinToSquare").style.display = "none";

	if(form.tinToType.value==2)
		document.getElementById("tinToRectangle").style.removeProperty("display");
	else
		document.getElementById("tinToRectangle").style.display = "none";

	document.getElementById("tinActivateForm").style.display = "none";
}

function hideTinForms()
{
	document.getElementById("tinFromHead").style.display = "none";
	document.getElementById("tinFromRound").style.display = "none";
	document.getElementById("tinFromSquare").style.display = "none";
	document.getElementById("tinFromRectangle").style.display = "none";

	document.getElementById("tinToHead").style.display = "none";
	document.getElementById("tinToRound").style.display = "none";
	document.getElementById("tinToSquare").style.display = "none";
	document.getElementById("tinToRectangle").style.display = "none";

	document.getElementById("tinActivateForm").style.removeProperty("display");
}

function handlePaste(event) 
{
	setTimeout(() => 
	{  
		recalculate(document.chooseForm.tinRecipe);
	}, 200);
}

function recalculate(field)
{
	var form = field.form;

	var tinFrom, tinTo, tinRatio;
		
	if(field.id=="tinRecipeResult")
		return;
	
	if(field.type=="text" && (field.id.startsWith("tinFrom") || field.id.startsWith("tinTo") || field.id=="tinRatio" || field.id=="tinProductAmount"))
	{
		if(field.value.indexOf(',')>0)
			field.value = field.value.replace(',','.');

		var numberRegExp = new RegExp("^[0-9\.,]*$");		
		if(!numberRegExp.test(field.value))
			field.value = field.value.replace(/[^0-9\.,]*/ig,'');	
	
		//check for double decimal separator
		var firstSep = field.value.indexOf(".");
		var secondSep = firstSep>0?field.value.indexOf(".",firstSep+1):-1;
		if(firstSep>0 && secondSep>firstSep)
		{
			field.value = field.value.substring(0,secondSep);
		}
	
		if(field.value[field.value.length-1]=='.')
			return;
	}
	
	if(field.id.startsWith("tinFrom") || field.id.startsWith("tinTo"))
	{
		activateTinForms();
		
		if(form.tinFromType.value==0)
		{
			var radius = parseFloat(form.tinFromRoundDiameter.value)/2;
			if(form.tinFromRoundDiameterUnit.value==1) radius *= 2.54;  
		
			tinFrom = Math.PI * Math.pow(radius, 2);
		}

		if(form.tinFromType.value==1)
		{
			var size = parseFloat(form.tinFromSquareSize.value);
			if(form.tinFromSquareSizeUnit.value==1) size *= 2.54;
		
			tinFrom = Math.pow(size,2);
		}

		if(form.tinFromType.value==2)
		{
			var sizeLength = parseFloat(form.tinFromRectangleLength.value);
			if(form.tinFromRectangleLengthUnit.value==1) sizeLength *= 2.54;	
			var sizeWidth = parseFloat(form.tinFromRectangleWidth.value);
			if(form.tinFromRectangleWidthUnit.value==1) sizeWidth *= 2.54;
		
			tinFrom = sizeLength * sizeWidth;
		}

		if(form.tinToType.value==0)
		{
			var radius = parseFloat(form.tinToRoundDiameter.value)/2;
			if(form.tinToRoundDiameterUnit.value==1) radius *= 2.54;  
		
			tinTo = Math.PI * Math.pow(radius, 2);
		}

		if(form.tinToType.value==1)
		{
			var size = parseFloat(form.tinToSquareSize.value);
			if(form.tinToSquareSizeUnit.value==1) size *= 2.54;
		
			tinTo = Math.pow(size,2);
		}

		if(form.tinToType.value==2)
		{		
			var sizeLength = parseFloat(form.tinToRectangleLength.value);
			if(form.tinToRectangleLengthUnit.value==1) sizeLength *= 2.54;	
			var sizeWidth = parseFloat(form.tinToRectangleWidth.value);
			if(form.tinToRectangleWidthUnit.value==1) sizeWidth *= 2.54;
		
			tinTo = sizeLength * sizeWidth;
		}
		
	    tinRatio = tinTo/tinFrom;
	}
	else
	if(field.id == "tinRatio" || field.id == "tinRecipe" || field.id == "tinRecipeConvertUnits")
	{
		tinRatio = parseFloat(document.chooseForm.tinRatio.value);
		hideTinForms();
	}
	else
	{
		if(field.id == "tinProducts")
		{
			if(products[document.chooseForm.tinProducts.value].unit)
				document.getElementById("tinProductUnit").innerHTML = products[document.chooseForm.tinProducts.value].unit;
			else
				document.getElementById("tinProductUnit").innerHTML = "";
				
			document.chooseForm.tinProductAmount.value = round(products[document.chooseForm.tinProducts.value].amount * document.chooseForm.tinRatio.value,2);
		}
		
		if(field.id == "tinProductAmount" || field.id == "tinProducts")
			tinRatio = document.chooseForm.tinProductAmount.value / products[document.chooseForm.tinProducts.value].amount;
		
		hideTinForms();
	}

	if(!tinRatio || Number.isNaN(tinRatio))
		return;
	
	document.chooseForm.tinRatio.value = round(tinRatio,2);
		
	if(field.id == "tinRecipe")
	{	
		var recipe = document.chooseForm.tinRecipe.value;
		recipeLines = recipe.split(/[\r\n]+/);
		
		products = new Array();
	
		for(var i = 0; i<recipeLines.length; i++)
		{
			var product = parseRecipeLine(recipeLines[i]);
			if(product)
			{
				products[products.length] = product;
			}
		}
	
		document.chooseForm.tinRecipe.rows = Math.max(Math.min(products.length+3, 30),10);
		document.chooseForm.tinRecipeResult.rows = document.chooseForm.tinRecipe.rows;
	
		fillProducts();
	}
	
	var result = "";
	for(var i = 0; i<products.length; i++)
	{
		product = products[i];

		var convertedAmount = product.amount;
		var convertedUnit = product.unit;
		
		if(product.unit && tinRecipeConvertUnits.checked)
		{
			var convert = getConvertUnit(product);
			if(convert)
			{
				convertedUnit = convert.targetUnit;
				convertedAmount *= convert.ratio;
			}
		}
		
		if(convertedAmount)
			result += roundAutoPrecision(tinRatio*convertedAmount) + " ";
		
		if(convertedUnit)
			result += convertedUnit + " ";
				
			result += product.name;
			result += "\r\n";
	}
	document.chooseForm.tinRecipeResult.value = result;
	
	if(initialized)
		gTrackEvent("bakingtins","recalculate",field.id);
}

function getConvertUnit(product)
{
	if(!product.unit)
		return;
	
	for(var i = 0; i<unitConvert.length; i++)
	{
		if(product.unit == unitConvert[i].sourceUnit)
			return unitConvert[i];
	}
}

function parseRecipeLine(line)
{
	line = line.replace(/(\d+)\s([½⅓⅔¼])/ig, "$1$2");
	line = line.replace(/(\d+)\s(\d\/\d)/ig, "$1.$2");

	var tokens = line.split(/[ \t]+/);
	var product = new Object();
	product.name = "";
	for(var i = 0; i<tokens.length; i++)
	{
		if(tokens[i].length==0) continue;
		
		if(!product.amount)
		{
			parseAmount(product,tokens[i]);
			
			if(product.amount)
				continue;
		}
		
		if(!product.unit)
		{
			parseUnit(product,tokens[i]);
			if(product.unit)
				continue;
		}
		
		product.name += tokens[i] + " ";
	}
	if(product.name)
	{
		product.name = product.name.trim();
		return product;
	}
		
	return;
}

var numberRegExp = new RegExp("^[0-9\.,]*$");
var amountUnitRegExp = new RegExp("^([0-9\.,]+)(.*)$");

function parseAmount(product,token)
{
	if(numberRegExp.test(token))
	{
		token = token.replace(",",".");
		product.amount = token;
		return;
	}
		
	for(var i=0; i<numberLabel.length; i++)
		if(numberLabel[i] == token.toLowerCase()) 
		{
			product.amount = numberValue[i];
			return;
		}
	
	var parts = token.match(amountUnitRegExp);

	if(parts && parts.length==3)
	{
		parseUnit(product,parts[2]);
		if(product.unit)
			product.amount = parts[1];
	}
	
	return;
}

function parseUnit(product,token)
{
	for(var i = 0; i < unitLabel.length; i++)
		if(unitLabel[i].toLowerCase() == token.toLowerCase())
			product.unit = unitValue[i];
			
	return;
}

function fillProducts()
{
	var productsSelect = document.chooseForm.tinProducts;
	var selectedProduct = "";
	var selectedIndex = 0;
	
	if(productsSelect.options.length>0)
		selectedProduct = productsSelect.options[productsSelect.selectedIndex].text.trim();
	
	productsSelect.options.length = 0;
	for(var i=0; i < products.length; i++) 
	{
		if(products[i].amount)
			productsSelect.options[productsSelect.options.length] = new Option(products[i].name,i);
		if(products[i].name == selectedProduct)
		{
			selectedIndex = productsSelect.options.length-1;
			productsSelect.options[selectedIndex].selected = true;
		}
	}
	
	if(productsSelect.options.length == 0)
	{
		document.getElementById("tinProductUnit").innerHTML = "";
		document.chooseForm.tinProductAmount.value = "";
		return;
	}
	
	if(products[productsSelect.options[selectedIndex].value].unit)
		document.getElementById("tinProductUnit").innerHTML = products[productsSelect.options[selectedIndex].value].unit;
	else
		document.getElementById("tinProductUnit").innerHTML = "";
	
	document.chooseForm.tinProductAmount.value = round(products[productsSelect.options[selectedIndex].value].amount * document.chooseForm.tinRatio.value,2);
}

function clearInitialRecipe()
{
	if(initialRecipe)
	{
		document.chooseForm.tinRecipe.value = "";
		initialRecipe = false;
	}
}

function testRecipe()
{
	var recipe = "To jest przepis\r\n";
	recipe += "3 żółtka\r\n";
	recipe += "30g cukru pudru\r\n";
	recipe += "pół łyżeczki proszku do pieczenia\r\n";
	recipe += "1 łyżeczka ekstraktu wanil. (lub około 8g cukru)\r\n";
	recipe += "150 g mąki pszennej\r\n";
	recipe += "      100 g masła\r\n";
	recipe += "3,5 oz masła\r\n";
	recipe += "3 duże jajka\r\n";
	recipe += "3/4 szklanki mleka       \r\n";
	recipe += "1/2 szklanki mąki pszennej\r\n";
	recipe += "1/4 łyżeczki soli\r\n";
	recipe += "2 łyżki cukru wan (dom prod)\r\n";
	recipe += "1,5 łyżeczki soku z cytryny\r\n";
	recipe += "szczypta soli\r\n";
	recipe += "Pół papryczki chili, drobno posiekanej \r\n";
	recipe += "2lb chudej wołowiny (użyłam udźca )\r\n";
	recipe += "2 kartoniki siekanych pomidorów(2 x 400 g)\r\n";
	recipe += "3 kulki ziela angielskiego\r\n";
	recipe += "pół łyżeczki mielonej kolendry\r\n";
	recipe += "1 łyżeczka suszonego oregano\r\n";
	recipe += "1/8 łyżeczki mielonego cynamonu\r\n";
	recipe += "Sól do smaku\r\n";
	recipe += "125 ml mleka kokosowego\r\n";

	return recipe;
}

function selectInput(field)
{
	addClass(field,"input_selected");
	
	for(var i = 0; i < document.forms.length; i++)	
		for(var j = 0; j < document.forms[i].elements.length; j++)
   	{
			var currentElement = document.forms[i].elements[j];
		
			if(currentElement == field)
				continue;
			
			removeClass(currentElement,"input_selected");
		}
}

function addClass(item, classname) 
{
    var obj = item
    if (typeof item=="string") {
        obj = document.getElementById(item)
    }
    obj.className += " " + classname
}

function removeClass(item, classname) 
{
    var obj = item
    if (typeof item=="string") {
        obj = document.getElementById(item)
    }
    var classes = ""+obj.className
    while (classes.indexOf(classname)>-1) {
        classes = classes.replace (classname, "")
    }
    obj.className = classes
}

Number.prototype.toMoney = function(decimals, decimalSeparator, thousandsSeparator)
{ 
   var n = this;
   c = isNaN(decimals) ? 2 : Math.abs(decimals);
   d = decimalSeparator || '.';
   t = (typeof thousandsSeparator === 'undefined') ? ' ' : thousandsSeparator;
   sign = (n < 0) ? '-' : '',

   i = parseInt(n = Math.abs(n).toFixed(c)) + '', 
   j = ((j = i.length) > 3) ? j % 3 : 0; 

   return sign + (j ? i.substr(0, j) + t : '') + i.substr(j).replace(/(\d{3})(?=\d)/g, "$1" + t) + (c ? d + Math.abs(n - i).toFixed(c).slice(2) : ''); 
}

String.prototype.startsWith = function (str)
{
    return this.indexOf(str) == 0;
};