/**
 * jquery.numberformatter - Formatting/Parsing Numbers in jQuery
 * Written by Michael Abernethy (mike@abernethysoft.com)
 *
 * Dual licensed under the MIT (MIT-LICENSE.txt)
 * and GPL (GPL-LICENSE.txt) licenses.
 *
 * Date: 1/26/08
 *
 * @author Michael Abernethy
 * @version 1.1.0
 *
 *
 * This plugin can be used to format numbers as text and parse text as Numbers
 * Because we live in an international world, we cannot assume that everyone
 * uses "," to divide thousands, and "." as a decimal point.
 *
 * The format() function will take the text within any selector by calling
 * text() or val() on them, getting the String, and applying the specified format to it.
 * It will return the jQuery object
 *
 * The parse() function will take the text within any selector by calling text()
 * or val() on them, turning the String into a Number, and returning these
 * values in a Number array.
 * It WILL BREAK the jQuery chain, and return an Array of Numbers.
 *
 * The syntax for the formatting is:
 * 0 = Digit
 * # = Digit, zero shows as absent
 * . = Decimal separator
 * - = Negative sign
 * , = Grouping Separator
 * % = Percent (multiplies the number by 100)
 * For example, a format of "#,###.00" and text of 4500.20 will
 * display as "4.500,20" with a locale of "de", and "4,500.20" with a locale of "us"
 *
 *
 * As of now, the only acceptable locales are 
 * United States -> "us"
 * Arab Emirates -> "ae"
 * Egypt -> "eg"
 * Israel -> "il"
 * Japan -> "jp"
 * South Korea -> "kr"
 * Thailand -> "th"
 * China -> "cn"
 * Hong Kong -> "hk"
 * Taiwan -> "tw"
 * Australia -> "au"
 * Canada -> "ca"
 * Great Britain -> "gb"
 * India -> "in"
 * Germany -> "de"
 * Vietnam -> "vn"
 * Spain -> "es"
 * Denmark -> "dk"
 * Austria -> "at"
 * Greece -> "gr"
 * Brazil -> "br"
 * Czech -> "cz"
 * France  -> "fr"
 * Finland -> "fi"
 * Russia -> "ru"
 * Sweden -> "se"
 * Switzerland -> "ch"
 * 
 * TODO
 * Separate positive and negative patterns separated by a ":" (e.g. use (#,###) for accounting)
 * More options may come in the future (currency)
 **/

(function(jQuery) {

function FormatData(dec, group, neg) {
	this.dec = dec;
	this.group = group;
	this.neg = neg;
};

function formatCodes(locale) {
	// default values
	var dec = ".";
	var group = ",";
	var neg = "-";

	if (locale == "us" ||
			locale == "ae" ||
			locale == "eg" ||
			locale == "il" ||
			locale == "jp" ||
			locale == "sk" ||
			locale == "th" ||
			locale == "cn" ||
			locale == "hk" ||
			locale == "tw" ||
			locale == "au" ||
			locale == "ca" ||
			locale == "gb" ||
			locale == "in"){
		dec = ".";
		group = ",";
	} else if (locale == "de" ||
					locale == "vn" ||
					locale == "es" ||
					locale == "dk" ||
					locale == "at" ||
					locale == "gr" ||
					locale == "br"){
		dec = ",";
		group = ".";
	} else if (locale == "cz" ||
					locale == "fr" ||
					locale == "fi" ||
					locale == "ru" ||
					locale == "se"){
		group = " ";
		dec = ",";
	} else if (locale == "ch"){
		group = "'";
		dec = ".";
	}

	return new FormatData(dec, group, neg);
};

jQuery.formatNumber = function(number, options) {
	var options = jQuery.extend({},jQuery.fn.parse.defaults, options);
	var formatData = formatCodes(options.locale.toLowerCase());

	var dec = formatData.dec;
	var group = formatData.group;
	var neg = formatData.neg;

	var numString = new String(number);
	numString = numString.replace(".",dec).replace("-",neg);
	return numString;
};

jQuery.fn.parse = function(options) {

	var options = jQuery.extend({},jQuery.fn.parse.defaults, options);

	var formatData = formatCodes(options.locale.toLowerCase());

	var dec = formatData.dec;
	var group = formatData.group;
	var neg = formatData.neg;

	var valid = "1234567890.-";

	var array = [];
	this.each(function(){

		var text = new String(jQuery(this).text());
		if (jQuery(this).is(":input"))
			text = new String(jQuery(this).val());

		// now we need to convert it into a number
		text = text.replace(group,'').replace(dec,".").replace(neg,"-");
		var validText = "";
		var hasPercent = false;
		if (text.charAt(text.length-1)=="%")
			hasPercent = true;
		for (var i=0; i<text.length; i++){
			if (valid.indexOf(text.charAt(i))>-1)
				validText = validText + text.charAt(i);
		}
		var number = new Number(validText);
		if (hasPercent){
			number = number / 100;
			number = number.toFixed(validText.length-1);
		}
		array.push(number);
	});

	return array;
};

jQuery.fn.format = function(options) {

	var options = jQuery.extend({},jQuery.fn.format.defaults, options);

	var formatData = formatCodes(options.locale.toLowerCase());

	var dec = formatData.dec;
	var group = formatData.group;
	var neg = formatData.neg;
	
	var validFormat = "0#-,.";

	return this.each(function(){
		var text = new String(jQuery(this).text());
		if (jQuery(this).is(":input"))
			text = new String(jQuery(this).val());

		// strip all the invalid characters at the beginning and the end
		// of the format, and we'll stick them back on at the end
		// make a special case for the negative sign "-" though, so 
		// we can have formats like -$23.32
		var prefix = "";
		var negativeInFront = false;
		for (var i=0; i<options.format.length; i++){
			if (validFormat.indexOf(options.format.charAt(i))==-1)
				prefix = prefix + options.format.charAt(i);
			else if (i==0 && options.format.charAt(i)=='-'){
				negativeInFront = true;
				continue;
			} else
				break;
		}
		var suffix = "";
		for (var i=options.format.length-1; i>=0; i--){
			if (validFormat.indexOf(options.format.charAt(i))==-1)
				suffix = options.format.charAt(i) + suffix;
			else
				break;
		}

		options.format = options.format.substring(prefix.length);
		options.format = options.format.substring(0, options.format.length - suffix.length);

		// now we need to convert it into a number
		var number = new Number(text.replace(group,'').replace(dec,".").replace(neg,"-"));

		// special case for percentages
		if (suffix == "%")
			number = number * 100;

		var returnString = "";

		var decimalValue = number % 1;
		if (options.format.indexOf(".") > -1){
			var decimalPortion = dec;
			var decimalFormat = options.format.substring(options.format.lastIndexOf(".")+1);
			var decimalString = new String(decimalValue.toFixed(decimalFormat.length));
			decimalString = decimalString.substring(decimalString.lastIndexOf(".")+1);
			for (var i=0; i<decimalFormat.length; i++){
				if (decimalFormat.charAt(i) == '#' && decimalString.charAt(i) != '0'){
					decimalPortion += decimalString.charAt(i);
					break;
				} else if (decimalFormat.charAt(i) == "0"){
					decimalPortion += decimalString.charAt(i);
				}
			}
			returnString += decimalPortion
		} else
			number = Math.round(number);

		var ones = Math.floor(number);
		if (number < 0)
			ones = Math.ceil(number);

		var onePortion = "";
		if (ones == 0){
			onePortion = "0";
		} else {
			// find how many digits are in the group
			var onesFormat = "";
			if (options.format.indexOf(".") == -1)
				onesFormat = options.format;
			else
				onesFormat = options.format.substring(0, options.format.indexOf("."));
			var oneText = new String(ones);
			var groupLength = 9999;
			if (onesFormat.lastIndexOf(",") != -1)
				groupLength = onesFormat.length - onesFormat.lastIndexOf(",")-1;
			var groupCount = 0;
			for (var i=oneText.length-1; i>-1; i--){
				onePortion = oneText.charAt(i) + onePortion;

				groupCount++;

				if (groupCount == groupLength && i!=0){
					onePortion = group + onePortion;
					groupCount = 0;
				}
			}
		}

		returnString = onePortion + returnString;

		// handle special case where negative is in front of the invalid
		// characters
		if (number < 0 && negativeInFront && prefix.length > 0){
			returnString = returnString.substring(1);
			prefix = neg + prefix;
		}

		returnString = prefix + returnString + suffix;

		if (jQuery(this).is(":input"))
			jQuery(this).val(returnString);
		else
			jQuery(this).text(returnString);
	});
};

jQuery.fn.parse.defaults = {
	locale: "us"
};

jQuery.fn.format.defaults = {
	format: "#,###.00",
	locale: "us"
};


})(jQuery);