/**
* 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);