//  This file is part of the jQuery formatPercent Plugin.
//

(function($) {

    $.formatPercent = {};

    $.formatPercent.regions = [];

    // default Region is en
    $.formatPercent.regions[''] = {
        symbol: '%',
        positiveFormat: '%n%s',
        negativeFormat: '-%n%s',
        decimalSymbol: '.',
        digitGroupSymbol: ',',
        groupDigits: true
    };

    $.fn.formatPercent = function(destination, settings) {
				
				if (arguments.length == 1 && typeof destination !== "string") {
					settings = destination;
					destination = false;
				}

        // initialize defaults
        var defaults = {
            name: "formatPercent",
            //useHtml: false,
            //useHtmlOnDestination: false,
            colorize: false,
            region: '',
            global: true,
	    showDecimals: true
        };
        // initialize default region
        defaults = $.extend(defaults, $.formatPercent.regions['']);
        // override defaults with settings passed in
        settings = $.extend(defaults, settings);
        
        // check for region setting
        if (settings.region.length > 0)
        {
        	settings = $.extend(settings, getRegionOrCulture(settings.region));
        }

        return this.each(function() {
            $this = $(this);

						// get number
            var num = '0';
            num = $this[$this.is('input, select, textarea') ? 'val' : 'html']();
						
						// clean number
            var trimRegex = new RegExp("[^\\d" + settings.decimalSymbol + "-]", "g");
            num = num.replace(trimRegex, '');
						if (settings.decimalSymbol != '.')
							num = num.replace(settings.decimalSymbol, '.');  // reset to US decimal for arthmetic
            if (isNaN(num)) num = '0';

						// format number
            var isPositive = (num == (num = Math.abs(num)));
            // removed to always round down 
            // num = Math.floor(num * 100 + 0.50000000001)
            num = Math.floor(num * 100);
            var decimals = num % 100;
            num = Math.floor(num / 100).toString();

            if (decimals < 10) decimals = '0' + decimals;

            if (settings.groupDigits) {
                for (var i = 0; i < Math.floor((num.length - (1 + i)) / 3); i++) {
                    num = num.substring(0, num.length - (4 * i + 3)) + settings.digitGroupSymbol + num.substring(num.length - (4 * i + 3));
                }
            }
		
            if (settings.showDecimals) {
                num = num + settings.decimalSymbol + decimals;
            }

						// format symbol/negative
            var format = isPositive ? settings.positiveFormat : settings.negativeFormat;
            var percent = format.replace(/%s/g, settings.symbol)
            percent = percent.replace(/%n/g, num);

						// setup destination
						if (!destination)
						{
							//settings.useHtmlOnDestination = settings.useHtml;
							destination = $this;
						}
						else
						{
							destination = $(destination);
						}
						// set destination
            //destination[settings.useHtmlOnDestination ? 'html' : 'val'](percent);
            destination[destination.is('input, select, textarea') ? 'val' : 'html'](percent);
            
            // colorize
            if (settings.colorize)
            	destination.css('color', isPositive ? '' : 'red');
        });
    };

    // Remove all non numbers from text
    $.fn.toNumber = function(settings) {
        var defaults = $.extend({
            name: "toNumber",
            region: '',
            global: true
        }, $.formatPercent.regions['']);
        
        settings = jQuery.extend(defaults, settings);
        if (settings.region.length > 0)
        {
        	settings = $.extend(settings, getRegionOrCulture(settings.region));
        }

        return this.each(function() {
            var method = $(this).is('input, select, textarea') ? 'val' : 'html';
            var trimRegex = new RegExp("[^\\d" + settings.decimalSymbol + "-]", "g");
            $(this)[method]($(this)[method]().replace(trimRegex, ''));
        });
    };

    // returns the value from the first element as a number
    $.fn.asNumber = function(settings) {
        var defaults = $.extend({
            name: "asNumber",
            region: '',
            parse: true,
            parseType: 'Float',
            global: true
        }, $.formatPercent.regions['']);
        settings = jQuery.extend(defaults, settings);
				if (settings.region.length > 0)
        {
        	settings = $.extend(settings, getRegionOrCulture(settings.region));
        }

				settings.parseType = validateParseType(settings.parseType);

        var method = $(this).is('input, select, textarea') ? 'val' : 'html';
	var negative = false;

        if ($(this)[method]().charAt(0) == '(') {
           negative = true;
	}
        var trimRegex = new RegExp("[^\\d" + settings.decimalSymbol + "-]", "g");
        var num = $(this)[method]().replace(trimRegex, '');
        
        if (negative)
          num = -num;
        if (!settings.parse)
            return num;

				if (num.length == 0)
					num = '0';
					
				if (settings.decimalSymbol != '.')
						num = num.replace(settings.decimalSymbol, '.');  // reset to US decimal for arthmetic
						
        return window['parse' + settings.parseType](num);
    };

		function getRegionOrCulture(region) {
			var regionInfo = $.formatPercent.regions[region];
			if (regionInfo) {
				return regionInfo;
			}
			else {
				if (/(\w+)-(\w+)/g.test(region))
				{
					var culture = region.replace(/(\w+)-(\w+)/g, "$1");
					return $.formatPercent.regions[culture];
				}
			}
			// fallback to extend(null) (i.e. nothing)
			return null;
		}

		function validateParseType(parseType) {
			switch(parseType.toLowerCase())
			{
				case 'int':
					return 'Int';
				case 'float':
					return 'Float';
				default:	
					throw 'invalid parseType';
			}
		}

})(jQuery);