/**
 * autoNumeric.js
 * @author: Bob Knothe
 * @version: 1.5.3.1
 *
 * Created by Robert J. Knothe on 2010-05-09. Please report any bug at http://www.decorplanit.com/plugin/
 *
 * Copyright (c) 2010 Robert J. Knothe  http://www.decorplanit.com/plugin/
 *
 * The MIT License (http://www.opensource.org/licenses/mit-license.php)
 *
 * Permission is hereby granted, free of charge, to any person
 * obtaining a copy of this software and associated documentation
 * files (the "Software"), to deal in the Software without
 * restriction, including without limitation the rights to use,
 * copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following
 * conditions:
 *
 * The above copyright notice and this permission notice shall be
 * included in all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
 * OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
 * HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
 * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
 * OTHER DEALINGS IN THE SOFTWARE.
 */
(function($) {
	$.fn.autoNumeric = function(options) {
		var opts = $.extend({}, $.fn.autoNumeric.defaults, options);// build main options before element iteration
		return this.each(function() {// iterate and reformat each matched element
			var iv = $(this); //check input value iv
			var ii = this.id; //input ID
			var io = $.metadata ? $.extend({}, opts, iv.metadata()) : opts;// build element specific options io = input options
			io.mDec = isNaN(io.mDec * 1) ? $('#' + io.mDec).val() * 1 : io.mDec * 1; // decimal places
			var kdCode = ''; //Key down Code
			var selectLength = 0; // length of input selected
			var caretPos = 0; //caret poistion
			var inLength = 0; //variable to length prior to keypress event
			var charLeft = 0; //number of characters to the left of the decimal point
			var numLeft = 0;
			var numRight = 0;
			var cmdKey = false;
			$(this).keydown(function(e){ //start keyDown
			cmdKey = false;
			io = $.metadata ? $.extend({}, opts, iv.metadata()) : opts;// build element specific options io = input options
			io.mDec = isNaN(io.mDec * 1) ? $('#' + io.mDec).val() * 1 : io.mDec * 1; // decimal places
				if (!e){ // routine for key and character codes on key down
					e = window.event;
				}
				if (e.keyCode){ // IE
					kdCode = e.keyCode;
				}
				else if (e.which){ // FF & O
					kdCode = e.which;
				}
				if(e.metaKey){ // tests for Mac coomand key being pressed down thanks Bart B. for bring to my attention
					cmdKey = true; // look on line 92
				}
				if (document.selection){ // IE Support to find the caret position
					this.focus();
					var select = document.selection.createRange();
					selectLength = document.selection.createRange().text.length;
					select.moveStart ('character', -this.value.length);
					caretPos = (select.text.length - selectLength) * 1;
				}
				else if (this.selectionStart || this.selectionStart == '0'){ // Firefox support  to find the caret position
					selectLength = this.selectionEnd * 1 - this.selectionStart * 1;
					caretPos = this.selectionStart * 1;
				} // end caret position
				inLength = this.value.length; //pass length to keypress event for value left & right of the decimal position & keyUp event to set caret position
			}).keypress(function(e){ //start keypress
				var allowed = io.aNum + io.aNeg + io.aDec; //allowed input
				charLeft = (this.value.lastIndexOf(io.aDec) == -1) ? inLength : inLength - (inLength - this.value.lastIndexOf(io.aDec)); //characters to the left of the decimal point
				numLeft = countNum(this.value, 0, charLeft); //the number of intergers to the left of the decimal point
				if (this.value.lastIndexOf(io.aDec) != -1){
					numRight = countNum(this.value, charLeft, inLength); // //the number of intergers to the right of the decimal point
				}
				var kpCode = ''; //Key Press Code
				if (e.keyCode){ // IE
					kpCode = e.keyCode;
				}
				else if (e.which){ // FF & O
					kpCode = e.which;
				}
				var cCode = String.fromCharCode(kpCode);	//Character code
				if ((e.ctrlKey || cmdKey) && (kdCode == 67 || kdCode == 86 || kdCode == 88)){ // allows controll key & copy(c=67), past (v=86), cut (v=88) 
					return;
				}
				if (kdCode == 8 || kdCode == 9 || kdCode == 13 || kdCode == 35 || kdCode == 36 || kdCode == 37 || kdCode == 39 || kdCode == 46){ // allows the backspace (8), tab (9), enter 13, end (35), home(36), left(37) and right(39) arrows key  delete key (46) to function in some browsers (FF & O) //Thanks to Bart Bons on the return key
					return;
				}
				if (allowed.indexOf(cCode) == -1){// checks for allowed characters
					e.preventDefault();
				}
				if (cCode == io.aDec){ // start rules when the decimal charactor key is pressed **********************************************************************************
					if (selectLength == inLength && selectLength > 0){ // allows the selected input to be replaced with a number - Thanks Bart V.
						return;
					}	
					if (this.value.lastIndexOf(io.aDec) > io.aSign.length && io.pSign == 'p' || io.mDec <= 0 || caretPos < this.value.length - io.mDec && io.pSign == 'p' || caretPos > this.value.indexOf('\u00A0') && io.pSign == 's' || caretPos === 0 && this.value.charAt(0) == '-' || this.value.lastIndexOf(io.aSep) >= caretPos && io.aSep !== '' || caretPos < (this.value.length - (io.aSign.length + 1 + io.mDec)) && io.pSign == 's'){ //prevents decimal point accurcy greater then the allowed 
						e.preventDefault();
					}
				}  // end rules when the decimal charactor key is pressed
				if (kpCode == 45 && (caretPos > 0 || this.value.indexOf('-') != -1 || io.aNeg === '')){// rules for negative key press ***********************
					if (selectLength == inLength){ // allows the selected input to be replaced with a number - Thanks Bart V. 
						return;
					}
					else{
						e.preventDefault();
					}
				}
				if (kpCode >= 48 && kpCode <= 57){ // start rules for number key press **********************************************************************************
					if (selectLength > 0){ // allows the selected input to be replaced with a number - Thanks Bart V.
						return;
					}	
					if (caretPos <= this.value.indexOf('\u00A0') && io.pSign == 'p'){ // prevents numbers to be enter in the currency sign on the left
						e.preventDefault();
					}
					if (this.value.indexOf('\u00A0') != -1 && caretPos > this.value.indexOf('\u00A0') && io.pSign == 's'){ // prevents numbers to be enter in the currency sign on the righ
						e.preventDefault();
					}
					if (this.value.indexOf('-') != -1 && caretPos === 0){ // prevents numbers from being entered to the left negative sign
						e.preventDefault();
					}
					if (numLeft >= io.mNum && caretPos <= charLeft){ //checks for max numeric characters to the left of the decimal point
						e.preventDefault();
					}
					if (this.value.indexOf(io.aDec) != -1 && caretPos >= charLeft + 1 && numRight >= io.mDec){ //checks for max numeric characters to the left and right of the decimal point
						e.preventDefault();
					}					
				} // end rules for number key press
			}).keyup(function(e){ //start keyup
				if (io.aSep === '' || e.keyCode == 9 || e.keyCode == 20 || e.keyCode == 35 || e.keyCode == 36 || e.keyCode == 37 || e.keyCode == 39 || kdCode == 9 || kdCode == 13 || kdCode == 20 || kdCode == 35 || kdCode == 36 || kdCode == 37 || kdCode == 39){// allows the tab(9), end(35), home(36) left(37) & right(39) arrows and when there is no thousand separator to bypass the autoGroup function 
					return; //kuCode 35 & 36 Home and end keys fix thanks to JPM USA 
				}
				// if(kdCode == 110 && this.value.indexOf(io.aDec) == -1 && io.mDec > 0 && caretPos >= this.value.length - io.mDec && this.value.lastIndexOf(io.aSep) < caretPos && this.value.lastIndexOf('-') < caretPos){ // start modification for period key to enter a comma on numeric pad
					// $(this).val(this.value.substring(0, caretPos) + io.aDec + this.value.substring(inLength, caretPos));
				// } // end mod
				$(fixId(ii)).val(autoGroup(this.value, io)); // adds the thousand sepparator
				var outLength = this.value.length;	
				charLeft = (this.value.lastIndexOf(io.aDec) == -1) ? outLength : outLength - (outLength - this.value.lastIndexOf(io.aDec));
				numLeft = countNum(this.value, 0, charLeft); //the number of intergers to the left of the decimal point
				if (numLeft > io.mNum){
					$(fixId(ii)).val(''); // if max number of characters are exceeeded
				}	
				var setCaret = 0; // start - determines the new caret position 
				if (inLength < outLength){
					setCaret = caretPos + (outLength - inLength);
				}
				if (inLength > outLength){
					if(selectLength > 0){
						setCaret = (outLength - (inLength - (caretPos + selectLength)));
					}
					else if((inLength - 2) == outLength){
						if(kdCode == 8){
							setCaret = (caretPos - 2);
						}
						else if(kdCode == 46 && caretPos == io.aSign.length + 1 && io.aSign != ''){
							setCaret = caretPos;
						}
						else{
							setCaret = (caretPos - 1);
						}	
					}
					else{
						if(kdCode == 8){
							setCaret = (caretPos - 1);
						}
						else{
							setCaret = caretPos;
						}	
					}
				} 
				if (inLength == outLength){
					if(this.value.charAt(caretPos - 1) == io.aSep && kdCode == 8){
						setCaret = (caretPos - 1);
					}
					else if(this.value.charAt(caretPos) == io.aSep && kdCode == 46){
						setCaret = (caretPos + 1);
					}
					else if(outLength === 1){
						setCaret = (caretPos + 1);
					}
					else {
						setCaret = caretPos;
					}	
				}
				if (io.aSign != '' && io.pSign == 'p' && caretPos <= io.aSign.length && selectLength != inLength){
					setCaret = io.aSign.length + 1;
				}
				if (selectLength == inLength && io.pSign == 's' && selectLength != inLength){
					setCaret = outLength - io.aSign.length - 1;
				}
				if (inLength === 0 && io.pSign == 's'){
					setCaret = outLength - io.aSign.length - 1;
				}
				if (outLength === 0 && io.aSign.length && io.pSign == 's'){
					setCaret = outLength - io.aSign.length - 1;
				}
				if (io.aSign != '' && io.pSign == 's' && caretPos >= outLength - io.aSign.length && selectLength != inLength){
					setCaret = outLength - io.aSign.length - 1;
				}
				if (outLength == io.aSign.length + 2 && io.pSign == 's'){
					setCaret = 1;
				} // ends - determines the new caret position 
				var iField = this;  // start - set caret position
				iField.focus();
				if (document.selection) {
					var iRange = iField.createTextRange();
					iRange.collapse(true);
					iRange.moveStart("character", setCaret);
					iRange.moveEnd("character", 0);
					iRange.select();
				}
				else if (iField.selectionStart || iField.selectionStart == '0') {
					iField.selectionStart = setCaret;
					iField.selectionEnd = setCaret;
				} // end - set caret position
			}).change(function(){ //start change - thanks to Javier P. corrected the inline onChange event
				if ($(fixId(ii)).val() != ''){
					autoCheck(iv, ii, io);
				}	
			}).bind('paste', function(){setTimeout(function(){autoCheck(iv, ii, io);}, 0); }); // thanks to Josh of Digitalbush.com
		});
	};
	function fixId(myid) { //thanks to Anthony & Evan C
		myid = myid.replace(/\[/g, "\\[").replace(/\]/g, "\\]"); 
		return '#' + myid.replace(/(:|\.)/g,'\\$1');
	}
	function countNum(str, start, end){ // private function to count the numeric characters to the left and right of the decimal point
		var chr = '';
		var numCount = 0; 
		for (j = start; j < end; j++){
			chr = str.charAt(j);
			if (chr >= '0' && chr <= '9'){
				numCount++;
			}
		}
		return numCount;
	}
	function autoGroup(iv, io){ // private function that places the thousand separtor
		if (io.aSep != ''){
			var digitalGroup = '';
			if (io.dGroup == 2){
				digitalGroup = /(\d)((\d)(\d{2}?)+)$/;
			}
			else if (io.dGroup == 4){
				digitalGroup = /(\d)((\d{4}?)+)$/;
			}
			else {
				digitalGroup = /(\d)((\d{3}?)+)$/;
			}
			for (k = 0; k < io.aSign.length; k++){ //clears the currency or other symbols and space
				iv = iv.replace(io.aSign.charAt(k), '').replace("\u00A0",'');
			}
			iv = iv.split(io.aSep).join(''); //removes the thousand sepparator
			var ivSplit = iv.split(io.aDec); // splits the string at the decimal string
			var s = ivSplit[0]; // assigns the whole number to the a varibale (s)
			while(digitalGroup.test(s)){ 
				s = s.replace(digitalGroup, '$1'+io.aSep+'$2'); //re-inserts the thousand sepparator via a regualer expression
			}
			if (io.mDec !== 0 && ivSplit.length > 1){ 
				iv = s + io.aDec + ivSplit[1]; //joins the whole number with the deciaml value
			}
			else {
				iv = s; // if whole numers only
			}
			if (iv.indexOf('-') != -1 && io.aSign != '' && io.pSign == 'p'){ // places the currency sign to the left (prefix)
				iv = iv.replace('-', '');
				return '-' + io.aSign + '\u00A0' + iv;
			}
			else if (iv.indexOf('-') == -1  && io.aSign != '' && io.pSign == 'p'){
				return io.aSign + '\u00A0' + iv;
			}
			if (iv.indexOf('-') != -1 && io.aSign != '' && io.pSign == 's'){  // places the currency sign to the right (suffix)
				iv = iv.replace('-', '');
			return '-'+ iv + '\u00A0' + io.aSign;
			}
			else if (iv.indexOf('-') == -1  && io.aSign != '' && io.pSign == 's'){
				return iv + '\u00A0' + io.aSign;
			}
			else {
				return iv;
			}
		}
		else {
			return iv;
		}
	}
	function autoRound(iv, mDec, mRound){ // private fumction for round the number - please note this handled as text - Javascript math function can return inaccurate values
		iv += ''; //to string
		var ivRounded = '';
		var i = 0;
		var nSign = ''; 
		if (iv.charAt(0) == '-'){ //Checks if the iv (input Value)is a negative value
			nSign = (iv * 1 === 0) ? '' : '-'; //determines if the value is zero - if zero no negative sign
			iv = iv.replace('-', ''); // removes the negative sign will be added back later if required			
		}
		if ((iv * 1) > 0){
			while (iv.substr(0,1) == '0' && iv.length > 1) { 
				iv = iv.substr(1,9999); 
			}
		}
		var dPos = iv.lastIndexOf('.'); //decimal postion as an integer
		if (dPos === 0){// prefix with a zero if the decimal point is the first character
			iv = '0' + iv;
			dPos = 1;
		}
		if (dPos == -1 || dPos == iv.length - 1){//Has an integer been passed in?
			if (mDec > 0){
				ivRounded = (dPos == -1) ? iv + '.' : iv;
				for(i = 0; i < mDec; i++){ //pads with zero
						ivRounded += '0';
				}
				return nSign + ivRounded;
			}
			else {
				return nSign + iv;
			}
		}
		var cDec = (iv.length - 1) - dPos;//checks decimal places to determine if rounding is required
		if (cDec == mDec){
			return nSign + iv; //If true return value no rounding required
		}
		if (cDec < mDec){ //Do we already have less than the number of decimal places we want?
			ivRounded = iv; //If so, pad out with zeros
			for(i = cDec; i < mDec; i++){
				ivRounded += '0';
			}
			return nSign + ivRounded;
		}
		var rLength = dPos + mDec; //rounded length of the string after rounding 
		var tRound = iv.charAt(rLength + 1) * 1; // test round
		var ivArray = [];// new array 
		for(i = 0; i <= rLength; i++){ //populate ivArray with each digit in rLength
			ivArray[i] = iv.charAt(i);
		}
		var odd = (iv.charAt(rLength) == '.') ? (iv.charAt(rLength - 1) % 2) : (iv.charAt(rLength) % 2);
		if ((tRound > 4 && mRound === 'S') || //Round half up symetric
			(tRound > 4 && mRound === 'A' && nSign === '') || //Round half up asymetric positive values
			(tRound > 5 && mRound === 'A' && nSign == '-') || //Round half up asymetric negative values
			(tRound > 5 && mRound === 's') || //Round half down symetric
			(tRound > 5 && mRound === 'a' && nSign === '') || //Round half down asymetric positive values
			(tRound > 4 && mRound === 'a' && nSign == '-') || //Round half down asymetric negative values
			(tRound > 5 && mRound === 'B') || //Round half even "Banker's Rounding"
			(tRound == 5 && mRound === 'B' && odd == 1) || //Round half even "Banker's Rounding"
			(tRound > 0 && mRound === 'C' && nSign === '') || //Round to ceiling toward positive infinite
			(tRound > 0 && mRound === 'F' && nSign == '-') || //Round to floor toward negative inifinte			
			(tRound > 0 && mRound === 'U')){ //round up away from zero 
			for(i = (ivArray.length - 1); i >= 0; i--){ //Round up the last digit if required, and continue until no more 9's are found
				if (ivArray[i] == '.'){
					continue;
				}
				ivArray[i]++;
				if (ivArray[i] < 10){ //if i does not equal 10 no more round up required
					break;
				}
			}
		}
		for (i=0; i <= rLength; i++){ //Reconstruct the string, converting any 10's to 0's
			if (ivArray[i] == '.' || ivArray[i] < 10 || i === 0){//routine to reconstruct non '10'
				ivRounded += ivArray[i];
			}
			else { // converts 10's to 0
				ivRounded += '0';
			}
		}
		if (mDec === 0){ //If there are no decimal places, we don't need a decimal point
			ivRounded = ivRounded.replace('.', '');
		}
		return nSign + ivRounded; //return rounded value
	} 
	function autoCheck(iv, ii, io){ // private function that blur event and pasted values for field compliance--
		iv = iv.val();
		if (iv.length > 25){ //maximum length of pasted value
			$(fixId(ii)).val('');
			return;
		}
		var eNeg = '';
		if (io.aNeg == '-'){ //escape the negative sign
			eNeg = '\\-';
		}
		var reg = new RegExp('[^'+eNeg+io.aNum+io.aDec+']','gi'); // regular expreession constructor to delete any characters not allowed for the input field.
		var testPaste = iv.replace(reg,''); //deletes all characters that are not permeinted in this field
		if (testPaste.lastIndexOf('-') > 0 || testPaste.indexOf(io.aDec) != testPaste.lastIndexOf(io.aDec)){
			testPaste = '';
		} 
		var rePaste = '';
		var nNeg = 0;
		var nSign = '';
		var i = 0;
		var s = testPaste.split('');
		for (i=0; i<s.length; i++){ // for loop testing pasted value after non allowable characters have been deleted
			if (i === 0 && s[i] == '-'){ // allows negative symbol to be added if it is the first character
				nNeg = 1;
				nSign = '-';
				continue;
			}
			if (s[i] == io.aDec && s.length -1 == i){ //if the last charter is a decimal point it is dropped
				break;
			}
			if (rePaste.length === 0 && s[i] == '0' && (s[i+1] >= 0 || s[i+1] <= 9)){//controls leading zero
				continue;
			}
			else {
				rePaste = rePaste + s[i];
			}
		}
		rePaste = nSign + rePaste;
		if (rePaste.indexOf(io.aDec) == -1 && rePaste.length > (io.mNum + nNeg)){  // check to see if the maximum & minimum values have been exceeded when no decimal point is present
			rePaste = '';
		}
		if (rePaste.indexOf(io.aDec) > (io.mNum + nNeg)){  // check to see if the maximum & minimum values have been exceeded when the decimal point is present
			rePaste = '';
		}
		if (rePaste.indexOf(io.aDec) != -1 && (io.aDec != '.')){
			rePaste = rePaste.replace(io.aDec, '.');
		}	
		rePaste = autoRound(rePaste, io.mDec, io.mRound);
		if (io.aDec != '.'){
			rePaste = rePaste.replace('.', io.aDec);
		}
		if (rePaste !== '' && io.aSep !== ''){
			rePaste = autoGroup(rePaste, io);
		}
		$(fixId(ii)).val(rePaste);
		return false;
	}
	$.fn.autoNumeric.Strip = function(ii, options){ // public function that stripes the format and converts decimal seperator to a period
		var opts = $.extend({}, $.fn.autoNumeric.defaults, options);
		var io = $.metadata ? $.extend({}, opts, $(fixId(ii)).metadata()) : opts;
		io.mDec = isNaN(io.mDec * 1) ? $('#' + io.mDec).val() * 1 : io.mDec * 1; // decimal places
		var iv = $(fixId(ii)).val();
		iv = iv.replace(io.aSign, '').replace('\u00A0','');
		var reg = new RegExp('[^'+'\\-'+io.aNum+io.aDec+']','gi'); // regular expreession constructor
		iv = iv.replace(reg,''); //deletes all characters that are not permitted in this field
		var nSign = ''; 
		if (iv.charAt(0) == '-'){ //Checks if the iv (input Value)is a negative value
			nSign = (iv * 1 === 0) ? '' : '-'; //determines if the value is zero - if zero no negative sign
			iv = iv.replace('-', ''); // removes the negative sign will be added back later if required			
		}
		iv = iv.replace(io.aDec, '.');
		if (iv * 1 > 0){
			while (iv.substr(0,1) == '0' && iv.length > 1) { 
				iv = iv.substr(1,9999); 
			}
		}
		iv = (iv.lastIndexOf('.') === 0) ? ('0' + iv) : iv;
		iv = (iv * 1 === 0) ? '0' : iv;
		return nSign + iv;
	};
	$.fn.autoNumeric.Format = function(ii, iv, options){ //  public function that recieves a numeric string and formats to the target input field
		iv += ''; //to string
		var opts = $.extend({}, $.fn.autoNumeric.defaults, options);
		var io = $.metadata ? $.extend({}, opts, $(fixId(ii)).metadata()) : opts;
		io.mDec = isNaN(io.mDec * 1) ? $('#' + io.mDec).val() * 1 : io.mDec * 1; // decimal places
		iv = autoRound(iv, io.mDec, io.mRound);
		var nNeg = 0;
		if (iv.indexOf('-') != -1 && io.aNeg === ''){ //deletes negative value
			iv = '';
		}
		else if (iv.indexOf('-') != -1 && io.aNeg == '-'){
			nNeg = 1;
		}
		if (iv.indexOf('.') == -1 && iv.length > (io.mNum + nNeg)){  // check to see if the maximum & minimum values have been exceeded when no decimal point is present
			iv = '';
		}
		else if (iv.indexOf('.') > (io.mNum + nNeg)){ // check to see if the maximum & minimum values have been exceeded when a decimal point is present
			iv = '';
		}
		if (io.aDec != '.'){ //replaces the decimal point with the new sepatator
			iv = iv.replace('.', io.aDec);
		}
		return autoGroup(iv, io);
	};
	$.fn.autoNumeric.defaults = {// plugin defaults
		aNum: '0123456789', //allowed  numeric values
		aNeg: '', // allowed negative sign / character
		aSep: ',', // allowed thousand separator character
		aDec: '.', // allowed decimal separator character
		aSign: '', // allowed currency symbol
		pSign: 'p', // placement of currency sign prefix or suffix
		mNum: 9, // max number of numerical characters to the left of the decimal
		mDec: 2, // max number of decimal places
		dGroup: 3, // digital grouping for the thousand separator used in Format
		mRound: 'S' //  method used for rounding
	};
})(jQuery);