/**
 * password_strength_plugin.js
 * Copyright (c) 2009 myPocket technologies (www.mypocket-technologies.com)
 
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.

 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.

 * View the GNU General Public License <http://www.gnu.org/licenses/>.

 * @author Darren Mason (djmason9@gmail.com)
 * @date 3/13/2009
 * @projectDescription Password Strength Meter is a jQuery plug-in provide you smart algorithm to detect a password strength. Based on Firas Kassem orginal plugin - http://phiras.wordpress.com/2007/04/08/password-strength-meter-a-jquery-plugin/
 * @version 1.0.1
 * 
 * @requires jquery.js (tested with 1.3.2)
 * @param shortPass:	"shortPass",	//optional
 * @param badPass:		"badPass",		//optional
 * @param goodPass:		"goodPass",		//optional
 * @param strongPass:	"strongPass",	//optional
 * @param baseStyle:	"testresult",	//optional
 * @param userid:		"",				//required override
 * @param messageloc:	1				//before == 0 or after == 1
 * 
*/

(function($) {
    $.fn.shortPass = 'Too short';
    $.fn.badPass = 'Weak';
    $.fn.goodPass = 'Good';
    $.fn.strongPass = 'Strong';
    $.fn.samePassword = 'Username and Password identical.';
    $.fn.resultStyle = "";

    $.fn.passStrength = function(options) {

        var defaults = {
            shortPass: "shortPass", //optional
            badPass: "badPass", 	//optional
            goodPass: "goodPass", 	//optional
            strongPass: "strongPass", //optional
            baseStyle: "testresult", //optional
            userid: "", 			//required override
            messageloc: 1, 			//before == 0 or after == 1
            ShortMsg: "Too Short",
            BadMsg: "Weak",
            GoodMsg: "Good",
            StrongMsg: "Strong",
            SamePass: "Username and Password identical."
        };
        var opts = $.extend(defaults, options);
        //Custom changes Start
        $.fn.shortPass = opts.ShortMsg;
        $.fn.badPass = opts.BadMsg;
        $.fn.goodPass = opts.GoodMsg;
        $.fn.strongPass = opts.StrongMsg;
        $.fn.samePassword = opts.SamePass;
        //Custom Changes End
        return this.each(function() {
            var obj = $(this);

            $(obj).unbind().keyup(function() {

                var results = $.fn.teststrength($(this).val(), $(opts.userid).val(), opts);

                if (opts.messageloc === 1) {
                    $(this).next("." + opts.baseStyle).remove();
                    $(this).after("<span class=\"" + opts.baseStyle + "\"><span></span></span>");
                    $(this).next("." + opts.baseStyle).addClass($(this).resultStyle).find("span").text(results);
                }
                else {
                    $(this).prev("." + opts.baseStyle).remove();
                    $(this).before("<span class=\"" + opts.baseStyle + "\"><span></span></span>");
                    $(this).prev("." + opts.baseStyle).addClass($(this).resultStyle).find("span").text(results);
                }
            });

            //FUNCTIONS
            $.fn.teststrength = function(password, username, option) {
                var score = 0;

                //password < 4
                if (password.length < 4) { this.resultStyle = option.shortPass; return $(this).shortPass; }

                //password == user name
                //if (password.toLowerCase() == username.toLowerCase()) { this.resultStyle = option.badPass; return $(this).samePassword;}

                //password length
                score += password.length * 4;
                score += ($.fn.checkRepetition(1, password).length - password.length) * 1;
                score += ($.fn.checkRepetition(2, password).length - password.length) * 1;
                score += ($.fn.checkRepetition(3, password).length - password.length) * 1;
                score += ($.fn.checkRepetition(4, password).length - password.length) * 1;

                //password has 3 numbers
                if (password.match(/(.*[0-9].*[0-9].*[0-9])/)) { score += 5; }

                //password has 2 symbols
                if (password.match(/(.*[!,@,#,$,%,^,&,*,?,_,~].*[!,@,#,$,%,^,&,*,?,_,~])/)) { score += 5; }

                //password has Upper and Lower chars
                if (password.match(/([a-z].*[A-Z])|([A-Z].*[a-z])/)) { score += 10; }

                //password has number and chars
                if (password.match(/([a-zA-Z])/) && password.match(/([0-9])/)) { score += 15; }
                //
                //password has number and symbol
                if (password.match(/([!,@,#,$,%,^,&,*,?,_,~])/) && password.match(/([0-9])/)) { score += 15; }

                //password has char and symbol
                if (password.match(/([!,@,#,$,%,^,&,*,?,_,~])/) && password.match(/([a-zA-Z])/)) { score += 15; }

                //password is just a numbers or chars
                if (password.match(/^\w+$/) || password.match(/^\d+$/)) { score -= 10; }

                //verifying 0 < score < 100
                if (score < 0) { score = 0; }
                if (score > 100) { score = 100; }

                if (score < 34) { this.resultStyle = option.badPass; return $(this).badPass; }
                if (score < 68) { this.resultStyle = option.goodPass; return $(this).goodPass; }

                this.resultStyle = option.strongPass;
                return $(this).strongPass;

            };

        });
    };
})(jQuery); 


$.fn.checkRepetition = function(pLen,str) {
 	var res = "";
     for (var i=0; i<str.length ; i++ ) 
     {
         var repeated=true;
         
         for (var j=0;j < pLen && (j+i+pLen) < str.length;j++){
             repeated=repeated && (str.charAt(j+i)==str.charAt(j+i+pLen));
             }
         if (j<pLen){repeated=false;}
         if (repeated) {
             i+=pLen-1;
             repeated=false;
         }
         else {
             res+=str.charAt(i);
         }
     }
     return res;
	};