/** 
* password_strength_plugin.js 
* Copyright (c) 20010 myPocket technologies (www.mypocket-technologies.com) 


* 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. 
* 
* @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 
        };
        var opts = $.extend(defaults, options);

        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;
};