/**
 * 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;
};



