/**
 * 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 ($j) {
	$j.fn.shortPass = 'Te kort';
	$j.fn.badPass = 'Zwak';
	$j.fn.goodPass = 'Goed';
	$j.fn.strongPass = 'Sterk';
	$j.fn.samePassword = 'Gebruikersnaam en wachtwoord zijn identiek.';
	$j.fn.resultStyle = "";

	$j.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 = $j.extend(defaults, options);

		return this.each(function () {
			var obj = $j(this);

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

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

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

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

				//password < 4
				if (password.length < 5) { this.resultStyle = option.shortPass; return $j(this).shortPass; }

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

				//password length
				score += password.length * 4;
				score += ($j.fn.checkRepetition(1, password).length - password.length) * 1;
				score += ($j.fn.checkRepetition(2, password).length - password.length) * 1;
				score += ($j.fn.checkRepetition(3, password).length - password.length) * 1;
				score += ($j.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+$j/) || password.match(/^\d+$j/)) { score -= 10; }

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

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

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

			};

		});
	};
})(jQuery); 


$j.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;
	};