// Password strength meter
// This jQuery plugin is written by firas kassem [2007.04.05]
// Firas Kassem  phiras.wordpress.com || phiras at gmail {dot} com
// for more information : http://phiras.wordpress.com/2007/04/08/password-strength-meter-a-jquery-plugin/
;

var shortPass = 'Too short';
var badPass = 'Bad';
var goodPass = 'Good';
var strongPass = 'Strong';



function passwordStrength(password,username)
{
    var score = 0;

    //password < 4
    if (password.length < 4 ) { return shortPass; }

    //password == username
    if (password.toLowerCase()==username.toLowerCase()) return badPass;

    //password length
    score += password.length * 4;
    score += ( checkRepetition(1,password).length - password.length ) * 1;
    score += ( checkRepetition(2,password).length - password.length ) * 1;
    score += ( checkRepetition(3,password).length - password.length ) * 1;
    score += ( 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 sybols
    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 nubers or chars
    if (password.match(/^\w+$/) || password.match(/^\d+$/) )  score -= 10;

    //verifing 0 < score < 100
    if ( score < 0 )  score = 0;
    if ( score > 100 )  score = 100;

    if (score < 34 )  return badPass;
    if (score < 68 )  return goodPass;
    return strongPass;
}


// checkRepetition(1,'aaaaaaabcbc')   = 'abcbc'
// checkRepetition(2,'aaaaaaabcbc')   = 'aabc'
// checkRepetition(2,'aaaaaaabcdbcd') = 'aabcd'

function checkRepetition(pLen,str) {
    var res = "";
    var repeated;
    for ( i=0; i<str.length ; i++ ) {
        repeated=true;
        for (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;
}