// Check password
function checkPassword(password)
{
    score = 0

    //password length
    score += password.length * 5
    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])/))  score += 5
    if (password.match(/(.*[0-9].*[0-9])/))  score += 5
    if (password.match(/(.*[0-9].*[0-9].*[0-9])/))  score += 5

    //password has 2 symbols
    if (password.match(/(.*[!,@,#,$,%,^,&,*,?,_,~])/)) score += 8
    if (password.match(/(.*[!,@,#,$,%,^,&,*,?,_,~].*[!,@,#,$,%,^,&,*,?,_,~])/)) score += 8

    //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

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

    return score;
}

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

function checkRepetition(pLen,str) {
    res = ""
    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
}
 
// Runs password through check and then updates GUI 
function runPassword(strPassword, strFieldID) 
{
	// Check password
	nRound = checkPassword(strPassword);
	
	 // Get controls
    	var ctlBar = document.getElementById(strFieldID + "_bar"); 
    	var ctlText = document.getElementById(strFieldID + "_text");
    	if (!ctlBar || !ctlText)
    		return;
    	
    	ctlBar.style.width = nRound + "%";
 
 	if (nRound > 75)
 	{
 		strText = "Very Secure";
 		strColor = "#2e9f07";
	}
 	else if (nRound > 60)
 	{
 		strText = "Secure";
 		strColor = "#3bce08";
	}
 	else if (nRound > 30)
 	{
 		strText = "Mediocre";
 		strColor = "#faa724";
 	}
 	else
 	{
 		strText = "Insecure";
 		strColor = "red";
 	}
	ctlBar.style.backgroundColor = strColor;
	ctlText.innerHTML = "<span style='color: " + strColor + ";'>" + strText + "</span>";
}
 
// Checks a string for a list of characters
function doesContain(strPassword, strCheck)
{
    	nCount = 0; 
 
	for (i = 0; i < strPassword.length; i++) 
	{
		if (strCheck.indexOf(strPassword.charAt(i)) > -1) 
		{ 
	        	nCount++; 
		} 
	} 
 
	return nCount; 
}