var bCheckNumbers = true;
var bCheckUpperCase = true;
var bCheckLowerCase = true;
var bCheckPunctuation = true;
var nPasswordLifetime = 365;


// Check password
function checkPassword(strPassword) {
	// Reset combination count
	nCombinations = 0;
	
	
	// Check numbers
	if (bCheckNumbers){
		strCheck = "0123456789";
		if (doesContain(strPassword, strCheck) > 0) { 
			nCombinations += strCheck.length; 
		}
	}	
	// Check upper case
	if (bCheckUpperCase){
		strCheck = "ABCDEFGHIJKLMNOPQRSTUVWXYZ";
		if (doesContain(strPassword, strCheck) > 0) { 
			nCombinations += strCheck.length; 
		}
	}	
	// Check lower case
	if (bCheckLowerCase){
		strCheck = "abcdefghijklmnopqrstuvwxyz";
		if (doesContain(strPassword, strCheck) > 0) { 
			nCombinations += strCheck.length; 
		}
	}	
	// Check punctuation
	if (bCheckPunctuation){
		strCheck = ";:-_=+\|//?^&!.@$£#*()%~<>{}[]";
		if (doesContain(strPassword, strCheck) > 0) { 
			nCombinations += strCheck.length; 
		}
	}	
	// Calculate
	// -- 500 tries per second => minutes 
	var nDays = ((Math.pow(nCombinations, strPassword.length) / 500) / 2) / 86400;
 
	// Number of days out of password lifetime setting
	var nPerc = nDays / nPasswordLifetime;	
	return nPerc;
}


// Runs password through check and then updates GUI 
function runPass(strPassword, strFieldId){
	document.getElementById('checkPass').style.display = 'block';
	// Check password
	nPerc = checkPassword(strPassword);	
	// Get controls
	var ctlBar = document.getElementById(strFieldId+"_bar"); 
	var ctlText = document.getElementById(strFieldId+"_text");
	if (!ctlBar || !ctlText)
	return;   	
	// Set new width
	var nRound = Math.round(nPerc * 100);
	if (nRound < (strPassword.length * 5)) { 
		nRound += strPassword.length * 5; 
	}
	if (nRound > 100)
	nRound = 100;
	ctlBar.style.width = nRound + "%"; 
	// Color and text
	if (nRound > 95){
		strText = "Very Secure";
		strColor = "#3bce08";
	}
	else if (nRound > 75){
		strText = "Secure";
		strColor = "orange";
	}
	else if (nRound > 50){
		strText = "Mediocre";
		strColor = "#ffd801";
	}
	else{
		strColor = "red";
		strText = "Insecure";
	}
	ctlBar.style.backgroundColor = strColor;
	ctlText.innerHTML = "<span style='color: " + strColor + ";'>" + strText + "</span>";
	document.getElementById(strFieldId).style.borderColor = strColor;
} 


// 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; 
}