// Generate a random number of numOfBits bits
function generateRandomNumber(numOfBits){
	// Get up limit for generated random number
	var upLimit = 0;
	for(var i=0; i<numOfBits; i++){
		upLimit += Math.pow(2, i);
		//console.log("up limit = " + upLimit);
	}

	return Math.floor(Math.random() * upLimit);
}

// Generate binary string from number
function generateBinaryString(number){
	return number.toString(2);
}

// Generate GUID
function generateGUID(){
	// Variant and version
	var variant = "101";
	var version = "0100";  // RFC 4122 Version 4 of GUID creation

	// Timestamp
	var timestamp_number = generateRandomNumber(60);
	var timestamp_binary_str = generateBinaryString(timestamp_number);
	console.log("timestamp: " + timestamp_binary_str);

	// Clock sequence
	var clock_seq_number  = generateRandomNumber(14);
	var clock_seq_binary_str = generateBinaryString(clock_seq_number);
	console.log("clock sequence: " + clock_seq_binary_str);

	// Node
	var node_number = generateRandomNumber(48);
	var node_binary_str = generateBinaryString(node_number);
	console.log("node: " + node_binary_str);

	// GUID components
	var time_low = timestamp_binary_str.substring(48, 63+1);
	console.log("time_low: " + time_low);
	var time_mid = timestamp_binary_str.substring(32, 47+1);
	console.log("time_mid: " + time_mid);
	var time_hi_and_version = timestamp_binary_str.substring(0, 31+1);
	console.log("time_hi_and_version: " + time_hi_and_version);

	var clock_seq_hi_and_reserved = generateBinaryString(parseInt(clock_seq_binary_str.substring(0, 7+1), 2) * parseInt(variant, 2));
	clock_seq_hi_and_reserved = "01" + clock_seq_hi_and_reserved.substring(2, 7+1);
	console.log("clock_seq_hi_and_reserved: " + clock_seq_hi_and_reserved);
	var clock_seq_low = clock_seq_binary_str.substring(8, 15+1);
	console.log("clock_seq_low: " + clock_seq_low);

	var guid = time_low + time_mid + time_hi_and_version + clock_seq_hi_and_reserved + clock_seq_low + node_binary_str;
	console.log("Binary GUID: " + guid);

	return parseInt(guid, 2).toString(16);
}

// Store generated GUID in a cookie
function setGuidCookie(guid){
	document.cookie = "userid=" + guid + "; expires=Thu, 31 Dec 2513 12:00:00 GMT";
}

// Get GUID stored in a cookie
function getGuidCookie(){
	var cname = "userid=";
	var cookies = document.cookie.split(";");

	for(var i=0; i<cookies.length; i++){
		var c = cookies[i].trim();
		if(c.indexOf(cname) == 0){
			return c.substring(cname.length, c.length);
		}
	}

	return "";
}

// Check if there is a GUID stored on a cookie and gerenate and store if not
function getGUID(){
	// Check if there is a previous

	if(localStorage.userDID){

		return localStorage.userDID;

	}else{


		var guid = getGuidCookie();
		if(guid != ""){
			// It is not first time for this user
			//alert("Bienvenido de nuevo: " + guid);
			return guid;
		}
		else{
			// First time for this user
			// Generate a new GUID
			guid = generateGUID()+ "@bromapp_web";
			console.log("GUID generado: " + guid);
			// Store generated GUID in a coockie
			setGuidCookie(guid);
			return guid;
		}
	}

	//return localStorage.userDID;
}


function getCountry(){

	return localStorage.userCOU;

}