/**********************************************************
* Authenticate
***********************************************************/
function Authenticate(email, passwd)
{
	// if we do not use v21 goto v22 authentication
	if (!use_v21_server) {
		ajaxAuthenticate(email,passwd);
		return;
	}
	
	// check the user and find what version he uses 2.1 or 2.2
	// first check the user in v2.1
	var params = "email=" + email;

	$.ajax({
		url: 'core/v21/check_email_available_v21.php',
		type: 'POST',
		dataType: 'xml',
		data: params,
		error: function(){
			alert		('Error in check user ');
		},
		success: function(xml) {

			var status 	= getXmlTag(xml, "status");
			var message = getXmlTag(xml, "message");
			
			if (status == interface_ok)
			{
				// the user exists in 2.1 so authenticate him with v21
				ajaxAuthenticate_v21(email,passwd);
			}
			else if (status == interface_user_does_not_exist_error_v21)
			{
				// the user is not in v21 so authenticate him with v22
				ajaxAuthenticate(email,passwd);
			}
			else
			{	
				alert("Error occured: " + message);
			} // status != interface_ok	
		}
	});		

}

/*****************************
* Proceed authentication
*******************************/
function ajaxAuthenticate(email, passwd)
{
	
	// create client side cookies
	var session_key 					= GenerateRandomSessionKey	();
	CreateClientSecurePasswordCookie	(passwd, session_key);
	// convert to hex for correct value transfer
	var session_key_hex 				= stringToHex(session_key);

	var passwd_md5 						= md5(passwd);
	
	var params = "email=" + email + "&passwd_md5=" + passwd_md5 + "&session_key=" + session_key_hex;
	
	
	$.ajax({
		url: 'core/authenticate.php',
		type: 'POST',
		dataType: 'xml',
		data: params,
		error: function(){
			alert		('Error occured during authentication');
		},
		success: function(xml) {
			

			var status 	= getXmlTag(xml, "status");
			var message = getXmlTag(xml, "message");
			
			
			if (status == interface_ok)
			{
				var target_alias = getXmlTag(xml, "target_alias");
				if (target_alias != null) {
					window.location = "page.php?id=" + target_alias;
				} else {
					window.location = "page.php?id=member_home_page";
				}
			}
			else
			{	
				if(status == interface_network_error || status == interface_database_generic_error || status == interface_database_logical_error || status == interface_unknown_error)
				{
					window.location = 'page.php?id=down_server';
				}
				else
				{
					if(status == interface_user_temp_locked_error || status == interface_user_incorrect_password_temp_locked_error)
					{
						alert("Your account is frozen due to a possible security breach.\n\nPlease check your email for more detail.");   
					}
					else
						alert("You could not be authenticated. Reason:  " + message);
					
					if(status == interface_access_denied_password_error || status == interface_access_denied_error)
					{
						var prev_login = readCookie('prev_login');
						if(prev_login == '' || prev_login == null)
						{
							var login_attempt = 1;
							createCookie('login_attempt', 1, 0,04166);
							createCookie('prev_login', email,0);
						}
						else
						{
							if(prev_login != email)
							{
								var login_attempt = 1;
								createCookie('prev_login', email,0);
								createCookie('login_attempt', 1, 0,04166);
							}
							else
							{
								var login_attempt = readCookie('login_attempt');
								login_attempt = parseInt(login_attempt);
							}
						}

						if(login_attempt == null)
							createCookie('login_attempt', 1, 0,04166);
						else
						{
							if(login_attempt <= 2)
								createCookie('login_attempt', login_attempt+1, 0,04166);
							else
							{
								createCookie('login_attempt', login_attempt+1, 0,04166);
								// show captcha here
							}
						} // login_attempt == null
					}// You could not be authenticated
				} // interface_network_error
			} // status != interface_ok	
			
		}
	});		
}


/***************************************************
* Proceed auth in 2.1
****************************************************/
function ajaxAuthenticate_v21(email, passwd)
{
	// create client side cookies
	var session_key 					= GenerateRandomSessionKey	();
	CreateClientSecurePasswordCookie	(passwd, session_key);
	// convert to hex for correct value transfer
	var session_key_hex 				= stringToHex(session_key);

	var passwd_md5 						= md5(passwd);
	
	var params 	=	"email=" + email + 
					"&passwd_md5=" + passwd_md5 + 
					"&session_key=" + session_key_hex;
	
	$.ajax({
		url: 'core/v21/authenticate_v21.php',
		type: 'POST',
		dataType: 'xml',
		data: params,
		error: function(){
			alert		('Error occured during authentication');
		},
		success: function(xml) {
			
			var status 	= getXmlTag(xml, "status");
			var message = getXmlTag(xml, "message");
			
			if (status == interface_ok)
			{
				
				var target_alias = getXmlTag(xml, "target_alias");
				if (target_alias != null) {
					window.location = "page.php?id=" + target_alias;
				} else {
					window.location = "page.php?id=member_home_page";
				}
				
			}
			else
			{	
				if(status == interface_network_error || status == interface_database_generic_error || status == interface_database_logical_error || status == interface_unknown_error)
				{
					window.location = 'page.php?id=down_server';
				}
				else
				{				
					alert("You could not be authenticated. Reason:  " + message);
						
					if(status == interface_access_denied_password_error || status == interface_access_denied_error)
					{
						var prev_login = readCookie('prev_login');
						if(prev_login == '' || prev_login == null)
						{
							var login_attempt = 1;
							createCookie('login_attempt', 1, 0,04166);
							createCookie('prev_login', email,0);
						}
						else
						{
							if(prev_login != email)
							{
								var login_attempt = 1;
								createCookie('prev_login', email,0);
								createCookie('login_attempt', 1, 0,04166);
							}
							else
							{
								var login_attempt = readCookie('login_attempt');
								login_attempt = parseInt(login_attempt);
							}
						}

						if(login_attempt == null)
							createCookie('login_attempt', 1, 0,04166);
						else
						{
							if(login_attempt <= 2)
								createCookie('login_attempt', login_attempt+1, 0,04166);
							else
							{
								createCookie('login_attempt', login_attempt+1, 0,04166);
								// show captcha here
							}
						} // login_attempt == null
					}// You could not be authenticated
				} // interface_network_error
			} // status != interface_ok	
			
		}
	});		
	
}