Event.observe(window, 'load', init);

function init() {
	// Debugging turned on
	//$('debug').style.display = 'block';
	
	// Handle each preview link
	var links = document.getElementsByClassName('announcement');
	links.each(function(link) {
		Event.observe(link,'click',handlePreview);
	});
	
	
	// Handle the logout
	Event.observe('logout_href', 'click', handleLogout);
}

var global_sesskey = '';

function handlePreview(event)
{
	var a = $(Event.element(event));
	var element = a.up('.announcement');
	if(!element)
		element = a;
	
	if(element.down('.preview').style.display != 'none') {
		element.down('.preview').style.display = 'none';
		element.down('.description').style.display = 'block';
	} else {
		element.down('.preview').style.display = 'block';
		element.down('.description').style.display = 'none';
	}
}

function initiateCheckLogin()
{
	new Ajax.Request('/mhscluster/login/index.php', {
		onSuccess: checkLogin,
		onFailure: function(transport) {
			var notice = $('notice');
			new Insertion.Top(notice, 'Unable to connect to mhscluster. ');
		}
	});
}

function loginAsGuest() {
	new Ajax.Request( '/mhscluster/login/index.php', {
		method: 'post',
		parameters: 'username=guest&password=guest&testcookies=1',
		onSuccess: checkLogin
	})
}

function checkLogin(transport) {
	var notice = $('notice');
	if ((m = transport.responseText.match(/\<div class\=\"logininfo\"\>You are logged in as \<a  href\=\"http\:\/\/mhsclusterfamily\.aps\.edu\:16080\/user\/view\.php\?id\=([0-9]*)\&amp\;course\=([0-9]*)\"\>([^\<]*)\<\/a\> *\(\<a *href\=\"http\:\/\/mhsclusterfamily\.aps\.edu\:16080\/login\/logout\.php\?sesskey=([^\"]*)\"\>Logout\<\/a\>\)\<\/div\>/))) {
		var user_id = m[1];
		var course_id = m[2];
		var user = m[3];
		var sess_id = m[4];
		notice.update('Logged in as ' + user + '. (<a id=\'logout_href\' onclick=\'return false;\' href=\'/inc/ajax/login.php?logout=true\'>Logout</a>)').show();
		Event.observe('logout_href', 'click', handleLogout);

		// Keep our global session key
		global_sesskey = sess_id;
		
		// Store the login locally
		storeLogin('course_id='+course_id+'&user='+user+'&sess_id='+sess_id+'&login=true&user_id='+user_id);
		
	} else {

		if (transport.responseText.match(/\<div class\=\"logininfo\"\>You are currently using guest access/)) {
			// Store guest login locally
			storeLogin('guest_login=true');
		} else {
			storeLogout();
		}

		// Place login form
		notice.update('<form id="login_form" method="post" onsubmit="return false;">username:<input type="text" size=10 name="username" /> password:<input type="password" size=10 name="password" /><input type="hidden" name="testcookies" value="1" /><input type="submit" id="submit_login" value="Login" /></form>').show();
		Event.observe('login_form', 'submit', handleLogin);
	}
}

function handleLogin() {
	var notice = $('notice');
	var params = Form.serialize($("login_form"));
	params += "&login=true";
	
	notice.update('Checking login . . .');
	
	new Ajax.Request( '/mhscluster/login/index.php', {
		method: 'post',
		parameters: params,
		onSuccess: checkLogin
	})	
	return false;
}

function handleLogout() {
	var notice = $('notice');
	notice.update('Logging out . . .');

	// Not really logging out - just login as guest ;)
	loginAsGuest();
}

function totalLogout() {
	var notice = $('notice');
	notice.update('Logging out . . .');

	new Ajax.Request( '/mhscluster/login/index.php', {
		method: 'post',
		parameters: 'sesskey='+global_sesskey,
		onSuccess: checkLogin
	})
}

function storeLogin(params) {
	new Ajax.Request( '/inc/ajax/login.php', {
		method: 'post',
		parameters: params
	})	
}

function storeLogout() {
	storeLogin('logout=true');
}