globalSsoByJsRequesterData = [];

(function () {
	var jsonpRequestCounter = 0;
	var jsonpRequests = {};
	var lwJsonpRequester_script_node = function(url, text)
	{
		var scriptTag = document.createElement('script');
		var scriptText = document.createTextNode(text);
		var debug = '';
		if (url)
			debug += 'url='+url+': ';
		debug += text;
		scriptTag.setAttribute('type', 'text/javascript');
		if (url)
			scriptTag.setAttribute('src', url);
		if (text)
			scriptTag.appendChild(scriptText);
		document.body.appendChild(scriptTag);
	};
	var lwJsonpRequester = function (url, callback)
	{
		var callbackName = 'ssobyjsjsonp_request_'+jsonpRequestCounter;
		var callbackText = 'function '+callbackName+'(object) { globalSsoByJsRequesterData['+jsonpRequestCounter+'](object); globalSsoByJsRequesterData['+jsonpRequestCounter+'] = false; }';
		globalSsoByJsRequesterData[jsonpRequestCounter] = callback;

		jsonpRequestCounter++;

		var delimiter = '?';
		if (url.indexOf('?') >= 0)
			delimiter = '&';
		url = url + delimiter + 'jsonp='+encodeURIComponent(callbackName);
		lwJsonpRequester_script_node(false, callbackText);
		lwJsonpRequester_script_node(url, '');
	};
	var slashifyBaseUri = function(baseUri)
	{
		if (baseUri.charAt(baseUri.length - 1) != '/')
			return baseUri + '/';
		else
			return baseUri;
	};

	var baseUri = slashifyBaseUri("https:\/\/auth.ndla.no");

	var requestLoginXml = function (callback)
	{
		lwJsonpRequester(baseUri + 'seria/api/?apiPath=SAPI_SSOByJavascript/ssoCheck&apiReturn=jsonp', callback);
	};
	var trySso = function ()
	{
		requestLoginXml(function (data) {
								if (data.loggedIn) {
						jQuery.ajax(
							{
								'url': '/seriaauth/ssoidentity',
								'async': true,
								'data': {
									'roamauthurl': data.userXml,
									'userChange': data.userChange
								},
								'type': 'POST',
								'dataType': 'text',
								'success': function (data, textStatus, jqXHR) {
									if (typeof JSON === 'object' && typeof JSON.parse === 'function')
										data = JSON.parse(data);
									else
										eval('data = '+data+';');
									if (data.reload)
										location.reload(true);
								}
							}
						);
					} else {
						jQuery.ajax(
							{
								'url': '/seriaauth/ssoidentity',
								'async': true,
								'data': {
									'roamauthurl': '',
									'userChange': data.userChange
								},
								'type': 'POST',
								'dataType': 'text',
								'success': function (data, textStatus, jqXHR) {
									if (typeof JSON === 'object' && typeof JSON.parse === 'function')
										data = JSON.parse(data);
									else
										eval('data = '+data+';');
									if (data.reload)
										location.reload(true);
								}
							}
						);
					}
						});
	};

	if (window.addEventListener)
		window.addEventListener('load', trySso, false);
	else if (window.attachEvent)
		window.attachEvent('onload', trySso);
	else
		trySso();
})();