Constructor.
@param resourcesData
@param language
@param namespace
@constructor
function ResourcesAgent(resourcesData, language, namespace) {
	if (!resourcesData || (resourcesData && typeof resourcesData !== "object")) {
		throw new Error("Expected ResourceData.");
	}
	if (!language) {
		throw new Error("Expected argument language.");
	}
	if (!namespace) {
		throw new Error("Expected argument namespace.");
	}

	if (!resourcesData[language]) {
		throw new Error("Resource Language '" + language + "' is not available");
	}
	if (!resourcesData[language][namespace]) {
		throw new Error("Resource Namespace '" + namespace + "' is not available");
	}

	// returna a new instance of ResourcesAgent
	this.getResources = function createNewResourceAgent(language, namespace) {
		return new ResourcesAgent(resourcesData, language, namespace);
	};

	// extract this object to another more appropriate module file TODO
	// not the crafity-resources, but crafity.http. resources
	this.resourceParser = function resourceParser() {
		var SIX_MONTHS = (((((1000 * 60) * 60) * 24) * 30) * 6)
			;

		return function requestListener(req, res, next) {

			var languageFromUrl = (req.url.match(/^(?:\/language\/)(\w+)(?:\/{0,1})/i) || [])[1]
				, languageFromRequest = languageFromUrl || req.query.lang || req.cookies.lang || language
				, mustRedirect = languageFromUrl && true // test this TODO
				, resourceAgent = new ResourcesAgent(resourcesData, languageFromRequest, namespace)
				, url = req.query["return"] || req.headers.referer || "/"
				;

			// the leading language variable for now!
			req.language = languageFromRequest;
			req.resources = resourceAgent;

			res.local("resources", resourceAgent); // wat willen we hiermee
			res.local("languages", resourceAgent.getLanguages()); // wat willen we hiermee
			res.local("language", languageFromRequest);

			if (languageFromRequest) {
				res.cookie("lang", languageFromRequest, { path: "/", expires: new Date(Date.now() + SIX_MONTHS), httpOnly: true });
			} else {
				res.clearCookie('lang', { path: "/", expires: new Date(Date.now() + SIX_MONTHS) });
			}

			if (mustRedirect) {
				if (req.query.layout) {
					url += (url.indexOf("?") > -1 ? "&" : "?") + "layout=" + req.query.layout;
				}
				res.redirect(url);
			} else {
				next();
			}
		};
	};

	this.getLanguages = function getLanguages() {
		return Object.keys(resourcesData);
	};

	this.getLanguage = function getLanguage() {
		return language;
	};

	this.get = function get() {
		var result = resourcesData[language][namespace]
			, args = Array.prototype.slice.call(arguments);

		
		args.forEach(function (arg) {
			if (result) {
				result = result[arg];
			}
		});
		return result || args.join(".");
	};

}