var dataforma = dataforma || {};

jQuery(function(){
    function Authentication(){
        var that = {};
        var jsonpCallback = "?jsonpCallback";

        var lookUpUrls = [
            "https://auth.dataforma.com/login.directory"
        ];

        var lookUpUrlIdx = 0;

        that.lookupServiceCode = function(serviceCode, callback, format){
            if(lookUpUrlIdx >= lookUpUrls.length){
                alert('Error connecting to the Dataforma login service.  Please contact if the problem persists');

                return;
            }

            var url = lookUpUrls[lookUpUrlIdx];

            if(!format) format = "json";
            if(!callback) callback = function(result){
                console.log("No callback defined...  Result dump: " + JSON.stringify(result));
            }
            if(format == "jsonp") {
                url += jsonpCallback + "=?";
            }

            var options = {
                url: url,
                data: {
                    format: format,
                    servicecode: serviceCode
                },
                timeout: 3000, /* handle 404 and 500 errors */
                dataType: "json",
                success: callback,
                error: function(){
                    lookUpUrlIdx++;

                    that.lookupServiceCode(serviceCode, callback, format);
                }
            };

            if(format == "jsonp") {
                options.jsonp = jsonpCallback;
            }

            jQuery.ajax(options);
        }

        return that;
    }

    dataforma.authentication = dataforma.authentication || Authentication();
});