(function () {
    angular.module('app').factory('tenantService', ['config', '$http', '$q', tenantService]);

    function tenantService(config, $http, $q) {

        var service = {
            getUISettings: getUISettings,
            getOrgUISettings: getOrgUISettings,
            getTerminology: getTerminology,
            getOrgTerminology: getOrgTerminology
        };

        return service;

        function getUISettings(hostName) {
            var request = $http({
                method: "get",
                url: config.tenantUrl + 'uisettings/host/' + encodeURIComponent(hostName)
            });

            return (request.then(handleSuccess, handleError));
        }

        function getOrgUISettings(orgId) {
            var request = $http({
                method: "get",
                url: config.tenantUrl + 'uisettings',
                headers: {
                    ownerid: orgId.toUpperCase(),
                    tenantid: orgId.toUpperCase(),
                }
            });

            return (request.then(handleSuccess, handleError));
        }

        function getTerminology(hostName) {
            var request = $http({
                method: "get",
                url: config.tenantUrl + 'terminology/host/' + encodeURIComponent(hostName)
            });

            return (request.then(handleSuccess, handleError));
        }

        function getOrgTerminology(orgId) {
            var request = $http({
                method: "get",
                url: config.tenantUrl + 'terminology',
                headers: {
                    ownerid: orgId.toUpperCase(),
                    tenantid: orgId.toUpperCase(),
                }
            });

            return (request.then(handleSuccess, handleError));
        }

        // I transform the successful response, unwrapping the application data
        // from the API response payload.
        function handleSuccess(response) {
            return (response.data);
        }

        function handleError(response) {

            // The API response from the server should be returned in a
            // nomralized format. However, if the request was not handled by the
            // server (or what not handles properly - ex. server error), then we
            // may have to normalize it on our end, as best we can.
            if (
                !angular.isObject(response.data) ||
                !response.data.message
            ) {

                return ($q.reject("An unknown error occurred."));
            }

            // Otherwise, use expected error message.
            return ($q.reject(response.data.message));
        }
    }
})();