(function () {
	'use strict';

	var serviceId = 'coursesDataContext';
	angular.module('courses').factory(serviceId, ['$q', '$http', 'coursesConfig', '$modal', datacontext]);


	function datacontext($q, $http, config, $modal) {

		var service = {
            getCourses: getCourses,
            getCoursesIncludingParents: getCoursesIncludingParents,
            getCourse: getCourse,
            deleteCourse: deleteCourse,
            updateCourse: updateCourse,
            createCourse: createCourse
		};

		return service;

		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));
		}


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

		function getCourses(organisationId) {
			var request = $http({
				method: "get",
                url: config.apigatewayUrl + 'coursetraining/api/courses/organisation/' + organisationId
			});

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

        function getCoursesIncludingParents(organisationId) {
            var request = $http({
                method: "get",
                url: config.apigatewayUrl + '/coursetraining/api/courses/organisation/' + organisationId + '?includeParents=true'
            });

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

        function getCourse(courseId) {
            var request = $http({
                method: "get",
                url: config.apigatewayUrl + 'coursetraining/api/courses/' + courseId
            });

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

        function deleteCourse(courseId) {
            var request = $http({
                method: "delete",
                url: config.apigatewayUrl + 'coursetraining/api/courses/' + courseId
            });

            return (request.then(handleSuccess, handleError));
        }
        function updateCourse(courseId, course) {
            var request = $http({
                method: "put",
                url: config.apigatewayUrl + 'coursetraining/api/courses/' + courseId,
                data:course
            });

            return (request.then(handleSuccess, handleError));
        }
        function createCourse(course) {
            var request = $http({
                method: "post",
                url: config.apigatewayUrl + 'coursetraining/api/courses/',
                data: course
            });

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


})();