(function () {
    'use strict';

    var serviceId = 'skillsPassportsDataContext';

    //note: job role training requirements data lives in course training hence coursesConfig.
    angular.module('skillsPassportsManager').factory(serviceId, ['$q', '$http', 'coursesConfig', '$modal', datacontext]);


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

        //note: a job role must exist for there to be training requirements, hence there are just functions to get them and update them
        var service = {
            getJobRoleTrainingRequirementsForJobRole: getJobRoleTrainingRequirementsForJobRole,
            getJobRoleTrainingRequirementsForJobRoles: getJobRoleTrainingRequirementsForJobRoles,
            updateJobRoleTrainingRequirements: updateJobRoleTrainingRequirements,
            updateUserTrainingRequirements: updateUserTrainingRequirements
        };

        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 getJobRoleTrainingRequirementsForJobRole(jobRoleId) {
            var request = $http({
                method: "get",
                url: config.apigatewayUrl + 'coursetraining/api/jobroles/trainingrequirements/jobrole/' + jobRoleId
            });

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

        function getJobRoleTrainingRequirementsForJobRoles(jobRoleIds) {
            var request = $http({
                method: "post",
                url: config.apigatewayUrl + 'coursetraining/api/jobroles/trainingrequirements/jobroles',
                data: jobRoleIds
            });

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

        function updateJobRoleTrainingRequirements(jobRoleId, courseIds) {
            var request = $http({
                method: "put",
                url: config.apigatewayUrl + 'coursetraining/api/jobroles/trainingrequirements/' + jobRoleId + '/courses',
                data: courseIds
            });

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

        /*
         * Give a user relevant training requirements according to their job roles
         */
        function updateUserTrainingRequirements(userId, jobRoleIds) {
            var request = $http({
                method: "put",
                url: config.apigatewayUrl + 'coursetraining/api/UserTrainingRequirements/users/' + userId + '/jobroles/trainingRequirements',
                data: {
                    userId: userId,
                    jobRoleIds: jobRoleIds
                }
            });

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


})();