(function () {
  "use strict";

  var serviceId = "markingSchemeAdminDataContext";
  angular
    .module("markingSchemeAdmin")
    .factory(serviceId, [
      "$q",
      "$http",
      "markingSchemeAdminConfig",
      datacontext,
    ]);

  function datacontext($q, $http, config, $modal) {
    var service = {
      getAllMarkingSchemes: getAllMarkingSchemes,
      getAllMarkingSchemesForUser: getAllMarkingSchemesForUser,
      createMarkingScheme: createMarkingScheme,
      deleteMarkingScheme: deleteMarkingScheme,
      updateMarkingScheme: updateMarkingScheme,
      getMarkingScheme: getMarkingScheme,
      archiveMarkingScheme: archiveMarkingScheme,
      unarchiveMarkingScheme: unarchiveMarkingScheme,
      exportMarkingScheme: exportMarkingScheme,
      importMarkingScheme: importMarkingScheme,
    };

    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;
    }

    // Get all marking schemes
    function getAllMarkingSchemes() {
      var request = $http({
        method: "get",
        url: config.markingSchemeUrl + "schemes" + "?cache=" + Date.now(),
      });

      return request.then(handleSuccess, handleError);
    }

    // Get all marking schemes for user
    function getAllMarkingSchemesForUser() {
      var request = $http({
        method: "get",
        url: config.markingSchemeUrl + "schemes/user" + "?cache=" + Date.now(),
      });

      return request.then(handleSuccess, handleError);
    }

    function getMarkingScheme(markingSchemeId) {
      var request = $http({
        method: "get",
        url: config.markingSchemeUrl + "schemes/" + markingSchemeId,
      });

      return request.then(handleSuccess, handleError).catch(function (ex) {});
    }

    // Creat a marking scheme
    function createMarkingScheme(scheme) {
      var request = $http({
        method: "post",
        url: config.markingSchemeUrl + "schemes",
        data: scheme,
      });

      return request.then(handleSuccess, handleError);
    }

    // Delete a marking scheme
    function deleteMarkingScheme(scheme) {
      var request = $http({
        method: "delete",
        url: config.markingSchemeUrl + "schemes/" + scheme.id,
      });

      return request.then(handleSuccess, handleError);
    }

    // Update a marking scheme
    function updateMarkingScheme(scheme) {
      var request = $http({
        method: "put",
        url: config.markingSchemeUrl + "schemes",
        data: scheme,
      });

      return request.then(handleSuccess, handleError);
    }

    // Archive a marking scheme
    function archiveMarkingScheme(scheme) {
      var request = $http({
        method: "post",
        url: config.markingSchemeUrl + "schemes/" + scheme.id + "/archive",
      });

      return request.then(handleSuccess, handleError);
    }

    // Unarchive a marking scheme
    function unarchiveMarkingScheme(scheme) {
      var request = $http({
        method: "post",
        url: config.markingSchemeUrl + "schemes/" + scheme.id + "/unarchive",
      });

      return request.then(handleSuccess, handleError);
    }

    // Export a marking scheme
    function exportMarkingScheme(scheme) {
      var request = $http({
        method: "post",
        url: config.markingSchemeUrl + "schemes/export/" + scheme.id,
      });

      return request.then(handleSuccess, handleError);
    }

    function importMarkingScheme(file) {
      let fd = new FormData();

      fd.append("file", file);

      var request = $http({
        method: "post",
        url: config.markingSchemeUrl + "schemes/import",
        data: fd,
        headers: {
          "Content-Type": undefined,
        },
      });

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