function SuperUserAdminCtrl($scope, $timeout, ApiService, Features, UserService, AngularPollChannel, CoreDialog) {
  if (!Features.SUPER_USERS) {
    return;
  }

  // Monitor any user changes and place the current user into the scope.
  UserService.updateUserIn($scope);

  $scope.configStatus = null;
  $scope.logsCounter = 0;
  $scope.newUser = {};
  $scope.createdUser = null;
  $scope.systemUsage = null;
  $scope.debugServices = null;
  $scope.debugLogs = null;
  $scope.pollChannel = null;
  $scope.logsScrolled = false;
  $scope.csrf_token = window.__token;

  $scope.showCreateUser = function() {
    $scope.createdUser = null;
    $('#createUserModal').modal('show');
  };

  $scope.viewSystemLogs = function(service) {
    if ($scope.pollChannel) {
      $scope.pollChannel.stop();
    }

    $scope.debugService = service;
    $scope.debugLogs = null;

    $scope.pollChannel = AngularPollChannel.create($scope, $scope.loadServiceLogs, 2 * 1000 /* 2s */);
    $scope.pollChannel.start();
  };

  $scope.loadServiceLogs = function(callback) {
    if (!$scope.debugService) { return; }

    var params = {
      'service': $scope.debugService
    };

    var errorHandler = ApiService.errorDisplay('Cannot load system logs. Please contact support.',
      function() {
        callback(false);
      })

    ApiService.getSystemLogs(null, params, /* background */true).then(function(resp) {
      $scope.debugLogs = resp['logs'];
      callback(true);
    }, errorHandler);
  };

  $scope.loadDebugServices = function() {
    if ($scope.pollChannel) {
      $scope.pollChannel.stop();
    }

    $scope.debugService = null;

    ApiService.listSystemLogServices().then(function(resp) {
      $scope.debugServices = resp['services'];
    }, ApiService.errorDisplay('Cannot load system logs. Please contact support.'))
  };

  $scope.getUsage = function() {
    if ($scope.systemUsage) { return; }

    ApiService.getSystemUsage().then(function(resp) {
      $scope.systemUsage = resp;
    }, ApiService.errorDisplay('Cannot load system usage. Please contact support.'))
  }

  $scope.loadUsageLogs = function() {
    $scope.logsCounter++;
  };

  $scope.loadUsers = function() {
    if ($scope.users) {
      return;
    }

    $scope.loadUsersInternal();
  };

  $scope.loadUsersInternal = function() {
    ApiService.listAllUsers().then(function(resp) {
      $scope.users = resp['users'];
      $scope.showInterface = true;
    }, function(resp) {
      $scope.users = [];
      $scope.usersError = resp['data']['message'] || resp['data']['error_description'];
    });
  };

  $scope.showChangePassword = function(user) {
    $scope.userToChange = user;
    $('#changePasswordModal').modal({});
  };

  $scope.createUser = function() {
    $scope.creatingUser = true;
    $scope.createdUser = null;

    var errorHandler = ApiService.errorDisplay('Cannot create user', function() {
      $scope.creatingUser = false;
      $('#createUserModal').modal('hide');
    });

    ApiService.createInstallUser($scope.newUser, null).then(function(resp) {
      $scope.creatingUser = false;
      $scope.newUser = {};
      $scope.createdUser = resp;
      $scope.loadUsersInternal();
    }, errorHandler)
  };

  $scope.showDeleteUser = function(user) {
    if (user.username == UserService.currentUser().username) {
      bootbox.dialog({
        "message": 'Cannot delete yourself!',
        "title": "Cannot delete user",
        "buttons": {
          "close": {
            "label": "Close",
            "className": "btn-primary"
          }
        }
      });
      return;
    }

    $scope.userToDelete = user;
    $('#confirmDeleteUserModal').modal({});
  };

  $scope.changeUserPassword = function(user) {
    $('#changePasswordModal').modal('hide');

    var params = {
      'username': user.username
    };

    var data = {
      'password': user.password
    };

    ApiService.changeInstallUser(data, params).then(function(resp) {
      $scope.loadUsersInternal();
    }, ApiService.errorDisplay('Could not change user'));
  };

  $scope.deleteUser = function(user) {
    $('#confirmDeleteUserModal').modal('hide');

    var params = {
      'username': user.username
    };

    ApiService.deleteInstallUser(null, params).then(function(resp) {
      $scope.loadUsersInternal();
    }, ApiService.errorDisplay('Cannot delete user'));
  };

  $scope.sendRecoveryEmail = function(user) {
    var params = {
      'username': user.username
    };

    ApiService.sendInstallUserRecoveryEmail(null, params).then(function(resp) {
      bootbox.dialog({
        "message": "A recovery email has been sent to " + resp['email'],
        "title": "Recovery email sent",
        "buttons": {
          "close": {
            "label": "Close",
            "className": "btn-primary"
          }
        }
      });

    }, ApiService.errorDisplay('Cannot send recovery email'))
  };

  $scope.checkStatus = function() {
    ApiService.scRegistryStatus(null, null).then(function(resp) {
      $scope.configStatus = resp['status'];
      if ($scope.configStatus == 'ready') {
        $scope.loadUsers();
      } else {
        var message = "Installation of this product has not yet been completed." +
                      "<br><br>Please read the " +
                      "<a href='https://coreos.com/docs/enterprise-registry/initial-setup/'>" +
                      "Setup Guide</a>"

        var title = "Installation Incomplete";
        CoreDialog.fatal(title, message);
      }
    }, ApiService.errorDisplay('Cannot load status. Please report this to support'), /* background */true);
  };

  // Load the initial status.
  $scope.checkStatus();
}