{
  lib,
  config,
  pkgs,
  ...
}:
let
  types = {
    mount = lib.types.submodule {
      options = {
        path = lib.mkOption {
          type = lib.types.str;
          default = "/";
        };
        user = lib.mkOption {
          type = lib.types.str;
        };
        uid = lib.mkOption {
          type = lib.types.nullOr lib.types.int;
          default = null;
        };
        gid = lib.mkOption {
          type = lib.types.nullOr lib.types.int;
          default = null;
        };
      };
    };
  };

  cfg = config.modules.storageBoxMounts;
  secrets = config.age.secrets;

  mountOptions =
    { uid, gid, ... }:
    [
      "x-systemd.automount"
      "auto"
      "x-systemd.device-timeout=5s"
      "x-systemd.mount-timeout=5s"
      "credentials=${secrets.storage-box-credentials.path}"
    ]
    ++ (if (uid != null) then [ "uid=${toString uid}" ] else [ ])
    ++ (if (gid != null) then [ "gid=${toString gid}" ] else [ ]);
in
{
  options.modules.storageBoxMounts = lib.mkOption {
    type = lib.types.attrsOf types.mount;
    default = { };
  };

  config = {
    fileSystems = lib.mapAttrs (
      _:
      { path, user, ... }@options:
      {
        device = "//${user}.your-storagebox.de${path}";
        fsType = "cifs";
        options = mountOptions options;
      }
    ) cfg;

    environment.systemPackages = lib.mkIf ((lib.length (lib.attrNames cfg)) > 0) [ pkgs.cifs-utils ];
  };
}