{
  config,
  pkgs,
  inputs,
  lib,
  ...
}:

{
  options = {
    apps.sync = {
      kde-connect = {
        enable = lib.mkEnableOption "enable kde-connect";
      };
      nextcloud = {
        enable = lib.mkEnableOption "enable nextcloud client";
      };
      syncthing = {
        enable = lib.mkEnableOption "enable syncthing";
        devices = lib.mkOption {
          default = { };
          description = ''
            set syncthing devices
          '';
        };
        folders = lib.mkOption {
          default = { };
          description = ''
            set syncthing folders
          '';
        };
      };
    };
  };
  config = {
    environment.systemPackages =
      with pkgs;
      [ ]
      ++ (
        if config.apps.sync.nextcloud.enable then
          [
            nextcloud-client
          ]
        else
          [ ]
      );
    programs = {
      kdeconnect =
        if config.apps.sync.kde-connect.enable then
          {
            enable = true;
          }
        else
          { };
    };
    services = {
      syncthing =
        if config.apps.sync.syncthing.enable then
          {
            enable = true;
            guiAddress = "0.0.0.0:8384";
            settings = {
              devices = config.apps.sync.syncthing.devices;
              folders = config.apps.sync.syncthing.folders;
            };
            overrideDevices = if (config.apps.sync.syncthing.devices == { }) then false else true;
            overrideFolders = if (config.apps.sync.syncthing.folders == { }) then false else true;
          }
        else
          { };
    };
  };
}