{
  pkgs,
  lib,
  config,
  ...
}:
with lib;
{
  options.global.jovian = mkEnableOption "set up Jovian NixOS" // {
    default = true;
  };

  config = mkIf config.global.jovian {
    jovian = {
      hardware.has.amd.gpu = true;
      steamos.useSteamOSConfig = true;
      steamos.enableDefaultCmdlineConfig = false;

      steam = {
        enable = true;
        autoStart = true;
        desktopSession = "plasma";
        user = "app";
      };
    };

    users.home.persistApp.directories = [
      ".steam"
      ".local/share/Steam"
      ".config/gamescope"
      ".config/hhd"
      ".kodi"
    ];

    users.users.app.extraGroups = [
      "networkmanager"
      "gamemode"
    ];
    programs.gamemode.enable = true;
    programs.regreet.enable = false;
    home.plasma.enable = true;
    home.plasma.extraConfig = {
      configFile = {
        kwinrc.Xwayland.Scale = 1.75;
        kscreenlockerrc.Daemon.Autolock = false;
      };
    };

    home-manager.users.app = {
      home.packages = with pkgs; [
        (pkgs.kodi-wayland.passthru.withPackages (
          kodiPkgs: with kodiPkgs; [
            joystick # keymap steam-controller
            #controller-topology-project
            libretro
            libretro-2048
            libretro-fuse
            libretro-genplus
            libretro-mgba
            libretro-nestopia
            libretro-snes9x
            jellycon
          ]
        ))
      ];

      home.pointerCursor = {
        package = pkgs.steamdeck-hw-theme;
        name = "steam";
      };
    };

    services.handheld-daemon = {
      enable = true;
      user = "app";
    };

    jovian.decky-loader = {
      # ~/.steam/steam/.cef-enable-remote-debugging
      enable = true;
      user = "app";
      extraPackages = with pkgs; [
        curl
        unzip
        util-linux
        gnugrep
        procps
        pciutils
        kmod
        ryzenadj
      ];
      extraPythonPackages =
        pythonPackages: with pythonPackages; [
          hid
          pyyaml
        ];
      stateDir = "/nix/persist/decky";
    };

    boot.kernelParams = [
      "iomem=relaxed"
      "amd_pstate=passive"
    ];

    services.udev.extraRules = ''
      SUBSYSTEM=="power_supply", ATTR{online}=="0", RUN+="${pkgs.ryzenadj}/bin/ryzenadj --max-performance"
    '';
  };
}