nixos-config/modules/services/gamemode/default.nix

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

let
  cfg = config.ptw.services.gamemode;
in {
  options.ptw.services.gamemode = {
    enable = lib.mkEnableOption "Enable and configure gamemode";
  };

  config = lib.mkIf cfg.enable {
    programs.gamemode = {
      enable = true;
      enableRenice = true;
      settings = {
        general = {
          reaper_freq = 5;
          desiredgov = "performance";
          igpu_desiredgov = "powersave";
          igpu_power_threshold = 0.3;

          softrealtime = "on";
          renice = 0;
          ioprio = 0;
          inhibit_screensaver = 1;
        };

        gpu = {
          amd_performance_level = "high";
        };

        custom = let
          switchScript = groupName: pkgs.writeShellScript "switch-input-group.sh" ''
            ${pkgs.dbus}/bin/dbus-send --print-reply --dest=org.fcitx.Fcitx5 /controller org.fcitx.Fcitx.Controller1.SwitchInputMethodGroup string:'${groupName}'
          '';
          pauseFcitx = switchScript "Group 2";
          resumeFcitx = switchScript "Group 1";
        in {
          start = ''${pauseFcitx}'';
          end = ''${resumeFcitx}'';
        };
      };
    };
  };
}