{
  lib,
  config,
  pkgs,
  ...
}:
let
  cfg = config.services.arma;
in
{
  options.services.arma = {
    enable = lib.mkEnableOption "enable arma";
    dataDir = lib.mkOption {
      type = lib.types.str;
      default = "/var/lib/steam";
    };
  };
  config = lib.mkIf cfg.enable {
    nixpkgs.config.allowUnfreePredicate =
      pkg:
      builtins.elem (lib.getName pkg) [
        "steamcmd"
        "steam-run"
        "steam-unwrapped"
      ];
    # Create steam user
    users = {
      users.steam = {
        isSystemUser = true;
        home = cfg.dataDir;
        createHome = true;
        shell = pkgs.bash;
        group = "steam";
      };
      groups.steam = { };
    };
    systemd.tmpfiles.rules = [
      # "d /var/lib/steam 0755 steam steam -"
      "d ${cfg.dataDir}/reforger/configs 0755 steam steam -"
      "d ${cfg.dataDir}/reforger/profile 0755 steam steam -"
      "d ${cfg.dataDir}/reforger/workshop 0755 steam steam -"
    ];
    systemd.services = {
      arma = {
        description = "arma game server";
        wantedBy = [ "multi-user.target" ];
        environment = {
          ARMA_DIR = "${cfg.dataDir}";
        };
        path = with pkgs; [
          curl
          steamcmd
          steam-run
        ];
        preStart = "${pkgs.arma-scripts}/scripts/update.sh";
        serviceConfig = {
          User = "steam";
          WorkingDirectory = "${cfg.dataDir}/reforger";
          ExecStart = "${pkgs.arma-scripts}/scripts/start.sh";
        };
      };
    };
  };
}