{ config, lib, ... }:
with lib;
let
  cfg = config.nixfiles.modules.endlessh;
in
{
  options.nixfiles.modules.endlessh.enable = mkEnableOption "endlessh";

  config =
    let
      port = 22;
    in
    mkIf cfg.enable {
      services.endlessh = {
        enable = true;
        inherit port;
        extraOptions = [
          "-v"
          "-4"
        ];
      };

      networking.firewall.allowedTCPPorts = [ port ];
    };
}