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

with lib;

let
  cfg = config.networking;

  hostName = optionalString (cfg.hostName != null) ''
    scutil --set ComputerName '${cfg.hostName}'
    scutil --set LocalHostName '${cfg.hostName}'
    scutil --set HostName '${cfg.hostName}'
  '';
in

{
  options = {
    networking.hostName = mkOption {
      type = types.nullOr types.str;
      default = null;
      example = "myhostname";
      description = "Hostname for your machine.";
    };
  };

  config = {

    system.defaults.smb.NetBIOSName = cfg.hostName;

    system.activationScripts.networking.text = ''
      # Set defaults
      echo "configuring networking..." >&2

      ${hostName}
    '';

  };
}