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

let
  moduleName = "nixos-printers";
in
{
  # ---- Printing (CUPS) ----
  services.printing = {
    enable = true;
    # Good general compatibility. Many modern printers work driverless (IPP Everywhere),
    # but these help with older models and various formats.
    drivers = with pkgs; [
      cups-filters
      gutenprint
    ];
  };

  # ---- Network printer discovery (mDNS / DNS-SD) ----
  services.avahi = {
    enable = true;
    # Resolve .local names + discover services on IPv4
    nssmdns4 = true;
    # You're controlling firewall rules in firewall.nix
    openFirewall = false;
  };

  # ---- Optional GUI tool to add/manage printers ----
  environment.systemPackages = with pkgs; [
    system-config-printer
  ];

  # allow admin actions in printer GUI (usually already present on desktop systems)
  security.polkit.enable = true;
  environment.etc."nixlog/loaded.${moduleName}".text = "loaded\n";
}