nix-dotfiles/nixosModules/services/displaymanager/service.nix

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

{
  options.tuigreet = {
    enable = lib.mkEnableOption "enables tuigreet with greetd";
  };

  config = lib.mkIf config.tuigreet.enable {
    services.greetd = let 
      wm = 
        if config.hyprland.enable then "Hyprland"
        else (if config.niri.enable then "niri" else null);
    in {
      enable = true;
      package = pkgs.tuigreet;
      settings = {
        default_session = lib.mkIf (wm != null) {
          command = "${pkgs.tuigreet}/bin/tuigreet --time --cmd ${wm}";
          user = "greeter";
        };
      };
    };
  };
}