{config,lib,pkgs,...}:
let
  inherit (lib) mkEnableOption mkOption optionalString mkIf types;
  dmcfg = config.services.xserver.displayManager;
  cfg = config.speccon18.desktop.tuigreet;
  gduser = config.services.greetd.settings.default_session.user;
in {
  options.speccon18.desktop.tuigreet = {
    enable = mkEnableOption "enables tuigreet";
    args = mkOption {
      default = "--time --asterisks --remember -s ${dmcfg.sessionData.desktops}/share/wayland-sessions:${dmcfg.sessionData.desktops}/share/xsessions";
      type = types.str;
    };
  };
  config = mkIf cfg.enable {
    services.greetd = {
      enable = true;
      settings = {
        default_session = {
          command = "${pkgs.greetd.tuigreet}/bin/tuigreet ${cfg.args}";
          user = "greeter";
        };
      };
    };
    # this is a life saver.
    # literally no documentation about this anywhere.
    # might be good to write about this...
    # https://www.reddit.com/r/NixOS/comments/u0cdpi/tuigreet_with_xmonad_how/
    systemd = {
      services.greetd.serviceConfig = {
        Type = "idle";
        StandardInput = "tty";
        StandardOutput = "tty";
        StandardError = "journal"; # Without this errors will spam on screen
        # Without these bootlogs will spam on screen
        TTYReset = true;
        TTYVHangup = true;
        TTYVTDisallocate = true;
      };
      tmpfiles.rules = [
        "d /var/cache/tuigreet/ 0755 greeter ${gduser} - -"
      ];
    };
  };
}