# greetd login manager for m3-kratos (replaces broken GDM on nixos-unstable).
# Uses tuigreet as the greeter, launching Hyprland after authentication.
{
  pkgs,
  config,
  lib,
  ...
}: let
  tuigreet = "${lib.getExe pkgs.tuigreet}";
  # Use start-hyprland wrapper to avoid Hyprland startup warnings
  # withUWSM=true is set in programs.nix; start-hyprland handles this correctly
  hyprlandCmd = "${config.programs.hyprland.package}/bin/start-hyprland";
in {
  services.greetd = {
    enable = true;

    settings = {
      default_session = {
        user = "greeter";
        # Minimal config: verified supported flags only
        # The --time and --remember are tested; power commands omitted
        # to avoid potential quoting/parsing issues
        command = builtins.concatStringsSep " " [
          tuigreet
          "--time"
          "--remember"
          "--asterisks"
          "--cmd ${hyprlandCmd}"
        ];
      };
    };
  };

  # Required for --remember to persist username between logins
  systemd.tmpfiles.rules = [
    "d /var/cache/tuigreet 0755 greeter greeter - -"
  ];
}