# greetd login manager for m3-kratos (replaces broken GDM on nixos-unstable).
# Uses tuigreet as the greeter, launching Hyprland after authentication.
{
  pkgs,
  config,
  ...
}: let
  inherit (config.programs.hyprland) package asHyprland;
  tuigreet = "${pkgs.tuigreet}/bin/tuigreet";
  startHyprland = "${asHyprland.package}/bin/start-hyprland";
in {
  services.greetd = {
    enable = true;

    settings = {
      default_session = {
        user = "greeter";
        command = builtins.concatStringsSep " " [
          tuigreet
          "--time"
          "--remember"
          "--remember-session"
          "--remember-user-session"
          "--user-menu"
          "--user-menu-min-uid 1000"
          "--asterisks"
          "--power-shutdown '${config.systemd.package}/bin/systemctl poweroff'"
          "--power-reboot '${config.systemd.package}/bin/systemctl reboot'"
          "--cmd ${startHyprland}"
        ];
      };
    };
  };

  # Required for --remember and --remember-user-session to persist session choices.
  systemd.tmpfiles.rules = [
    "d /var/cache/tuigreet 0755 greeter greeter - -"
  ];
}