{ config, lib, ... }:
let
  cfg = config.custom.hibernate;
in
{
  options.custom.hibernate.enable = lib.mkOption {
    type = lib.types.bool;
    default = false;
  };

  config = lib.mkIf cfg.enable {
    swapDevices = [
      {
        device = "/var/lib/swapfile";
        size = 16 * 1024;
      }
    ];

    boot = {
      resumeDevice = lib.mkDefault "/dev/mapper/nixos";
    };
  };
}