{
  config,
  pkgs,
  service_configs,
  lib,
  ...
}:
let
  grafanaUrl = "http://127.0.0.1:${toString service_configs.ports.private.grafana.port}";

  script = pkgs.writeShellApplication {
    name = "zfs-scrub-annotations";
    runtimeInputs = with pkgs; [
      curl
      jq
      coreutils
      gnugrep
      gnused
      config.boot.zfs.package
    ];
    text = builtins.readFile ./zfs-scrub-annotations.sh;
  };
in
{
  systemd.services.zfs-scrub = {
    environment = {
      GRAFANA_URL = grafanaUrl;
      STATE_DIR = "/run/zfs-scrub-annotations";
    };
    serviceConfig = {
      RuntimeDirectory = "zfs-scrub-annotations";
      ExecStartPre = [ "-${lib.getExe script} start" ];
      ExecStopPost = [ "${lib.getExe script} stop" ];
    };
  };
}