{ lib, pkgs, config, ... }:
let
  configurer = pkgs.substituteAll {
    src = ./configurer.py;
    isExecutable = true;

    python = pkgs.python3.withPackages (ps: with ps; [ pyyaml ]);
    utilLinux = pkgs.util-linux;
    wireguardTools = pkgs.wireguard-tools;
    systemd = config.systemd.package;
    iwd = config.networking.wireless.iwd.package;
  };
in
{
  config = {
    systemd = {
      services = {
        qclk-configurer = {
          description = "qclk dynamic configurer";
          after = [ "network.target" ];

          serviceConfig = {
            Type = "notify-reload";
            ExecStart = "${configurer} serve";
          };

          wantedBy = [ "multi-user.target" ];
        };
      };
    };

    services = {
      udev.extraRules = ''
        SUBSYSTEM=="block", ACTION=="add", ENV{ID_BUS}=="usb", ENV{ID_FS_TYPE}=="vfat", RUN+="${configurer} ext-load %E{ID_PATH_TAG} %N"
      '';
    };
  };
}