{
  config,
  lib,
  pkgs,
  ...
}:
let
  cfg = config.bagel.monitoring.exporters.hydra;

  python = pkgs.python3.withPackages(ps: [
    ps.aioprometheus
    ps.click
    ps.httpx
    ps.starlette
    ps.uvicorn
  ]);

  inherit (lib) escapeShellArg getExe mkEnableOption mkIf mkOption types;
in
{
  options.bagel.monitoring.exporters.hydra = {
    enable = mkEnableOption "bagel flavored Hydra exporter";
    hydraUrl = mkOption {
      type = types.str;
      default = "https://hydra.forkos.org/";
      description = "URL to the Hydra to monitor";
    };
  };

  config = mkIf cfg.enable {
    systemd.services.hydra-exporter = {
      wantedBy = [ "multi-user.target" ];
      description = "Hydra exporter";
      script = "${getExe python} ${./hydra-exporter.py} --hydra-url=${escapeShellArg cfg.hydraUrl} --port=9105";
    };

    bagel.monitoring.grafana-agent.exporters.hydra.port = 9105;
  };
}