{ lib
, pkgs
, ...
}:
let
  service-1 = "service-1";
  service-2 = "service-2";

  services = {
    ${service-1} = {
      enable = true;
      description = service-1;
      wants = [ "network-online.target" ];
      after = [
        "network-online.target"
        "avahi-daemon.service"
        "chrony.service"
        "nss-lookup.target"
        "tinc.service"
        "pulseaudio.service"
      ];
      serviceConfig = {
        Type = "oneshot";
        RemainAfterExit = true;
        script = ''
          true
        '';
        ExecReload = "true";
      };
      wantedBy = [ "multi-user.target" ];
    };

    ${service-2} = {
      enable = true;
      description = service-2;
      serviceConfig = {
        Type = "simple";
      };
      partOf = [ "${service-1}.service" ];
      wantedBy = [ "${service-1}.service" ];

      script = ''
        true
      '';
    };
  };
in
{
  options = {
    service-manager.services = lib.mkOption {
      type = with lib.types; listOf str;
    };
  };

  config = {
    service-manager.services = lib.attrNames services;
    systemd = { inherit services; };
  };
}