{ config, lib, ... }:
let
  cfg = config.os.srv.ups;
in
{
  options.os.srv.ups.enable = lib.mkEnableOption "enables smooth shutdown on power loss";
  config = lib.mkIf cfg.enable {
    power.ups = {
      enable = true;
      mode = "standalone";

      ups.main = {
        driver = "usbhid-ups";
        port = "auto";
        description = "Main Server UPS";
      };
      users.upsmon = {
        # TODO make password
        passwordFile = "sops";
        upsmon = "master";
      };
      upsmon.monitor.main = {
        system = "main@localhost";
        user = "upsmon";
        # TODO password
        passwordFile = "sops";
        type = "master";
      };
      settings = {
        MINSUPPLIES = 1;
        POWERDOWNFLAG = "/run/killpower";
      };
    };
  };
}