{ config, pkgs, lib, ... }:

let
  dnsname = "site3.feal.no";
in {
  # Defines DDNS_TOKEN and DDNS_SECRET from https://domene.shop/admin?view=api
  sops.secrets."domeneshop/env" = { };

  systemd.services.domeneshop-dyndns = {
    serviceConfig.EnvironmentFile = config.sops.secrets."domeneshop/env".path;
    startAt = "*/10 * * * *";

    script = ''
      DNSNAME="${dnsname}"
      NEW_IP="$(${lib.getExe pkgs.curl} --silent https://ipinfo.io/ip)"
      OLD_IP="$(${lib.getExe pkgs.getent} hosts "$DNSNAME" | ${lib.getExe pkgs.gawk} '{ print $1 }')"

      if [[ "$NEW_IP" != "$OLD_IP" ]]; then
        echo "Old IP ($OLD_IP) does not match new IP ($NEW_IP), updating..."
        ${lib.getExe pkgs.curl} --silent "https://$DDNS_TOKEN:$DDNS_SECRET@api.domeneshop.no/v0/dyndns/update?hostname=$DNSNAME&myip=$NEW_IP"
      else
        echo "Old IP ($OLD_IP) matches new IP ($NEW_IP), exiting..."
      fi
    '';
  };
}