{
  config,
  lib,
  pkgs,
  nodes,
  sources,
  ...
}:
let
  host = "catvayor.sh";
in
{
  imports = [
    "${sources.nixos-mailserver}"
    ./hardware-configuration.nix
    ./disks.nix
    ./modo.nix
  ];

  kat.proxies = {
    ip = "192.168.122.3";
    aliases = [ "catvayor.sh" ];
    open-tcp = [
      {
        internal = 22;
        external = 22002;
      }
      25
      465
      993
    ];
  };

  boot.loader = {
    systemd-boot.enable = true;
    efi.canTouchEfiVariables = true;
  };

  kat.wireguardPubKey = "Znj451+hGJcPV1zFgpRMA8hg8edmUInA5zBtYBUuL3k=";
  systemd.network = {
    networks = {
      "10-enp1s0" = {
        name = "enp1s0";
        address = [
          "192.168.122.3/24"
          "fe80::3/64"
        ];
        routes = [
          {
            Destination = "10.42.0.2/32";
            Gateway = "192.168.122.1";
          }
        ];
        dns = [ "192.168.122.1" ];
      };
      "50-wg0" = {
        name = "wg0";
        address = [ "10.42.2.1/16" ];
        routes = [
          {
            Gateway = "10.42.0.2";
          }
        ];
      };
    };
    netdevs = {
      "50-wg0" = {
        netdevConfig = {
          Name = "wg0";
          Kind = "wireguard";
        };
        wireguardConfig = {
          PrivateKeyFile = "/wg/private.key";
        };

        wireguardPeers = [
          {
            Endpoint = "10.42.0.2:1194";
            AllowedIPs = [
              "0.0.0.0/0"
            ];
            PersistentKeepalive = 20;
            PublicKey = nodes.kat-watcher.config.kat.wireguardPubKey;
          }
        ];
      };
    };
  };

  networking.useDHCP = false;

  services.openssh.enable = true;

  networking.firewall.enable = false;

  security.acme = {
    acceptTerms = true;
    defaults.email = "root@katvayor.net";
  };
  services.nginx = {
    enable = true;
    virtualHosts."catvayor.sh".enableACME = true;
    virtualHosts."betamail.katvayor.net" = {
      enableACME = true;
      addSSL = true;
      locations."/" = {
        recommendedProxySettings = true;
        proxyPass = "http://localhost:8000/";
      };
    };
  };

  mailserver = {
    enable = true;
    fqdn = "betamail.katvayor.net";
    domains = [ host ];

    loginAccounts = {
      "root@${host}" = {
        catchAll = [ host ];
        aliases = builtins.genList (id: "user${toString id}@${host}") 10 ++ [
          "moderators@${host}"
          "daemon@${host}"
        ];
        hashedPassword = "$2b$05$FoCVDECXYG0KXPigPuIZtuNFiviwSg8RuXx0FbnzC7ZRp.Mz8VWOe";
      };
    };

    certificateScheme = "acme";
  };

  system.stateVersion = "23.11";
}