{ config, lib, ... }:

let
  inherit (lib) mkOption types;
  cfg = config.vogon;
in
{
  options.vogon = {
    networking = {
      last-octet = mkOption {
        type = types.listOf (types.ints.between 161 174);
        description = ''
          Liste des derniers octets de l'IPv4 de la machine.
        '';
        example = [ 163 165 ];

      };
      wan-mac = mkOption {
        type = types.str;
        description = '''
          Adresse MAC de l'interface réseau WAN
          qui portera l'IPv4 interne.
        '';
        example = "BC:24:11:B7:AE:80";
      };
    };
  };

  config.systemd.network  = {
    links."10-wan" = {
      matchConfig.MACAddress = cfg.networking.wan-mac;
      linkConfig.Name = "wan";
    };
    networks."10-wan" = {
      matchConfig.Name = "wan";
      address = map (octet: "193.54.193.${toString octet}/28") cfg.networking.last-octet;
      routes = [ { Gateway = "193.54.193.174"; } ];
      linkConfig.RequiredForOnline = "routable";
    };
  };
}