{ config, ... }:
{
  services = {
    kea = {
      dhcp4 = {
        enable = true;
        settings = {
          # rebind-timer = config.services.kea.dhcp4.settings.valid-lifetime * 0.875;
          # renew-timer = config.services.kea.dhcp4.settings.valid-lifetime * 0.5;
          calculate-tee-times = true; # This makes kea do the same calculation as above
          valid-lifetime = 3600;

          control-socket = {
            socket-type = "unix";
            socket-name = "/run/kea/kea-dhcp4.socket";
          };

          option-def = [
            {
              space = "ubnt";
              name = "unifi-address";
              code = 1;
              type = "ipv4-address";
            }
          ];

          client-classes = [
            {
              name = "ubnt";
              test = "substring(option[60].hex,0,4) == 'ubnt'";
              option-data = [
                {
                  space = "ubnt";
                  name = "vendor-class-identifier";
                  code = 60;
                  data = "ubnt";
                }
                {
                  name = "vendor-encapsulated-options";
                  code = 43;
                }
              ];
              option-def = [
                {
                  name = "vendor-encapsulated-options";
                  code = 43;
                  type = "empty";
                  encapsulate = "ubnt";
                }
              ];
            }
          ];

          interfaces-config = {
            interfaces = [ "eth0" ];
          };

          lease-database = {
            name = "/var/lib/kea/dhcp4.leases";
            persist = true;
            type = "memfile";
          };

          subnet4 = [
            {
              pools = [ { pool = "10.0.0.150 - 10.0.0.200"; } ];
              subnet = "10.0.0.0/24";
              option-data = [
                {
                  name = "domain-name-servers";
                  data = "10.0.0.206";
                }
                {
                  space = "ubnt";
                  name = "unifi-address";
                  code = 1;
                  data = "10.0.0.207";
                }
              ];

              reservations = [
                {
                  hostname = "loki";
                  hw-address = "04:d9:f5:f9:c2:c5";
                  ip-address = "10.0.0.4";
                }
                {
                  hostname = "usw-mini-woonkamer";
                  hw-address = "d0:21:f9:e7:fd:c8";
                  ip-address = "10.0.0.20";
                }
                {
                  hostname = "reolink-deurbel";
                  hw-address = "ec:71:db:5a:e3:21";
                  ip-address = "10.0.0.31";
                }
                {
                  hostname = "shelly-schuur";
                  hw-address = "dc:4f:22:76:4e:3e";
                  ip-address = "10.0.0.40";
                }
                {
                  hostname = "shelly-oven";
                  hw-address = "c4:5b:be:49:fb:e7";
                  ip-address = "10.0.0.41";
                }
                {
                  hostname = "shelly-voordeur";
                  hw-address = "dc:4f:22:76:9d:ee";
                  ip-address = "10.0.0.42";
                }
                {
                  hostname = "iphone-erwin";
                  hw-address = "60:57:c8:0b:6b:ac";
                  ip-address = "10.0.0.70";
                }
                {
                  hostname = "ipad-erwin";
                  hw-address = "14:99:e2:cb:38:78";
                  ip-address = "10.0.0.71";
                }
                {
                  hostname = "appletv-woonkamer";
                  hw-address = "f0:b3:ec:52:23:51";
                  ip-address = "10.0.0.80";
                }
                {
                  hostname = "sonos-woonkamer";
                  hw-address = "34:7e:5c:dc:f4:34";
                  ip-address = "10.0.0.81";
                }
                {
                  hostname = "smile033188";
                  hw-address = "c4:93:00:03:31:89";
                  ip-address = "10.0.0.82";
                }
                {
                  hostname = "sonos-hobbykamer";
                  hw-address = "00:0e:58:5f:a9:06";
                  ip-address = "10.0.0.83";
                }
                {
                  hostname = "3dprinter-wlan";
                  hw-address = "b8:27:eb:51:ec:4e";
                  ip-address = "10.0.0.120";
                }
                {
                  hostname = "3dprinter";
                  hw-address = "b8:27:eb:04:b9:1b";
                  ip-address = "10.0.0.121";
                }
                {
                  hostname = "thor";
                  hw-address = "d8:3a:dd:17:9b:d0";
                  ip-address = "10.0.0.122";
                }
                {
                  hostname = "thor-wlan";
                  hw-address = "d8:3a:dd:17:9b:d1";
                  ip-address = "10.0.0.123";
                }
              ];
            }
          ];
        };
      };
    };

    prometheus.exporters.kea = {
      enable = true;
      controlSocketPaths = [ config.services.kea.dhcp4.settings.control-socket.socket-name ];
    };
  };
}