{ lib, config, xml, ... }:
let
  inherit (lib)
    mkOption
    mkEnableOption
    mapAttrsToList
    mkIf
    mkMerge
    ;
  inherit (lib.types)
    attrsOf
    submodule
    ;

  interface-module =
    { name, config, ... }:
    {
      options = {
        enable = mkEnableOption "the PoE for this interface";
        xml = mkOption {
          type = xml.type;
          visible = false;
          readOnly = true;
        };
      };
      config.xml = mkMerge [
        { inherit name; }
        (mkIf (!config.enable) { disable = { }; })
      ];
    };
in
{
  options = {
    poe.interfaces = mkOption {
      type = attrsOf (submodule interface-module);
      default = { };
      description = ''
        PoE configuration of interfaces.
      '';
    };
  };
  config.netconf.xml.poe = {
    "@operation" = "replace";
    interface = mapAttrsToList (_: intf: intf.xml) config.poe.interfaces;
  };
}