{ lib, config, inputs, ... }:

let
  username = config.defaultUser or "henrov";

  # Modules directory en switches
  modulesPath = ./generated/parked;
  importedModules = inputs.import-tree modulesPath;
  moduleSwitches = import ./assets/system/modules.conf;

  # Alleen ingeschakelde modules
  enabledModules =
    lib.filterAttrs (name: _: moduleSwitches.${name} or false)
      importedModules.imports;

  moduleList = builtins.attrValues enabledModules;

  # Functie: haal homeManagerExtraUserFragment en forceer het tot veilige attrset
  safeFragment = module:
    let
      frag =
        if builtins.hasAttr "homeManagerExtraUserFragment" module
        then module.homeManagerExtraUserFragment
        else {};
      evaluated =
        if builtins.isFunction frag then frag {} else frag;
    in
      if builtins.isAttrs evaluated then evaluated
      else {};

  # Alle fragments per module
  allFragments = map safeFragment moduleList;

  # Merge alles per gebruiker
  mergedForUser = lib.foldl' lib.mkMerge {} allFragments;

in
{
  networking.hostName = "traveldroid";
  system.stateVersion = "26.05";

  # Top-level key is username → value is attrset
  home-manager.users = {
    "${username}" = mergedForUser;
  };
}