{ lib, config, pkgs, flakeRoot, import-tree, home-manager, ... }:

let
  hostname = "traveldroid";

  modulesPath = "${flakeRoot}/generated/modules/${hostname}";
  usersPath   = "${flakeRoot}/generated/users";

  hostModules = import-tree modulesPath;
  globalUsers = import-tree usersPath;

  allModules = hostModules.imports ++ globalUsers.imports;

  #########################################################
  # Merge all _module.args.hmUsers from your modules
  #########################################################
  mergedHmUsers = lib.mkMerge (map (m: if builtins.hasAttr "args" m && builtins.hasAttr "hmUsers" m.args then m.args.hmUsers else {}) allModules);

  #########################################################
  # Add single activation to ensure all parent dirs exist
  #########################################################
  mergedHmUsersWithDirs = lib.mapAttrs (_: userCfg: userCfg // {
    home.activation.ensureDirs = lib.hm.dag.entryAfter ["writeBoundary"] (let
      ensureDirs = files: lib.mapAttrs (_: path: ''
        mkdir -p $(dirname $HOME/${path})
      '') files;
    in
      ensureDirs (builtins.attrNames (userCfg.home.file or {}))
    );
  }) mergedHmUsers;

in
{
  #################################
  # Core system config
  #################################
  networking.hostName = hostname;
  system.stateVersion = "26.05";

  #################################
  # Imports
  #################################
  imports =
    [ ../../../generated/users/henrov.nix
      ./boot.nix
      ./hardware-configuration.nix
    ]
    ++ allModules
    ++ [ home-manager.nixosModules.home-manager ];  # import HM last

  #################################
  # Home Manager integration
  #################################
  home-manager.useGlobalPkgs = true;
  home-manager.useUserPackages = true;

  # Pass the merged user definitions with automatic dir creation
  home-manager.users = mergedHmUsersWithDirs;

  #################################
  # System packages & programs
  #################################
  environment.systemPackages = [
    pkgs.dconf
  ];

  programs.dconf.enable = true;
}