{ lib, config, ... }:

let
  # --- Module variables ---
  moduleName = "wayland";
  username   = config.defaultUser or "henrov";

  # Assets directory (optional)
  assetPath =
    if builtins.pathExists ../../../assets/system/conf/${moduleName}
    then ../../../assets/system/conf/${moduleName}
    else null;

  programFiles =
    if assetPath != null
    then builtins.readDir assetPath
    else {};

  files = lib.genAttrs (builtins.attrNames programFiles) (name: {
    src = "${assetPath}/${name}";
  });

  # Top-level toggle for this module
  enableProgram = config.enableWayland or true;
in
{
  # --- Declare the top-level toggle ---
  options.enableWayland = lib.mkEnableOption "Enable Wayland + portals";

  # --- Only apply configuration if enabled ---
  config = lib.mkIf enableProgram {

    # Example dendritic container (flat, self-contained)
    wayland = {
      enable    = true;
      user      = username;
      assetsDir = assetPath;
      files     = files;

      # Wayland-specific metadata
      portals = [ "hyprland" ];
    };

    # Deploy assets to user's XDG config if they exist
    home-manager.users.${username} = lib.mkIf assetPath != null {
      xdg.configFile =
        lib.mapAttrs' (name: value: {
          name  = "${moduleName}/${name}";
          value.source = value.src;
        }) files;
    };

    # Example portal + packages configuration
    home-manager.users.${username} = {
      xdg.portal = {
        enable = true;

        # Only reference pkgs if unavoidable
        extraPortals = [
          config.pkgs.xdg-desktop-portal-hyprland
        ];

        config.hyprland = {
          "org.freedesktop.impl.portal.Screencast" = [ "hyprland" ];
        };
      };

      home.packages = [
        config.pkgs.uwsm
      ];
    };

    # Optional systemd service to sync configs (if needed)
    systemd.services."${moduleName}-sync" = {
      description = "Sync ${moduleName} configuration";
      wantedBy    = [ "multi-user.target" ];
      wants       = [ "network-online.target" ];
      after       = [ "network-online.target" ];

      serviceConfig = {
        Type = "oneshot";
        ExecStart = ''
          set -euo pipefail
          if [ -d "${assetPath}" ]; then
            for f in ${lib.concatStringsSep " " (builtins.attrNames files)}; do
              cp -u "${assetPath}/$f" "/home/${username}/.config/${moduleName}/$f"
            done
          fi
        '';
      };

      restartTriggers = [ assetPath ];
      path = [];
    };
  };
}