{ lib, config, ... }:

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

  # Assets directory (self-contained)
  assetPath = ../../../assets/system/conf/${moduleName};

  # Read required config files
  waybarConfig = "${assetPath}/waybar.conf";
  waybarStyle  = "${assetPath}/style.css";

  # Top-level toggle
  enableProgram = config.enableWaybar or false;
in
{
  # --- Option ---
  options.enableWaybar =
    lib.mkEnableOption "Enable Waybar status bar";

  # --- Config ---
  config = lib.mkIf enableProgram {

    # Install Waybar (symbolic reference expected to be resolved elsewhere)
    environment.systemPackages = [
      "waybar"
    ];

    # Deploy only required files to ~/.config/waybar
    home-manager.users.${username}.xdg.configFile = {

      "waybar/config".source =
        if builtins.pathExists waybarConfig
        then waybarConfig
        else null;

      "waybar/style.css".source =
        if builtins.pathExists waybarStyle
        then waybarStyle
        else null;
    };
  };
}