{ ... }:

{
  flake.nixosModules.core = { config, lib, pkgs, ... }:
let
  cfg = config.mySystem.system.core;
in {
    options.mySystem.system.core.enable = lib.mkEnableOption "Core System Settings";

    config = lib.mkIf cfg.enable {
      
      # --- Flakes & Nix Settings ---
      nix.settings = {
        experimental-features = [ "nix-command" "flakes" ];
        download-buffer-size = 536870912; # 512 MB
	cores = 2;
	max-jobs = 1;
      };

      nixpkgs.config.allowUnfree = true;

      # --- Kernel ---
      boot.kernelPackages = pkgs.linuxPackages_latest;

      # --- Networking ---
      networking.networkmanager.enable = true;

      # --- Time & Locale ---
      time.timeZone = "America/Chicago";
      i18n.defaultLocale = "en_US.UTF-8";
      i18n.extraLocaleSettings = {
        LC_ADDRESS = "en_US.UTF-8";
        LC_IDENTIFICATION = "en_US.UTF-8";
        LC_MEASUREMENT = "en_US.UTF-8";
        LC_MONETARY = "en_US.UTF-8";
        LC_NAME = "en_US.UTF-8";
        LC_NUMERIC = "en_US.UTF-8";
        LC_PAPER = "en_US.UTF-8";
        LC_TELEPHONE = "en_US.UTF-8";
        LC_TIME = "en_US.UTF-8";
      };

      # --- X11 & Login Manager ---
      services.xserver.enable = true;
      mySystem.system.login-manager.enable = true;
      services.xserver.xkb = {
        layout = "us";
        variant = "";
      };

      # --- Services (Printing & Audio) ---
      services.printing.enable = true;
      services.pulseaudio.enable = false;
      security.rtkit.enable = true;
      services.pipewire = {
        enable = true;
        alsa.enable = true;
        alsa.support32Bit = true;
        pulse.enable = true;
      };

      # --- User Account ---
      users.users.shonh = {
        isNormalUser = true;
        description = "Shonh";
        extraGroups = [ "networkmanager" "wheel" ];
      };
      
      # --- Home Manager Base ---
      home-manager = {
        backupFileExtension = "backup";

        users.shonh = {
	  home.sessionVariables = {
	    TERMINAL = "foot";
	    EDITOR = "nvim";
	    BROWSER = "vivaldi";
	  };

          home.stateVersion = "25.11";
        };
      };

      # --- Base Applications ---
      environment.systemPackages = with pkgs; [
        tree
        sl
        vivaldi
      ];
    };
  };
}