{ config, pkgs, lib, ... }:

{
  options.system = {
    timezone = lib.mkOption { default = "America/Los_Angeles"; };
    extraFonts = lib.mkOption { default = []; };
    extraPkgs = lib.mkOption { default = []; };
    isNonEFI = lib.mkEnableOption 
      "Enable if you are running a non-EFI system";
    users.bigWheels = lib.mkOption { default = []; };
  };
  
  config = lib.mkMerge [
    (lib.mkIf config.system.isNonEFI {
      boot.loader.grub.enable = false;
      boot.loader.generic-extlinux-compatible.enable = true;
    }) 
    (lib.mkIf (!config.system.isNonEFI) {
      boot.kernelPackages = pkgs.linuxPackages_latest;
      boot.loader.systemd-boot.enable = true;
      boot.loader.timeout = 1;
      boot.loader.efi.canTouchEfiVariables = true;
    })
    {
      system.stateVersion = lib.mkDefault "23.05";

      time.timeZone = config.system.timezone;
      i18n.defaultLocale = "en_US.UTF-8";

      # Packages & Default Packages
      nixpkgs.config.allowUnfree = true;
      environment.systemPackages = with pkgs; [
        git
        neovim
        xdg-user-dirs
      ] ++ config.system.extraPkgs;

      # XDG Compliance
      nix.settings.use-xdg-base-directories = true;

      # users = {
      #   users = builtins.listToAttrs (map (
      #     user: {
      #       name = user;
      #       value = {
      #         name = user;
      #         isNormalUser = true;
      #         extraGroups = [ "network" ];
      #       };
      #     }
      #   ) usernameList);
      #   groups = {
      #     wheel = {
      #       members = config.system.users.bigWheels;
      #     };
      #     network = { };
      #   };
      # };

      fonts = {
        enableDefaultPackages = true;
        packages = with pkgs; [
          nerd-fonts.caskaydia-cove
          cascadia-code
          source-han-sans # Pan-CJK font
        ] ++ config.system.extraFonts;
      };
    }
  ];
}