{ lib, pkgs, config, hostname, ... } @ args: let
  inherit (lib) mkOption types;
  cfg = config.chuj.system;
in {
  options.chuj.system = {
      user = mkOption {
        type = types.str;
      };
      host = mkOption {
        type = types.str;
      };
      platform = mkOption {
        type = types.str;
      };
      groups = mkOption {
        type = types.listOf types.str;
        default = [];
      };
      stateVersion = mkOption {
        type = types.str;
        default = "23.11";
      };
  };

  config = {
    networking.hostName = cfg.host;
    users.users.${cfg.user} = {
      isNormalUser = true;
      extraGroups = [ "wheel" ] ++ cfg.groups;
    };
    nixpkgs.hostPlatform = cfg.platform;
    system.stateVersion = cfg.stateVersion;

    time.timeZone = "Europe/Warsaw";
    hardware.pulseaudio.enable = true;
    services.pipewire.enable = false;

    networking = {
      nameservers = [ "9.9.9.9" ];
      networkmanager = {
        enable = true;
        insertNameservers = [ "9.9.9.9" ];
      };
    };

    nix.settings = {
      experimental-features = [ "nix-command" "flakes" ];
      auto-optimise-store = true;
    };
    nixpkgs.overlays = import ../pkgs args;
    nixpkgs.config.allowUnfree = true;

    security.sudo = {
      package = pkgs.sudo.override { withInsults = true; };
      extraConfig = ''
        Defaults pwfeedback
      '';
    };

    environment.systemPackages = with pkgs; let
      nixos-rebuild = lib.getExe pkgs.nixos-rebuild;
      sudo = "/run/wrappers/bin/sudo"; # is this correct
    in [
      ed # is the standard text editor.

      ripgrep
      file
      tree
      btop
      wget
      eza

      zip
      unzip
      # rar
      unrar
      p7zip
      p7zip-rar

      gcc
      gnumake
      python311

      (writeShellScriptBin "rebuild" ''
        set -e
        ulimit -n 4096 # this fixes the "too many open files" error
        ${sudo} ${nixos-rebuild} switch --flake ~/nix#${hostname} -v
      '')
    ];
  };
}