{ lib, pkgs, config, ...} @ 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;
    
    networking.networkmanager = {
      enable = true;
      dns = "systemd-resolved";
    };
    services.resolved = {
      enable = true;
      fallbackDns = [
        "9.9.9.9"
        "2620:fe::fe"
      ];
    };

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

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

    environment.systemPackages = with pkgs; [
      ed # is the standard text editor.

      ripgrep
      file
      tree
      btop
      wget

      zip
      unzip
      rar
      unrar
      p7zip
      p7zip-rar

      gcc
      gnumake
      python311
    ];
  };
}