{ config, lib, pkgs, ... }:
{
  imports =
    [
      ./hardware-configuration.nix
      ./bootloader-configuration.nix
      ./surfacebook-configuration.nix
      ./application-configuration.nix
      ./software-development-configuration.nix
      ./school-configuration.nix
      ./virtualisation-configuration.nix
    ];

  # Enable networking and bluetooth
  networking.networkmanager.enable = true;
  systemd.services.NetworkManager-wait-online.enable = false; #disable wait online since it is broken
  networking.hostName = "surface";
  hardware.bluetooth.enable = true;

  # Set time zone.
  time.timeZone = "America/New_York";

  # Select internationalisation properties.
  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";
  };

  # Enable opengl
  hardware.opengl = {
    enable = true;
    driSupport = true;
    driSupport32Bit = true;
  };

  # Allow unfree and insecure packages
  nixpkgs.config.allowUnfreePredicate = pkg: builtins.elem (lib.getName pkg) [
    "vista-fonts"
    "corefonts"

    "steam"
    "steam-original"
    "steam-run"
    "vscode-extension-ms-vscode-cpptools"
    "vscode-extension-ms-vscode-remote-remote-ssh"

    "nvidia-x11"
    "nvidia-settings"
    "nvidia-persistenced"
    "cudatoolkit"

    "vscode"
    "code"
    "Oracle_VM_VirtualBox_Extension_Pack"
  ];

  # Enable the X11 windowing system.
  services.xserver.enable = true;
  services.xserver.videoDrivers = [ "nvidia" ];

  # Enable the KDE Plasma Desktop Environment.
  services.xserver.displayManager.sddm.enable = true;
  services.xserver.desktopManager.plasma5.enable = true;

  # fonts
  fonts.packages = with pkgs; [
    vistafonts
    corefonts
    nerdfonts # nvcahd dependency
  ];

  # Enable sound with pipewire.
  sound.enable = true;
  hardware.pulseaudio.enable = false;
  security.rtkit.enable = true;
  services.pipewire = {
    enable = true;
    alsa.enable = true;
    alsa.support32Bit = true;
    pulse.enable = true;
  };

  # Define a user account. Don't forget to set a password with ‘passwd’.
  users.users.caleb = {
    isNormalUser = true;
    description = "caleb";
    extraGroups = [ "networkmanager" "wheel" ];
    hashedPassword = "$y$j9T$v6EDyPW8C/K.Th4xg8MHL/$tA67k6U0kLtafTNNW2DM7j.xObjPSaZFQ4e/beBX7g2";
    packages = with pkgs;
      [
        # spellcheck
        hunspell
        hunspellDicts.en-us
        hunspellDicts.en-us-large
      ];
  };

  # disable sudo password for wheel 
  security.sudo.wheelNeedsPassword = false;

  # List packages installed in system profile:
  environment.systemPackages = with pkgs; [
    cudaPackages.cudatoolkit
    appimage-run
    git
    protontricks
    steam-run
    wget
    winetricks
    wineWowPackages.stable
    ripgrep # nvchad dependency 
  ];

  #neovim 
  programs.neovim = {
    enable = true;
    defaultEditor = true;
    viAlias = true;
    vimAlias = true;
    configure = {
      packages.nvchad-complete = with pkgs.vimPlugins; {
        start = [
          nvchad
          nvchad-ui
        ];
      };
    };
  };

  # enable mac address randomization
  networking.networkmanager.wifi.macAddress = "random";

  # Enable CUPS to print documents.
  services.printing.enable = true;
  services.printing.drivers = [ pkgs.brlaser ];

  # remote build
  nix.buildMachines = [
    {
      hostName = "talos";
      system = "x86_64-linux";
      protocol = "ssh-ng";
      speedFactor = 4;
      supportedFeatures = [ "nixos-test" "benchmark" "big-parallel" "kvm" ];
      mandatoryFeatures = [ ];
    }
    {
      hostName = "january";
      system = "x86_64-linux";
      protocol = "ssh-ng";
      speedFactor = 3;
      supportedFeatures = [ "nixos-test" "benchmark" "big-parallel" "kvm" ];
      mandatoryFeatures = [ ];
    }
    {
      hostName = "pubnix";
      system = "x86_64-linux";
      protocol = "ssh-ng";
      speedFactor = 2;
      supportedFeatures = [ "nixos-test" "benchmark" "big-parallel" "kvm" ];
      mandatoryFeatures = [ ];
    }
  ];
  nix.distributedBuilds = true;
  # optional, useful when the builder has a faster internet connection than yours
  nix.extraOptions = ''
    builders-use-substitutes = true
  '';

  # This value determines the NixOS release from which the default
  # settings for stateful data, like file locations and database versions
  # on your system were taken. It‘s perfectly fine and recommended to leave
  # this value at the release version of the first install of this system.
  # Before changing this value read the documentation for this option
  # (e.g. man configuration.nix or on https://nixos.org/nixos/options.html).
  system.stateVersion = "23.11";
}