{ config, pkgs, ... }:

{
    imports = [
        ./common.nix
    ];
    nixpkgs.config.allowUnfree = true;
      
    environment.systemPackages = with pkgs; [
        nvtopPackages.nvidia
    ];

    # Enable OpenGL
    hardware.opengl = {
        enable = true;
    };

    services.xserver.videoDrivers = ["nvidia"];

    hardware.nvidia = {
        # Modesetting is required.
        modesetting.enable = true;

        # Nvidia power management. Experimental, and can cause sleep/suspend to fail.
        # Enable this if you have graphical corruption issues or application crashes after waking
        # up from sleep. This fixes it by saving the entire VRAM memory to /tmp/ instead 
        # of just the bare essentials.
        powerManagement.enable = false;

        # Fine-grained power management. Turns off GPU when not in use.
        # Experimental and only works on modern Nvidia GPUs (Turing or newer).
        powerManagement.finegrained = false;

        # Use the NVidia open source kernel module (not to be confused with the
        # independent third-party "nouveau" open source driver).
        # Support is limited to the Turing and later architectures. Full list of 
        # supported GPUs is at: 
        # https://github.com/NVIDIA/open-gpu-kernel-modules#compatible-gpus 
        # Only available from driver 515.43.04+
        # Currently alpha-quality/buggy, so false is currently the recommended setting.
        open = false;

        # Enable the Nvidia settings menu,
        # accessible via `nvidia-settings`.
        nvidiaSettings = true;

        # Optionally, you may need to select the appropriate driver version for your specific GPU.
        package = config.boot.kernelPackages.nvidiaPackages.stable;
    };

    networking.hostName = "unit2";

    services.openssh = {
        enable = true;
        ports = [ 22 ];
        settings = {
            PasswordAuthentication = false;
            AllowUsers = [ "cody" ];
            UseDns = true;
            X11Forwarding = false;
            PermitRootLogin = "no";
        };
    };

    networking.firewall.allowedTCPPorts = [ 22 ];

    system.autoUpgrade.flake = "/etc/nixos#unit2";

}
