{ config, pkgs, ... }:

{
  imports =
    [
      ./hardware-configuration.nix
    ];

  nixpkgs.config.allowUnfree = true;

  boot.kernelPackages = pkgs.linuxPackages_latest;

  # Use the systemd-boot EFI boot loader.
  boot.loader.systemd-boot.enable = true;
  boot.loader.efi.canTouchEfiVariables = true;

  networking.hostName = "london";

  # i18n stuff.
  time.timeZone = "Europe/London";
  i18n.defaultLocale = "en_US.UTF-8";
  console = {
    font = "Lat2-Terminus16";
    keyMap = "us";
  };

  # Networking stuff.
  networking.useDHCP = false;
  networking.interfaces.enp4s0.useDHCP = true;
  services.tailscale.enable = true;

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

  hardware.opengl = {
    enable = true;
    extraPackages = with pkgs; [
      vaapiIntel
      vaapiVdpau
      libvdpau-va-gl
    ];
    setLdLibraryPath = true;
    driSupport32Bit = true;
  };
  # Required for Proton games to function.
  programs.steam.enable = true;

  # Enable the GNOME Desktop Environment.
  services.xserver.displayManager.gdm.enable = true;
  services.xserver.desktopManager.gnome.enable = true;

  # Configure keymap in X11
  services.xserver.layout = "us";

  # Disabled and replaced with Pipewire.
  hardware.pulseaudio.enable = false;
  security.rtkit.enable = true;
  services.pipewire = {
    enable = true;
    alsa.enable = true;
    alsa.support32Bit = true;
    pulse.enable = true;
    jack.enable = true;
  };

  programs.zsh.enable = true;
  users.users.gsimmer = {
    isNormalUser = true;
    shell = pkgs.zsh;
    extraGroups = [ "wheel" "networkmanager" ];
  };

  environment.systemPackages = with pkgs; [
    vim
    wget
    firefox
    emacs
    curl
    podman
    tailscale
  ];
  services.flatpak.enable = true;
  xdg.portal.enable = true;
  programs.mtr.enable = true;
  programs.gnupg.agent = {
    enable = true;
    enableSSHSupport = true;
  };

  networking.firewall.enable = false;

  boot.binfmt.emulatedSystems = [ "aarch64-linux" ];
  
  # 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 = "21.05"; # Did you read the comment?

}