# Edit this configuration file to define what should be installed on
# your system.  Help is available in the configuration.nix(5) man page
# and in the NixOS manual (accessible by running ‘nixos-help’).

{ inputs, config, pkgs, lib, ... }:
let
  nvidia-offload = pkgs.writeShellScriptBin "nvidia-offload" ''
    export __NV_PRIME_RENDER_OFFLOAD=1
    export __NV_PRIME_RENDER_OFFLOAD_PROVIDER=NVIDIA-G0
    export __GLX_VENDOR_LIBRARY_NAME=nvidia
    export __VK_LAYER_NV_optimus=NVIDIA_only
    exec "$@"
  '';
in {
  imports = [
    # Include the results of the hardware scan.
    ./hardware-configuration.nix
    # <nixos-hardware/lenovo/legion/15ich>
  ];

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

  # do not protect the kernel image to allow hibernation
  security.protectKernelImage = lib.mkForce false;

  networking.hostName = "dregil"; # Define your hostname.
  # Pick only one of the below networking options.
  # networking.wireless.enable = true;  # Enables wireless support via wpa_supplicant.
  networking.networkmanager.enable =
    true; # Easiest to use and most distros use this by default.

  # Configure network proxy if necessary
  # networking.proxy.default = "http://user:password@proxy:port/";
  # networking.proxy.noProxy = "127.0.0.1,localhost,internal.domain";

  i18n = {
    extraLocaleSettings = { TIME_STYLE = "iso"; };
    supportedLocales = [ "C.UTF-8" "en_US.UTF-8" "de_DE.UTF8" ];
  };

  console = {
    font = "Lat2-Terminus16";
    #useXkbConfig = true; # use xkbOptions in tty.
    keyMap = "dvorak";
  };

  # Enable the X11 windowing system.
  services.xserver = {
    enable = true;
    exportConfiguration = true;

    # Configure keymap in X11
    layout = "us";

    xkbOptions = "terminate:ctrl_alt_bksp,caps:escape,compose:ralt";

    videoDrivers = [ "nvidia" ]; # "modesetting" ];

    displayManager.lightdm = {
      enable = true;
      greeters.slick.enable = true;
    };

    desktopManager.xfce.enable = true;
    desktopManager.gnome.enable = true;

    # Enable touchpad support (enabled default in most desktopManager).
    libinput = {
      enable = true;
      touchpad.disableWhileTyping = true;
      touchpad.naturalScrolling = true;
      mouse.naturalScrolling =
        config.services.xserver.libinput.touchpad.naturalScrolling;
    };
  };

  fonts = {
    enableDefaultFonts = true;
    fonts = with pkgs; [
      corefonts
      noto-fonts
      noto-fonts-emoji
      fira-code
      fira-code-symbols
      nerdfonts
    ];
  };

  # Enable CUPS to print documents.
  # services.printing.enable = true;

  # Enable sound.
  sound.enable = true;
  hardware.pulseaudio.enable = true;

  # Define a user account. Don't forget to set a password with ‘passwd’.
  users.users.alex = {
    isNormalUser = true;
    extraGroups = [
      "wheel" # Enable ‘sudo’ for the user.
      "input"
    ];
  };

  # List packages installed in system profile. To search, run:
  # $ nix search wget
  environment.systemPackages = with pkgs; [
    wget
    ripgrep
    git
    nvidia-offload
    pinentry
  ];

  # adjust channels to nixpkgs used on this system via this flake
  environment.etc."nix/inputs/nixpkgs".source = inputs.nixpkgs-unstable.outPath;
  nix.nixPath = [ "nixpkgs=${inputs.nixpkgs-unstable}" ];

  # Some programs need SUID wrappers, can be configured further or are
  # started in user sessions.
  # programs.mtr.enable = true;
  programs.gnupg.agent = {
    enable = true;
    enableSSHSupport = true;
  };

  programs.neovim = { enable = true; };

  programs.steam = { enable = true; };

  # List services that you want to enable:

  # Enable the OpenSSH daemon.
  services.openssh.enable = true;

  # Open ports in the firewall.
  # networking.firewall.allowedTCPPorts = [ ... ];
  # networking.firewall.allowedUDPPorts = [ ... ];
  # Or disable the firewall altogether.
  # networking.firewall.enable = false;

  # Copy the NixOS configuration file and link it from the resulting system
  # (/run/current-system/configuration.nix). This is useful in case you
  # accidentally delete configuration.nix.
  # system.copySystemConfiguration = true;

  system.nixos.tags = [ "HiDPI" "nvidia-only" ];

  # 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 = "22.11"; # Did you read the comment?

}