# sudo nixos-rebuild switch --flake .#nix-builder --target-host root@192.168.3.118

# 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’).

{ config, pkgs, ... }:

{
  imports = [ # Include the results of the hardware scan.
    ./hardware-configuration.nix
  ];

  # Bootloader.
  boot.loader.grub.enable = true;
  boot.loader.grub.device = "/dev/sda";
  boot.loader.grub.useOSProber = true;

  boot.binfmt.emulatedSystems = [ "aarch64-linux" ];

  networking.hostName = "nix-builder"; # Define your hostname.

  # Enable networking
  networking.networkmanager.enable = true;

  # Set your time zone.
  time.timeZone = "Europe/Berlin";

  # Select internationalisation properties.
  i18n.defaultLocale = "en_US.UTF-8";

  i18n.extraLocaleSettings = {
    LC_ADDRESS = "de_DE.UTF-8";
    LC_IDENTIFICATION = "de_DE.UTF-8";
    LC_MEASUREMENT = "de_DE.UTF-8";
    LC_MONETARY = "de_DE.UTF-8";
    LC_NAME = "de_DE.UTF-8";
    LC_NUMERIC = "de_DE.UTF-8";
    LC_PAPER = "de_DE.UTF-8";
    LC_TELEPHONE = "de_DE.UTF-8";
    LC_TIME = "de_DE.UTF-8";
  };

  # Configure keymap in X11
  services.xserver = {
    xkb.layout = "de";
    xkb.variant = "";
  };

  # Configure console keymap
  console.keyMap = "de";

  # Define a user account. Don't forget to set a password with ‘passwd’.
  users.users.nix = {
    isNormalUser = true;
    description = "Nix";
    extraGroups = [ "networkmanager" "wheel" ];
    packages = with pkgs; [ ];
  };

  nix.settings.trusted-users = [ "@wheel" ];
  nix.settings.experimental-features = [ "nix-command" "flakes" ];

  # Setup binary caches
  nix.settings = {
    substituters =
      [ "https://nix-community.cachix.org" "https://cache.nixos.org/" ];
    trusted-public-keys = [
      "nix-community.cachix.org-1:mB9FSh9qf2dCimDSUo8Zy7bkq5CX+/rkCWyvRCYg3Fs="
    ];
  };

  # optimize store by hardlinking store files
  nix.optimise.automatic = true;
  nix.optimise.dates = [ "03:15" ];

  nix.gc.automatic = true;
  nix.gc.dates = "weekly";
  nix.gc.options = "--delete-older-than 30d";

  # Garbage collect up to 30 GiB when only 5 GiB storage left
  nix.extraOptions = ''
    min-free = ${toString (5 * 1024 * 1024 * 1024)}
    max-free = ${toString (30 * 1024 * 1024 * 1024)}
    min-free-check-interval = 60
  '';

  nixpkgs.config.allowUnfree = true;

  # List packages installed in system profile. To search, run:
  # $ nix search wget
  environment.systemPackages = with pkgs; [ vim htop mc ];

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

  services.ollama = {
    enable = true;
    acceleration = "cuda";
  };

  security.pam.enableSSHAgentAuth = true; # enable sudo logins via ssh

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

  # 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"; # Did you read the comment?

}