{ config, pkgs, lib, ... }:

{
  imports =
    [
      ./hardware.nix
    ];

  # Configure Nix
  nix.package = pkgs.lixPackageSets.stable.lix;
  nixpkgs.config.allowUnfree = false;
  nix.settings.experimental-features = [ "nix-command" "flakes" ];
  nix.settings.connect-timeout = 5;
  nix.settings.fallback = true;

  # Binary Cache and Substitutes
  #nix.settings.substituters = [
  #  "ssh://ssh-nix@pkpnafs"
  #];
  #nix.settings.trusted-substituters = [
  #  "ssh://ssh-nix@pkpnafs"
  #];
  nix.settings.trusted-public-keys = [
    "cache-pkpnafs:guOMrEa3XPWnRihJtf7KraRRFLHlKvd1bmWbk7BZEow="
    "cache-senfnvp:8fiqd165A80WZD8gLgzMjiQk6/8AdaANZqERktzIXkU="
    "cache-Ohybke:0D+ovjv+/WqRX7hQ2qJzBbpE8NEBGtzmWQDpmlszcHQ="
  ];
  nix.extraOptions = ''
    secret-key-files = /root/secrets/cache-LoyAdjo.sec
    builders-use-substitutes = true
  '';
  #nix.sshServe.enable = true;
  #nix.sshServe.keys = [
  #];

  # Nix Builders
  nix.distributedBuilds = true;
  nix.buildMachines = [
    {
      hostName = "pkpnafs";
      sshUser = "nix-builder";
      system = "x86_64-linux";
      systems = [ "x86_64-linux" "i686-linux" ];
      supportedFeatures = [
        "kvm"
        "big-parallel"
      ];
      maxJobs = 1;
    }
  ];

  # Nix Security
  nix.settings.trusted-users=[ "remotebuild" ];
  nixpkgs.config.allowUnfreePredicate = pkg: builtins.elem (lib.getName pkg) [
    "ungoogled-chromium"
    "ungoogled-chromium-unwrapped"
    "widevine-cdm"
    "veracrypt"
    "castlabs-electron"
    "steam"
    "steam-unwrapped"
  ];

  # Bootloader.
  boot.loader.systemd-boot.enable = true;
  boot.loader.efi.canTouchEfiVariables = true;

  networking.hostName = "LoyAdjo";

  # Wireless
  networking.networkmanager.enable = true;
  hardware.bluetooth.enable = true; # enables support for Bluetooth
  hardware.bluetooth.powerOnBoot = true; # powers up the default Bluetooth controller on boot

  # Locale
  time.timeZone = "Europe/Berlin";
  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";
  };

  # GUI
  services.xserver.enable = true;
  services.displayManager.sddm.enable = true;
  services.desktopManager.plasma6.enable = true;

  # Input
  services.xserver.xkb.layout = "de";
  services.xserver.xkb.variant = "";
  console.keyMap = "de";
  services.numen = {
    enable = true;
    autoStart = true;
    phrasesPkg = pkgs.kb-one.numen-phrases.override {
      customWakeWords-en = [ "enable" "voice" "compute" ];
      customWakeWords-de = [ "sprach" "schrift" "aktiv" ];
    };
    phrases = [
      "${config.services.numen.phrasesPkg}/phrases/en-inactive/hibernate.phrases"
    ];
    dotoolXkbLayout = "de";
  };

  # Security
  security.rtkit.enable = true; # For Sound
  security.pam.services = {
    login.u2fAuth = true;
    sudo.u2fAuth = true;
  };
  
  # Output
  services.pulseaudio.enable = false;
  services.pipewire = {
    enable = true;
    alsa.enable = true;
    alsa.support32Bit = true;
    pulse.enable = true;
  };
  services.printing.enable = true;

  # Users
  users.users.kb = { # Managed by Homemanager
    isNormalUser = true;
    description = "kB";
    extraGroups = [ "networkmanager" "wheel" "input" ];
  };
  users.users.games = { # Managed by Homemanager
    isNormalUser = true;
    description = "games";
    extraGroups = [ "networkmanager" "input" ];
  };
  users.users.remotebuild = {
    isNormalUser = true;
    openssh.authorizedKeys.keys = [
      "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIIuvGIdO1nwuzq3YrjpxH84rpGhquNvRKz1SSPwKUsth kb @ Rubtrm"
      "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIGRlk8FEIN7P81SRVEkP1wjlBjsiUGcBcqzSbHVGB0sF root @ Ohybke"
      "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIAl0qiBLwbdSAMfnZCcpG23LgkhlV3Bko3U17oV3m18A root @ HyperC"
    ];
  };


  # Default Editor
  programs.vim.enable = true;
  programs.vim.defaultEditor = true;

  # Steam
  programs.steam.enable = true;
  programs.steam.remotePlay.openFirewall = true;
  hardware.steam-hardware.enable = true;


  # Languagetool Spellchecking Server  
  services.languagetool = {
    enable = true;
    allowOrigin = "*";
  };

  # SSH
  programs.ssh.startAgent = true;
  services.openssh = {
    enable = true;
    settings.PasswordAuthentication = false;
    settings.KbdInteractiveAuthentication = false;
    ports = [ 7325 ];
    openFirewall = true;
  };


  # System Packages
  environment.systemPackages = with pkgs; [ # To search, run: $ nix search wget
    vim
    git
    tree
    openvr
    sops
  ];

  system.stateVersion = "24.05"; # NEVER Change this!
}