configuration.nix

{ inputs
, outputs
, lib
, config
, pkgs
, ...
}: {
  imports = [
    ./hardware-configuration.nix
  ];

  nixpkgs = {
    overlays = [
      outputs.overlays.additions
      outputs.overlays.modifications
      outputs.overlays.unstable-packages
    ];

    config = {
      allowUnfree = true;
    };
  };

  # This will add each flake input as a registry
  # To make nix3 commands consistent with the flake
  nix.registry = (lib.mapAttrs (_: flake: { inherit flake; })) ((lib.filterAttrs (_: lib.isType "flake")) inputs);

  # Weekly garbage collection
  nix.gc = {
    automatic = true;
    dates = "weekly";
  };

  # This will additionally add inputs to the system's legacy channels
  # Making legacy nix commands consistent as well, awesome!
  nix.nixPath = [ "/etc/nix/path" ];
  environment.etc =
    lib.mapAttrs'
      (name: value: {
        name = "nix/path/${name}";
        value.source = value.flake;
      })
      config.nix.registry;

  nix.settings = {
    experimental-features = "nix-command flakes";
    auto-optimise-store = true;
  };

  environment.systemPackages = with pkgs; [
    vim
    wget
  ];

  programs = {
    firefox.enable = true;
    direnv = {
      enable = true;
      nix-direnv.enable = true;
    };
    gnupg.agent = {
      enable = true;
      enableSSHSupport = true;
    };
  };


  # Bootloader.
  boot.loader.systemd-boot.enable = true;
  boot.loader.systemd-boot.configurationLimit = 10;
  boot.loader.efi.canTouchEfiVariables = true;

  # Bluetooth
  hardware.bluetooth.enable = true;
  hardware.bluetooth.powerOnBoot = true;

  networking.hostName = "nixos";
  # 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 X11. Switch to Hyprland later
  services.xserver = {
    enable = true;
    xkb.layout = "us";
    xkb.variant = "";
  };
  services.displayManager.sddm.enable = true;
  services.desktopManager.plasma6.enable = true;

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

  # Enable sound with pipewire.
  services.pulseaudio.enable = false;
  security.rtkit.enable = true;
  services.pipewire = {
    enable = true;
    alsa.enable = true;
    alsa.support32Bit = true;
    pulse.enable = true;
  };

  # Virtualisation
  #virtualisation.libvirtd.enable = true;
  virtualisation.virtualbox.host.enable = true;
  users.extraGroups.vboxusers.members = [ "klucas" ];
  virtualisation.virtualbox.host.enableExtensionPack = true;
  virtualisation.virtualbox.guest.enable = true;
  virtualisation.virtualbox.guest.dragAndDrop = true;

  # User account
  users.users.klucas = {
    isNormalUser = true;
    description = "Kevin Lucas";
    extraGroups = [ "networkmanager" "wheel" "vboxusers" "vboxsf" ];
    shell = pkgs.zsh;
  };
  programs.zsh.enable = true;

  # TODO: Move to a separate module
  fonts.packages = with pkgs; [
    source-sans
    source-serif
    nerd-fonts.sauce-code-pro
    nerd-fonts.fira-code
    nerd-fonts.droid-sans-mono
  ];

  fonts.fontconfig = {
    enable = true;
    defaultFonts = {
      serif = [ "Source Serif 4" ];
      sansSerif = [ "Source Sans 3" ];
      monospace = [ "Fira Code" ];
    };
  };

  system.stateVersion = "23.11";
}