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

{
  boot.initrd.availableKernelModules = [ "usbhid" ];
  boot.initrd.kernelModules = [ ];
  boot.kernelModules = [ ];
  boot.extraModulePackages = [ ];

  fileSystems."/" = {
    device = "/dev/disk/by-label/NIXOS_SD";
    fsType = "ext4";
  };

  fileSystems."/boot/firmware" = {
    device = "/dev/disk/by-label/FIRMWARE";
    fsType = "vfat";
  };

  swapDevices = [ ];

  hardware.enableRedistributableFirmware = true;
  #networking.wireless.enable = true;
  hardware.deviceTree.enable = false;
  powerManagement.cpuFreqGovernor = lib.mkDefault "performance";

  boot = {
    loader = {
      grub.enable = false;
      generic-extlinux-compatible.enable = lib.mkDefault true;
      raspberryPi = {
        enable = true;
        version = 4;
        uboot.enable = true;
        firmwareConfig = ''
          gpu_mem=192
          dtparam=audio=on
        '';
      };
    };
    kernelPackages = pkgs.linuxPackages_latest;
    # No ZFS on latest kernel:
    supportedFilesystems = lib.mkForce [ "vfat" "ext4" ];

    tmpOnTmpfs = true;
  };
  nixpkgs.config.packageOverrides = pkgs: {
    makeModulesClosure = x:
      # prevent kernel install fail due to missing modules
      pkgs.makeModulesClosure (x // { allowMissing = true; });
  };
  sdImage = {
    compressImage = false;
    imageBaseName = config.networking.hostName;
    firmwareSize = 512;
  };

  c3d2 = {
    isInHq = false;
    hq.statistics.enable = true;
    pi-sensors = if true then [] else [ {
      type = "dht22";
      pin = 17;
      location = "Schrank";
    } {
      type = "dht22";
      pin = 23;
      location = "Aussen";
    } ];

    # unless you automate walking up to the roof, do never enable
    # automatic updates for this machine!
    autoUpdate = lib.mkForce false;
  };

  nix = {
    buildCores = 4;
    maxJobs = 2;
  };
  sops.age.sshKeyPaths = [ "/etc/ssh/ssh_host_ed25519_key" ];

  networking = {
    hostName = "radiobert"; # Define your hostname.
    useDHCP = false;
    interfaces.eth0.ipv4.addresses = [{
      address = config.c3d2.hosts."${config.networking.hostName}".ip4;
      prefixLength = zentralwerk.lib.config.site.net.serv.subnet4Len;
    }];
    defaultGateway = "172.20.73.1";
    firewall.enable = false;
    nameservers = [ "172.20.73.8" "9.9.9.9" ];
  };

  environment.systemPackages = with pkgs; [
    libraspberrypi
    raspberrypi-eeprom
    vim
    wget
  ];

  programs.tmux.enable = true;

  # Do not log to flash:
  services.journald.extraConfig = ''
    Storage=volatile
  '';

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

  # Allow access to USB
  services.udev.extraRules = ''
    SUBSYSTEM=="usb", MODE:="0666"
  '';

  # 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?
}