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

let
  SSID = "mywifi";
  SSIDpassword = "mypassword";
  interface = "wlan0";
  hostname = "nixpi";
in {
  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";
  };

 console.keyMap = "de";

  services.xserver = {
    layout = "de";
    xkbVariant = "";
  };


  boot = {
    kernelPackages = pkgs.linuxKernel.packages.linux_rpi4;
    initrd.availableKernelModules = [ "xhci_pci" "usbhid" "usb_storage" ];
    loader = {
      grub.enable = false;
      generic-extlinux-compatible.enable = true;
    };
  };

  fileSystems = {
    "/" = {
      device = "/dev/disk/by-label/NIXOS_SD";
      fsType = "ext4";
      options = [ "noatime" ];
    };
  };

  networking = {
    hostName = hostname;
    wireless = {
      enable = true;
      networks."${SSID}".psk = SSIDpassword;
      interfaces = [ interface ];
    };
  };

  environment.systemPackages = with pkgs; [ vim ];

  services.openssh.enable = true;

  programs.xonsh.enable = true;
  users = {
    mutableUsers = false;
    users."pi" = {
      shell = pkgs.xonsh;
      isNormalUser = true;
      hashedPassword = "$y$j9T$ODBtPwWjIx50Bjhctw9kW/$jhfsHaAyh8zOXBV7cCK9l2M0yWyE3VLiL0h55XXV5J2";
      extraGroups = [ "wheel" ];
    };
  };

  hardware.enableRedistributableFirmware = true;
  system.stateVersion = "23.11";

  environment.systemPackages = with pkgs; [
    wget
    hyfetch
    usbutils
    pciutils
    git
    btop
    git-lfs
    lm_sensors
    file
    raspberrypi-eeprom
  ];

  nix.settings.experimental-features = [ "nix-command" "flakes" ];
  nixpkgs.config.allowUnfree = true;

  boot.tmp.cleanOnBoot = true;
  zramSwap.enable = true;
}