{ config, lib, pkgs, ... }:
let
  cfg = config.hardware.az-raspi4-base;
in
{
  options = {
    hardware.az-raspi4-base.enable = lib.mkEnableOption "Enable the base config for a Raspberry Pi 4.";
  };

  config = lib.mkIf cfg.enable {
    boot = {
      supportedFilesystems = lib.mkForce [ "f2fs" "ntfs" "cifs" "ext4" "vfat" "nfs" "nfs4" ];
    };
    fileSystems = {
      "/" = {
        device = "/dev/disk/by-label/NIXOS_SD";
        fsType = "ext4";
        options = [ "noatime" ];
      };
    };

    boot = {
      initrd.availableKernelModules = [
        "usbhid"
        "usb_storage"
        "vc4"
        "pcie_brcmstb" # required for the pcie bus to work
        "reset-raspberrypi" # required for vl805 firmware to load
      ];

      loader = {
        grub.enable = false;
        generic-extlinux-compatible.enable = true;
      };
    };
    boot.extraModulePackages = [ ];
    boot.kernelParams = [ ];

    hardware.enableRedistributableFirmware = true;
    hardware.pulseaudio.enable = true;

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

    environment.shellAliases = {
      raspi-cpu = ''
        sudo vcgencmd get_throttled && sudo vcgencmd measure_temp
      '';
      raspi-firmware-update = ''
        sudo mkdir -p /mnt/firmware && \
        sudo mount /dev/disk/by-label/FIRMWARE /mnt/firmware && \
        BOOTFS=/mnt/firmware FIRMWARE_RELEASE_STATUS=stable sudo -E rpi-eeprom-update -d -a && \
        sudo umount /mnt/firmware
      '';
    };
  };
}