{ config, pkgs, ... }:

{
  imports = [
    ./hardware-configuration.nix
    ../server.nix
  ];

  hardware = {
    raspberry-pi."4" = {
      apply-overlays-dtmerge.enable = true;
      audio.enable = false;
      fkms-3d.enable = true;    # VideoCore with 512 MB CMA reservation
      tc358743.enable = true;   # HDMI-to-CSI-2 converter
      xhci.enable = false;
    };
    firmware = with pkgs; [
      firmwareLinuxNonfree
      wireless-regdb
    ];
  };

  networking = {
    hostId = "731d1660";
    firewall = {
      enable = true;
      allowedTCPPorts = [ 8080 ];
      allowedUDPPorts = [ 8080 ];
    };
  };

  systemd.services.ustreamer = {
    enable = true;
    description = "uStreamer service";
    unitConfig = {
      Type = "simple";
    };
    serviceConfig = {
      ExecStartPre = ''${pkgs.v4l-utils}/bin/v4l2-ctl \
        --device=/dev/video0 \
        --fix-edid-checksums \
        --info-edid
      '';
      ExecStart = ''${pkgs.unstable.ustreamer}/bin/ustreamer \
        --device=/dev/video0 \
        --resolution=1280x720 \
        --format=uyvy \
        --encoder=m2m-image \
        --workers=3 \
        --persistent \
        --dv-timings \
        --drop-same-frames=30 \
        --host=0.0.0.0 \
        --port=8080
      '';
    };
    wantedBy = [ "network-online.target" ];
    confinement.mode = "chroot-only";
  };

  environment.systemPackages = with pkgs; [
    git
    neovim
    libraspberrypi
    raspberrypi-eeprom
    v4l-utils
    unstable.ustreamer
  ];

  system.stateVersion = "24.05";
}