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

let
  # Siril's Python plugins (sirilpy) run in a venv that pip-installs foreign
  # manylinux wheels (numpy, GraXpert deps, ...). Those .so files need
  # libstdc++ at runtime. nix-ld does NOT cover this: it only handles the
  # initial exec of a foreign binary, but here a *native* nixpkgs python
  # dlopen()s the foreign wheel. So we put the libs on LD_LIBRARY_PATH, which
  # the python subprocess inherits from the Siril process.
  sirilWithPlugins = pkgs.symlinkJoin {
    name = "siril-with-plugins";
    paths = [ pkgs.siril ];
    nativeBuildInputs = [ pkgs.makeWrapper ];
    postBuild = ''
      wrapProgram $out/bin/siril \
        --prefix LD_LIBRARY_PATH : ${lib.makeLibraryPath [ pkgs.stdenv.cc.cc.lib pkgs.zlib ]}
    '';
  };
in
{
  # install stellarium for target finding and siril for stacking
  environment.systemPackages = with pkgs; [
    stellarium
    sirilWithPlugins
  ];

  # StarNet++ has no nixpkgs package. Download the StarNet v2 ORT CLI build
  # (starnet2_linux_*_ORT_x64_cli) from https://www.starnetastro.com/download/
  # and unzip it to ~/.local/share/siril/starnet/. Then in Siril set
  #   Preferences -> Miscellaneous -> StarNet executable
  # to the extracted ./starnet2 binary.
  #
  # The binary is a generic dynamically-linked ELF, so NixOS needs nix-ld to
  # run it. Its own opencv/onnxruntime libs are found via the bundled ./lib.
  programs.nix-ld.enable = true;
  programs.nix-ld.libraries = with pkgs; [
    stdenv.cc.cc.lib   # libstdc++ / libgcc_s
    zlib
  ];
}