{ 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 (with pkgs; [
          stdenv.cc.cc.lib   # libstdc++ / libgcc_s / libgomp  (numpy etc.)
          zlib
          zstd               # libzstd.so.1                     (PyQt6)
          libGL              # libGL.so.1                       (PyQt6)
          # PyQt6 (VeraLux) — Qt bundles xcb support so it needs these even
          # on Wayland; libxkbcommon is the keymap lib used by Wayland too.
          glib
          fontconfig
          freetype
          dbus
          libxkbcommon
          # Qt platform plugins: the wayland plugin (libqwayland.so) needs the
          # wayland client libs; the xcb fallback needs libxcb-cursor.so.0.
          wayland            # libwayland-client/cursor/egl       (wayland plugin)
          libxcb-cursor      # libxcb-cursor.so.0                 (xcb plugin)
          libx11
          libxcb
          libxcb-util
          libxcb-wm
          libxcb-image
          libxcb-keysyms
          libxcb-render-util
        ])}
    '';
  };
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
  ];
}