{ lib
, stdenv
, fetchurl
, coreutils
, gdk-pixbuf
, gdk-pixbuf-xlib
, gettext
, gle
, gtk3
, intltool
, libGL
, libGLU
, libX11
, libXext
, libXft
, libXi
, libXinerama
, libXrandr
, libXt
, libXxf86vm
, libxml2
, makeWrapper
, pam
, perlPackages
, xorg
, pkg-config
, systemd
, forceInstallAllHacks ? true
, withSystemd ? lib.meta.availableOn stdenv.hostPlatform systemd
, nixosTests
, substituteAll
, wrapperPrefix ? "/run/wrappers/bin"
}:

stdenv.mkDerivation (finalAttrs: {
  pname = "xscreensaver";
  version = "6.09";

  src = fetchurl {
    url = "https://www.jwz.org/xscreensaver/xscreensaver-${finalAttrs.version}.tar.gz";
    hash = "sha256-9GZ3Ba24zEP9LzlzqIobVLFvIBkK/pOyHiIfL1cyCwU=";
  };

  outputs = [ "out" "man" ];

  nativeBuildInputs = [
    intltool
    makeWrapper
    pkg-config
  ];

  buildInputs = [
    gdk-pixbuf
    gdk-pixbuf-xlib
    gettext
    gle
    gtk3
    libGL
    libGLU
    libX11
    libXext
    libXft
    libXi
    libXinerama
    libXrandr
    libXt
    libXxf86vm
    libxml2
    pam
    perlPackages.LWPProtocolHttps
    perlPackages.MozillaCA
    perlPackages.perl
  ]
  ++ lib.optionals withSystemd [ systemd ];

  postPatch = ''
    pushd hacks
    patchShebangs check-configs.pl munge-ad.pl xml2man.pl
    popd
  '';

  patches = [
    (substituteAll {
      src = ./xscreensaver-wrapper-prefix.patch;
      inherit wrapperPrefix;
    })
  ];

  preConfigure = ''
    # Fix installation paths for GTK resources.
    sed -e 's%@GTK_DATADIR@%@datadir@% ; s%@PO_DATADIR@%@datadir@%' \
      -i driver/Makefile.in po/Makefile.in.in
  '';

  configureFlags = [
    "--with-app-defaults=${placeholder "out"}/share/xscreensaver/app-defaults"
  ];

  # "marbling" has NEON code that mixes signed and unsigned vector types
  env.NIX_CFLAGS_COMPILE = lib.optionalString stdenv.hostPlatform.isAarch "-flax-vector-conversions";

  postInstall = ''
    for bin in $out/bin/*; do
      wrapProgram "$bin" \
        --prefix PATH : "$out/libexec/xscreensaver" \
        --prefix PATH : "${lib.makeBinPath [ coreutils perlPackages.perl xorg.appres ]}" \
        --prefix PERL5LIB ':' $PERL5LIB
    done
  ''
  + lib.optionalString forceInstallAllHacks ''
    make -j$NIX_BUILD_CORES -C hacks/glx dnalogo
    cat hacks/Makefile.in \
      | grep -E '([a-z0-9]+):[[:space:]]*\1[.]o' | cut -d : -f 1 | xargs make -j$NIX_BUILD_CORES -C hacks
    cat hacks/glx/Makefile.in \
      | grep -E '([a-z0-9]+):[[:space:]]*\1[.]o' | cut -d : -f 1 | xargs make -j$NIX_BUILD_CORES -C hacks/glx
    cp -f $(find hacks -type f -perm -111 "!" -name "*.*" ) "$out/libexec/xscreensaver"
  '';

  passthru.tests = {
    xscreensaver = nixosTests.xscreensaver;
  };

  meta = {
    homepage = "https://www.jwz.org/xscreensaver/";
    description = "Set of screensavers";
    downloadPage = "https://www.jwz.org/xscreensaver/download.html";
    license = lib.licenses.mit;
    maintainers = with lib.maintainers; [ raskin AndersonTorres ];
    platforms = lib.platforms.unix;
  };
})
