{ lib
, stdenv
, fetchFromGitHub
, gitUpdater
, gdk-pixbuf
, gnome-themes-extra
, gtk-engine-murrine
, jdupes
, librsvg
, sassc
, which
, themeVariants ? [] # default: blue
, colorVariants ? [] # default: all
, tweaks ? []
}:

let
  pname = "qogir-theme";

in
lib.checkListOfEnum "${pname}: theme variants" [ "default" "manjaro" "ubuntu" "all" ] themeVariants
lib.checkListOfEnum "${pname}: color variants" [ "standard" "light" "dark" ] colorVariants
lib.checkListOfEnum "${pname}: tweaks" [ "image" "square" "round" ] tweaks

stdenv.mkDerivation rec {
  inherit pname;
  version = "2022-10-16";

  src = fetchFromGitHub {
    owner = "vinceliuice";
    repo = pname;
    rev = version;
    sha256 = "S9pLwkgWdnk1AezHE2D4vpV+JSmRW3vr6G5qYoup1ko=";
  };

  nativeBuildInputs = [
    jdupes
    sassc
    which
  ];

  buildInputs = [
    gdk-pixbuf # pixbuf engine for Gtk2
    gnome-themes-extra # adwaita engine for Gtk2
    librsvg # pixbuf loader for svg
  ];

  propagatedUserEnvPkgs = [
    gtk-engine-murrine # murrine engine for Gtk2
  ];

  postPatch = ''
    patchShebangs install.sh clean-old-theme.sh
  '';

  installPhase = ''
    runHook preInstall

    mkdir -p $out/share/themes

    name= HOME="$TMPDIR" ./install.sh \
      ${lib.optionalString (themeVariants != []) "--theme " + builtins.toString themeVariants} \
      ${lib.optionalString (colorVariants != []) "--color " + builtins.toString colorVariants} \
      ${lib.optionalString (tweaks != []) "--tweaks " + builtins.toString tweaks} \
      --dest $out/share/themes

    mkdir -p $out/share/doc/${pname}
    cp -a src/firefox $out/share/doc/${pname}

    rm $out/share/themes/*/{AUTHORS,COPYING}

    jdupes --quiet --link-soft --recurse $out/share

    runHook postInstall
  '';

  passthru.updateScript = gitUpdater { };

  meta = with lib; {
    description = "Flat Design theme for GTK based desktop environments";
    homepage = "https://vinceliuice.github.io/Qogir-theme";
    license = licenses.gpl3Only;
    platforms = platforms.unix;
    maintainers = [ maintainers.romildo ];
  };
}