{ lib
, formats
, stdenvNoCC
, fetchFromGitHub
, qtgraphicaleffects
  /* An example of how you can override the background with a NixOS wallpaper
  *
  *  environment.systemPackages = [
  *    (pkgs.elegant-sddm.override {
  *      themeConfig.General = {
           background = "${pkgs.nixos-artwork.wallpapers.simple-dark-gray-bottom.gnomeFilePath}";
  *      };
  *    })
  *  ];
  */
, themeConfig ? null
}:

let
  user-cfg = (formats.ini { }).generate "theme.conf.user" themeConfig;
in

stdenvNoCC.mkDerivation {
  pname = "elegant-sddm";
  version = "unstable-2024-02-08";

  src = fetchFromGitHub {
    owner = "surajmandalcell";
    repo = "Elegant-sddm";
    rev = "3102e880f46a1b72c929d13cd0a3fb64f973952a";
    hash = "sha256-yn0fTYsdZZSOcaYlPCn8BUIWeFIKcTI1oioTWqjYunQ=";
  };

  propagatedBuildInputs = [
    qtgraphicaleffects
  ];

  dontWrapQtApps = true;

  installPhase = ''
    runHook preInstall

    mkdir -p "$out/share/sddm/themes"
    cp -r Elegant/ "$out/share/sddm/themes/Elegant"
  '' + (lib.optionalString (lib.isAttrs themeConfig) ''
    ln -sf ${user-cfg} $out/share/sddm/themes/Elegant/theme.conf.user
  '') + ''
    runHook postInstall
  '';

  postFixup = ''
    mkdir -p $out/nix-support

    echo ${qtgraphicaleffects} >> $out/nix-support/propagated-user-env-packages
  '';

  meta = with lib; {
    description = "Sleek and stylish SDDM theme crafted in QML";
    homepage = "https://github.com/surajmandalcell/Elegant-sddm";
    license = licenses.gpl3;
    maintainers = with maintainers; [ GaetanLepage ];
  };
}