{ stdenv, fetchurl, zlib, libX11, libXext, libSM, libICE
, libXfixes, libXt, libXi, libXcursor, libXScrnSaver, libXcomposite, libXdamage, libXtst, libXrandr
, alsaLib, dbus, cups, libexif, ffmpeg, systemd
, freetype, fontconfig, libXft, libXrender, libxcb, expat
, libuuid
, gstreamer, gst-plugins-base, libxml2
, glib, gtk3, pango, gdk-pixbuf, cairo, atk, at-spi2-atk, at-spi2-core, gnome2
, nss, nspr
, patchelf, makeWrapper
, isSnapshot ? false
, proprietaryCodecs ? false, vivaldi-ffmpeg-codecs ? null
, enableWidevine ? false, vivaldi-widevine ? null
}:

let
  branch = if isSnapshot then "snapshot" else "stable";
  vivaldiName = if isSnapshot then "vivaldi-snapshot" else "vivaldi";
in stdenv.mkDerivation rec {
  pname = "vivaldi";
  version = "2.8.1664.40-1";

  src = fetchurl {
    url = "https://downloads.vivaldi.com/${branch}/vivaldi-${branch}_${version}_amd64.deb";
    sha256 = "07v7p3r9yc566xkwhiazd80pj2d6rcvs3xnbnwjambi1rajbs5sx";
  };

  unpackPhase = ''
    ar vx $src
    tar -xvf data.tar.xz
  '';

  nativeBuildInputs = [ patchelf makeWrapper ];

  buildInputs = [
    stdenv.cc.cc stdenv.cc.libc zlib libX11 libXt libXext libSM libICE libxcb
    libXi libXft libXcursor libXfixes libXScrnSaver libXcomposite libXdamage libXtst libXrandr
    atk at-spi2-atk at-spi2-core alsaLib dbus cups gtk3 gdk-pixbuf libexif ffmpeg systemd
    freetype fontconfig libXrender libuuid expat glib nss nspr
    gstreamer libxml2 gst-plugins-base pango cairo gnome2.GConf
  ] ++ stdenv.lib.optional proprietaryCodecs vivaldi-ffmpeg-codecs;

  libPath = stdenv.lib.makeLibraryPath buildInputs
    + stdenv.lib.optionalString (stdenv.is64bit)
      (":" + stdenv.lib.makeSearchPathOutput "lib" "lib64" buildInputs)
    + ":$out/opt/${vivaldiName}/lib";

  buildPhase = ''
    echo "Patching Vivaldi binaries"
    patchelf \
      --set-interpreter "$(cat $NIX_CC/nix-support/dynamic-linker)" \
      --set-rpath "${libPath}" \
      opt/${vivaldiName}/vivaldi-bin
  '' + stdenv.lib.optionalString proprietaryCodecs ''
    sed -i '/^if \[ "$VIVALDI_FFMPEG_FOUND/i \
      VIVALDI_FFMPEG_FOUND=YES\nCACHED_FFMPEG=${vivaldi-ffmpeg-codecs}/lib/libffmpeg.so' opt/${vivaldiName}/${vivaldiName}
  '' + ''
    echo "Finished patching Vivaldi binaries"
  '';

  dontPatchELF = true;
  dontStrip    = true;

  installPhase = ''
    mkdir -p "$out"
    cp -r opt "$out"
    mkdir "$out/bin"
    ln -s "$out/opt/${vivaldiName}/${vivaldiName}" "$out/bin/vivaldi"
    mkdir -p "$out/share"
    cp -r usr/share/{applications,xfce4} "$out"/share
    substituteInPlace "$out"/share/applications/*.desktop \
      --replace /usr/bin/${vivaldiName} "$out"/bin/vivaldi
    substituteInPlace "$out"/share/applications/*.desktop \
      --replace vivaldi-stable vivaldi
    local d
    for d in 16 22 24 32 48 64 128 256; do
      mkdir -p "$out"/share/icons/hicolor/''${d}x''${d}/apps
      ln -s \
        "$out"/opt/${vivaldiName}/product_logo_''${d}.png \
        "$out"/share/icons/hicolor/''${d}x''${d}/apps/vivaldi.png
    done
    wrapProgram "$out/bin/vivaldi" \
      --suffix XDG_DATA_DIRS : ${gtk3}/share/gsettings-schemas/${gtk3.name}/ \
      ${stdenv.lib.optionalString enableWidevine "--suffix LD_LIBRARY_PATH : ${libPath}"}
  '' + stdenv.lib.optionalString enableWidevine ''
    rm $out/opt/${vivaldiName}/libwidevinecdm.so
    ln -s ${vivaldi-widevine}/lib/libwidevinecdm.so $out/opt/${vivaldiName}/libwidevinecdm.so
  '';

  meta = with stdenv.lib; {
    description = "A Browser for our Friends, powerful and personal";
    homepage    = "https://vivaldi.com";
    license     = licenses.unfree;
    maintainers = with maintainers; [ otwieracz nequissimus ];
    platforms   = [ "x86_64-linux" ];
  };
}