{ stdenv, fetchurl, makeDesktopItem
, jre, libX11, libXext, libXcursor, libXrandr, libXxf86vm
, openjdk
, libGLU_combined, openal
, useAlsa ? false, alsaOss ? null }:
with stdenv.lib;

assert useAlsa -> alsaOss != null;

let
  desktopItem = makeDesktopItem {
    name = "atlauncher";
    exec = "atlauncher";
    icon = "atlauncher";
    comment = "Free launcher for Minecraft that allows you to download modpacks.";
    desktopName = "ATLauncher";
    genericName = "atlauncher";
    categories = "Game;";
  };

in stdenv.mkDerivation {
  name = "atlauncher-3.2.3.10";

  src = fetchurl {
    url = "https://download.nodecdn.net/containers/atl/ATLauncher.jar";
    sha256 = "0b5xi7jgydqrpz8dqgfbzrq4ijvl0269pci9qj4a6k5xkya45y1a";
  };

  phases = "installPhase";

  installPhase = ''
    set -x
    mkdir -pv $out/bin
    cp -v $src $out/ATLauncher.jar

    cat > $out/bin/atlauncher << EOF
    #!${stdenv.shell}

    export LD_LIBRARY_PATH=\$LD_LIBRARY_PATH:${makeLibraryPath [ libX11 libXext libXcursor libXrandr libXxf86vm libGLU_combined openal ]}
    ${if useAlsa then "${alsaOss}/bin/aoss" else "" } \
    ${jre}/bin/java -jar $out/ATLauncher.jar --working-dir "${XDG_DATA_HOME:-$HOME/.local/share}/atlauncher"
    EOF

    chmod +x $out/bin/atlauncher

    mkdir -p $out/share/applications
    ln -s ${desktopItem}/share/applications/* $out/share/applications/

    ${openjdk}/bin/jar xf $out/ATLauncher.jar assets/image/Icon.png
    install -D assets/image/Icon.png $out/share/icons/hicolor/32x32/apps/atlauncher.png
  '';

  meta = {
      description = "Free launcher for Minecraft that allows you to download modpacks.";
      homepage = http://atlauncher.com;
      maintainers = with stdenv.lib.maintainers; [ tenten8401 ];
      license = stdenv.lib.licenses.gnuGpl3;
  };
}