{ stdenv, lib, fetchFromGitHub, fetchurl, jdk, ant
, libusb, libusb1, unzip, zlib, ncurses, readline
, withGui ? false, gtk2 ? null, withTeensyduino ? false
  /* Packages needed for Teensyduino */
, upx, fontconfig, xorg, gcc
, atk, glib, pango, gdk_pixbuf, libpng12, expat, freetype,
}:

assert withGui -> gtk2 != null;
assert withTeensyduino -> withGui;

# TODO: Teensyduino is disabled for i686-linux due to an indefinite hang in the
# xdotool script; the cause of this hang is not yet known.
# TODO: There is a fair chance that Teensyduino works with arm-linux, but it
# has not yet been tested.
if withTeensyduino && (stdenv.hostPlatform.system != "x86_64-linux") then throw
  "Teensyduino is only supported on x86_64-linux at this time (patches welcome)."
else
let
  externalDownloads = import ./downloads.nix {
    inherit fetchurl;
    inherit (lib) optionalAttrs;
    inherit (stdenv.hostPlatform) system;
  };
  # Some .so-files are later copied from .jar-s to $HOME, so patch them beforehand
  patchelfInJars =
       lib.optional (stdenv.hostPlatform.system == "x86_64-linux") {jar = "share/arduino/lib/jssc-2.8.0-arduino1.jar"; file = "libs/linux/libjSSC-2.8_x86_64.so";}
    ++ lib.optional (stdenv.hostPlatform.system == "i686-linux") {jar = "share/arduino/lib/jssc-2.8.0-arduino1.jar"; file = "libs/linux/libjSSC-2.8_x86.so";}
  ;
  # abiVersion 6 is default, but we need 5 for `avrdude_bin` executable
  ncurses5 = ncurses.override { abiVersion = "5"; };

  teensy_libpath = stdenv.lib.makeLibraryPath [
    atk
    expat
    fontconfig
    freetype
    gcc.cc.lib
    gdk_pixbuf
    glib
    gtk2
    libpng12
    libusb
    pango
    xorg.libSM
    xorg.libX11
    xorg.libXext
    xorg.libXft
    xorg.libXinerama
    zlib
  ];
  teensy_architecture =
      lib.optionalString (stdenv.hostPlatform.system == "x86_64-linux") "linux64"
      + lib.optionalString (stdenv.hostPlatform.system == "i686-linux") "linux32"
      + lib.optionalString (stdenv.hostPlatform.system == "arm-linux") "linuxarm";

  flavor = (if withTeensyduino then "teensyduino" else "arduino")
             + stdenv.lib.optionalString (!withGui) "-core";
in
stdenv.mkDerivation rec {
  version = "1.8.5";
  name = "${flavor}-${version}";

  src = fetchFromGitHub {
    owner = "arduino";
    repo = "Arduino";
    rev = "${version}";
    sha256 = "0ww72qfk7fyvprz15lc80i1axfdacb5fij4h5j5pakrg76mng2c3";
  };

  teensyduino_version = "145";
  teensyduino_src = fetchurl {
    url = "https://www.pjrc.com/teensy/td_${teensyduino_version}/TeensyduinoInstall.${teensy_architecture}";
    sha256 =
      lib.optionalString ("${teensy_architecture}" == "linux64")
        "0n8812znwdyvy7d1321p4r6j5pixg1sr31z5pfr7i0ikw0jxfrxb"
      + lib.optionalString ("${teensy_architecture}" == "linux32")
        "1p74rb8g4v6kd09a0af1yra8xjzy3iyv5w5b6h6ljfhb022v3l57"
      + lib.optionalString ("${teensy_architecture}" == "linuxarm")
        "0jd9dvr8zx9hlyn6j979d66qdvzgv3dmx5x9yviqvrn1f3w4hfbf";
    };
  # Used because teensyduino requires jars be a specific size
  arduino_dist_src = fetchurl {
    url = "http://downloads.arduino.cc/arduino-${version}-${teensy_architecture}.tar.xz";
    sha256 =
      lib.optionalString ("${teensy_architecture}" == "linux64")
        "1f8s3by5lc6fazyaa9zc9kz3ar8zj8jabab1fy5jzh49fbd8bydx"
      + lib.optionalString ("${teensy_architecture}" == "linux32")
        "1r9ral9aq5vp02dwgagifk5h403l7knxdyi1w23rqpcbbpa423lw"
      + lib.optionalString ("${teensy_architecture}" == "linuxarm")
        "0sz18wns00kysmb2zv7a67dy9wpxiawq3ykfr07wjyg8h1fy3p6h";
  };


  buildInputs = [ jdk ant libusb libusb1 unzip zlib ncurses5 readline
  ] ++ stdenv.lib.optionals withTeensyduino [ upx ];
  downloadSrcList = builtins.attrValues externalDownloads;
  downloadDstList = builtins.attrNames externalDownloads;

  buildPhase = ''
    # Copy pre-downloaded files to proper locations
    download_src=($downloadSrcList)
    download_dst=($downloadDstList)
    while [[ "''${#download_src[@]}" -ne 0 ]]; do
      file_src=''${download_src[0]}
      file_dst=''${download_dst[0]}
      mkdir -p $(dirname $file_dst)
      download_src=(''${download_src[@]:1})
      download_dst=(''${download_dst[@]:1})
      cp -v $file_src $file_dst
    done

    # Deliberately break build.xml's download statement in order to cause
    # an error if anything needed is missing from download.nix.
    substituteInPlace build/build.xml --replace "get src" "get error"

    cd ./arduino-core && ant
    cd ../build && ant 
    cd ..
  '';

  # This will be patched into `arduino` wrapper script
  # Java loads gtk dynamically, so we need to provide it using LD_LIBRARY_PATH
  dynamicLibraryPath = lib.makeLibraryPath [gtk2];
  javaPath = lib.makeBinPath [jdk];

  # Everything else will be patched into rpath
  rpath = (lib.makeLibraryPath [zlib libusb libusb1 readline ncurses5 stdenv.cc.cc]);

  installPhase = ''
    mkdir -p $out/share/arduino
    cp -r ./build/linux/work/* "$out/share/arduino/"
    echo -n ${version} > $out/share/arduino/lib/version.txt

    ${stdenv.lib.optionalString withGui ''
      mkdir -p $out/bin
      substituteInPlace $out/share/arduino/arduino \
        --replace "JAVA=java" "JAVA=$javaPath/java" \
        --replace "LD_LIBRARY_PATH=" "LD_LIBRARY_PATH=$dynamicLibraryPath:"
      ln -sr "$out/share/arduino/arduino" "$out/bin/arduino"

      cp -r build/shared/icons $out/share/arduino
      mkdir -p $out/share/applications
      cp build/linux/dist/desktop.template $out/share/applications/arduino.desktop
      substituteInPlace $out/share/applications/arduino.desktop \
        --replace '<BINARY_LOCATION>' "$out/bin/arduino" \
        --replace '<ICON_NAME>' "$out/share/arduino/icons/128x128/apps/arduino.png"
    ''}

    ${stdenv.lib.optionalString withTeensyduino ''
      # Back up the original jars
      mv $out/share/arduino/lib/arduino-core.jar $out/share/arduino/lib/arduino-core.jar.bak
      mv $out/share/arduino/lib/pde.jar $out/share/arduino/lib/pde.jar.bak
      # Extract jars from the arduino distributable package
      mkdir arduino_dist
      cd arduino_dist
      tar xfJ ${arduino_dist_src} arduino-${version}/lib/arduino-core.jar arduino-${version}/lib/pde.jar
      cd ..
      # Replace the built jars with the official arduino jars
      mv arduino_dist/arduino-${version}/lib/{arduino-core,pde}.jar $out/share/arduino/lib/
      # Delete the directory now that the jars are copied out
      rm -r arduino_dist
      # Extract and patch the Teensyduino installer
      cp ${teensyduino_src} ./TeensyduinoInstall.${teensy_architecture}
      chmod +w ./TeensyduinoInstall.${teensy_architecture}
      upx -d ./TeensyduinoInstall.${teensy_architecture}
      patchelf --set-interpreter $(cat $NIX_CC/nix-support/dynamic-linker) \
          --set-rpath "${teensy_libpath}" \
          ./TeensyduinoInstall.${teensy_architecture}
      chmod +x ./TeensyduinoInstall.${teensy_architecture}
      ./TeensyduinoInstall.${teensy_architecture} --dir=$out/share/arduino
      # Check for successful installation
      [ -d $out/share/arduino/hardware/teensy ] || exit 1
      # After the install, copy the built jars back
      mv $out/share/arduino/lib/arduino-core.jar.bak $out/share/arduino/lib/arduino-core.jar
      mv $out/share/arduino/lib/pde.jar.bak $out/share/arduino/lib/pde.jar
    ''}
  '';

  # So we don't accidentally mess with firmware files
  dontStrip = true;
  dontPatchELF = true;

  preFixup = ''
    for file in $(find $out -type f \( -perm /0111 -o -name \*.so\* \) ); do
        patchelf --set-interpreter "$(cat $NIX_CC/nix-support/dynamic-linker)" "$file" || true
        patchelf --set-rpath ${rpath}:$out/lib $file || true
    done

    ${lib.concatMapStringsSep "\n"
        ({jar, file}:
          ''
              jar xvf $out/${jar} ${file}
              patchelf --set-rpath $rpath ${file}
              jar uvf $out/${jar} ${file}
              rm -f ${file}
          ''
        )
        patchelfInJars}

    # avrdude_bin is linked against libtinfo.so.5
    mkdir $out/lib/
    ln -s ${lib.makeLibraryPath [ncurses5]}/libncursesw.so.5 $out/lib/libtinfo.so.5

    ${stdenv.lib.optionalString withTeensyduino ''
      # Patch the Teensy loader binary
      patchelf --debug \
          --set-interpreter $(cat $NIX_CC/nix-support/dynamic-linker) \
          --set-rpath "${teensy_libpath}" \
          $out/share/arduino/hardware/tools/teensy
    ''}
  '';

  meta = with stdenv.lib; {
    description = "Open-source electronics prototyping platform";
    homepage = http://arduino.cc/;
    license = if withTeensyduino then licenses.unfreeRedistributable else licenses.gpl2;
    platforms = platforms.linux;
    maintainers = with maintainers; [ antono auntie robberer bjornfor ];
  };
}