require 'formula'

class OpenBabel < Formula
  homepage 'http://www.openbabel.org'

  stable do
    url 'https://downloads.sourceforge.net/project/openbabel/openbabel/2.3.2/openbabel-2.3.2.tar.gz'
    sha1 'b8831a308617d1c78a790479523e43524f07d50d'

    # Patch to support libc++ in OS X 10.9+, backport of upstream commit c3abbddae78e654df9322ad1020ff79dd6332946
    patch do
      url "https://gist.githubusercontent.com/erlendurj/40689d57bea3b0b0c767/raw/f8c87557bcdbd79fb796e06088cdd77123c9260a/ob-mavericks.patch"
      sha1 "3ea95b20fdbe50f656f3073ef8916974495b569a"
    end

    # Patch to fix Molecule.draw() in pybel in accordance with upstream commit df59c4a630cf753723d1318c40479d48b7507e1c
    patch do
      url "https://gist.githubusercontent.com/fredrikw/5858168/raw/e4b5899e781d5707f5c386e436b5fc7810f2010d/ob-2-3-2-patch.diff"
      sha1 "e304c308b39a465b632b397aa669c26f4b375da1"
    end
  end
  bottle do
    sha256 "e632200d401723ed2f24181a785eb10234d2698a5d360f22356a13063bd46f0e" => :yosemite
    sha256 "4e18fbaba55efdc7a2f07743afeda5cb32d13ac987c1929968bef8ef16d3859b" => :mavericks
    sha256 "0350407844a4bbc86dbf0c6dd562ca6bac7b71b92251cfdf222a9f1d2a092306" => :mountain_lion
  end


  head do
    url 'https://github.com/openbabel/openbabel.git'
  end

  option 'with-cairo',  'Support PNG depiction'
  option 'with-java',   'Compile Java language bindings'
  option 'with-python', 'Compile Python language bindings'
  option 'with-wxmac',  'Build with GUI'

  depends_on 'pkg-config' => :build
  depends_on 'cmake' => :build
  depends_on :python => :optional
  depends_on 'wxmac' => :optional
  depends_on 'cairo' => :optional
  depends_on 'eigen'
  depends_on 'swig' if build.with? 'python' or build.with? 'java'

  def install
    args = std_cmake_args
    args << "-DRUN_SWIG=ON" if build.with? 'python' or build.with? 'java'
    args << "-DJAVA_BINDINGS=ON" if build.with? 'java'
    args << "-DBUILD_GUI=ON" if build.with? 'wxmac'

    # Look for Cairo in HOMEBREW_PREFIX (automatic detection with cmake is fixed in HEAD)
    if build.with? 'cairo' and not build.head?
      args << "-DCAIRO_INCLUDE_DIRS='#{HOMEBREW_PREFIX}/include/cairo'"
      args << "-DCAIRO_LIBRARIES='#{HOMEBREW_PREFIX}/lib/libcairo.dylib'"
    end

    # Point cmake towards correct python
    if build.with? 'python'
      pypref = `python -c 'import sys;print(sys.prefix)'`.strip
      pyinc = `python -c 'from distutils import sysconfig;print(sysconfig.get_python_inc(True))'`.strip
      args << "-DPYTHON_BINDINGS=ON"
      args << "-DPYTHON_INCLUDE_DIR='#{pyinc}'"
      args << "-DPYTHON_LIBRARY='#{pypref}/lib/libpython2.7.dylib'"
    end

    args << '..'

    mkdir 'build' do
      system "cmake", *args
      system "make"
      system "make install"
    end

    # Manually install the python files (fixed in HEAD)
    if build.with? 'python' and not build.head?
      (lib+'python2.7/site-packages').install lib/'openbabel.py', lib/'pybel.py', lib/'_openbabel.so'
    end
  end

  def caveats
    <<-EOS.undent
      Java libraries are installed to #{HOMEBREW_PREFIX}/lib so this path should be
      included in the CLASSPATH environment variable.
    EOS
  end

  test do
    system "obabel", "-:'C1=CC=CC=C1Br'", "-omol"
  end
end