class Gdcm < Formula
  desc "Grassroots DICOM library and utilities for medical files"
  homepage "https://sourceforge.net/projects/gdcm/"
  url "https://github.com/malaterre/GDCM/archive/v3.0.7.tar.gz"
  sha256 "e00881f0a93d2db4a686231d5f1092a4bc888705511fe5d90114f2226147a18d"
  license "BSD-3-Clause"

  livecheck do
    url "https://github.com/malaterre/GDCM/releases/latest"
    regex(%r{href=.*?/tag/v?(\d+(?:\.\d+)+)["' >]}i)
  end

  bottle do
    rebuild 1
    sha256 "b4fcbfc9a2dd14f8d5b0cc1fd1f5900465b469a1f05fbae51f09bc209a578dac" => :catalina
    sha256 "67a12632e5705ed9ce8b72061b88b16246114d89a9e0594c1dd60100869e7412" => :mojave
    sha256 "6210fcdf8afd786ec2b49c74f1d5bd6d4e0f40e1404ffdbb0ee40c66ef53715d" => :high_sierra
  end

  depends_on "cmake" => :build
  depends_on "ninja" => :build
  depends_on "pkg-config" => :build
  depends_on "swig" => :build
  depends_on "openjpeg"
  depends_on "openssl@1.1"
  depends_on "python@3.8"
  depends_on "vtk"

  def install
    ENV.cxx11

    python3 = Formula["python@3.8"].opt_bin/"python3"
    xy = Language::Python.major_minor_version python3
    python_include =
      Utils.safe_popen_read(python3, "-c", "from distutils import sysconfig;print(sysconfig.get_python_inc(True))")
           .chomp
    python_executable = Utils.safe_popen_read(python3, "-c", "import sys;print(sys.executable)").chomp

    args = std_cmake_args + %W[
      -GNinja
      -DGDCM_BUILD_APPLICATIONS=ON
      -DGDCM_BUILD_SHARED_LIBS=ON
      -DGDCM_BUILD_TESTING=OFF
      -DGDCM_BUILD_EXAMPLES=OFF
      -DGDCM_BUILD_DOCBOOK_MANPAGES=OFF
      -DGDCM_USE_VTK=ON
      -DGDCM_USE_SYSTEM_OPENJPEG=ON
      -DGDCM_USE_SYSTEM_OPENSSL=ON
      -DGDCM_WRAP_PYTHON=ON
      -DPYTHON_EXECUTABLE=#{python_executable}
      -DPYTHON_INCLUDE_DIR=#{python_include}
      -DGDCM_INSTALL_PYTHONMODULE_DIR=#{lib}/python#{xy}/site-packages
      -DCMAKE_INSTALL_RPATH=#{lib}
      -DGDCM_NO_PYTHON_LIBS_LINKING=ON
    ]

    mkdir "build" do
      ENV.append "LDFLAGS", "-undefined dynamic_lookup"

      system "cmake", "..", *args
      system "ninja"
      system "ninja", "install"
    end
  end

  test do
    (testpath/"test.cxx").write <<~EOS
      #include "gdcmReader.h"
      int main(int, char *[])
      {
        gdcm::Reader reader;
        reader.SetFileName("file.dcm");
      }
    EOS

    system ENV.cxx, "-std=c++11", "-isystem", "#{include}/gdcm-3.0", "-o", "test.cxx.o", "-c", "test.cxx"
    system ENV.cxx, "-std=c++11", "test.cxx.o", "-o", "test", "-L#{lib}", "-lgdcmDSED"
    system "./test"

    system Formula["python@3.8"].opt_bin/"python3", "-c", "import gdcm"
  end
end