class Cgal < Formula
  desc "Computational Geometry Algorithm Library"
  homepage "https://www.cgal.org/"
  url "https://github.com/CGAL/cgal/releases/download/releases%2FCGAL-4.14.1/CGAL-4.14.1.tar.xz"
  sha256 "d4ec2528b88a7c3a07b0b86db96c216822f85b951bf4bc7f9d1f26bf6c369afe"

  bottle do
    cellar :any
    sha256 "d9b8e3f6b52853ac92f6eaa4023a074dc8ce317ceea9e9be8b98e5a9eb06aa88" => :catalina
    sha256 "d5899f80357aaf49b2c318813ea6c39fd4c02b354495d9a5f488452808af0ccf" => :mojave
    sha256 "f7354a832cf0eb5ec2558a288ca21b9e5d4664370597d2a079ec35bce80e7ff7" => :high_sierra
  end

  depends_on "cmake" => [:build, :test]
  depends_on "boost"
  depends_on "eigen"
  depends_on "gmp"
  depends_on "mpfr"

  def install
    args = std_cmake_args + %W[
      -DCMAKE_BUILD_WITH_INSTALL_RPATH=ON
      -DCMAKE_INSTALL_NAME_DIR=#{HOMEBREW_PREFIX}/lib
      -DWITH_Eigen3=ON
      -DWITH_LAPACK=ON
      -DWITH_CGAL_Qt5=OFF
      -DWITH_CGAL_ImageIO=OFF
    ]

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

  test do
    # https://doc.cgal.org/latest/Algebraic_foundations/Algebraic_foundations_2interoperable_8cpp-example.html
    (testpath/"surprise.cpp").write <<~EOS
      #include <CGAL/basic.h>
      #include <CGAL/Coercion_traits.h>
      #include <CGAL/IO/io.h>
      template <typename A, typename B>
      typename CGAL::Coercion_traits<A,B>::Type
      binary_func(const A& a , const B& b){
          typedef CGAL::Coercion_traits<A,B> CT;
          CGAL_static_assertion((CT::Are_explicit_interoperable::value));
          typename CT::Cast cast;
          return cast(a)*cast(b);
      }
      int main(){
          std::cout<< binary_func(double(3), int(5)) << std::endl;
          std::cout<< binary_func(int(3), double(5)) << std::endl;
          return 0;
      }
    EOS
    (testpath/"CMakeLists.txt").write <<~EOS
      cmake_minimum_required(VERSION 3.1...3.13)
      find_package(CGAL)
      add_executable(surprise surprise.cpp)
      target_link_libraries(surprise PRIVATE CGAL::CGAL)
    EOS
    system "cmake", "-L", "-DCMAKE_BUILD_RPATH=#{HOMEBREW_PREFIX}/lib", "-DCMAKE_PREFIX_PATH=#{prefix}", "."
    system "cmake", "--build", ".", "-v"
    assert_equal "15\n15", shell_output("./surprise").chomp
  end
end