class BoostMpi < Formula
  desc "C++ library for C++/MPI interoperability"
  homepage "https://www.boost.org/"
  url "https://github.com/boostorg/boost/releases/download/boost-1.90.0/boost-1.90.0-b2-nodocs.tar.xz"
  sha256 "9e6bee9ab529fb2b0733049692d57d10a72202af085e553539a05b4204211a6f"
  license "BSL-1.0"
  head "https://github.com/boostorg/boost.git", branch: "master"

  livecheck do
    formula "boost"
  end

  bottle do
    sha256                               arm64_tahoe:   "670dd9f317690572c55e29b35f850fdb2a9bf6173b24659b7386195129c6fee2"
    sha256                               arm64_sequoia: "59b9a8df7461cff1219fe857551d02ec37dbd783e2d3b173987665846fed8719"
    sha256                               arm64_sonoma:  "1ba24fd1729bf2d4fa74087d4d98db902d17bcd0d618dd6f4fff6ef49bec6abc"
    sha256                               sonoma:        "1f4b7c4cc2fd1ee4a5553385d5885162e11779d969ad949e8ddb59f1f2e8930d"
    sha256 cellar: :any_skip_relocation, arm64_linux:   "68372159bf8d129e7212b757272a6b114637444382d9c246a170a2d7d5178c37"
    sha256 cellar: :any_skip_relocation, x86_64_linux:  "d6b807df695489d80a4e89f0299941e10e733a4c1adc260bf31f425a3994db4f"
  end

  # Test with cmake to avoid issues like:
  # https://github.com/Homebrew/homebrew-core/issues/67285
  depends_on "cmake" => :test
  depends_on "boost"
  depends_on "open-mpi"

  def install
    # "layout" should be synchronized with boost
    args = %W[
      -d2
      -j#{ENV.make_jobs}
      --layout=system
      --user-config=user-config.jam
      install
      threading=multi
      link=shared,static
    ]

    # Trunk starts using "clang++ -x c" to select C compiler which breaks C++11
    # handling using ENV.cxx11. Using "cxxflags" and "linkflags" still works.
    args << "cxxflags=-std=c++11"
    args << "cxxflags=-stdlib=libc++" << "linkflags=-stdlib=libc++" if ENV.compiler == :clang

    # Avoid linkage to boost container and graph modules
    # Issue ref: https://github.com/boostorg/boost/issues/985
    args << "linkflags=-Wl,-dead_strip_dylibs" if OS.mac?

    open("user-config.jam", "a") do |file|
      if OS.mac?
        file.write "using darwin : : #{ENV.cxx} ;\n"
      else
        file.write "using gcc : : #{ENV.cxx} ;\n"
      end
      file.write "using mpi ;\n"
    end

    system "./bootstrap.sh", "--prefix=#{prefix}", "--libdir=#{lib}", "--with-libraries=mpi"

    system "./b2",
           "--prefix=install-mpi",
           "--libdir=install-mpi/lib",
           *args

    lib.install Dir["install-mpi/lib/*mpi*"]
    (lib/"cmake").install Dir["install-mpi/lib/cmake/*mpi*"]

    if OS.mac?
      # libboost_mpi links to libboost_serialization, which comes from the main boost formula
      boost = Formula["boost"]
      MachO::Tools.change_install_name("#{lib}/libboost_mpi.dylib",
                                       "libboost_serialization.dylib",
                                       "#{boost.lib}/libboost_serialization.dylib")
    end
  end

  test do
    (testpath/"test.cpp").write <<~CPP
      #include <boost/mpi.hpp>
      #include <iostream>
      #include <boost/serialization/string.hpp>
      namespace mpi = boost::mpi;

      int main(int argc, char* argv[])
      {
        mpi::environment env(argc, argv);
        mpi::communicator world;

        if (world.rank() == 0) {
          world.send(1, 0, std::string("Hello"));
          std::string msg;
          world.recv(1, 1, msg);
          std::cout << msg << "!" << std::endl;
        } else {
          std::string msg;
          world.recv(0, 0, msg);
          std::cout << msg << ", ";
          std::cout.flush();
          world.send(0, 1, std::string("world"));
        }

        return 0;
      }
    CPP

    boost = Formula["boost"]
    args = ["-L#{lib}",
            "-L#{boost.lib}",
            "-lboost_mpi",
            "-lboost_serialization",
            "-std=c++14"]

    if OS.linux?
      args << "-Wl,-rpath,#{lib}"
      args << "-Wl,-rpath,#{boost.lib}"
    end

    system "mpic++", "test.cpp", *args, "-o", "test"
    system "mpirun", "-np", "2", "./test"

    (testpath/"CMakeLists.txt").write <<~CMAKE
      cmake_minimum_required(VERSION 4.0)
      find_package(Boost COMPONENTS mpi REQUIRED)
    CMAKE
    system "cmake", ".", "-Wno-dev"
  end
end