class Libff < Formula
  desc "C++ library for Finite Fields and Elliptic Curves"
  homepage "https://github.com/scipr-lab/libff"
  # pull from git tag to get submodules
  url "https://github.com/scipr-lab/libff.git",
      tag:      "v0.2.1",
      revision: "5835b8c59d4029249645cf551f417608c48f2770"
  license "MIT"

  bottle do
    rebuild 1
    sha256 cellar: :any,                 arm64_ventura:  "12665fa3a1821e160992a72a91c67861ffd18fcc10bf255c20188474ec8785ac"
    sha256 cellar: :any,                 arm64_monterey: "3f8fff685a6b4b00cb5dc78dad9927be27c22cfdbde465e1d7f49c08ea6a9d56"
    sha256 cellar: :any,                 arm64_big_sur:  "183ad3fd1bb600316578dc051b250a02c803b03ee43af471b3ea3bac249af0d5"
    sha256 cellar: :any,                 ventura:        "b42e23e8c807c75ff7825ba73a348a3c94e6d4d31682da30377b237ad99c5e8d"
    sha256 cellar: :any,                 monterey:       "7e92d770effa52f27d690e55981eb4bbe164ab9266573b1554ae7efbf1870167"
    sha256 cellar: :any,                 big_sur:        "5c89ae786b7d9f035e65ca4a47a0f0008511a0ba701a2659c1194c2f55157507"
    sha256 cellar: :any_skip_relocation, x86_64_linux:   "e0c274f4e83f703347f24d6c6c487224b19c72eb4f199daecfbb6c794380cd17"
  end

  depends_on "cmake" => :build
  depends_on "openssl@3" => :build

  depends_on "gmp"

  def install
    # bn128 is somewhat faster, but requires an x86_64 CPU
    curve = Hardware::CPU.intel? ? "BN128" : "ALT_BN128"

    # build libff dynamically. The project only builds statically by default
    inreplace "libff/CMakeLists.txt", "STATIC", "SHARED"

    system "cmake", "-S", ".", "-B", "build",
                    "-DWITH_PROCPS=OFF",
                    "-DCURVE=#{curve}",
                    "-DOPENSSL_ROOT_DIR=#{Formula["openssl@3"].opt_prefix}",
                    "-DCMAKE_POSITION_INDEPENDENT_CODE=ON",
                    *std_cmake_args
    system "cmake", "--build", "build"
    system "cmake", "--install", "build"
  end

  test do
    (testpath/"test.cpp").write <<~EOS
      #include <libff/algebra/curves/edwards/edwards_pp.hpp>

      using namespace libff;

      int main(int argc, char *argv[]) {
        edwards_pp::init_public_params();
        return 0;
      }
    EOS

    system ENV.cxx, "-std=c++11", "test.cpp", "-I#{include}", "-L#{lib}", "-lff", "-o", "test"
    system "./test"
  end
end