class Mavsdk < Formula
  include Language::Python::Virtualenv

  desc "API and library for MAVLink compatible systems written in C++17"
  homepage "https://mavsdk.mavlink.io"
  url "https://github.com/mavlink/MAVSDK.git",
      tag:      "v1.0.0",
      revision: "3174bc39e29bdc8fa458cbb651b0cd9fa1d79dee"
  license "BSD-3-Clause"

  livecheck do
    url :stable
    regex(/^v?(\d+(?:\.\d+)+)$/i)
  end

  bottle do
    sha256 cellar: :any,                 arm64_monterey: "0abc8ad7f81cfbfc764bac2c37aaa86bf443cfc6839624350981685c85aa4b28"
    sha256 cellar: :any,                 arm64_big_sur:  "b5ec9ad1c8222b6f680c263f503bad2afeef667e20e39559eb7997eacb1afbd9"
    sha256 cellar: :any,                 monterey:       "648371137ce1537e4f2450a335816edd4bbd7e85a263221410694454afdc5254"
    sha256 cellar: :any,                 big_sur:        "95dca4bc8a05369954e08bad768fc302147e8a6d9913dbc866e855ae1385adc1"
    sha256 cellar: :any,                 catalina:       "f98c3d47f72a7544aac6d31e7c3baf29db528ca6f84ac1f92163fe58a1e37a0d"
    sha256 cellar: :any_skip_relocation, x86_64_linux:   "cf8cab1f7f15bc61801667d32f5b507b7fb14b628a3b5a2f52a85334d1f95c22"
  end

  depends_on "cmake" => :build
  depends_on "python@3.9" => :build
  depends_on "six" => :build
  depends_on "abseil"
  depends_on "c-ares"
  depends_on "curl"
  depends_on "grpc"
  depends_on "jsoncpp"
  depends_on "openssl@1.1"
  depends_on "protobuf"
  depends_on "re2"
  depends_on "tinyxml2"

  uses_from_macos "zlib"

  on_macos do
    depends_on "llvm" if DevelopmentTools.clang_build_version <= 1100
  end

  on_linux do
    depends_on "gcc"
  end

  fails_with :clang do
    build 1100
    cause <<-EOS
      Undefined symbols for architecture x86_64:
        "std::__1::__fs::filesystem::__status(std::__1::__fs::filesystem::path const&, std::__1::error_code*)"
    EOS
  end

  fails_with gcc: "5"

  # To update the resources, use homebrew-pypi-poet on the PyPI package `protoc-gen-mavsdk`.
  # These resources are needed to install protoc-gen-mavsdk, which we use to regenerate protobuf headers.
  # This is needed when brewed protobuf is newer than upstream's vendored protobuf.
  resource "Jinja2" do
    url "https://files.pythonhosted.org/packages/91/a5/429efc6246119e1e3fbf562c00187d04e83e54619249eb732bb423efa6c6/Jinja2-3.0.3.tar.gz"
    sha256 "611bb273cd68f3b993fabdc4064fc858c5b47a973cb5aa7999ec1ba405c87cd7"
  end

  resource "MarkupSafe" do
    url "https://files.pythonhosted.org/packages/bf/10/ff66fea6d1788c458663a84d88787bae15d45daa16f6b3ef33322a51fc7e/MarkupSafe-2.0.1.tar.gz"
    sha256 "594c67807fb16238b30c44bdf74f36c02cdf22d1c8cda91ef8a0ed8dabf5620a"
  end

  def install
    # Fix version being reported as `v#{version}-dirty`
    inreplace "CMakeLists.txt", "OUTPUT_VARIABLE VERSION_STR", "OUTPUT_VARIABLE VERSION_STR_IGNORED"

    ENV.llvm_clang if OS.mac? && (DevelopmentTools.clang_build_version <= 1100)

    # Install protoc-gen-mavsdk deps
    venv_dir = buildpath/"bootstrap"
    venv = virtualenv_create(venv_dir, "python3")
    venv.pip_install resources

    # Install protoc-gen-mavsdk
    venv.pip_install "proto/pb_plugins"

    # Run generator script in an emulated virtual env.
    with_env(
      VIRTUAL_ENV: venv_dir,
      PATH:        "#{venv_dir}/bin:#{ENV["PATH"]}",
    ) do
      system "tools/generate_from_protos.sh"
    end

    # Source build adapted from
    # https://mavsdk.mavlink.io/develop/en/contributing/build.html
    system "cmake", *std_cmake_args,
                    "-Bbuild/default",
                    "-DSUPERBUILD=OFF",
                    "-DBUILD_SHARED_LIBS=ON",
                    "-DBUILD_MAVSDK_SERVER=ON",
                    "-DBUILD_TESTS=OFF",
                    "-DVERSION_STR=v#{version}-#{tap.user}",
                    "-DCMAKE_INSTALL_RPATH=#{rpath}",
                    "-H."
    system "cmake", "--build", "build/default"
    system "cmake", "--build", "build/default", "--target", "install"
  end

  test do
    # Force use of Clang on Mojave
    ENV.clang if OS.mac?

    (testpath/"test.cpp").write <<~EOS
      #include <iostream>
      #include <mavsdk/mavsdk.h>
      int main() {
          mavsdk::Mavsdk mavsdk;
          std::cout << mavsdk.version() << std::endl;
          return 0;
      }
    EOS
    system ENV.cxx, "-std=c++17", testpath/"test.cpp", "-o", "test",
                    "-I#{include}", "-L#{lib}", "-lmavsdk"
    assert_match "v#{version}-#{tap.user}", shell_output("./test").chomp

    assert_equal "Usage: #{bin}/mavsdk_server [Options] [Connection URL]",
                 shell_output("#{bin}/mavsdk_server --help").split("\n").first
  end
end
