class NanopbGenerator < Formula
  include Language::Python::Shebang

  desc "C library for encoding and decoding Protocol Buffer messages"
  homepage "https://jpa.kapsi.fi/nanopb/docs/index.html"
  url "https://jpa.kapsi.fi/nanopb/download/nanopb-0.4.7.tar.gz"
  sha256 "87055a0d9a99a95429a95497e566e59d8d16103cfd90b7b6e8ee364b6559666a"
  license "Zlib"

  livecheck do
    url "https://jpa.kapsi.fi/nanopb/download/"
    regex(/href=.*?nanopb[._-]v?(\d+(?:\.\d+)+)\.t/i)
  end

  bottle do
    sha256 cellar: :any_skip_relocation, all: "8fa99a6f2d8fbb4fc69952cc533309c554578f983f5413d882bd86d9ddef37b7"
  end

  depends_on "protobuf"
  depends_on "python@3.11"

  conflicts_with "mesos",
    because: "they depend on an incompatible version of protobuf"

  def install
    cd "generator" do
      system "make", "-C", "proto"
      rewrite_shebang detected_python_shebang, "nanopb_generator.py"
      libexec.install "nanopb_generator.py", "protoc-gen-nanopb", "proto"
      bin.install_symlink libexec/"protoc-gen-nanopb", libexec/"nanopb_generator.py"
      rewrite_shebang detected_python_shebang, libexec/"protoc-gen-nanopb"
    end
  end

  test do
    (testpath/"test.proto").write <<~EOS
      syntax = "proto2";

      message Test {
        required string test_field = 1;
      }
    EOS

    system Formula["protobuf"].bin/"protoc",
      "--proto_path=#{testpath}", "--plugin=#{bin}/protoc-gen-nanopb",
      "--nanopb_out=#{testpath}", testpath/"test.proto"
    system "grep", "Test", testpath/"test.pb.c"
    system "grep", "Test", testpath/"test.pb.h"
  end
end