class BerkeleyDbAT4 < Formula
  desc "High performance key/value database"
  homepage "https://www.oracle.com/technology/products/berkeley-db/index.html"
  url "https://download.oracle.com/berkeley-db/db-4.8.30.tar.gz"
  sha256 "e0491a07cdb21fb9aa82773bbbedaeb7639cbd0e7f96147ab46141e0045db72a"

  bottle do
    cellar :any
    rebuild 1
    sha256 "dd3b7576ecc1a56ebf51c5104eba8fd129d26efd6cd47adeeeb1ec203bbab712" => :catalina
    sha256 "cb0243107a7db2e935f10533d1e9b34f12681861125e208463b240572b86507d" => :mojave
    sha256 "03f1fc49446d69741f764d7e7388a6006fc5cdb2a0a710b1389b5b662b25e9b7" => :high_sierra
    sha256 "93b2d7980cba62914bcce0a631a8f28212a17e2cfdce1f41db3d47ec3da37fde" => :sierra
  end

  keg_only :versioned_formula

  # Fix build with recent clang
  patch do
    url "https://raw.githubusercontent.com/Homebrew/formula-patches/4c55b1/berkeley-db%404/clang.diff"
    sha256 "86111b0965762f2c2611b302e4a95ac8df46ad24925bbb95a1961542a1542e40"
  end

  def install
    # BerkeleyDB dislikes parallel builds
    ENV.deparallelize

    args = %W[
      --disable-debug
      --prefix=#{prefix}
      --mandir=#{man}
      --enable-cxx
    ]

    # BerkeleyDB requires you to build everything from the build_unix subdirectory
    cd "build_unix" do
      system "../dist/configure", *args
      system "make", "install"

      # use the standard docs location
      doc.parent.mkpath
      mv prefix+"docs", doc
    end
  end

  test do
    (testpath/"test.cpp").write <<~EOS
      #include <assert.h>
      #include <string.h>
      #include <db_cxx.h>
      int main() {
        Db db(NULL, 0);
        assert(db.open(NULL, "test.db", NULL, DB_BTREE, DB_CREATE, 0) == 0);

        const char *project = "Homebrew";
        const char *stored_description = "The missing package manager for macOS";
        Dbt key(const_cast<char *>(project), strlen(project) + 1);
        Dbt stored_data(const_cast<char *>(stored_description), strlen(stored_description) + 1);
        assert(db.put(NULL, &key, &stored_data, DB_NOOVERWRITE) == 0);

        Dbt returned_data;
        assert(db.get(NULL, &key, &returned_data, 0) == 0);
        assert(strcmp(stored_description, (const char *)(returned_data.get_data())) == 0);

        assert(db.close(0) == 0);
      }
    EOS
    flags = %W[
      -I#{include}
      -L#{lib}
      -ldb_cxx
    ]
    system ENV.cxx, "test.cpp", "-o", "test", *flags
    system "./test"
    assert_predicate testpath/"test.db", :exist?
  end
end