class Libogg < Formula
  desc "Ogg Bitstream Library"
  homepage "https://www.xiph.org/ogg/"

  stable do
    url "https://downloads.xiph.org/releases/ogg/libogg-1.3.4.tar.gz"
    sha256 "fe5670640bd49e828d64d2879c31cb4dde9758681bb664f9bdbf159a01b0c76e"

    # os_types: fix unsigned typedefs for MacOS. This is already merged upstream; remove on next version
    patch do
      url "https://github.com/xiph/ogg/commit/c8fca6b4a02d695b1ceea39b330d4406001c03ed.patch?full_index=1"
      sha256 "0f4d289aecb3d5f7329d51f1a72ab10c04c336b25481a40d6d841120721be485"
    end
  end

  bottle do
    cellar :any
    sha256 "0a03b8a7307aeac70762fd4ee9837fff4ed523c34063a6aec52c5cf34c54695f" => :catalina
    sha256 "57278622c3550ef4cfe1a14aa885daacaac50e3571d4e8f2d6a6e5e9416b8e88" => :mojave
    sha256 "7883d41539869a4db165825e6f37c74dbd082fe0e839992aae8c2f9b09d55bea" => :high_sierra
    sha256 "ba70b9105ecf35ebc6df91306eb62708c7557c2aafdb1799fd7e7424b133c237" => :sierra
  end

  head do
    url "https://git.xiph.org/ogg.git"

    depends_on "autoconf" => :build
    depends_on "automake" => :build
    depends_on "libtool" => :build
  end

  resource("oggfile") do
    url "https://upload.wikimedia.org/wikipedia/commons/c/c8/Example.ogg"
    sha256 "379071af4fa77bc7dacf892ad81d3f92040a628367d34a451a2cdcc997ef27b0"
  end

  def install
    system "./autogen.sh" if build.head?
    system "./configure", "--disable-dependency-tracking",
                          "--prefix=#{prefix}"
    system "make"
    ENV.deparallelize
    system "make", "install"
  end

  test do
    (testpath/"test.c").write <<~EOS
      #include <ogg/ogg.h>
      #include <stdio.h>

      int main (void) {
        ogg_sync_state oy;
        ogg_stream_state os;
        ogg_page og;
        ogg_packet op;
        char *buffer;
        int bytes;

        ogg_sync_init (&oy);
        buffer = ogg_sync_buffer (&oy, 4096);
        bytes = fread(buffer, 1, 4096, stdin);
        ogg_sync_wrote (&oy, bytes);
        if (ogg_sync_pageout (&oy, &og) != 1)
          return 1;
        ogg_stream_init (&os, ogg_page_serialno (&og));
        if (ogg_stream_pagein (&os, &og) < 0)
          return 1;
        if (ogg_stream_packetout (&os, &op) != 1)
         return 1;

        return 0;
      }
    EOS
    testpath.install resource("oggfile")
    system ENV.cc, "test.c", "-I#{include}", "-L#{lib}", "-logg",
                   "-o", "test"
    # Should work on an OGG file
    shell_output("./test < Example.ogg")
    # Expected to fail on a non-OGG file
    shell_output("./test < #{test_fixtures("test.wav")}", 1)
  end
end