class Mpd < Formula
  desc "Music Player Daemon"
  homepage "https://www.musicpd.org/"
  url "https://www.musicpd.org/download/mpd/0.21/mpd-0.21.18.tar.xz"
  sha256 "8782e66cd5afd6c92860725196b35b6df07d3d127ef70e900e144323089e9442"
  head "https://github.com/MusicPlayerDaemon/MPD.git"

  bottle do
    cellar :any
    sha256 "97205bdca3c0ab031163f0b6721a4a07072de25d98c9ebab9228c97a7e0ee651" => :catalina
    sha256 "d50ccd6d119e4d7a8b2d5fb6267e2b576f2f8d35eb27f0e2885fc2f4b7db7ef6" => :mojave
    sha256 "97c3161fd3a06c8158c388a3c2a094b4698f73ef7218270ede11d7bcd7f06d94" => :high_sierra
  end

  depends_on "boost" => :build
  depends_on "meson" => :build
  depends_on "ninja" => :build
  depends_on "pkg-config" => :build
  depends_on "expat"
  depends_on "faad2"
  depends_on "ffmpeg"
  depends_on "flac"
  depends_on "fluid-synth"
  depends_on "glib"
  depends_on "icu4c"
  depends_on "lame"
  depends_on "libao"
  depends_on "libgcrypt"
  depends_on "libid3tag"
  depends_on "libmpdclient"
  depends_on "libnfs"
  depends_on "libsamplerate"
  depends_on "libupnp"
  depends_on "libvorbis"
  depends_on "opus"
  depends_on "sqlite"

  # Fix compilation with Clang
  # This patch backports https://github.com/MusicPlayerDaemon/MPD/commit/dca0519336586be95b920004178114a097681768
  # Remove in next release
  patch :DATA

  def install
    # mpd specifies -std=gnu++0x, but clang appears to try to build
    # that against libstdc++ anyway, which won't work.
    # The build is fine with G++.
    ENV.libcxx

    args = %W[
      --prefix=#{prefix}
      --sysconfdir=#{etc}
      -Dlibwrap=disabled
      -Dmad=disabled
      -Dmpcdec=disabled
      -Dsoundcloud=disabled
      -Dao=enabled
      -Dbzip2=enabled
      -Dexpat=enabled
      -Dffmpeg=enabled
      -Dfluidsynth=enabled
      -Dnfs=enabled
      -Dupnp=enabled
      -Dvorbisenc=enabled
    ]

    system "meson", *args, "output/release", "."
    system "ninja", "-C", "output/release"
    ENV.deparallelize # Directories are created in parallel, so let's not do that
    system "ninja", "-C", "output/release", "install"

    (etc/"mpd").install "doc/mpdconf.example" => "mpd.conf"
  end

  def caveats; <<~EOS
    MPD requires a config file to start.
    Please copy it from #{etc}/mpd/mpd.conf into one of these paths:
      - ~/.mpd/mpd.conf
      - ~/.mpdconf
    and tailor it to your needs.
  EOS
  end

  plist_options :manual => "mpd"

  def plist; <<~EOS
    <?xml version="1.0" encoding="UTF-8"?>
    <!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
    <plist version="1.0">
    <dict>
        <key>Label</key>
        <string>#{plist_name}</string>
        <key>WorkingDirectory</key>
        <string>#{HOMEBREW_PREFIX}</string>
        <key>ProgramArguments</key>
        <array>
            <string>#{opt_bin}/mpd</string>
            <string>--no-daemon</string>
        </array>
        <key>RunAtLoad</key>
        <true/>
        <key>KeepAlive</key>
        <true/>
        <key>ProcessType</key>
        <string>Interactive</string>
    </dict>
    </plist>
  EOS
  end

  test do
    pid = fork do
      exec "#{bin}/mpd --stdout --no-daemon --no-config"
    end
    sleep 2

    begin
      ohai "Connect to MPD command (localhost:6600)"
      TCPSocket.open("localhost", 6600) do |sock|
        assert_match "OK MPD", sock.gets
        ohai "Ping server"
        sock.puts("ping")
        assert_match "OK", sock.gets
        sock.close
      end
    ensure
      Process.kill "SIGINT", pid
      Process.wait pid
    end
  end
end

__END__
diff --git a/src/util/Compiler.h b/src/util/Compiler.h
index 96f63fae4..04e49bb61 100644
--- a/src/util/Compiler.h
+++ b/src/util/Compiler.h
@@ -145,7 +145,7 @@

 #if GCC_CHECK_VERSION(7,0)
 #define gcc_fallthrough __attribute__((fallthrough))
-#elif CLANG_CHECK_VERSION(10,0)
+#elif CLANG_CHECK_VERSION(10,0) && defined(__cplusplus)
 #define gcc_fallthrough [[fallthrough]]
 #else
 #define gcc_fallthrough