require "formula"

class Flac < Formula
  homepage "http://xiph.org/flac/"
  url "http://downloads.xiph.org/releases/flac/flac-1.3.0.tar.xz"
  sha1 "a136e5748f8fb1e6c524c75000a765fc63bb7b1b"

  head do
    url "git://git.xiph.org/flac.git"
    depends_on "autoconf" => :build
    depends_on "automake" => :build
    depends_on "libtool" => :build
  end

  bottle do
    cellar :any
    revision 2
    sha1 "727da2e469235bc5e62a2daf6083a12672833762" => :mountain_lion
    sha1 "085ed13b395fff327ee104ed7771ab1afdc33960" => :lion
  end

  option :universal

  depends_on "pkg-config" => :build
  depends_on "lame"
  depends_on "libogg" => :optional

  fails_with :llvm do
    build 2326
    cause "Undefined symbols when linking"
  end

  def install
    ENV.universal_binary if build.universal?

    ENV.append "CFLAGS", "-std=gnu89"

    system "./autogen.sh" if build.head?

    args = %W[
      --disable-dependency-tracking
      --disable-debug
      --prefix=#{prefix}
      --mandir=#{man}
      --enable-sse
      --enable-static
    ]

    args << "--without-ogg" if build.without? "libogg"

    system "./configure", *args

    ENV["OBJ_FORMAT"]="macho"

    # adds universal flags to the generated libtool script
    inreplace "libtool" do |s|
      s.gsub! ":$verstring\"", ":$verstring -arch #{Hardware::CPU.arch_32_bit} -arch #{Hardware::CPU.arch_64_bit}\""
    end

    system "make install"
    (bin/"flac2mp3").write DATA.read
  end
end

__END__
#!/usr/bin/env ruby
# https://github.com/rmndk/flac2mp3

filename, quality = ARGV[0], ARGV[1]
abort "Usage: flac2mp3 FLACFILE [V2|V1|V0|320]\nDefault (and recommended) quality is V0." if filename.nil?

qualarg = case quality
    when "V0","V1","V2" then quality
    when "320" then "b 320"
    else "V0"
end

map = {"TITLE" => "--tt", "ARTIST" => "--ta", "ALBUM" => "--tl", "TRACKNUMBER" => "--tn", "GENRE" => "--tg", "DATE" => "--ty"}
args = ""

`metaflac --export-tags-to=- "#{filename}"`.each_line do |line|
    key, value = line.strip.split('=', 2)
    key.upcase!
    args << %Q{#{map[key]} "#{value.gsub('"', '\"')}" } if map[key]
end

basename = File.basename(filename, File.extname(filename))

puts "Encoding #{basename}.mp3"
exec %Q[flac -sdc "#{filename}" | lame -#{qualarg} #{args} - "#{basename}.mp3"]