class Tesseract < Formula
  desc "OCR (Optical Character Recognition) engine"
  homepage "https://github.com/tesseract-ocr/"
  url "https://github.com/tesseract-ocr/tesseract/archive/3.04.00.tar.gz"
  sha256 "7e6e48b625e1fba9bc825a4ef8c39f12c60aae1084939133b3c6a00f8f8dc38c"

  bottle do
    sha256 "f5a816886dc08e21af1e54f5f858aad467bb89d58675b7cbabf85cc4660e57bc" => :el_capitan
    sha256 "78c7929c7e5cd92db137aa16a5d787bb53dca84031c7afcd91039a4adfcaabe1" => :yosemite
    sha256 "0c331fa0bb3a247039af2f96441cc7ac7e1e687cb2e48e315bcabd227f9ba97d" => :mavericks
    sha256 "141b3d5d09b1cf6448ca32f8377e40eeafc6f2e71134ccd5c67ce4b76cd6388a" => :mountain_lion
  end

  head do
    url "https://github.com/tesseract-ocr/tesseract.git"

    depends_on "autoconf" => :build
    depends_on "automake" => :build
    depends_on "libtool" => :build
    depends_on "pkg-config" => :build

    resource "tessdata-head" do
      url "https://github.com/tesseract-ocr/tessdata.git"
    end
  end

  option "all-languages", "Install recognition data for all languages"
  option "with-training-tools", "Install OCR training tools"
  option "with-opencl", "Enable OpenCL support"

  depends_on "libtiff" => :recommended
  depends_on "leptonica"

  if build.with? "training-tools"
    depends_on "libtool" => :build
    depends_on "icu4c"
    depends_on "glib"
    depends_on "cairo"
    depends_on "pango"
    depends_on :x11
  end

  needs :cxx11

  fails_with :llvm do
    build 2206
    cause "Executable 'tesseract' segfaults on 10.6 when compiled with llvm-gcc"
  end

  resource "tessdata" do
    url "https://github.com/tesseract-ocr/tessdata/archive/3.04.00.tar.gz"
    sha256 "5dcb37198336b6953843b461ee535df1401b41008d550fc9e43d0edabca7adb1"
  end

  resource "eng" do
    url "https://github.com/tesseract-ocr/tessdata/raw/3.04.00/eng.traineddata"
    sha256 "c0515c9f1e0c79e1069fcc05c2b2f6a6841fb5e1082d695db160333c1154f06d"
  end

  resource "osd" do
    url "https://github.com/tesseract-ocr/tessdata/raw/3.04.00/osd.traineddata"
    sha256 "9cf5d576fcc47564f11265841e5ca839001e7e6f38ff7f7aacf46d15a96b00ff"
  end

  def install
    # explicitly state leptonica header location, as the makefile defaults to /usr/local/include,
    # which doesn't work for non-default homebrew location
    ENV["LIBLEPT_HEADERSDIR"] = HOMEBREW_PREFIX/"include"

    ENV.cxx11

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

    args = %W[
      --disable-dependency-tracking
      --prefix=#{prefix}
    ]
    args << "--enable-opencl" if build.with? "opencl"
    system "./configure", *args

    system "make", "install"
    if build.with? "training-tools"
      system "make", "training"
      system "make", "training-install"
    end
    if build.head?
      resource("tessdata-head").stage { mv Dir["*"], share/"tessdata" }
    elsif build.include? "all-languages"
      resource("tessdata").stage { mv Dir["*"], share/"tessdata" }
    else
      resource("eng").stage { mv "eng.traineddata", share/"tessdata" }
      resource("osd").stage { mv "osd.traineddata", share/"tessdata" }
    end
  end
end