class AstrometryNet < Formula
  include Language::Python::Virtualenv

  desc "Automatic identification of astronomical images"
  homepage "https://github.com/dstndstn/astrometry.net"
  url "https://github.com/dstndstn/astrometry.net/releases/download/0.76/astrometry.net-0.76.tar.gz"
  sha256 "244355ef9716a9e062eb19e8547e8b50434c7df52a8b96f9d0a254bc646d1f0d"
  revision 2

  bottle do
    cellar :any
    sha256 "fd35625dfe33791d24b73bac1dab5f5845e62655d953271f1c1802d95e342d6c" => :mojave
    sha256 "c7ee05767b1629f3233245121aa20ed951c6e8b8a8d55d38d3f44abe2de0c7ba" => :high_sierra
    sha256 "813cf48bb6f0554a4a32f9b2923ea6bca420e2f124c91879dafdc022f3ff5bc6" => :sierra
  end

  depends_on "pkg-config" => :build
  depends_on "swig" => :build
  depends_on "cairo"
  depends_on "cfitsio"
  depends_on "gsl"
  depends_on "jpeg"
  depends_on "libpng"
  depends_on "netpbm"
  depends_on "numpy"
  depends_on "python"
  depends_on "wcslib"

  resource "fitsio" do
    url "https://files.pythonhosted.org/packages/9c/cb/f52534b71f4d99916723af2994898904015b9a1bf0286a165182d0374bbf/fitsio-0.9.11.tar.gz"
    sha256 "a1196385ca7c42c93d9e53002d5ba574a8db452c3b53ef1189e2c150177d4266"
  end

  def install
    ENV["NETPBM_INC"] = "-I#{Formula["netpbm"].opt_include}/netpbm"
    ENV["NETPBM_LIB"] = "-L#{Formula["netpbm"].opt_lib} -lnetpbm"
    ENV["SYSTEM_GSL"] = "yes"
    ENV["PYTHON_SCRIPT"] = "#{libexec}/bin/python3"
    ENV["PYTHON"] = "python3"

    venv = virtualenv_create(libexec, "python3")
    venv.pip_install resources

    ENV["INSTALL_DIR"] = prefix
    xy = Language::Python.major_minor_version "python3"
    ENV["PY_BASE_INSTALL_DIR"] = "#{libexec}/lib/python#{xy}/site-packages/astrometry"

    system "make"
    system "make", "py"
    system "make", "install"

    # Work around for https://github.com/dstndstn/astrometry.net/issues/142
    # On the next release, remove the following two lines & add `ENV["PY_BASE_LINK_DIR"] = ...`
    rm "#{bin}/plotann.py"
    bin.install_symlink libexec/"lib/python#{xy}/site-packages/astrometry/blind/plotann.py"
  end

  test do
    system "#{bin}/build-astrometry-index", "-d", "3", "-o", "index-9918.fits",
                                            "-P", "18", "-S", "mag", "-B", "0.1",
                                            "-s", "0", "-r", "1", "-I", "9918", "-M",
                                            "-i", "#{prefix}/examples/tycho2-mag6.fits"
    (testpath/"99.cfg").write <<~EOS
      add_path .
      inparallel
      index index-9918.fits
    EOS
    system "#{bin}/solve-field", "--config", "99.cfg", "#{prefix}/examples/apod4.jpg",
                                 "--continue", "--dir", "."
    assert_predicate testpath/"apod4.solved", :exist?
    assert_predicate testpath/"apod4.wcs", :exist?
  end
end