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

  desc "Graphics Library"
  homepage "https://www.mesa3d.org/"
  url "https://mesa.freedesktop.org/archive/mesa-20.3.0.tar.xz"
  sha256 "2999738e888731531cd62b27519fa37566cc0ea2cd7d4d97f46abaa3e949c630"
  license "MIT"
  head "https://gitlab.freedesktop.org/mesa/mesa.git"

  livecheck do
    url :stable
  end

  bottle do
    sha256 "17102cdc4cb95cfbfdc154a5d0412863c22688caa4978cb1c75c02c1be66d0cc" => :big_sur
    sha256 "083ebe4e77c62675367764e71cb372eda5d03c09960acd3a56b7dbc1fd5ec5d6" => :catalina
    sha256 "e32052ed6993ee7fd970122ca2c97b9379e616fe4e74cd9987737f30811ebe3b" => :mojave
  end

  depends_on "meson" => :build
  depends_on "ninja" => :build
  depends_on "pkg-config" => :build
  depends_on "python@3.9" => :build
  depends_on "expat"
  depends_on "gettext"
  depends_on "libx11"
  depends_on "libxcb"
  depends_on "libxdamage"
  depends_on "libxext"

  resource "Mako" do
    url "https://files.pythonhosted.org/packages/72/89/402d2b4589e120ca76a6aed8fee906a0f5ae204b50e455edd36eda6e778d/Mako-1.1.3.tar.gz"
    sha256 "8195c8c1400ceb53496064314c6736719c6f25e7479cd24c77be3d9361cddc27"
  end

  resource "glxgears.c" do
    url "https://gitlab.freedesktop.org/mesa/demos/-/raw/faaa319d704ac677c3a93caadedeb91a4a74b7a7/src/xdemos/glxgears.c"
    sha256 "3873db84d708b5d8b3cac39270926ba46d812c2f6362da8e6cd0a1bff6628ae6"
  end

  resource "gl_wrap.h" do
    url "https://gitlab.freedesktop.org/mesa/demos/-/raw/faaa319d704ac677c3a93caadedeb91a4a74b7a7/src/util/gl_wrap.h"
    sha256 "c727b2341d81c2a1b8a0b31e46d24f9702a1ec55c8be3f455ddc8d72120ada72"
  end

  def install
    ENV.prepend_path "PATH", Formula["python@3.9"].opt_libexec/"bin"

    venv_root = libexec/"venv"
    venv = virtualenv_create(venv_root, "python3")
    venv.pip_install resource("Mako")

    ENV.prepend_path "PATH", "#{venv_root}/bin"

    mkdir "build" do
      system "meson", *std_meson_args, "..", "-Db_ndebug=true"
      system "ninja"
      system "ninja", "install"
    end
  end

  test do
    %w[glxgears.c gl_wrap.h].each { |r| resource(r).stage(testpath) }
    flags = %W[
      -I#{include}
      -L#{lib}
      -L#{Formula["libx11"].lib}
      -L#{Formula["libxext"].lib}
      -lGL
      -lX11
      -lXext
      -lm
    ]
    system ENV.cc, "glxgears.c", "-o", "gears", *flags
  end
end