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

  desc "Graphics Library"
  homepage "https://www.mesa3d.org/"
  license "MIT"
  head "https://gitlab.freedesktop.org/mesa/mesa.git", branch: "main"

  stable do
    url "https://mesa.freedesktop.org/archive/mesa-22.2.1.tar.xz"
    sha256 "0079beac0a33f45e7e0aec59e6913eafbc4268a3f1e2e330017440494f91b13c"

    patch do
      url "https://raw.githubusercontent.com/Homebrew/formula-patches/f0a40cf7d70ee5a25639b91d9a8088749a2dd04e/mesa/fix-build-on-macOS.patch"
      sha256 "a9b646e48d4e4228c3e06d8ca28f65e01e59afede91f58d4bd5a9c42a66b338d"
    end
  end

  bottle do
    sha256 arm64_monterey: "14f2329e3d6b888d43175af8c044e8aaa720fb79b96e194a6e0d20b0047417b1"
    sha256 arm64_big_sur:  "bf6c0ea6c4474b1b3bd3b3a302f5a8ba1edb97e898e13170958fdd399245a65f"
    sha256 monterey:       "19b9bcf8cf22a915ac1790372f5024cfb27843c0d1683a65d99b77ccd4dccc46"
    sha256 big_sur:        "09afc2c35670255997fa1be220f88fc074f03088de8793d00ddded8742263680"
    sha256 catalina:       "0fa800d2e2c30dff290e78e3d600ed351aef2e38c182bc18780d34e6964c28bc"
    sha256 x86_64_linux:   "72136f9dfa7aeb79f325669383b4f0a35aef96a03777b19f0586e8b394226756"
  end

  depends_on "bison" => :build # can't use form macOS, needs '> 2.3'
  depends_on "meson" => :build
  depends_on "ninja" => :build
  depends_on "pkg-config" => :build
  depends_on "python@3.10" => :build
  depends_on "xorgproto" => :build

  depends_on "expat"
  depends_on "gettext"
  depends_on "libx11"
  depends_on "libxcb"
  depends_on "libxdamage"
  depends_on "libxext"

  uses_from_macos "flex" => :build
  uses_from_macos "llvm"
  uses_from_macos "ncurses"
  uses_from_macos "zlib"

  on_linux do
    depends_on "elfutils"
    depends_on "glslang"
    depends_on "gzip"
    depends_on "libdrm"
    depends_on "libva"
    depends_on "libvdpau"
    depends_on "libxfixes"
    depends_on "libxrandr"
    depends_on "libxshmfence"
    depends_on "libxv"
    depends_on "libxvmc"
    depends_on "libxxf86vm"
    depends_on "lm-sensors"
    depends_on "wayland"
    depends_on "wayland-protocols"
  end

  fails_with gcc: "5"

  resource "Mako" do
    url "https://files.pythonhosted.org/packages/b9/38/c25f0874ea71802fc6f1e9f0f88a7e9666818121b28991bbc1d8eddbcdb1/Mako-1.2.3.tar.gz"
    sha256 "7fde96466fcfeedb0eed94f187f20b23d85e4cb41444be0e542e2c8c65c396cd"
  end

  resource "Pygments" do
    url "https://files.pythonhosted.org/packages/e0/ef/5905cd3642f2337d44143529c941cc3a02e5af16f0f65f81cbef7af452bb/Pygments-2.13.0.tar.gz"
    sha256 "56a8508ae95f98e2b9bdf93a6be5ae3f7d8af858b43e02c5a2ff083726be40c1"
  end

  resource "MarkupSafe" do
    url "https://files.pythonhosted.org/packages/1d/97/2288fe498044284f39ab8950703e88abbac2abbdf65524d576157af70556/MarkupSafe-2.1.1.tar.gz"
    sha256 "7f91197cc9e48f989d12e4e6fbc46495c446636dfc81b9ccf50bb0ec74b91d4b"
  end

  resource "glxgears.c" do
    url "https://gitlab.freedesktop.org/mesa/demos/-/raw/db5ad06a346774a249b22797e660d55bde0d9571/src/xdemos/glxgears.c"
    sha256 "3873db84d708b5d8b3cac39270926ba46d812c2f6362da8e6cd0a1bff6628ae6"
  end

  resource "gl_wrap.h" do
    url "https://gitlab.freedesktop.org/mesa/demos/-/raw/ddc35ca0ea2f18c5011c5573b4b624c128ca7616/src/util/gl_wrap.h"
    sha256 "41f5a84f8f5abe8ea2a21caebf5ff31094a46953a83a738a19e21c010c433c88"
  end

  def install
    venv_root = buildpath/"venv"
    venv = virtualenv_create(venv_root, "python3.10")

    %w[Mako Pygments MarkupSafe].each do |res|
      venv.pip_install resource(res)
    end

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

    args = ["-Db_ndebug=true"]

    if OS.linux?
      args += %w[
        -Dplatforms=x11,wayland
        -Dglx=auto
        -Ddri3=true
        -Dgallium-drivers=auto
        -Dgallium-omx=disabled
        -Degl=true
        -Dgbm=true
        -Dopengl=true
        -Dgles1=enabled
        -Dgles2=enabled
        -Dgallium-xvmc=disabled
        -Dvalgrind=false
        -Dtools=drm-shim,etnaviv,freedreno,glsl,nir,nouveau,xvmc,lima
      ]
    end

    system "meson", "build", *args, *std_meson_args
    system "meson", "compile", "-C", "build"
    system "meson", "install", "-C", "build"
    inreplace lib/"pkgconfig/dri.pc" do |s|
      s.change_make_var! "dridriverdir", HOMEBREW_PREFIX/"lib/dri"
    end

    if OS.linux?
      # Strip executables/libraries/object files to reduce their size
      system("strip", "--strip-unneeded", "--preserve-dates", *(Dir[bin/"**/*", lib/"**/*"]).select do |f|
        f = Pathname.new(f)
        f.file? && (f.elf? || f.extname == ".a")
      end)
    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