class XorgServer < Formula
  desc "X Window System display server"
  homepage "https://www.x.org"
  url "https://www.x.org/releases/individual/xserver/xorg-server-21.1.6.tar.xz"
  sha256 "1eb86ed674d042b6c8b1f9135e59395cbbca35ed551b122f73a7d8bb3bb22484"
  license all_of: ["MIT", "APSL-2.0"]

  bottle do
    sha256 arm64_ventura:  "d9e8763f9c626e33fdd588560292b9b40808b700b0626a1447ed8221e84be118"
    sha256 arm64_monterey: "08ff802a6846e14b45b161fc90561b430b9196627589638b667d42c94fc2c44d"
    sha256 arm64_big_sur:  "ac1815046be1cbdb3de0ec6ff255d42ff367b70b16c2e83a912af6e8e34987b0"
    sha256 ventura:        "db951b6b598f1f06c399ab099d02a2f4a10fdda3f77fe42cc1178c9bf772d890"
    sha256 monterey:       "7f53b65000508cb7074ab7be0b9298a8cb8643a01226931fb902ea1fa0f10d53"
    sha256 big_sur:        "b024b869d7d7b1f9f7c23cf4036488fea44c18484549cfad77e59847c6714abe"
    sha256 x86_64_linux:   "18d0f486f0c19d60bc2760be2cc3eaa7dff4745acc1577a89b12aec1d68f3b1c"
  end

  depends_on "font-util"   => :build
  depends_on "libxkbfile"  => :build
  depends_on "meson"       => :build
  depends_on "ninja"       => :build
  depends_on "pkg-config"  => :build
  depends_on "util-macros" => :build
  depends_on "xorgproto"   => :build
  depends_on "xtrans"      => :build

  depends_on "libxfixes"
  depends_on "libxfont2"
  depends_on "mesa"
  depends_on "pixman"
  depends_on "xauth"
  depends_on "xcb-util"
  depends_on "xcb-util-image"
  depends_on "xcb-util-keysyms"
  depends_on "xcb-util-renderutil"
  depends_on "xcb-util-wm"
  depends_on "xkbcomp"
  depends_on "xkeyboardconfig"

  on_macos do
    depends_on "libapplewm"
  end

  on_linux do
    depends_on "dbus"
    depends_on "libdrm"
    depends_on "libepoxy"
    depends_on "libxcvt"
    depends_on "libxshmfence"
    depends_on "nettle"
    depends_on "systemd"

    resource "xvfb-run" do
      url "https://salsa.debian.org/xorg-team/xserver/xorg-server/-/raw/xorg-server-2_21.1.4-1/debian/local/xvfb-run"
      sha256 "fd05e0f8e6207c3984b980a0f037381c9c4a6f22a6dd94fdcfa995318db2a0a4"
    end

    resource "xvfb-run.1" do
      url "https://salsa.debian.org/xorg-team/xserver/xorg-server/-/raw/xorg-server-2_21.1.4-1/debian/local/xvfb-run.1"
      sha256 "08f14f55e14e52e5d98713c4d8f25ae68d67e2ee188dc0247770c6ada6e27c05"
    end
  end

  def install
    # ChangeLog contains some non relocatable strings
    rm "ChangeLog"
    meson_args = std_meson_args.reject { |s| s["prefix"] } + %W[
      -Dxephyr=true
      -Dxf86bigfont=true
      -Dxcsecurity=true

      -Dbundle-id-prefix=#{Formula["xinit"].plist_name.chomp ".startx"}
      -Dbuilder_addr=#{tap.remote}
      -Dbuilder_string=#{tap.name}
    ]
    # macOS doesn't provide `authdes_cred` so `secure-rpc=false`
    # glamor needs GLX with `libepoxy` on macOS
    if OS.mac?
      meson_args += %w[
        -Dsecure-rpc=false
        -Dapple-applications-dir=libexec
      ]
    end

    # X11.app need startx etc. in the same directory
    destdir = buildpath/"dest"
    system "meson", "build", *meson_args
    system "meson", "compile", "-C", "build"
    system "meson", "install", "-C", "build", "--destdir", destdir
    prefix.install Dir["#{destdir}#{HOMEBREW_PREFIX}/*"]
    # follow https://github.com/XQuartz/XQuartz/blob/main/compile.sh#L955
    bin.install_symlink bin/"Xquartz" => "X" if OS.mac?

    if OS.linux?
      bin.install resource("xvfb-run")
      man1.install resource("xvfb-run.1")
    end
  end

  def caveats
    <<~EOS
      To launch X server, it is recommend to install xinit,
      especially on macOS, otherwise X11.app will not work:
        brew install xinit
      If cask xquartz is installed, this link may be helpful:
        https://www.xquartz.org/FAQs.html#want-another-x11app-server
    EOS
  end

  test do
    (testpath/"test.c").write <<~EOS
      #include <assert.h>
      #include <xcb/xcb.h>

      int main(void) {
        xcb_connection_t *connection = xcb_connect(NULL, NULL);
        int has_err = xcb_connection_has_error(connection);
        assert(has_err == 0);
        xcb_disconnect(connection);
        return 0;
      }
    EOS
    xcb = Formula["libxcb"]
    system ENV.cc, "./test.c", "-o", "test", "-I#{xcb.include}", "-L#{xcb.lib}", "-lxcb"

    fork do
      exec bin/"Xvfb", ":1"
    end
    ENV["DISPLAY"] = ":1"
    sleep 10
    system "./test"

    system bin/"xvfb-run", "./test" if OS.linux?
  end
end