class Samba < Formula
  # Samba can be used to share directories with the guest in QEMU user-mode
  # (SLIRP) networking with the `-net nic -net user,smb=/share/this/with/guest`
  # option. The shared folder appears in the guest as "\\10.0.2.4\qemu".
  desc "SMB/CIFS file, print, and login server for UNIX"
  homepage "https://www.samba.org/"
  url "https://download.samba.org/pub/samba/stable/samba-4.17.0.tar.gz"
  sha256 "04868ecda82fcbeda7b8bf519a2461a64d55c6e70efc6f6053b2fbba55f1823a"
  license "GPL-3.0-or-later"

  livecheck do
    url "https://www.samba.org/samba/download/"
    regex(/href=.*?samba[._-]v?(\d+(?:\.\d+)+)\.t/i)
  end

  bottle do
    sha256 arm64_monterey: "5b9ecb1dd87f8181fda6f1771b875993243ec8b125e7a62e88587fb9b6fb3840"
    sha256 arm64_big_sur:  "cf230dd73e8370f9ac1a9bf983680152403b5aa3f09272552ef17a2559d757b3"
    sha256 monterey:       "0029b15ccfaa0cef074d18ef91272d4aa9e97554fef8ad31f4e3f92aa21a602a"
    sha256 big_sur:        "a78c766b3cebf2825464ff66123b0eb39ca59b2f5e4b50a3c70d80aad4595113"
    sha256 catalina:       "a3929b67e6df6d6799ee137ca8931d4fff30f87d27d8d502c06c13957881fcf8"
  end

  # configure requires python3 binary to be present, even when --disable-python is set.
  depends_on "python@3.10" => :build
  depends_on "gnutls"
  depends_on "krb5"
  depends_on "libtasn1"
  depends_on "readline"

  uses_from_macos "bison" => :build
  uses_from_macos "flex" => :build
  uses_from_macos "perl" => :build
  uses_from_macos "libxcrypt"
  uses_from_macos "zlib"

  on_macos do
    depends_on "openssl@1.1"
  end

  resource "Parse::Yapp" do
    url "https://cpan.metacpan.org/authors/id/W/WB/WBRASWELL/Parse-Yapp-1.21.tar.gz"
    sha256 "3810e998308fba2e0f4f26043035032b027ce51ce5c8a52a8b8e340ca65f13e5"
  end

  def install
    # avoid `perl module "Parse::Yapp::Driver" not found` error on macOS 10.xx (not required on 11)
    if MacOS.version < :big_sur
      ENV.prepend_create_path "PERL5LIB", buildpath/"lib/perl5"
      ENV.prepend_path "PATH", buildpath/"bin"
      resource("Parse::Yapp").stage do
        system "perl", "Makefile.PL", "INSTALL_BASE=#{buildpath}"
        system "make"
        system "make", "install"
      end
    end
    ENV.append "LDFLAGS", "-Wl,-rpath,#{lib}/private" if OS.linux?
    system "./configure",
           "--disable-cephfs",
           "--disable-cups",
           "--disable-iprint",
           "--disable-glusterfs",
           "--disable-python",
           "--without-acl-support",
           "--without-ad-dc",
           "--without-ads",
           "--without-ldap",
           "--without-libarchive",
           "--without-json",
           "--without-pam",
           "--without-regedit",
           "--without-syslog",
           "--without-utmp",
           "--without-winbind",
           "--with-shared-modules=!vfs_snapper",
           "--with-system-mitkrb5",
           "--prefix=#{prefix}",
           "--sysconfdir=#{etc}",
           "--localstatedir=#{var}"
    system "make"
    system "make", "install"
    if OS.mac?
      # macOS has its own SMB daemon as /usr/sbin/smbd, so rename our smbd to samba-dot-org-smbd to avoid conflict.
      # samba-dot-org-smbd is used by qemu.rb .
      # Rename profiles as well to avoid conflicting with /usr/bin/profiles
      mv sbin/"smbd", sbin/"samba-dot-org-smbd"
      mv bin/"profiles", bin/"samba-dot-org-profiles"
    end
  end

  def caveats
    on_macos do
      <<~EOS
        To avoid conflicting with macOS system binaries, some files were installed with non-standard name:
        - smbd:     #{HOMEBREW_PREFIX}/sbin/samba-dot-org-smbd
        - profiles: #{HOMEBREW_PREFIX}/bin/samba-dot-org-profiles
      EOS
    end
  end

  test do
    smbd = if OS.mac?
      "#{sbin}/samba-dot-org-smbd"
    else
      "#{sbin}/smbd"
    end

    system smbd, "--build-options", "--configfile=/dev/null"
    system smbd, "--version"

    mkdir_p "samba/state"
    mkdir_p "samba/data"
    (testpath/"samba/data/hello").write "hello"

    # mimic smb.conf generated by qemu
    # https://github.com/qemu/qemu/blob/v6.0.0/net/slirp.c#L862
    (testpath/"smb.conf").write <<~EOS
      [global]
      private dir=#{testpath}/samba/state
      interfaces=127.0.0.1
      bind interfaces only=yes
      pid directory=#{testpath}/samba/state
      lock directory=#{testpath}/samba/state
      state directory=#{testpath}/samba/state
      cache directory=#{testpath}/samba/state
      ncalrpc dir=#{testpath}/samba/state/ncalrpc
      log file=#{testpath}/samba/state/log.smbd
      smb passwd file=#{testpath}/samba/state/smbpasswd
      security = user
      map to guest = Bad User
      load printers = no
      printing = bsd
      disable spoolss = yes
      usershare max shares = 0
      [test]
      path=#{testpath}/samba/data
      read only=no
      guest ok=yes
      force user=#{ENV["USER"]}
    EOS

    port = free_port
    spawn smbd, "--debug-stdout", "-F", "--configfile=smb.conf", "--port=#{port}", "--debuglevel=4", in: "/dev/null"

    sleep 5
    mkdir_p "got"
    system "smbclient", "-p", port.to_s, "-N", "//127.0.0.1/test", "-c", "get hello #{testpath}/got/hello"
    assert_equal "hello", (testpath/"got/hello").read
  end
end