class Stunnel < Formula
  desc "SSL tunneling program"
  homepage "https://www.stunnel.org/"
  url "https://www.stunnel.org/downloads/stunnel-5.56.tar.gz"
  sha256 "7384bfb356b9a89ddfee70b5ca494d187605bb516b4fff597e167f97e2236b22"

  bottle do
    cellar :any
    sha256 "90d65b410dfcabbc5d4b586449ae92b23cbe3f9e087a7075ec66b81807c17b7b" => :catalina
    sha256 "61d66e0c5c5d411becd8b7d1f9ba913c1a15b9d15ec70e1253ca2e7fbdb0e516" => :mojave
    sha256 "22548c4f8f3a15ebe6cd79aa2162dc7af8abaacf3e94d32d7cc8afc8f2049318" => :high_sierra
  end

  depends_on "openssl@1.1"

  def install
    system "./configure", "--disable-dependency-tracking",
                          "--disable-silent-rules",
                          "--prefix=#{prefix}",
                          "--sysconfdir=#{etc}",
                          "--localstatedir=#{var}",
                          "--mandir=#{man}",
                          "--disable-libwrap",
                          "--disable-systemd",
                          "--with-ssl=#{Formula["openssl@1.1"].opt_prefix}"
    system "make", "install"

    # This programmatically recreates pem creation used in the tools Makefile
    # which would usually require interactivity to resolve.
    cd "tools" do
      args = %w[req -new -x509 -days 365 -rand stunnel.rnd -config
                openssl.cnf -out stunnel.pem -keyout stunnel.pem -sha256 -subj
                /C=PL/ST=Mazovia\ Province/L=Warsaw/O=Stunnel\ Developers/OU=Provisional\ CA/CN=localhost/]
      system "dd", "if=/dev/urandom", "of=stunnel.rnd", "bs=256", "count=1"
      system "#{Formula["openssl@1.1"].opt_bin}/openssl", *args
      chmod 0600, "stunnel.pem"
      (etc/"stunnel").install "stunnel.pem"
    end
  end

  def caveats
    <<~EOS
      A bogus SSL server certificate has been installed to:
        #{etc}/stunnel/stunnel.pem

      This certificate will be used by default unless a config file says otherwise!
      Stunnel will refuse to load the sample configuration file if left unedited.

      In your stunnel configuration, specify a SSL certificate with
      the "cert =" option for each service.

      To use Stunnel with Homebrew services, make sure to set "foreground = yes" in
      your Stunnel configuration.
    EOS
  end

  plist_options :manual => "stunnel"

  def plist; <<~EOS
    <?xml version="1.0" encoding="UTF-8"?>
    <!DOCTYPE plist PUBLIC "-//Apple Computer//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
    <plist version="1.0">
    <dict>
      <key>Label</key>
      <string>#{plist_name}</string>
      <key>ProgramArguments</key>
      <array>
        <string>#{opt_bin}/stunnel</string>
      </array>
      <key>RunAtLoad</key>
      <true/>
    </dict>
    </plist>
  EOS
  end

  test do
    (testpath/"tstunnel.conf").write <<~EOS
      cert = #{etc}/stunnel/stunnel.pem

      setuid = nobody
      setgid = nobody

      [pop3s]
      accept  = 995
      connect = 110

      [imaps]
      accept  = 993
      connect = 143
    EOS

    assert_match "successful", pipe_output("#{bin}/stunnel #{testpath}/tstunnel.conf 2>&1")
  end
end