class Privoxy < Formula
  desc "Advanced filtering web proxy"
  homepage "https://www.privoxy.org/"
  url "https://downloads.sourceforge.net/project/ijbswa/Sources/3.0.32%20%28stable%29/privoxy-3.0.32-stable-src.tar.gz"
  sha256 "c61de4008c62445ec18f1f270407cbf2372eaba93beaccdc9e3238bb2defeed7"
  license "GPL-2.0-or-later"

  livecheck do
    url :stable
    regex(%r{url=.*?/privoxy[._-]v?(\d+(?:\.\d+)+)[._-]stable[._-]src\.t}i)
  end

  bottle do
    sha256 cellar: :any, arm64_big_sur: "c30372261661ab924bd6e3df9c86804d188dd130d0810e55e81aaa3431f924df"
    sha256 cellar: :any, big_sur:       "2edd70c7227801bd01df3b6ee756802daa63d8567c3d7d79bceb80233f18bbff"
    sha256 cellar: :any, catalina:      "b6b4b6fb269021a16685b7ee407ff8384699cf05910d3afbfac191afd6f1e588"
    sha256 cellar: :any, mojave:        "d7302bde6de73110eff0a8e86554414641d7a2eac7ebe4aff54956f7609acc5b"
  end

  depends_on "autoconf" => :build
  depends_on "automake" => :build
  depends_on "libtool" => :build
  depends_on "pcre"

  def install
    # Find Homebrew's libpcre
    ENV.append "LDFLAGS", "-L#{HOMEBREW_PREFIX}/lib"

    # No configure script is shipped with the source
    system "autoreconf", "-i"

    system "./configure", "--disable-debug",
                          "--disable-dependency-tracking",
                          "--prefix=#{prefix}",
                          "--sysconfdir=#{etc}/privoxy",
                          "--localstatedir=#{var}"
    system "make"
    system "make", "install"
  end

  plist_options manual: "privoxy #{HOMEBREW_PREFIX}/etc/privoxy/config"

  def plist
    <<~EOS
      <?xml version="1.0" encoding="UTF-8"?>
      <!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
      <plist version="1.0">
      <dict>
        <key>KeepAlive</key>
        <true/>
        <key>Label</key>
        <string>#{plist_name}</string>
        <key>WorkingDirectory</key>
        <string>#{var}</string>
        <key>ProgramArguments</key>
        <array>
          <string>#{sbin}/privoxy</string>
          <string>--no-daemon</string>
          <string>#{etc}/privoxy/config</string>
        </array>
        <key>RunAtLoad</key>
        <true/>
        <key>StandardErrorPath</key>
        <string>#{var}/log/privoxy/logfile</string>
      </dict>
      </plist>
    EOS
  end

  test do
    bind_address = "127.0.0.1:#{free_port}"
    (testpath/"config").write("listen-address #{bind_address}\n")
    begin
      server = IO.popen("#{sbin}/privoxy --no-daemon #{testpath}/config")
      sleep 1
      assert_match "HTTP/1.1 200 Connection established",
                   shell_output("/usr/bin/curl -I -x #{bind_address} https://github.com")
    ensure
      Process.kill("SIGINT", server.pid)
      Process.wait(server.pid)
    end
  end
end