class PcapDnsproxy < Formula
  desc "Powerful DNS proxy designed to anti DNS spoofing"
  homepage "https://github.com/chengr28/Pcap_DNSProxy"
  url "https://github.com/chengr28/Pcap_DNSProxy/archive/v0.4.7.8.tar.gz"
  sha256 "57af22d8688cd23e74e5eee0b716ea0c8e68671d3be34ef993df7b8303aa73d0"
  head "https://github.com/chengr28/Pcap_DNSProxy.git"

  bottle do
    cellar :any_skip_relocation
    rebuild 1
    sha256 "64c03c2dc934b28302f9166aa601b8b7207ab64d58e48cbcf783c252ac8a0826" => :sierra
    sha256 "39e0d718b01b3543da42e669ab66cbc99619298ce4d050610c4e0e3da039bdb0" => :el_capitan
    sha256 "c5838936aed4df35a34abd7e472454e8b13c0b11ecf4410a69bff6907ab0c7b2" => :yosemite
  end

  depends_on :macos => :yosemite
  depends_on :xcode => :build
  depends_on "libsodium"

  def install
    (buildpath/"Source/LibSodium").install_symlink Formula["libsodium"].opt_lib/"libsodium.a" => "LibSodium_Mac.a"
    xcodebuild "-project", "./Source/Pcap_DNSProxy.xcodeproj", "-target", "Pcap_DNSProxy", "-configuration", "Release", "SYMROOT=build"
    bin.install "Source/build/Release/Pcap_DNSProxy"
    (etc/"pcap_DNSproxy").install Dir["Source/ExampleConfig/*.{ini,txt}"]
    prefix.install "Source/ExampleConfig/pcap_dnsproxy.service.plist"
  end

  plist_options :startup => true, :manual => "sudo #{HOMEBREW_PREFIX}/opt/pcap_dnsproxy/bin/Pcap_DNSProxy -c #{HOMEBREW_PREFIX}/etc/pcap_DNSproxy/"

  test do
    (testpath/"pcap_DNSproxy").mkpath
    cp Dir[etc/"pcap_DNSproxy/*"], testpath/"pcap_DNSproxy/"

    inreplace testpath/"pcap_DNSproxy/Config.ini" do |s|
      s.gsub! /^Direct Request.*/, "Direct Request = IPv4 + IPv6"
      s.gsub! /^Operation Mode.*/, "Operation Mode = Proxy"
      s.gsub! /^Listen Port.*/, "Listen Port = 9999"
    end

    pid = fork { exec bin/"Pcap_DNSProxy", "-c", testpath/"pcap_DNSproxy/" }
    begin
      system "dig", "google.com", "@127.0.0.1", "-p", "9999", "+short"
    ensure
      Process.kill 9, pid
      Process.wait pid
    end
  end
end