class Packetbeat < Formula
  desc "Lightweight Shipper for Network Data"
  homepage "https://www.elastic.co/products/beats/packetbeat"
  url "https://github.com/elastic/beats/archive/v6.2.4.tar.gz"
  sha256 "87d863cf55863329ca80e76c3d813af2960492f4834d4fea919f1d4b49aaf699"
  head "https://github.com/elastic/beats.git"

  bottle do
    cellar :any_skip_relocation
    sha256 "c49e265502b3be8c83ec949e1c25781ca2560a2956fe4bdcb462dd871c35a4b7" => :high_sierra
    sha256 "db873b1e0f6344a316b234402f8994b12eef03eb4deb662b50277e6eabea8053" => :sierra
    sha256 "a655b33e3a1602a68ae3e2954cb03bd3b3f2d17954a68b9df2e48eb990c8c140" => :el_capitan
  end

  depends_on "go" => :build
  depends_on "python@2" => :build

  resource "virtualenv" do
    url "https://files.pythonhosted.org/packages/b1/72/2d70c5a1de409ceb3a27ff2ec007ecdd5cc52239e7c74990e32af57affe9/virtualenv-15.2.0.tar.gz"
    sha256 "1d7e241b431e7afce47e77f8843a276f652699d1fa4f93b9d8ce0076fd7b0b54"
  end

  def install
    ENV["GOPATH"] = buildpath
    (buildpath/"src/github.com/elastic/beats").install buildpath.children

    ENV.prepend_create_path "PYTHONPATH", buildpath/"vendor/lib/python2.7/site-packages"

    resource("virtualenv").stage do
      system "python", *Language::Python.setup_install_args(buildpath/"vendor")
    end

    ENV.prepend_path "PATH", buildpath/"vendor/bin"

    cd "src/github.com/elastic/beats/packetbeat" do
      system "make"
      # prevent downloading binary wheels during python setup
      system "make", "PIP_INSTALL_COMMANDS=--no-binary :all", "python-env"
      system "make", "DEV_OS=darwin", "update"

      inreplace "packetbeat.yml", "packetbeat.interfaces.device: any", "packetbeat.interfaces.device: en0"

      (etc/"packetbeat").install Dir["packetbeat.*", "fields.yml"]
      (libexec/"bin").install "packetbeat"
      prefix.install "_meta/kibana"
    end

    prefix.install_metafiles buildpath/"src/github.com/elastic/beats"

    (bin/"packetbeat").write <<~EOS
      #!/bin/sh
      exec #{libexec}/bin/packetbeat \
        --path.config #{etc}/packetbeat \
        --path.data #{var}/lib/packetbeat \
        --path.home #{prefix} \
        --path.logs #{var}/log/packetbeat \
        "$@"
    EOS
  end

  plist_options :manual => "packetbeat"

  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>Program</key>
        <string>#{opt_bin}/packetbeat</string>
        <key>RunAtLoad</key>
        <true/>
      </dict>
    </plist>
  EOS
  end

  test do
    system "#{bin}/packetbeat", "devices"
  end
end