class Etcd < Formula
  desc "Key value store for shared configuration and service discovery"
  homepage "https://github.com/coreos/etcd"
  url "https://github.com/coreos/etcd/archive/v3.3.1.tar.gz"
  sha256 "b00e0945bf4a99d88501b842b398c76d82ec45d02a00d7c203884b1ae3b75187"
  head "https://github.com/coreos/etcd.git"

  bottle do
    cellar :any_skip_relocation
    sha256 "7f03c45e8651da635c99b1ab4291913c8d8a593e538c1be83f34092bc647616e" => :high_sierra
    sha256 "41538071fb2b45d2adb70e5ebb89a14aae017ae6d4dc8256084fe271f5e16734" => :sierra
    sha256 "0e5f5778b62e796b35f9fa225f254aa29ebf2b8dade6148f6ec0bff17244145c" => :el_capitan
  end

  depends_on "go" => :build

  def install
    ENV["GOPATH"] = buildpath
    mkdir_p "src/github.com/coreos"
    ln_s buildpath, "src/github.com/coreos/etcd"
    system "./build"
    bin.install "bin/etcd"
    bin.install "bin/etcdctl"
  end

  plist_options :manual => "etcd"

  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>
        <dict>
          <key>SuccessfulExit</key>
          <false/>
        </dict>
        <key>Label</key>
        <string>#{plist_name}</string>
        <key>ProgramArguments</key>
        <array>
          <string>#{opt_bin}/etcd</string>
        </array>
        <key>RunAtLoad</key>
        <true/>
        <key>WorkingDirectory</key>
        <string>#{var}</string>
      </dict>
    </plist>
    EOS
  end

  test do
    begin
      test_string = "Hello from brew test!"
      etcd_pid = fork do
        exec bin/"etcd", "--force-new-cluster", "--data-dir=#{testpath}"
      end
      # sleep to let etcd get its wits about it
      sleep 10
      etcd_uri = "http://127.0.0.1:2379/v2/keys/brew_test"
      system "curl", "--silent", "-L", etcd_uri, "-XPUT", "-d", "value=#{test_string}"
      curl_output = shell_output("curl --silent -L #{etcd_uri}")
      response_hash = JSON.parse(curl_output)
      assert_match(test_string, response_hash.fetch("node").fetch("value"))
    ensure
      # clean up the etcd process before we leave
      Process.kill("HUP", etcd_pid)
    end
  end
end