class Etcd < Formula
  desc "Key value store for shared configuration and service discovery"
  homepage "https://github.com/etcd-io/etcd"
  url "https://github.com/etcd-io/etcd.git",
    :tag      => "v3.4.3",
    :revision => "3cf2f69b5738fb702ba1a935590f36b52b18979b"
  head "https://github.com/etcd-io/etcd.git"

  bottle do
    cellar :any_skip_relocation
    sha256 "9ec3f9d7548b078452d2c669521c83a79173178ee84d5a3963d5ecd1ee79ec21" => :catalina
    sha256 "2247b5b279eb6ba017c8fa079a0628571cf62444b8c22849ac426ad0ce800221" => :mojave
    sha256 "e9ab53a559f0a73840b1c2a7112e7cc2192055c9904977a6006f70962eacc335" => :high_sierra
  end

  depends_on "go" => :build

  def install
    ENV["GOPATH"] = buildpath

    dir = buildpath/"src/github.com/etcd-io/etcd"
    dir.install buildpath.children

    cd dir do
      system "go", "build", "-ldflags", "-X main.version=#{version}", "-o", bin/"etcd"
      system "go", "build", "-ldflags", "-X main.version=#{version}", "-o", bin/"etcdctl", "etcdctl/main.go"
      prefix.install_metafiles
    end
  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
    test_string = "Hello from brew test!"
    etcd_pid = fork do
      exec bin/"etcd",
        "--enable-v2", # enable etcd v2 client support
        "--force-new-cluster",
        "--logger=zap", # default logger (`capnslog`) to be deprecated in v3.5
        "--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"))

    assert_equal "OK\n", shell_output("#{bin}/etcdctl put foo bar")
    assert_equal "foo\nbar\n", shell_output("#{bin}/etcdctl get foo 2>&1")
  ensure
    # clean up the etcd process before we leave
    Process.kill("HUP", etcd_pid)
  end
end