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:      "v3.4.13",
    revision: "ae9734ed278b7a1a7dfc82e800471ebbf9fce56f"
  license "Apache-2.0"
  head "https://github.com/etcd-io/etcd.git"

  bottle do
    cellar :any_skip_relocation
    sha256 "ff3603b21a38568e3a2ae9964cdacbb5adfdc8b094c98b8e0423d2e4fb82c8ca" => :catalina
    sha256 "8c3f78a11d36c7c934deb4faa1007645d8cdb8293b04242e92e536551752a805" => :mojave
    sha256 "642a6b2ef0dbfabad3645e512c507aca25fa777a84e1790f7d18f8f63a2c637d" => :high_sierra
  end

  depends_on "go" => :build

  def install
    # Fix vendored deps issue (remove this in the next release)
    system "go", "mod", "vendor"

    system "go", "build", "-mod=vendor", "-ldflags", "-s -w -X main.version=#{version}", "-trimpath", "-o",
      bin/"etcd"
    system "go", "build", "-mod=vendor", "-ldflags", "-s -w -X main.version=#{version}", "-trimpath", "-o",
      bin/"etcdctl", "etcdctl/main.go"
    prefix.install_metafiles
  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