## This Source Code Form is subject to the terms of the Mozilla Public
## License, v. 2.0. If a copy of the MPL was not distributed with this
## file, You can obtain one at https://mozilla.org/MPL/2.0/.
##
## Copyright (c) 2007-2023 VMware, Inc. or its affiliates.  All rights reserved.

defmodule RabbitMQ.CLI.Diagnostics.Commands.DiscoverPeersCommand do
  @behaviour RabbitMQ.CLI.CommandBehaviour

  use RabbitMQ.CLI.Core.AcceptsDefaultSwitchesAndTimeout
  use RabbitMQ.CLI.Core.MergesNoDefaults
  use RabbitMQ.CLI.Core.AcceptsNoPositionalArguments
  use RabbitMQ.CLI.Core.RequiresRabbitAppRunning

  def run([], %{node: node_name, timeout: timeout}) do
    :rabbit_misc.rpc_call(node_name, :rabbit_peer_discovery, :discover_cluster_nodes, [], timeout)
  end

  def output({:ok, {[], _}}, _options) do
    {:ok, "No peers discovered"}
  end

  def output({:ok, {nodes, _}}, _options) do
    {:ok, nodes}
  end

  use RabbitMQ.CLI.DefaultOutput

  def help_section(), do: :observability_and_health_checks

  def description(), do: "Performs peer discovery and lists discovered nodes, if any"

  def usage, do: "discover_peers"

  def banner(_, _), do: "Discovering peers nodes ..."
end
