defmodule Nebulex.Adapters.Replicated.Supervisor do
  @moduledoc false

  use Supervisor

  alias Nebulex.Adapters.Replicated.{AntiEntropy, ClusterMonitor, Replicator}

  ## API

  @doc false
  def start_link(arg) do
    Supervisor.start_link(__MODULE__, arg)
  end

  ## Supervisor callback

  @impl true
  def init({cache, adapter_meta, primary_opts, buffer_opts}) do
    primary = cache.__primary__()

    children =
      [
        {primary, primary_opts},
        Supervisor.child_spec(
          {PartitionedBuffer.Map,
           Keyword.merge(buffer_opts,
             name: adapter_meta.inbox,
             processor: {Replicator, :process_inbox, [adapter_meta]}
           )},
          id: adapter_meta.inbox
        ),
        Supervisor.child_spec(
          {PartitionedBuffer.Map,
           Keyword.merge(buffer_opts,
             name: adapter_meta.outbox,
             processor: {Replicator, :process_outbox, [adapter_meta]}
           )},
          id: adapter_meta.outbox
        ),
        {ClusterMonitor, adapter_meta}
      ] ++ maybe_anti_entropy(adapter_meta)

    Supervisor.init(children, strategy: :rest_for_one)
  end

  defp maybe_anti_entropy(%{anti_entropy_interval: interval} = adapter_meta)
       when is_integer(interval) do
    [{AntiEntropy, adapter_meta}]
  end

  defp maybe_anti_entropy(_adapter_meta), do: []
end