defmodule Extreme.System.CommandSup do
  use Supervisor
  alias Extreme.System, as: ExSys

  def start_link(configuration_module, prefix, extreme_settings \\ nil),
    do:
      Supervisor.start_link(__MODULE__, {configuration_module, prefix, extreme_settings},
        name: name(prefix)
      )

  def init({configuration_module, prefix, extreme_settings}) do
    children =
      if extreme_settings do
        [
          worker(Extreme, [extreme_settings, [name: extreme_name(prefix)]]),
          worker(ExSys.EventStore, [
            configuration_module,
            extreme_name(prefix),
            [name: ExSys.EventStore.name(prefix)]
          ])
        ]
      else
        []
      end

    children = [supervisor(configuration_module, [prefix]) | children]
    supervise(children, strategy: :one_for_one)
  end

  defp name(prefix),
    do: "#{prefix |> to_string()}.CommandSup" |> String.to_atom()

  defp extreme_name(prefix),
    do: "#{prefix |> to_string()}.Extreme" |> String.to_atom()
end