event_bus_metrics

defmodule EventBus.Metrics.Application do
  # See https://hexdocs.pm/elixir/Application.html
  # for more information on OTP Applications
  @moduledoc false

  use Application
  alias EventBus.Metrics.{Config, Counter}
  alias EventBus.Metrics.Ticker.{Topic, Topics, Subscribers}
  alias EventBus.Metrics.Web.ServerSupervisor

  def start(_type, _args) do
    import Supervisor.Spec, warn: false

    children =
      [
        worker(Counter, [], id: make_ref(), restart: :permanent),
        worker(Topic, [], id: make_ref(), restart: :permanent),
        worker(Topics, [], id: make_ref(), restart: :permanent),
        worker(Subscribers, [], id: make_ref(), restart: :permanent)
      ] ++ http_server_supervisor()

    # See https://hexdocs.pm/elixir/Supervisor.html
    # for other strategies and supported options
    opts = [strategy: :one_for_one, name: EventBus.Metrics.Supervisor]
    link = Supervisor.start_link(children, opts)

    EventBus.subscribe({EventBus.Metrics, [".*"]})

    link
  end

  defp http_server_supervisor do
    import Supervisor.Spec, warn: false

    case Config.http_server?() do
      true -> [supervisor(ServerSupervisor, [])]
      false -> []
    end
  end
end