defmodule ALF.Components.Tbd do
  use ALF.Components.Basic

  defstruct name: nil,
            count: 1,
            number: 0,
            pipe_module: nil,
            pipeline_module: nil,
            module: nil,
            function: nil,
            opts: %{},
            pid: nil,
            subscribe_to: [],
            subscribers: [],
            telemetry_enabled: false

  alias ALF.DSLError

  def start_link(%__MODULE__{} = state) do
    GenStage.start_link(__MODULE__, state)
  end

  def init(state) do
    state = %{state | pid: self()}

    {:producer_consumer, state, subscribe_to: state.subscribe_to}
  end

  def handle_events([%IP{} = ip], _from, state) do
    ip = %{ip | history: [{{state.name, state.number}, ip.event} | ip.history]}
    {:noreply, [ip], state}
  end

  def validate_name(atom) do
    unless is_atom(atom) do
      raise DSLError, "Tbd name must be an atom: #{inspect(atom)}"
    end
  end
end