defmodule Runbox.Runtime.RuntimeInstruction do
  @moduledoc """
  Struct produced by scenario representing instruction for runtime.
  """

  alias __MODULE__, as: RuntimeInstruction

  defstruct body: nil

  defmodule Timeout do
    @moduledoc """
    Instruction to register unit timeout.
    """

    alias Toolbox.Message, as: Msg

    defstruct unit_id: nil, timeout_message: nil

    @typedoc "Struct representing unit timeout registration."
    @type t :: %Timeout{timeout_message: %Msg{}}
  end

  @typedoc "Struct produced by scenario representing instruction for runtime."
  @type t :: %RuntimeInstruction{body: Timeout.t()}

  @doc """
  Creates runtime instruction to register timeout message.
  """
  def register_timeout(timeout_message) do
    %RuntimeInstruction{body: %Timeout{timeout_message: timeout_message}}
  end
end