# Copyright(c) 2015-2023 ACCESS CO., LTD. All rights reserved.

use Croma

defmodule Antikythera.Context do
  @moduledoc """
  Definition of `Antikythera.Context` struct which represents a context for an execution of gear code.

  Note that `gear_entry_point` is basically of type `{module, atom}`, it is `nil` during
  (1) `executor_pool_web_request/1` and (2) `no_route/1` error handler.
  """

  alias Antikythera.{Time, GearName, ContextId, ExecutorPool}

  defmodule GearEntryPoint do
    use Croma.SubtypeOfTuple, elem_modules: [Croma.Atom, Croma.Atom]
  end

  use Croma.Struct,
    recursive_new?: true,
    fields: [
      start_time: Time,
      context_id: ContextId,
      gear_name: GearName,
      executor_pool_id: Croma.TypeGen.nilable(ExecutorPool.Id),
      gear_entry_point: Croma.TypeGen.nilable(GearEntryPoint)
    ]
end