majic

defmodule Majic.Config do
  @moduledoc false
  @otp_app Mix.Project.config()[:app]
  @executable_name "libmagic_port"
  @startup_timeout 1_000
  @process_timeout 30_000
  @recycle_threshold :infinity

  def default_process_timeout, do: @process_timeout

  def get_port_name do
    {:spawn_executable, to_charlist(get_executable_name())}
  end

  def get_port_options(_options) do
    [:use_stdio, :binary, :exit_status, {:packet, 2}]
  end

  def get_startup_timeout(options) do
    get_value(options, :startup_timeout, @startup_timeout)
  end

  def get_process_timeout(options) do
    get_value(options, :process_timeout, @process_timeout)
  end

  def get_recycle_threshold(options) do
    get_value(options, :recycle_threshold, @recycle_threshold)
  end

  defp get_executable_name do
    Path.join(:code.priv_dir(@otp_app), @executable_name)
  end

  defp get(options, key, default) do
    Keyword.get(options, key, default)
  end

  defp get_value(options, key, default) do
    case get(options, key, default) do
      value when is_integer(value) and value > 0 -> value
      :infinity -> :infinity
      _ -> raise ArgumentError, message: "Invalid #{key}"
    end
  end
end