defmodule DeeplEx.Configuration do
  @moduledoc false
  def api_key do
    case Application.get_env(:deepl_ex, :api_key, nil) do
      nil ->
        {:error, :api_key_variable_not_set}

      api_key ->
        {:ok, api_key}
    end
  end

  def tier(api_key) do
    case String.ends_with?(api_key, ":fx") do
      true ->
        :free

      _ ->
        :pro
    end
  end
end