defmodule Flaggy do
  @moduledoc """
  Documentation for `Flaggy`.
  """

  @doc false
  defmacro __using__(opts) do
    quote do
      @ttl unquote(fetch_option(opts, :ttl))
    end
  end

  defmacro get(key) do
    quote do
      flag = Flaggy.Adapter.get(unquote(key))
      elem(flag, 1)
    end
  end

  defp fetch_option(opts, opt_key) do
    case Keyword.fetch(opts, opt_key) do
      {:ok, value} -> value
      :error -> nil
    end
  end
end