defmodule Stripi do
  @moduledoc """
  Stripi is yet another Stripe Api written in elixir.
  """
  def request(request_function, parameters) do
    request_function
    |> :erlang.apply(parameters)
    |> response()
  end

  defp response({:ok, resp = %{status: status}}) when status in 200..299, do: {:ok, resp}

  defp response({:ok, resp}), do: {:error, resp}

  defp response(error), do: error

  def api do
    quote do
      use Tesla, except: ~w(head options)a
      @version Stripi.MixProject.project()[:version]

      plug(Tesla.Middleware.Tuples)

      plug(Tesla.Middleware.Headers, %{
        "Authorization" => "Bearer #{Application.get_env(:stripi, :secret_key)}",
        "User-Agent" => "Stripi v#{@version}",
        "Content-Type" => "application/x-www-form-urlencoded"
      })

      plug(Tesla.Middleware.FormUrlencoded)
      plug(Tesla.Middleware.DecodeJson)
    end
  end

  defmacro __using__(which) when is_atom(which), do: apply(__MODULE__, which, [])
end