tesourex

defmodule Tesourex do
  alias HTTPoison.Response

  def quotes(source \\ "html", http_client \\ HTTPoison) do
    url_for(source)
    |> http_client.get
    |> handle_response
    |> parser_for(source).parse
  end

  defp url_for("html"), do: "http://www.tesouro.fazenda.gov.br/tesouro-direto-precos-e-taxas-dos-titulos"
  defp url_for("csv"), do: "http://www.tesourotransparente.gov.br/ckan/dataset/df56aa42-484a-4a59-8184-7676580c81e3/resource/796d2059-14e9-44e3-80c9-2d9e30b405c1/download/PrecoTaxaTesouroDireto.csv"

  defp parser_for("html"), do: Tesourex.HTML
  defp parser_for("csv"), do: Tesourex.CSV

  defp handle_response({:ok, %Response{status_code: 200, body: body}}) do
    body
  end

  defp handle_response(_) do
    ""
  end
end