defmodule NDCEx do
  require HTTPotion
  require Logger

  def request(method, params) do
    NDCEx.Message.Base.build_document(method, params[:ndc])
    |> rest_call_with_message(params[:rest])
  end

  def rest_call_with_message(xml, rest_config) do
    case HTTPotion.post(rest_config[:url], [body: xml, headers: rest_config[:headers], timeout: 30000 ]) do
      %HTTPotion.Response{body: body, headers: _headers, status_code: 200 } ->
        {:ok, scan body}
      %HTTPotion.Response{body: body, headers: _headers, status_code: _status_code } ->
        {:error, scan body}
      %HTTPotion.Response{status_code: 404} ->
        {:error, error_message("Request does not exist")}
      _ ->
        {:error, error_message("Unknown Error")}
    end
  end

  def scan(message) do
    #{ response, _ } = message |> String.to_char_list |> :xmerl_scan.string
    #response
    message
  end

  defp error_message(message) do
    scan "<error><message>#{message}</message></error>"
  end

  def get_mix_config(key) when is_atom(key) do
    Application.get_env(:ndc_ex_sdk, key)
  end
end