defmodule BettyGql.Functions.LoginFunctions do
  @moduledoc """
  This module regulates the functions needed to authenticate the user, and extract the needed data
  """

  # Public Functions

  @doc """
  Gets the variables form the config. A more detailed explanation can be found here: https://github.com/JoeriDijkstra/betty_gql
  """
  def get_login_variables do
    {build_app_url(), get_credentials()}
  end

  @doc """
  Sets the authentication config
  """
  def authenticate(resp) do
    jwt = extract_jwt_token(resp)
    case Neuron.Config.set(headers: [authorization: "Bearer #{jwt}"]) do
      :ok -> jwt
      {:error, message} -> message
    end
  end

  def extract_jwt_token(response) do
    Map.get(response, :body)["data"]["login"]["jwtToken"]
  end

  # Private Functions
  defp get_credentials do
    username = Application.fetch_env!(:betty_gql, :username)
    password = Application.fetch_env!(:betty_gql, :password)
    auth_profile = Application.fetch_env!(:betty_gql, :authentication_profile_uuid)
    %{"username" => username, "password" => password, "auth_profile" => auth_profile}
  end

  defp build_app_url do
      app_identifier = Application.fetch_env!(:betty_gql, :app_identifier)
      app_uuid = Application.fetch_env!(:betty_gql, :app_uuid)
      "https://#{app_identifier}.betty.app/api/runtime/#{app_uuid}"
  end
end