defmodule Fintech.Fio.Account do
  @moduledoc """
  FIO Banka - account.
  """

  @doc """
  Get token from parameter or config value.

  ## Examples

      iex>  Fintech.Fio.Account.token
      "abcdefghijklmnopqrstuvwxyz01234567890"

  """
  def token(token \\ nil) do
    token || Application.get_env(:fintech, Fintech.Fio.Account)[:token]
  end

  @doc """
  Get transactions of specified account.

  ## Examples

      iex>  Fintech.Fio.Account.transactions
      ""
  """
  def transactions(token \\ nil, from \\ "2007-01-01", to \\ Timex.format!(Timex.now, "%Y-%m-%d", :strftime)) do
    token = Fintech.Fio.Account.token(token)

    url = "https://www.fio.cz/ib_api/rest/periods/#{token}/#{from}/#{to}/transactions.json"

    case HTTPoison.get(url) do
      {:ok, res} ->
        case Poison.decode(res.body) do
          {:ok, ts} -> ts
          res -> res
        end
      _ -> nil
    end
  end
end