defmodule Sumup.Customer do
  @moduledoc "A vaulted SumUp customer, used to store payment instruments for later reuse."

  @type personal_details :: %{
          optional(:first_name) => String.t(),
          optional(:last_name) => String.t(),
          optional(:email) => String.t(),
          optional(:phone) => String.t(),
          optional(:birth_date) => String.t(),
          optional(:tax_id) => String.t(),
          optional(:address) => map()
        }

  @type t :: %__MODULE__{
          customer_id: String.t(),
          personal_details: personal_details(),
          raw: map()
        }

  defstruct [:customer_id, personal_details: %{}, raw: %{}]

  @doc false
  @spec from_json(map()) :: t()
  def from_json(json) when is_map(json) do
    %__MODULE__{
      customer_id: json["customer_id"],
      personal_details: atomize_shallow(json["personal_details"] || %{}),
      raw: json
    }
  end

  defp atomize_shallow(map) do
    Map.new(map, fn {k, v} -> {String.to_atom(k), v} end)
  end
end