defmodule Spreedly.RequestBody do
  @moduledoc false

  def add_gateway_body(gateway_type, gateway_params) do
    %{
      gateway:
        Map.merge(
          %{gateway_type: gateway_type},
          gateway_params
        )
    }
    |> Poison.encode!()
  end

  def add_receiver_body(receiver_type, options) do
    %{receiver: receiver_details(receiver_type, options)}
    |> Poison.encode!()
  end

  def add_credit_card_body(options) do
    %{
      payment_method: %{
        email: options[:email],
        retained: options[:retained],
        data: options[:data],
        credit_card: credit_card_fields(options)
      }
    }
    |> Poison.encode!()
  end

  def auth_or_purchase_body(payment_method_token, amount, currency_code, options) do
    %{
      transaction:
        %{
          payment_method_token: payment_method_token,
          amount: amount,
          currency_code: currency_code
        }
        |> Map.merge(Map.new(options))
    }
    |> Poison.encode!()
  end

  def credit_body(amount, currency_code) do
    %{
      transaction: %{
        amount: amount,
        currency_code: currency_code
      }
    }
    |> Poison.encode!()
  end

  def verify_body(payment_method_token, currency_code, options) do
    %{
      transaction:
        %{
          payment_method_token: payment_method_token,
          currency_code: currency_code
        }
        |> Map.merge(Map.new(options))
    }
    |> Poison.encode!()
  end

  def store_payment_method_body(payment_method_token) do
    %{
      transaction: %{
        payment_method_token: payment_method_token
      }
    }
    |> Poison.encode!()
  end

  defp credit_card_fields(options) do
    ~w(first_name last_name full_name month year number verification_value
       address1 address2 city state zip country phone_number company)a
    |> Keyword.new(fn x -> {x, options[x]} end)
    |> Map.new()
  end

  defp receiver_details(:test, options) do
    %{receiver_type: :test, hostnames: options[:hostnames]}
  end

  defp receiver_details(receiver_type, _options) do
    %{receiver_type: receiver_type}
  end
end