module Trade
  module Model::Refund::PaypalRefund

    def do_refund(params = {})
      return unless can_refund?
      sale = PayPal::SDK::REST::DataTypes::Sale.find(payment.payment_uuid)

      params = params.merge({
        amount: {
          total: self.total_amount.to_s(:rounded, precision: 2),
          currency: self.currency.upcase
        }
      })
      result = sale.refund(params)

      if result.success?
        self.state = 'completed'
      elsif result.error
        self.reason = result.error['message']
        self.state = 'failed'
      end

      result
    end

  end
end