module Invoice::BookKeeping
  extend ActiveSupport::Concern

  def as_directo_json
    invoice = ActiveSupport::JSON.decode(ActiveSupport::JSON.encode(self))
    invoice['customer'] = compose_directo_customer
    invoice['issue_date'] = issue_date.strftime('%Y-%m-%d')
    invoice['transaction_date'] = account_activity
                                  .bank_transaction&.paid_at&.strftime('%Y-%m-%d')
    invoice['language'] = buyer.language == 'en' ? 'ENG' : ''
    invoice['invoice_lines'] = compose_directo_product

    invoice
  end

  def compose_directo_product
    [{ 'product_id': Setting.directo_receipt_product_name, 'description': order,
       'quantity': 1, 'price': ActionController::Base.helpers.number_with_precision(
         subtotal, precision: 2, separator: '.'
       ) }].as_json
  end

  def compose_directo_customer
    {
      'code': buyer.accounting_customer_code,
      'destination': buyer_country_code,
      'vat_reg_no': buyer_vat_no,
    }.as_json
  end
end