class RuboCop::Cop::Money::ZeroMoney

def on_send(node)
  receiver, _ = *node
  money_zero(node) do |currency_arg|
    add_offense(node, message: format(MSG, currency: replacement_currency(currency_arg))) do |corrector|
      corrector.replace(
        node.loc.expression,
        "#{receiver.source}.new(0, #{replacement_currency(currency_arg)})",
      )
    end
  end
end

def replacement_currency(currency_arg)
  return currency_arg.first.source unless currency_arg.empty?
  return "'#{cop_config["ReplacementCurrency"]}'" if cop_config['ReplacementCurrency']
  'Money::NULL_CURRENCY'
end