# AGPLv3 sysmocom s.f.m.c. GmbH

module Spree
  class Calculator::SysmocomMailValueCalculator < Calculator

    def self.description
      I18n.t(:sysmocom_mail_value_based)
    end

    def total_value_no_tax(o)
        item_total = o.line_items.map(&:amount).sum
        item_total
    end

    def extract_iso_code(o)
        if o.kind_of?(Spree::Shipment)
            return o.address.country.iso
        end
        return o.ship_address.country.iso
    end

    def compute(object)
        # This could be more than an order but not right now
        shipping_value = total_value_no_tax(object)
        iso_code = extract_iso_code(object)

        base = 6.5
        if iso_code == 'DE'
          base = 4.6
        end

        # We need to add insurance..
        if shipping_value < 30
          # Plain registered letter
          return base
        elsif shipping_value > 300
          # Stops making sense to send it..
          return 200
        end

        return base + (((shipping_value.round / 100) + 1) * 1.5)
    end

  end
end