<?php
class Orange35_Rewrite_Model_Sales_Quote extends Mage_Sales_Model_Quote
{

    public function validateMinimumAmount($multishipping = false)
    {
        $storeId = $this->getStoreId();
        $minOrderActive = Mage::getStoreConfigFlag('sales/minimum_order/active', $storeId);
        $minOrderMulti  = Mage::getStoreConfigFlag('sales/minimum_order/multi_address', $storeId);
        $minAmount      = Mage::getStoreConfig('sales/minimum_order/amount', $storeId);
        //$minAmountGroup      = Mage::getStoreConfig('sales/min_amount_per_customer_group/min_amount_group', $storeId);
        $minAmountGroupId      = Mage::getStoreConfig('sales/minimum_order/customer_group', $storeId);
        $CustomerStatus = Mage::getSingleton('customer/session')->isLoggedIn();
        $group = Mage::getSingleton('customer/session')->getCustomerGroupId();

        if (!$minOrderActive) {
            return true;
        }
        else{
            if($minAmountGroupId!=""&&!($CustomerStatus&&$group==$minAmountGroupId)){
                if(!($CustomerStatus&&$group==$minAmountGroupId)){
                    return true;
                }
            }
        }

        $addresses = $this->getAllAddresses();

        if ($multishipping) {
            if ($minOrderMulti) {
                foreach ($addresses as $address) {
                    foreach ($address->getQuote()->getItemsCollection() as $item) {
                        $amount = $item->getBaseRowTotal() - $item->getBaseDiscountAmount();
                        if ($amount < $minAmount) {
                            return false;
                        }
                    }
                }
            } else {
                $baseTotal = 0;
                foreach ($addresses as $address) {
                    /* @var $address Mage_Sales_Model_Quote_Address */
                    $baseTotal += $address->getBaseSubtotalWithDiscount();
                }
                if ($baseTotal < $minAmount) {
                    return false;
                }
            }
        } else {
            foreach ($addresses as $address) {
                /* @var $address Mage_Sales_Model_Quote_Address */
                if (!$address->validateMinimumAmount()) {
                    return false;
                }
            }
        }
        return true;
    }


}