<?php
/**
 * Magento
 *
 * NOTICE OF LICENSE
 *
 * This source file is subject to the Open Software License (OSL 3.0)
 * that is bundled with this package in the file LICENSE.txt.
 * It is also available through the world-wide-web at this URL:
 * http://opensource.org/licenses/osl-3.0.php
 * If you did not receive a copy of the license and are unable to
 * obtain it through the world-wide-web, please send an email
 * to license@magentocommerce.com so we can send you a copy immediately.
 *
 * DISCLAIMER
 *
 * Do not edit or add to this file if you wish to upgrade Magento to newer
 * versions in the future. If you wish to customize Magento for your
 * needs please refer to http://www.magentocommerce.com for more information.
 *
 * @category    Mage
 * @package     Mage_SalesRule
 * @copyright   Copyright (c) 2013 Magento Inc. (http://www.magentocommerce.com)
 * @license     http://opensource.org/licenses/osl-3.0.php  Open Software License (OSL 3.0)
 */

/**
 * SalesRule Model Observer
 *
 * @category    Mage
 * @package     Mage_SalesRule
 * @author      Magento Core Team <core@magentocommerce.com>
 */
class Mage_SalesRule_Model_Observer
{

    /**
     * Sales Rule Validator
     *
     * @var Mage_SalesRule_Model_Validator
     */
    protected $_validator;

    /**
     * Get quote item validator/processor object
     *
     * @deprecated
     * @param   Varien_Event $event
     * @return  Mage_SalesRule_Model_Validator
     */
    public function getValidator($event)
    {
        if (!$this->_validator) {
            $this->_validator = Mage::getModel('salesrule/validator')
                ->init($event->getWebsiteId(), $event->getCustomerGroupId(), $event->getCouponCode());
        }
        return $this->_validator;
    }

    /**
     * Process quote item (apply discount to item)
     *
     * @deprecated process call movet to total model
     * @param Varien_Event_Observer $observer
     */
    public function sales_quote_address_discount_item($observer)
    {
        $this->getValidator($observer->getEvent())
            ->process($observer->getEvent()->getItem());
    }

    /**
     * Registered callback: called after an order is placed
     *
     * @param Varien_Event_Observer $observer
     */
    public function sales_order_afterPlace($observer)
    {
        $order = $observer->getEvent()->getOrder();

        if (!$order) {
            return $this;
        }

        // lookup rule ids
        $ruleIds = explode(',', $order->getAppliedRuleIds());
        $ruleIds = array_unique($ruleIds);

        $ruleCustomer = null;
        $customerId = $order->getCustomerId();

        // use each rule (and apply to customer, if applicable)
        if ($order->getDiscountAmount() != 0) {
            foreach ($ruleIds as $ruleId) {
                if (!$ruleId) {
                    continue;
                }
                $rule = Mage::getModel('salesrule/rule');
                $rule->load($ruleId);
                if ($rule->getId()) {
                    $rule->setTimesUsed($rule->getTimesUsed() + 1);
                    $rule->save();

                    if ($customerId) {
                        $ruleCustomer = Mage::getModel('salesrule/rule_customer');
                        $ruleCustomer->loadByCustomerRule($customerId, $ruleId);

                        if ($ruleCustomer->getId()) {
                            $ruleCustomer->setTimesUsed($ruleCustomer->getTimesUsed() + 1);
                        }
                        else {
                            $ruleCustomer
                            ->setCustomerId($customerId)
                            ->setRuleId($ruleId)
                            ->setTimesUsed(1);
                        }
                        $ruleCustomer->save();
                    }
                }
            }
            $coupon = Mage::getModel('salesrule/coupon');
            /** @var Mage_SalesRule_Model_Coupon */
            $coupon->load($order->getCouponCode(), 'code');
            if ($coupon->getId()) {
                $coupon->setTimesUsed($coupon->getTimesUsed() + 1);
                $coupon->save();
                if ($customerId) {
                    $couponUsage = Mage::getResourceModel('salesrule/coupon_usage');
                    $couponUsage->updateCustomerCouponTimesUsed($customerId, $coupon->getId());
                }
            }
        }
    }

    /**
     * Refresh sales coupons report statistics for last day
     *
     * @param Mage_Cron_Model_Schedule $schedule
     * @return Mage_SalesRule_Model_Observer
     */
    public function aggregateSalesReportCouponsData($schedule)
    {
        Mage::app()->getLocale()->emulate(0);
        $currentDate = Mage::app()->getLocale()->date();
        $date = $currentDate->subHour(25);
        Mage::getResourceModel('salesrule/report_rule')->aggregate($date);
        Mage::app()->getLocale()->revert();
        return $this;
    }

    /**
     * Check rules that contains affected attribute
     * If rules were found they will be set to inactive and notice will be add to admin session
     *
     * @param string $attributeCode
     * @return Mage_SalesRule_Model_Observer
     */
    protected function _checkSalesRulesAvailability($attributeCode)
    {
        /* @var $collection Mage_SalesRule_Model_Mysql4_Rule_Collection */
        $collection = Mage::getResourceModel('salesrule/rule_collection')
            ->addAttributeInConditionFilter($attributeCode);

        $disabledRulesCount = 0;
        foreach ($collection as $rule) {
            /* @var $rule Mage_SalesRule_Model_Rule */
            $rule->setIsActive(0);
            /* @var $rule->getConditions() Mage_SalesRule_Model_Rule_Condition_Combine */
            $this->_removeAttributeFromConditions($rule->getConditions(), $attributeCode);
            $this->_removeAttributeFromConditions($rule->getActions(), $attributeCode);
            $rule->save();

            $disabledRulesCount++;
        }

        if ($disabledRulesCount) {
            Mage::getSingleton('adminhtml/session')->addWarning(
                Mage::helper('salesrule')->__('%d Shopping Cart Price Rules based on "%s" attribute have been disabled.', $disabledRulesCount, $attributeCode));
        }

        return $this;
    }

    /**
     * Remove catalog attribute condition by attribute code from rule conditions
     *
     * @param Mage_Rule_Model_Condition_Combine $combine
     * @param string $attributeCode
     */
    protected function _removeAttributeFromConditions($combine, $attributeCode)
    {
        $conditions = $combine->getConditions();
        foreach ($conditions as $conditionId => $condition) {
            if ($condition instanceof Mage_Rule_Model_Condition_Combine) {
                $this->_removeAttributeFromConditions($condition, $attributeCode);
            }
            if ($condition instanceof Mage_SalesRule_Model_Rule_Condition_Product) {
                if ($condition->getAttribute() == $attributeCode) {
                    unset($conditions[$conditionId]);
                }
            }
        }
        $combine->setConditions($conditions);
    }

    /**
     * After save attribute if it is not used for promo rules already check rules for containing this attribute
     *
     * @param Varien_Event_Observer $observer
     * @return Mage_SalesRule_Model_Observer
     */
    public function catalogAttributeSaveAfter(Varien_Event_Observer $observer)
    {
        $attribute = $observer->getEvent()->getAttribute();
        if ($attribute->dataHasChangedFor('is_used_for_promo_rules') && !$attribute->getIsUsedForPromoRules()) {
            $this->_checkSalesRulesAvailability($attribute->getAttributeCode());
        }

        return $this;
    }

    /**
     * After delete attribute check rules that contains deleted attribute
     * If rules was found they will seted to inactive and added notice to admin session
     *
     * @param Varien_Event_Observer $observer
     * @return Mage_SalesRule_Model_Observer
     */
    public function catalogAttributeDeleteAfter(Varien_Event_Observer $observer)
    {
        $attribute = $observer->getEvent()->getAttribute();
        if ($attribute->getIsUsedForPromoRules()) {
            $this->_checkSalesRulesAvailability($attribute->getAttributeCode());
        }

        return $this;
    }

    /**
     * Append sales rule product attributes to select by quote item collection
     *
     * @param Varien_Event_Observer $observer
     * @return Mage_SalesRule_Model_Observer
     */
    public function addProductAttributes(Varien_Event_Observer $observer)
    {
        // @var Varien_Object
        $attributesTransfer = $observer->getEvent()->getAttributes();

        $attributes = Mage::getResourceModel('salesrule/rule')
            ->getActiveAttributes(
                Mage::app()->getWebsite()->getId(),
                Mage::getSingleton('customer/session')->getCustomer()->getGroupId()
            );
        $result = array();
        foreach ($attributes as $attribute) {
            $result[$attribute['attribute_code']] = true;
        }
        $attributesTransfer->addData($result);
        return $this;
    }

    /**
     * Add coupon's rule name to order data
     *
     * @param Varien_Event_Observer $observer
     * @return Mage_SalesRule_Model_Observer
     */
    public function addSalesRuleNameToOrder($observer)
    {
        $order = $observer->getOrder();
        $couponCode = $order->getCouponCode();

        if (empty($couponCode)) {
            return $this;
        }

        /**
         * @var Mage_SalesRule_Model_Coupon $couponModel
         */
        $couponModel = Mage::getModel('salesrule/coupon');
        $couponModel->loadByCode($couponCode);

        $ruleId = $couponModel->getRuleId();

        if (empty($ruleId)) {
            return $this;
        }

        /**
         * @var Mage_SalesRule_Model_Rule $ruleModel
         */
        $ruleModel = Mage::getModel('salesrule/rule');
        $ruleModel->load($ruleId);

        $order->setCouponRuleName($ruleModel->getName());

        return $this;
    }
}