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<?php
/**
 * Copyright (c) 2020 Kaliop Digital Commerce (https://digitalcommerce.kaliop.com) All Rights Reserved.
 * https://opensource.org/licenses/OSL-3.0  Open Software License (OSL 3.0)
 * Cnc
 * Radosław Stępień <[email protected]> <[email protected]>
 */
namespace Cnc\AdminHistory\Observer;

use Cnc\AdminHistory\Model\CustomerFactory;
use Cnc\AdminHistory\Model\Customer;
use Cnc\AdminHistory\Model\ResourceModel\Customer as CustomerResource;
use Cnc\Customer\Model\Config;
use Magento\Backend\Model\Auth\Session;
use Magento\Customer\Model\GroupRegistry;
use Magento\Framework\Event\Observer;
use Magento\Framework\Event\ObserverInterface;
use Magento\Framework\Exception\AlreadyExistsException;
use Magento\Framework\Stdlib\DateTime\DateTime;

/**
 * Class SaveCustomerHistory
 * observer to log changes done in customer edit page
 */
class SaveCustomerHistory implements ObserverInterface
{
    /** @var CustomerFactory */
    protected $customerHistoryFactory;

    /** @var CustomerResource */
    protected $customerHistoryResource;

    /** @var Session */
    protected $authSession;

    /** @var DateTime  */
    protected $date;

    /**
     * @var GroupRegistry
     */
    private $groupRegistry;

    /**
     * SaveCustomerHistory constructor.
     * @param CustomerFactory $customerHistoryFactory
     * @param CustomerResource $customerHistoryResource
     * @param Session $authSession
     * @param DateTime $date
     * @param GroupRegistry $groupRegistry
     */
    public function __construct(
        CustomerFactory $customerHistoryFactory,
        CustomerResource $customerHistoryResource,
        Session $authSession,
        DateTime $date,
        GroupRegistry $groupRegistry
    ) {
        $this->customerHistoryFactory = $customerHistoryFactory;
        $this->customerHistoryResource = $customerHistoryResource;
        $this->authSession = $authSession;
        $this->date = $date;
        $this->groupRegistry = $groupRegistry;
    }

    /**
     * @param Observer $observer
     * @throws AlreadyExistsException
     * @todo add logger on payment authorisation change in customer edit
     */
    public function execute(Observer $observer): void
    {
        $changedData = [];

        /** @var \Magento\Customer\Model\Data\Customer $customerData */
        $customerData = $observer->getCustomerDataObject();
        /** @var \Magento\Customer\Model\Data\Customer $originCustomerData */
        $originCustomerData = $observer->getOrigCustomerDataObject();
        $isGroupChanged = false;
        $oldCustomerGroup = '';
        if ($customerData) {
            $customerId = $customerData->getId();
            $newCustomerGroup = $customerData->getGroupId();
            if ($originCustomerData) {
                $oldCustomerGroup = $originCustomerData->getGroupId();
                if ($oldCustomerGroup != $newCustomerGroup) {
                    $isGroupChanged = true;
                }
            } else {
                $isGroupChanged = true;
            }

            if ($isGroupChanged) {
                $oldCustomerGroupModel = $oldCustomerGroup ? $this->groupRegistry->retrieve($oldCustomerGroup) : null;
                $newCustomerGroupModel = $this->groupRegistry->retrieve($newCustomerGroup);
                $changedData []= [
                    'attribute_code' => 'customer_group',
                    'old_value' => $oldCustomerGroupModel && $oldCustomerGroupModel->getId() ?
                        $oldCustomerGroupModel->getCode() . ' (id: ' . $oldCustomerGroup . ')' : $oldCustomerGroup,
                    'new_value' => $newCustomerGroupModel && $newCustomerGroupModel->getId() ?
                        $newCustomerGroupModel->getCode() . ' (id: ' . $newCustomerGroup . ')' : $newCustomerGroup
                ];
            }
        }

        if ($originCustomerData != null) {
            $oldEnableOffPay = $originCustomerData->getCustomAttribute(
                Config::CUSTOMER_ATTRIBUTE_ENABLE_OFF_PAY_CODE
            );
            $newEnableOffPay = $customerData->getCustomAttribute(
                Config::CUSTOMER_ATTRIBUTE_ENABLE_OFF_PAY_CODE
            );
            $oldEnablePaymentOnReceipt = $originCustomerData->getCustomAttribute(
                Config::CUSTOMER_ATTRIBUTE_ENABLE_PAYMENT_ON_RECEIPT_INVOICE
            );
            $newEnablePaymentOnReceipt = $customerData->getCustomAttribute(
                Config::CUSTOMER_ATTRIBUTE_ENABLE_PAYMENT_ON_RECEIPT_INVOICE
            );

            $oldEnableOffPayValue = ($oldEnableOffPay ? $oldEnableOffPay->getValue() : '');
            $newEnableOffPayValue = ($newEnableOffPay ? $newEnableOffPay->getValue() : '');
            if ($oldEnableOffPayValue != $newEnableOffPayValue) {
                $changedData [] = [
                    'attribute_code' => Config::CUSTOMER_ATTRIBUTE_ENABLE_OFF_PAY_CODE,
                    'old_value' => $oldEnableOffPayValue,
                    'new_value' => $newEnableOffPayValue
                ];
            }

            $oldEnablePaymentOnReceiptValue = $oldEnablePaymentOnReceipt ? $oldEnablePaymentOnReceipt->getValue() : '';
            $newEnablePaymentOnReceiptValue = $newEnablePaymentOnReceipt ? $newEnablePaymentOnReceipt->getValue() : '';
            if ($oldEnablePaymentOnReceiptValue != $newEnablePaymentOnReceiptValue) {
                $changedData [] = [
                    'attribute_code' => Config::CUSTOMER_ATTRIBUTE_ENABLE_PAYMENT_ON_RECEIPT_INVOICE,
                    'old_value' => $oldEnablePaymentOnReceiptValue,
                    'new_value' => $newEnablePaymentOnReceiptValue
                ];
            }
        }

        foreach ($changedData as $data) {
            try {
                $userName = $this->authSession->getUser() ? $this->authSession->getUser()->getName() : '';
                $updatedAt = $this->date->gmtDate();
                /** @var Customer $customerHistory */
                $customerHistory = $this->customerHistoryFactory->create();
                $customerHistory->setAttributeCode($data['attribute_code']);
                $customerHistory->setOldValue($data['old_value']);
                $customerHistory->setNewValue($data['new_value']);
                $customerHistory->setCustomerId($customerId);
                $customerHistory->setUpdatedAt($updatedAt);
                $customerHistory->setUser($userName);

                $this->customerHistoryResource->save($customerHistory);
            } catch (AlreadyExistsException $e) {
                throw new AlreadyExistsException(__('Could not save customer history log: %1', $e->getMessage()));
            }
        }
    }
}