<?php declare(strict_types=1);

namespace App\EventListener;

use App\Entity\MenuItem;
use App\Entity\OrderItem;
use App\Repository\MenuItemRepository;
use Doctrine\Bundle\DoctrineBundle\Attribute\AsDoctrineListener;
use Doctrine\ORM\Event\PreFlushEventArgs;
use Doctrine\ORM\Events;
use Doctrine\Persistence\ObjectManager;

#[AsDoctrineListener(event: Events::preFlush)]
final readonly class OrderItemPreFlush
{
    public function __construct(
        private MenuItemRepository $menuItemRepository,
    ) {}

    public function preFlush(PreFlushEventArgs $eventArgs): void
    {
        foreach (($eventArgs->getObjectManager()->getUnitOfWork()->getIdentityMap()[OrderItem::class] ?? []) as $orderItem) {
            $this->checkOrderItem($orderItem, $eventArgs->getObjectManager());
        }
    }

    private function checkOrderItem(OrderItem $orderItem, ObjectManager $objectManager): void
    {
        $menuItem = $this->menuItemRepository->findOneBy([
            'name' => $orderItem->getName(),
            'foodVendor' => $orderItem->getFoodOrder()
                ->getFoodVendor(),
        ]);
        if ($menuItem === null) {
            $menuItem = new MenuItem;
            $menuItem->setName($orderItem->getName());
            $menuItem->setFoodVendor($orderItem->getFoodOrder()->getFoodVendor());
            $objectManager->persist($menuItem);
        }
        if ($menuItem->getAliasOf() !== null) {
            $menuItem = $menuItem->getAliasOf();
            $orderItem->setName($menuItem->getName());
        }
        $orderItem->setMenuItem($menuItem);
        if ($orderItem->getPriceCents() === 0) {
            $orderItem->setPriceCents($menuItem->getPriceCents());
        } elseif ($orderItem->getPriceCents() !== $menuItem->getPriceCents()) {
            $menuItem->setPriceCents($orderItem->getPriceCents());
            $objectManager->persist($menuItem);
        }
    }
}