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<?php

namespace AppBundle\Form\EventListener;

use AppBundle\Entity\Notification;
use AppBundle\Entity\Notification\NotificationAware;
use Doctrine\Common\Collections\ArrayCollection;
use Doctrine\Common\Collections\Collection;
use Symfony\Component\EventDispatcher\EventSubscriberInterface;
use Symfony\Component\Form\FormEvent;
use Symfony\Component\Form\FormEvents;

/**
 * Class NotificationChangesAdminWatcher
 * @package AppBundle\Form\EventListener
 */
class NotificationChangesAdminWatcher implements EventSubscriberInterface
{
    /**
     * @var Collection
     */
    protected $submittedNotifications;


//    /**
//     * @var Collection
//     */
//    protected $notificationSnapshot;
//    /**
//     * @var Collection
//     */
//    protected $notificationRemoved;
//    /**
//     * @var Collection
//     */
//    protected $notificationAdded;
//    /**
//     * @var Collection
//     */
//    protected $notificationUpdated;

    /**
     * Enumerates events this subscriber subscribed on
     */
    public static function getSubscribedEvents()
    {
        return [
//            FormEvents::PRE_SUBMIT => 'onPreSubmit',
            FormEvents::POST_SUBMIT => 'onPostSubmit',
        ];
    }

//    /**
//     * @param FormEvent $event
//     */
    public function onPreSubmit(FormEvent $event)
    {
//        $notificationSnapshot = $event->getForm()->getData()->getNotifications();
//
//        $notificationRequestArray = $event->getData()['notifications'];
//
//
//        $qw = 2;
//
    }



    /**
     * @param FormEvent $event
     */
    public function onPostSubmit(FormEvent $event)
    {
        if ($event->getForm()->isValid()) {
            $submittedObject = $event->getData();

            if ($submittedObject instanceof NotificationAware) {
                /** @var Notification $notification */
                foreach ($submittedObject->getNotifications() as $notification) {
                    $notification->sniffStartType();
                }
            }
        }
    }

    /**
     * @return Collection
     */
    public function getSubmittedNotifications()
    {
        return $this->submittedNotifications;
    }

//    /**
//     * @return Collection
//     */
//    public function getNotificationAdded()
//    {
//        return $this->notificationAdded;
//    }
//
//    /**
//     * @return Collection
//     */
//    public function getNotificationRemoved()
//    {
//        return $this->notificationRemoved;
//    }
//
//    /**
//     * @return Collection
//     */
//    public function getNotificationUpdated()
//    {
//        return $this->notificationUpdated;
//    }
//
//    /**
//     * @return Collection
//     */
//    public function getNotificationSnapshot()
//    {
//        return $this->notificationSnapshot;
//    }

//    /**
//     * @param Collection $notificationChanges
//     */
//    protected function mergeRequestChangesToNotifications(Collection $notificationChanges)
//    {
//        $this->notificationUpdated = new ArrayCollection();
//
//        $snapshot = $this->getNotificationSnapshot();
//
//        $minElementsLength = min($notificationChanges->count(), $snapshot->count());
//        for ($i = 0; $i <= $minElementsLength- 1; $i++) {
//            $notification = $snapshot->get($i);
//            $changeSet = $notificationChanges->get($i);
//
//            foreach ($changeSet as $key => $currentFieldValue) {
//                if (! is_callable([$notification, 'get' . ucfirst($key)])) {
//                    continue;
//                }
//
//                $oldFieldValue = call_user_func([$notification, 'get' . ucfirst($key)]);
//
//                if (! $this->fieldsEqual($oldFieldValue, $currentFieldValue)) {
//                    if (is_callable([$notification, 'set' . ucfirst($key)])) {
//                        call_user_func([$notification, 'set' . ucfirst($key)], $currentFieldValue);
//                        $this->notificationUpdated->add($notification);
//                    }
//
//                }
//            }
//        }
//    }
//
//    /**
//     * @param Collection $submittedNotifications
//     */
//    protected function countRemovedNotifications(Collection $submittedNotifications)
//    {
//        $diffRemoved = array_udiff_assoc(
//            $this->notificationSnapshot->toArray(),
//            $submittedNotifications->toArray(),
//            function($a, $b) { return $a === $b ? 0 : 1; }
//        );
//
//        $this->notificationRemoved = new ArrayCollection($diffRemoved);
//    }
//
//    /**
//     * @param Collection $submittedNotifications
//     */
//    protected function countAddedNotifications(Collection $submittedNotifications)
//    {
//        $diffAdded = array_udiff_assoc(
//            $submittedNotifications->toArray(),
//            $this->notificationSnapshot->toArray(),
//            function($a, $b) { return $a === $b ? 0 : 1; }
//        );
//
//        $this->notificationAdded = new ArrayCollection($diffAdded);
//    }
//
//    /**
//     * @param $oldFieldValue
//     * @param $currentFieldValue
//     * @return bool
//     */
//    private function fieldsEqual($oldFieldValue, $currentFieldValue)
//    {
//        if ($oldFieldValue instanceof \DateTime || $currentFieldValue instanceof \DateTime) {
//            is_string($oldFieldValue)
//                ? $oldFieldValue = new \DateTime($oldFieldValue)
//                : $currentFieldValue = new \DateTime($currentFieldValue);
//        }
//
//        return $oldFieldValue == $currentFieldValue;
//    }


}