<?php

namespace App\Service;

use App\Entity\Counter;
use App\Repository\CounterRepository;
use Doctrine\ORM\EntityManagerInterface;
use Symfony\Component\EventDispatcher\Attribute\AsEventListener;
use Symfony\Component\HttpKernel\Event\ControllerEvent;
use Symfony\Component\HttpKernel\KernelEvents;
use Symfony\Component\Workflow\Attribute\AsCompletedListener;
use Symfony\Component\Workflow\Attribute\AsEnteredListener;
use Symfony\Component\Workflow\Event\Event;
use Symfony\Component\Workflow\WorkflowInterface;

class CounterManager
{
    public function __construct(
        protected EntityManagerInterface $em,
        protected WorkflowInterface $countdownStateMachine,
        protected CounterRepository $counterRepository
    )
    {

    }

    #[AsEnteredListener('countdown', Counter::STATE_READY)]
    public function init(Event $event): void
    {
        /** @var Counter $counter */
        $counter = $event->getSubject();
        $this->em->persist($counter);
        $this->em->flush();
    }

    #[AsCompletedListener('countdown', Counter::TRANSITION_TO_STARTED)]
    public function started(Event $event): void
    {
        /** @var Counter $counter */
        $counter = $event->getSubject();
        $counter
            ->setStartTime(new \DateTimeImmutable('now'))
            ->setEndTime($counter->getStartTime()->add(new \DateInterval($counter->getTimeTolive())))
        ;
        $this->em->flush();
    }

    #[AsCompletedListener('countdown', Counter::TRANSITION_TO_COMPLETED)]
    public function completed(Event $event): void
    {
        return;
    }

    #[AsCompletedListener('countdown', Counter::TRANSITION_TO_READY)]
    public function toReady(Event $event): void
    {
        /** @var Counter $counter */
        $counter = $event->getSubject();
        $counter
            ->setStartTime(null)
            ->setEndTime(null)
        ;
        //$this->em->flush();
    }

    #[AsEventListener(KernelEvents::CONTROLLER)]
    public function onKernelController(ControllerEvent $event) {
        if (!$event->isMainRequest()) {
            return;
        }

        $counters = $this->counterRepository->findBy(['state' => Counter::STATE_STARTED]);
        foreach($counters as $counter) {
            if ($counter->getEndTime() <= new \DateTime('now')) {
                $this->countdownStateMachine->apply($counter, Counter::TRANSITION_TO_COMPLETED);
            }
        }
        $this->em->flush();
    }
}