<?php

/**
 * Chill is a software for social workers
 *
 * For the full copyright and license information, please view
 * the LICENSE file that was distributed with this source code.
 */

declare(strict_types=1);

namespace Chill\MainBundle\Workflow\EventSubscriber;

use Chill\MainBundle\Entity\User;
use Chill\MainBundle\Entity\Workflow\EntityWorkflow;
use Chill\MainBundle\Templating\Entity\UserRender;
use DateTimeImmutable;
use Psr\Log\LoggerInterface;
use Symfony\Component\EventDispatcher\EventSubscriberInterface;
use Symfony\Component\Security\Core\Security;
use Symfony\Component\Workflow\Event\Event;
use Symfony\Component\Workflow\Event\GuardEvent;
use Symfony\Component\Workflow\TransitionBlocker;

class EntityWorkflowTransitionEventSubscriber implements EventSubscriberInterface
{
    private LoggerInterface $chillLogger;

    private Security $security;

    private UserRender $userRender;

    public function __construct(
        LoggerInterface $chillLogger,
        Security $security,
        UserRender $userRender
    ) {
        $this->chillLogger = $chillLogger;
        $this->security = $security;
        $this->userRender = $userRender;
    }

    public static function getSubscribedEvents(): array
    {
        return [
            'workflow.transition' => 'onTransition',
            'workflow.guard' => [
                ['guardEntityWorkflow', 0],
            ],
        ];
    }

    public function guardEntityWorkflow(GuardEvent $event)
    {
        if (!$event->getSubject() instanceof EntityWorkflow) {
            return;
        }

        /** @var EntityWorkflow $entityWorkflow */
        $entityWorkflow = $event->getSubject();

        if ($entityWorkflow->isFinalize()) {
            $event->addTransitionBlocker(
                new TransitionBlocker(
                    'workflow.The workflow is finalized',
                    'd6306280-7535-11ec-a40d-1f7bee26e2c0'
                )
            );

            return;
        }

        if (!$entityWorkflow->getCurrentStep()->getDestUser()->contains($this->security->getUser())) {
            if (!$event->getMarking()->has('initial')) {
                $event->addTransitionBlocker(new TransitionBlocker(
                    'workflow.You are not allowed to apply a transition on this workflow. Only those users are allowed: %users%',
                    'f3eeb57c-7532-11ec-9495-e7942a2ac7bc',
                    [
                        '%users%' => implode(
                            ', ',
                            $entityWorkflow->getCurrentStep()->getDestUser()->map(function (User $u) {
                                return $this->userRender->renderString($u, []);
                            })->toArray()
                        ),
                    ]
                ));
            }
        }
    }

    public function onTransition(Event $event)
    {
        if (!$event->getSubject() instanceof EntityWorkflow) {
            return;
        }

        /** @var EntityWorkflow $entityWorkflow */
        $entityWorkflow = $event->getSubject();
        $step = $entityWorkflow->getCurrentStep();

        $step
            ->setTransitionAfter($event->getTransition()->getName())
            ->setTransitionAt(new DateTimeImmutable('now'))
            ->setTransitionBy($this->security->getUser());

        $this->chillLogger->info('[workflow] apply transition on entityWorkflow', [
            'relatedEntityClass' => $entityWorkflow->getRelatedEntityClass(),
            'relatedEntityId' => $entityWorkflow->getRelatedEntityId(),
            'transition' => $event->getTransition()->getName(),
            'by_user' => $this->security->getUser(),
            'entityWorkflow' => $entityWorkflow->getId(),
        ]);
    }
}