<?php

declare(strict_types=1);

/*
 * 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.
 */

namespace Chill\MainBundle\Controller;

use Chill\MainBundle\Entity\User;
use Chill\MainBundle\Entity\Workflow\EntityWorkflow;
use Chill\MainBundle\Entity\Workflow\EntityWorkflowStep;
use Chill\MainBundle\Entity\Workflow\EntityWorkflowStepSignature;
use Chill\MainBundle\Form\WorkflowSignatureMetadataType;
use Chill\MainBundle\Form\WorkflowStepType;
use Chill\MainBundle\Pagination\PaginatorFactory;
use Chill\MainBundle\Repository\Workflow\EntityWorkflowRepository;
use Chill\MainBundle\Security\Authorization\EntityWorkflowVoter;
use Chill\MainBundle\Security\ChillSecurity;
use Chill\MainBundle\Workflow\EntityWorkflowManager;
use Chill\MainBundle\Workflow\WorkflowTransitionContextDTO;
use Doctrine\ORM\EntityManagerInterface;
use Symfony\Bundle\FrameworkBundle\Controller\AbstractController;
use Symfony\Component\Clock\ClockInterface;
use Symfony\Component\Form\Extension\Core\Type\FormType;
use Symfony\Component\Form\Extension\Core\Type\SubmitType;
use Symfony\Component\HttpFoundation\Request;
use Symfony\Component\HttpFoundation\Response;
use Symfony\Component\HttpKernel\Exception\AccessDeniedHttpException;
use Symfony\Component\HttpKernel\Exception\BadRequestHttpException;
use Symfony\Component\Routing\Annotation\Route;
use Symfony\Component\Validator\Validator\ValidatorInterface;
use Symfony\Component\Workflow\Registry;
use Symfony\Component\Workflow\TransitionBlocker;
use Symfony\Contracts\Translation\TranslatorInterface;

class WorkflowController extends AbstractController
{
    public function __construct(
        private readonly EntityWorkflowManager $entityWorkflowManager,
        private readonly EntityWorkflowRepository $entityWorkflowRepository,
        private readonly ValidatorInterface $validator,
        private readonly PaginatorFactory $paginatorFactory,
        private readonly Registry $registry,
        private readonly EntityManagerInterface $entityManager,
        private readonly TranslatorInterface $translator,
        private readonly ChillSecurity $security,
        private readonly \Doctrine\Persistence\ManagerRegistry $managerRegistry,
        private readonly ClockInterface $clock,
    ) {}

    #[Route(path: '/{_locale}/main/workflow/create', name: 'chill_main_workflow_create')]
    public function create(Request $request): Response
    {
        if (!$request->query->has('entityClass')) {
            throw new BadRequestHttpException('Missing entityClass parameter');
        }

        if (!$request->query->has('entityId')) {
            throw new BadRequestHttpException('missing entityId parameter');
        }

        if (!$request->query->has('workflow')) {
            throw new BadRequestHttpException('missing workflow parameter');
        }

        $entityWorkflow = new EntityWorkflow();
        $entityWorkflow
            ->setRelatedEntityClass($request->query->get('entityClass'))
            ->setRelatedEntityId($request->query->getInt('entityId'))
            ->setWorkflowName($request->query->get('workflow'))
            ->addSubscriberToFinal($this->security->getUser());

        $errors = $this->validator->validate($entityWorkflow, null, ['creation']);

        if (\count($errors) > 0) {
            $msg = [];

            foreach ($errors as $error) {
                /* @var \Symfony\Component\Validator\ConstraintViolationInterface $error */
                $msg[] = $error->getMessage();
            }

            return new Response(implode("\n", $msg), Response::HTTP_UNPROCESSABLE_ENTITY);
        }

        $this->denyAccessUnlessGranted(EntityWorkflowVoter::CREATE, $entityWorkflow);

        $em = $this->managerRegistry->getManager();
        $em->persist($entityWorkflow);
        $em->flush();

        return $this->redirectToRoute('chill_main_workflow_show', ['id' => $entityWorkflow->getId()]);
    }

    #[Route(path: '/{_locale}/main/workflow/{id}/delete', name: 'chill_main_workflow_delete')]
    public function delete(EntityWorkflow $entityWorkflow, Request $request): Response
    {
        $this->denyAccessUnlessGranted(EntityWorkflowVoter::DELETE, $entityWorkflow);

        $form = $this->createForm(FormType::class);
        $form->add('submit', SubmitType::class, ['label' => 'workflow.Delete workflow']);
        $form->handleRequest($request);

        if ($form->isSubmitted() && $form->isValid()) {
            $this->entityManager->remove($entityWorkflow);
            $this->entityManager->flush();

            $this->addFlash('success', $this->translator->trans('workflow.Workflow deleted with success'));

            return $this->redirectToRoute('chill_main_homepage');
        }

        return $this->render('@ChillMain/Workflow/delete.html.twig', [
            'entityWorkflow' => $entityWorkflow,
            'delete_form' => $form->createView(),
            'handler' => $this->entityWorkflowManager->getHandler($entityWorkflow),
        ]);
    }

    #[Route(path: '/{_locale}/main/workflow-step/{id}/access_key', name: 'chill_main_workflow_grant_access_by_key')]
    public function getAccessByAccessKey(EntityWorkflowStep $entityWorkflowStep, Request $request): Response
    {
        if (null === $accessKey = $request->query->get('accessKey', null)) {
            throw new BadRequestHttpException('accessKey is missing');
        }

        if (!$this->getUser() instanceof User) {
            throw new AccessDeniedHttpException('Not a valid user');
        }

        if ($entityWorkflowStep->getAccessKey() !== $accessKey) {
            throw new AccessDeniedHttpException('Access key is invalid');
        }

        if (!$entityWorkflowStep->isWaitingForTransition()) {
            $this->addFlash('error', $this->translator->trans('workflow.Steps is not waiting for transition. Maybe someone apply the transition before you ?'));
        } else {
            $entityWorkflowStep->addDestUserByAccessKey($this->security->getUser());
            $this->entityManager->flush();
            $this->addFlash('success', $this->translator->trans('workflow.You get access to this step'));
        }

        return $this->redirectToRoute('chill_main_workflow_show', ['id' => $entityWorkflowStep->getEntityWorkflow()->getId()]);
    }

    /**
     * Previous workflows where the user has applyed a transition.
     */
    #[Route(path: '/{_locale}/main/workflow/list/previous_transitionned', name: 'chill_main_workflow_list_previous_transitionned')]
    public function myPreviousWorkflowsTransitionned(Request $request): Response
    {
        $this->denyAccessUnlessGranted('IS_AUTHENTICATED_REMEMBERED');

        $total = $this->entityWorkflowRepository->countByPreviousTransitionned($this->security->getUser());
        $paginator = $this->paginatorFactory->create($total);

        $workflows = $this->entityWorkflowRepository->findByPreviousTransitionned(
            $this->security->getUser(),
            ['createdAt' => 'DESC'],
            $paginator->getItemsPerPage(),
            $paginator->getCurrentPageFirstItemNumber()
        );

        return $this->render(
            '@ChillMain/Workflow/list.html.twig',
            [
                'help' => 'workflow.Previous workflow transitionned help',
                'workflows' => $this->buildHandler($workflows),
                'paginator' => $paginator,
                'step' => 'previous_transitionned',
            ]
        );
    }

    /**
     * Previous workflows where the user was mentioned, but did not give any reaction.
     */
    #[Route(path: '/{_locale}/main/workflow/list/previous_without_reaction', name: 'chill_main_workflow_list_previous_without_reaction')]
    public function myPreviousWorkflowsWithoutReaction(Request $request): Response
    {
        $this->denyAccessUnlessGranted('IS_AUTHENTICATED_REMEMBERED');

        $total = $this->entityWorkflowRepository->countByPreviousDestWithoutReaction($this->security->getUser());
        $paginator = $this->paginatorFactory->create($total);

        $workflows = $this->entityWorkflowRepository->findByPreviousDestWithoutReaction(
            $this->security->getUser(),
            ['createdAt' => 'DESC'],
            $paginator->getItemsPerPage(),
            $paginator->getCurrentPageFirstItemNumber()
        );

        return $this->render(
            '@ChillMain/Workflow/list.html.twig',
            [
                'help' => 'workflow.Previous workflow without reaction help',
                'workflows' => $this->buildHandler($workflows),
                'paginator' => $paginator,
                'step' => 'previous_without_reaction',
            ]
        );
    }

    #[Route(path: '/{_locale}/main/workflow/list/cc', name: 'chill_main_workflow_list_cc')]
    public function myWorkflowsCc(Request $request): Response
    {
        $this->denyAccessUnlessGranted('IS_AUTHENTICATED_REMEMBERED');

        $total = $this->entityWorkflowRepository->countByDest($this->security->getUser());
        $paginator = $this->paginatorFactory->create($total);

        $workflows = $this->entityWorkflowRepository->findByCc(
            $this->security->getUser(),
            ['createdAt' => 'DESC'],
            $paginator->getItemsPerPage(),
            $paginator->getCurrentPageFirstItemNumber()
        );

        return $this->render(
            '@ChillMain/Workflow/list.html.twig',
            [
                'workflows' => $this->buildHandler($workflows),
                'paginator' => $paginator,
                'step' => 'cc',
            ]
        );
    }

    #[Route(path: '/{_locale}/main/workflow/list/dest', name: 'chill_main_workflow_list_dest')]
    public function myWorkflowsDest(Request $request): Response
    {
        $this->denyAccessUnlessGranted('IS_AUTHENTICATED_REMEMBERED');

        $total = $this->entityWorkflowRepository->countByDest($this->security->getUser());
        $paginator = $this->paginatorFactory->create($total);

        $workflows = $this->entityWorkflowRepository->findByDest(
            $this->security->getUser(),
            ['createdAt' => 'DESC'],
            $paginator->getItemsPerPage(),
            $paginator->getCurrentPageFirstItemNumber()
        );

        return $this->render(
            '@ChillMain/Workflow/list.html.twig',
            [
                'workflows' => $this->buildHandler($workflows),
                'paginator' => $paginator,
                'step' => 'dest',
            ]
        );
    }

    #[Route(path: '/{_locale}/main/workflow/list/subscribed', name: 'chill_main_workflow_list_subscribed')]
    public function myWorkflowsSubscribed(Request $request): Response
    {
        $this->denyAccessUnlessGranted('IS_AUTHENTICATED_REMEMBERED');

        $total = $this->entityWorkflowRepository->countBySubscriber($this->security->getUser());
        $paginator = $this->paginatorFactory->create($total);

        $workflows = $this->entityWorkflowRepository->findBySubscriber(
            $this->security->getUser(),
            ['createdAt' => 'DESC'],
            $paginator->getItemsPerPage(),
            $paginator->getCurrentPageFirstItemNumber()
        );

        return $this->render(
            '@ChillMain/Workflow/list.html.twig',
            [
                'workflows' => $this->buildHandler($workflows),
                'paginator' => $paginator,
                'step' => 'subscribed',
            ]
        );
    }

    #[Route(path: '/{_locale}/main/workflow/{id}/show', name: 'chill_main_workflow_show')]
    public function show(EntityWorkflow $entityWorkflow, Request $request): Response
    {
        $this->denyAccessUnlessGranted(EntityWorkflowVoter::SEE, $entityWorkflow);

        $handler = $this->entityWorkflowManager->getHandler($entityWorkflow);
        $workflow = $this->registry->get($entityWorkflow, $entityWorkflow->getWorkflowName());
        $errors = [];
        $signatures = $entityWorkflow->getCurrentStep()->getSignatures();

        if (\count($workflow->getEnabledTransitions($entityWorkflow)) > 0) {
            // possible transition
            $stepDTO = new WorkflowTransitionContextDTO($entityWorkflow);
            $usersInvolved = $entityWorkflow->getUsersInvolved();
            $currentUserFound = array_search($this->security->getUser(), $usersInvolved, true);

            if (false !== $currentUserFound) {
                unset($usersInvolved[$currentUserFound]);
            }

            $transitionForm = $this->createForm(
                WorkflowStepType::class,
                $stepDTO,
                [
                    'entity_workflow' => $entityWorkflow,
                    'suggested_users' => $usersInvolved,
                ]
            );

            $transitionForm->handleRequest($request);

            if ($transitionForm->isSubmitted() && $transitionForm->isValid()) {
                if (!$workflow->can($entityWorkflow, $transition = $transitionForm['transition']->getData()->getName())) {
                    $blockers = $workflow->buildTransitionBlockerList($entityWorkflow, $transition);
                    $msgs = array_map(fn (TransitionBlocker $tb) => $this->translator->trans(
                        $tb->getMessage(),
                        $tb->getParameters()
                    ), iterator_to_array($blockers));

                    throw $this->createAccessDeniedException(sprintf("not allowed to apply transition {$transition}: %s", implode(', ', $msgs)));
                }

                $byUser = $this->security->getUser();

                $workflow->apply($entityWorkflow, $transition, [
                    'context' => $stepDTO,
                    'byUser' => $byUser,
                    'transition' => $transition,
                    'transitionAt' => $this->clock->now(),
                ]);

                $this->entityManager->flush();

                return $this->redirectToRoute('chill_main_workflow_show', ['id' => $entityWorkflow->getId()]);
            }

            if ($transitionForm->isSubmitted() && !$transitionForm->isValid()) {
                $this->addFlash('error', $this->translator->trans('This form contains errors'));
            }
        }

        return $this->render(
            '@ChillMain/Workflow/index.html.twig',
            [
                'handler' => $handler,
                'handler_template' => $handler->getTemplate($entityWorkflow),
                'handler_template_data' => $handler->getTemplateData($entityWorkflow),
                'transition_form' => isset($transitionForm) ? $transitionForm->createView() : null,
                'entity_workflow' => $entityWorkflow,
                'transition_form_errors' => $errors,
                'signatures' => $signatures,
            ]
        );
    }

    private function buildHandler(array $workflows): array
    {
        $lines = [];

        foreach ($workflows as $workflow) {
            $handler = $this->entityWorkflowManager->getHandler($workflow);
            $lines[] = [
                'handler' => $handler,
                'entity_workflow' => $workflow,
            ];
        }

        return $lines;
    }

    #[Route(path: '/{_locale}/main/workflow/signature/{signature_id}/metadata', name: 'chill_main_workflow_signature_metadata')]
    public function addSignatureMetadata(int $signature_id, Request $request): Response
    {
        $signature = $this->entityManager->getRepository(EntityWorkflowStepSignature::class)->find($signature_id);

        if ($signature->getSigner() instanceof User) {
            return $this->redirectToRoute('chill_main_workflow_signature_add', ['id' => $signature_id]);
        }

        $metadataForm = $this->createForm(WorkflowSignatureMetadataType::class);
        $metadataForm->add('submit', SubmitType::class, ['label' => $this->translator->trans('Save')]);

        $metadataForm->handleRequest($request);

        if ($metadataForm->isSubmitted() && $metadataForm->isValid()) {
            $data = $metadataForm->getData();

            $signature->setSignatureMetadata(
                [
                    'base_signer' => [
                        'document_type' => $data['documentType'],
                        'document_number' => $data['documentNumber'],
                        'expiration_date' => $data['expirationDate'],
                    ],
                ]
            );

            $this->entityManager->persist($signature);
            $this->entityManager->flush();

            return $this->redirectToRoute('chill_main_workflow_signature_add', ['id' => $signature_id]);
        }

        return $this->render(
            '@ChillMain/Workflow/_signature_metadata.html.twig',
            [
                'metadata_form' => $metadataForm->createView(),
                'person' => $signature->getSigner(),
            ]
        );
    }
}