<?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\ActivityBundle\Timeline;

use Chill\ActivityBundle\Entity\Activity;
use Chill\ActivityBundle\Repository\ActivityACLAwareRepository;
use Chill\MainBundle\Entity\User;
use Chill\MainBundle\Security\Authorization\AuthorizationHelperInterface;
use Chill\MainBundle\Timeline\TimelineProviderInterface;
use Chill\MainBundle\Timeline\TimelineSingleQuery;
use Chill\PersonBundle\Entity\Person;
use Doctrine\ORM\EntityManagerInterface;
use LogicException;
use RuntimeException;
use Symfony\Component\Security\Core\Authentication\Token\Storage\TokenStorageInterface;
use Symfony\Component\Security\Core\Role\Role;
use Symfony\Component\Security\Core\User\UserInterface;

use function implode;
use function in_array;
use function strtr;

class TimelineActivityProvider implements TimelineProviderInterface
{
    private const SUPPORTED_CONTEXTS = ['center', 'person'];

    protected UserInterface $user;

    public function __construct(
        protected EntityManagerInterface $em,
        protected AuthorizationHelperInterface $helper,
        TokenStorageInterface $storage,
        protected ActivityACLAwareRepository $aclAwareRepository
    ) {
        if (!$storage->getToken()->getUser() instanceof User) {
            throw new RuntimeException('A user should be authenticated !');
        }

        $this->user = $storage->getToken()->getUser();
    }

    public function fetchQuery($context, array $args)
    {
        if ('center' === $context) {
            return TimelineSingleQuery::fromArray($this->aclAwareRepository
                ->queryTimelineIndexer($context, $args));
        }

        $metadataActivity = $this->em->getClassMetadata(Activity::class);

        [$where, $parameters] = $this->getWhereClauseForPerson($args['person']);

        return TimelineSingleQuery::fromArray([
            'id' => $metadataActivity->getTableName()
                 . '.' . $metadataActivity->getColumnName('id'),
            'type' => 'activity',
            'date' => $metadataActivity->getTableName()
                 . '.' . $metadataActivity->getColumnName('date'),
            'FROM' => $this->getFromClausePerson(),
            'WHERE' => $where,
            'parameters' => $parameters,
        ]);
    }

    public function getEntities(array $ids): array
    {
        $activities = $this->em->getRepository(Activity::class)
            ->findBy(['id' => $ids]);

        $result = [];

        foreach ($activities as $activity) {
            $result[$activity->getId()] = $activity;
        }

        return $result;
    }

    public function getEntityTemplate($entity, $context, array $args): array
    {
        $this->checkContext($context);

        return [
            'template' => 'ChillActivityBundle:Timeline:activity_person_context.html.twig',
            'template_data' => [
                'activity' => $entity,
                'context' => $context,
            ],
        ];
    }

    public function supportsType($type): bool
    {
        return 'activity' === $type;
    }

    /**
     * Check if the context is supported.
     *
     * @throws LogicException if the context is not supported
     */
    private function checkContext(string $context)
    {
        if (false === in_array($context, self::SUPPORTED_CONTEXTS, true)) {
            throw new LogicException(
                sprintf(
                    "The context '%s' is not supported. Currently only 'person' is supported",
                    $context
                )
            );
        }
    }

    private function getFromClausePerson(): string
    {
        $metadataActivity = $this->em->getClassMetadata(Activity::class);
        $metadataPerson = $this->em->getClassMetadata(Person::class);
        $associationMapping = $metadataActivity->getAssociationMapping('person');

        return sprintf(
            '%s JOIN %s ON %s.%s = %s',
            $metadataActivity->getTableName(),
            $metadataPerson->getTableName(),
            $metadataPerson->getTableName(),
            $associationMapping['joinColumns'][0]['referencedColumnName'],
            $associationMapping['joinColumns'][0]['name']
        );
    }

    private function getWhereClauseForPerson(Person $person)
    {
        $parameters = [];
        $metadataActivity = $this->em->getClassMetadata(Activity::class);
        $associationMapping = $metadataActivity->getAssociationMapping('person');
        $role = new Role('CHILL_ACTIVITY_SEE');
        $reachableScopes = $this->helper->getReachableScopes($this->user, $role->getRole(), $person->getCenter());
        $whereClause = ' {activity.person_id} = ? AND {activity.scope_id} IN ({scopes_ids}) ';
        $scopes_ids = [];

        // first parameter: activity.person_id
        $parameters[] = $person->getId();

        // loop on reachable scopes
        foreach ($reachableScopes as $scope) {
            /** @phpstan-ignore-next-line  */
            if (in_array($scope->getId(), $scopes_ids, true)) {
                continue;
            }
            $scopes_ids[] = '?';
            $parameters[] = $scope->getId();
        }

        return [
            strtr(
                $whereClause,
                [
                    '{activity.person_id}' => $associationMapping['joinColumns'][0]['name'],
                    '{activity.scope_id}' => $metadataActivity->getTableName() . '.' .
                        $metadataActivity->getAssociationMapping('scope')['joinColumns'][0]['name'],
                    '{scopes_ids}' => implode(', ', $scopes_ids),
                ]
            ),
            $parameters,
        ];
    }
}