<?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\CRUD\Controller;

use Chill\MainBundle\CRUD\Resolver\Resolver;
use Chill\MainBundle\Pagination\PaginatorFactory;
use Chill\MainBundle\Pagination\PaginatorInterface;
use Chill\MainBundle\Security\Authorization\AuthorizationHelper;
use Symfony\Bundle\FrameworkBundle\Controller\AbstractController;
use Symfony\Component\EventDispatcher\EventDispatcherInterface;
use Symfony\Component\HttpFoundation\Request;
use Symfony\Component\HttpFoundation\Response;
use Symfony\Component\Serializer\SerializerInterface;
use Symfony\Component\Validator\Validator\ValidatorInterface;
use Symfony\Contracts\Translation\TranslatorInterface;

use function array_merge;

abstract class AbstractCRUDController extends AbstractController
{
    /**
     * The crud configuration.
     *
     * This configuration si defined by `chill_main['crud']` or `chill_main['apis']`
     */
    protected array $crudConfig = [];

    public static function getSubscribedServices(): array
    {
        return array_merge(
            parent::getSubscribedServices(),
            [
                'chill_main.paginator_factory' => PaginatorFactory::class,

                'translator' => TranslatorInterface::class,
                AuthorizationHelper::class => AuthorizationHelper::class,
                EventDispatcherInterface::class => EventDispatcherInterface::class,
                Resolver::class => Resolver::class,
                SerializerInterface::class => SerializerInterface::class,
                'validator' => ValidatorInterface::class,
            ]
        );
    }

    /**
     * Set the crud configuration.
     *
     * Used by the container to inject configuration for this crud.
     */
    public function setCrudConfig(array $config): void
    {
        $this->crudConfig = $config;
    }

    /**
     * Build the base query for listing all entities.
     *
     * This method is used internally by `countEntities` `queryEntities`
     *
     * This base query does not contains any `WHERE` or `SELECT` clauses. You
     * can add some by using the method `customizeQuery`.
     *
     * The alias for the entity is "e".
     *
     * @return QueryBuilder
     */
    protected function buildQueryEntities(string $action, Request $request)
    {
        $qb = $this->getDoctrine()->getManager()
            ->createQueryBuilder()
            ->select('e')
            ->from($this->getEntityClass(), 'e');

        $this->customizeQuery($action, $request, $qb);

        return $qb;
    }

    /**
     * check the acl. Called by every action.
     *
     * By default, check the role given by `getRoleFor` for the value given in
     * $entity.
     *
     * Throw an \Symfony\Component\Security\Core\Exception\AccessDeniedHttpException
     * if not accessible.
     *
     * @param mixed|null $entity
     *
     * @throws \Symfony\Component\Security\Core\Exception\AccessDeniedHttpException
     */
    protected function checkACL(string $action, Request $request, string $_format, $entity = null)
    {
        // @TODO: Implements abstract getRoleFor method or do it in the interface.
        $this->denyAccessUnlessGranted($this->getRoleFor($action, $request, $entity, $_format), $entity);
    }

    /**
     * Count the number of entities.
     *
     * By default, count all entities. You can customize the query by
     * using the method `customizeQuery`.
     *
     * @param mixed $_format
     */
    protected function countEntities(string $action, Request $request, $_format): int
    {
        return $this->buildQueryEntities($action, $request)
            ->select('COUNT(e)')
            ->getQuery()
            ->getSingleScalarResult();
    }

    protected function createEntity(string $action, Request $request): object
    {
        $class = $this->getEntityClass();

        return new $class();
    }

    protected function customizeQuery(string $action, Request $request, $query): void
    {
    }

    protected function getActionConfig(string $action)
    {
        return $this->crudConfig['actions'][$action];
    }

    /**
     * @return string The crud name.
     */
    protected function getCrudName(): string
    {
        return $this->crudConfig['name'];
    }

    /**
     * get the instance of the entity with the given id.
     *
     * @throw Symfony\Component\HttpKernel\Exception\NotFoundHttpException if the object is not found
     *
     * @param mixed $action
     */
    protected function getEntity($action, string $id, Request $request): object
    {
        $e = $this
            ->getDoctrine()
            ->getRepository($this->getEntityClass())
            ->find($id);

        if (null === $e) {
            throw $this->createNotFoundException(sprintf('The object %s for id %s is not found', $this->getEntityClass(), $id));
        }

        return $e;
    }

    /**
     * Get the FQDN of the class.
     *
     * @return class-string The FQDN of the class
     */
    protected function getEntityClass(): string
    {
        return $this->crudConfig['class'];
    }

    protected function getPaginatorFactory(): PaginatorFactory
    {
        return $this->container->get('chill_main.paginator_factory');
    }

    /**
     * Get the result of the query.
     *
     * @param mixed $query
     */
    protected function getQueryResult(string $action, Request $request, string $_format, int $totalItems, PaginatorInterface $paginator, $query)
    {
        return $query->getQuery()->getResult();
    }

    protected function getValidator(): ValidatorInterface
    {
        return $this->get('validator');
    }

    /**
     * Called on post check ACL.
     *
     * @param mixed $entity
     */
    protected function onPostCheckACL(string $action, Request $request, string $_format, $entity): ?Response
    {
        return null;
    }

    /**
     * Called on post fetch entity.
     *
     * @param mixed $entity
     * @param mixed $_format
     */
    protected function onPostFetchEntity(string $action, Request $request, $entity, $_format): ?Response
    {
        return null;
    }

    /**
     * Method used by indexAction.
     *
     * @param mixed $query
     */
    protected function onPostIndexBuildQuery(string $action, Request $request, string $_format, int $totalItems, PaginatorInterface $paginator, $query): ?Response
    {
        return null;
    }

    /**
     * Method used by indexAction.
     *
     * @param mixed $entities
     */
    protected function onPostIndexFetchQuery(string $action, Request $request, string $_format, int $totalItems, PaginatorInterface $paginator, $entities): ?Response
    {
        return null;
    }

    protected function onPreIndex(string $action, Request $request, string $_format): ?Response
    {
        return null;
    }

    /**
     * Method used by indexAction.
     */
    protected function onPreIndexBuildQuery(string $action, Request $request, string $_format, int $totalItems, PaginatorInterface $paginator): ?Response
    {
        return null;
    }

    /**
     * Add ordering fields in the query build by self::queryEntities.
     *
     * @param mixed $query
     * @param mixed $_format
     */
    protected function orderQuery(string $action, $query, Request $request, PaginatorInterface $paginator, $_format)
    {
        return $query;
    }

    /**
     * Query the entity.
     *
     * By default, get all entities. You can customize the query by using the
     * method `customizeQuery`.
     *
     * The method `orderEntity` is called internally to order entities.
     *
     * It returns, by default, a query builder.
     */
    protected function queryEntities(string $action, Request $request, string $_format, PaginatorInterface $paginator)
    {
        $query = $this->buildQueryEntities($action, $request)
            ->setFirstResult($paginator->getCurrentPage()->getFirstItemNumber())
            ->setMaxResults($paginator->getItemsPerPage());

        // allow to order queries and return the new query
        return $this->orderQuery($action, $query, $request, $paginator, $_format);
    }
}