<?php

namespace Chill\MainBundle\CRUD\Controller;

use Symfony\Bundle\FrameworkBundle\Controller\AbstractController;
use Symfony\Component\HttpFoundation\Request;
use Symfony\Component\HttpFoundation\Response;
use Symfony\Component\Routing\Annotation\Route;
use Chill\MainBundle\Pagination\PaginatorFactory;
use Chill\MainBundle\Pagination\PaginatorInterface;

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

    /**
     * get the instance of the entity with the given id
     * 
     * @param string $id
     * @return object
     */
    protected function getEntity($action, $id, Request $request): ?object
    {
        return $this->getDoctrine()
            ->getRepository($this->getEntityClass())
            ->find($id);
    }

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

    /**
     * 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);
    }

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

    /**
     * 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".
     * 
     * @param string $action
     * @param Request $request
     * @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;
    }

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

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

    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;
    }

    /**
     * method used by indexAction
     */
    protected function onPostIndexBuildQuery(string $action, Request $request, string $_format, int $totalItems, PaginatorInterface $paginator, $query): ?Response
    {
        return null;
    }
    
    /**
     * method used by indexAction
     */
    protected function onPostIndexFetchQuery(string $action, Request $request, string $_format, int $totalItems, PaginatorInterface $paginator, $entities): ?Response
    {
        return null;
    }
    

    /**
     * Get the complete FQDN of the class
     * 
     * @return string the complete fqdn of the class
     */
    protected function getEntityClass(): string
    {
        return $this->crudConfig['class'];
    }
    
    /**
     * called on post fetch entity 
     */
    protected function onPostFetchEntity(string $action, Request $request, $entity, $_format): ?Response
    {
        return null;
    }

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

    /**
     * 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.
     * 
     * @throws \Symfony\Component\Security\Core\Exception\AccessDeniedHttpException
     */
    protected function checkACL(string $action, Request $request, string $_format, $entity = null)
    {
        $this->denyAccessUnlessGranted($this->getRoleFor($action, $request, $entity, $_format), $entity);
    }

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

    protected function getActionConfig(string $action)
    {
        return $this->crudConfig['actions'][$action];
    }
    
    /**
     * Set the crud configuration
     *
     * Used by the container to inject configuration for this crud.
     */
    public function setCrudConfig(array $config): void
    {
        $this->crudConfig = $config;
    }

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