<?php

namespace App\Controller;

use Doctrine\ORM\Query;
use Doctrine\ORM\QueryBuilder;
use Doctrine\ORM\EntityManagerInterface;
use Symfony\Component\HttpFoundation\Request;
use Symfony\Component\HttpFoundation\Response;
use Symfony\Component\Validator\Validator\ValidatorInterface;
use Symfony\Bundle\FrameworkBundle\Controller\Controller;

use Sensio\Bundle\FrameworkExtraBundle\Configuration\ParamConverter;
use Sensio\Bundle\FrameworkExtraBundle\Configuration\IsGranted;

use App\Entity\ItemType;
use App\Entity\Item;
use App\Entity\Battery;
use App\Entity\ServiceOffering;

use Catalyst\MenuBundle\Annotation\Menu;

class ItemController extends Controller
{
    /**
     * @Menu(selected="item_list")
     * @IsGranted("item.list")
     */
    public function index ()
    {
        return $this->render('item/list.html.twig');
    }

    /**
     * @IsGranted("item.list")
     */
    public function datatableRows(Request $req)
    {
        // get query builder
        $qb = $this->getDoctrine()
                ->getRepository(Item::class)
                ->createQueryBuilder('q');

        // get datatable params
        $datatable = $req->request->get('datatable');

        // count total records
        $tquery = $qb->select('COUNT(q)')
            ->innerJoin('q.battery', 'b', 'WITH', 'b.id = q.item_id')
            ->innerJoin('q.service_offering', 'so', 'WITH', 'so.id = q.item_id');
        $this->setQueryFilters($datatable, $tquery);
        $total = $tquery->getQuery()
            ->getSingleScalarResult();

        // get current page number
        $page = $datatable['pagination']['page'] ?? 1;

        $perpage = $datatable['pagination']['perpage'];
        $offset = ($page - 1) * $perpage;

        // add metadata
        $meta = [
            'page' => $page,
            'perpage' => $perpage,
            'pages' => ceil($total / $perpage),
            'total' => $total,
            'sort' => 'asc',
            'field' => 'id'
        ];

        // build query
        $query = $qb->select('q')
            ->innerJoin('q.battery', 'b', 'WITH', 'b.id = q.item_id')
            ->innerJoin('q.service_offering', 'so', 'WITH', 'so.id = q.item_id');
        $this->setQueryFilters($datatable, $query);

        // check if sorting is present, otherwise use default
        if (isset($datatable['sort']['field']) && !empty($datatable['sort']['field'])) {
            $order = $datatable['sort']['sort'] ?? 'asc';
            $query->orderBy('q.' . $datatable['sort']['field'], $order);
        } else {
            $query->orderBy('q.id', 'asc');
        }

        // get rows for this page
        $obj_rows = $query->setFirstResult($offset)
            ->setMaxResults($perpage)
            ->getQuery()
            ->getResult();

        // process rows
        $rows = [];
        foreach ($obj_rows as $orow) {
            // add row data
            $row['id'] = $orow->getID();

            // add row metadata
            $row['meta'] = [
                'update_url' => '',
                'delete_url' => ''
            ];

            // add crud urls
            if ($this->isGranted('item_price.update'))
                $row['meta']['update_url'] = $this->generateUrl('item_price_update_form', ['id' => $row['id']]);
            if ($this->isGranted('item_price.delete'))
                $row['meta']['delete_url'] = $this->generateUrl('item_price_delete', ['id' => $row['id']]);

            $rows[] = $row;
        }

        // response
        return $this->json([
            'meta' => $meta,
            'data' => $rows
        ]);
    }

    protected function setQueryFilters($datatable, QueryBuilder $query)
    {
        // TODO: add filter for item type.
        // TODO: fix filter for name since name is with the associated entity
        if (isset($datatable['query']['data-rows-search']) && !empty($datatable['query']['data-rows-search'])) {
            $query->where('q.name LIKE :filter')
                ->setParameter('filter', '%' . $datatable['query']['data-rows-search'] . '%');
        }
    }
}