<?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\Component\Routing\Generator\UrlGeneratorInterface;
use Symfony\Bundle\FrameworkBundle\Controller\Controller;

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

use Catalyst\MenuBundle\Annotation\Menu;

use App\Entity\PriceTier;
use App\Entity\SupportedArea;

class PriceTierController extends Controller
{
    /**
     * @Menu(selected="price_tier_list")
     * @IsGranted("price_tier.list")
     */
    public function index()
    {
        return $this->render('price-tier/list.html.twig');
    }

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

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

        // count total records
        $tquery = $qb->select('COUNT(q)');
        $this->setQueryFilters($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');
        $this->setQueryFilters($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();
            $row['name'] = $orow->getName();

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

            // add crud urls
            if ($this->isGranted('price_tier.update'))
                $row['meta']['update_url'] = $this->generateUrl('price_tier_update_form', ['id' => $row['id']]);
            if ($this->isGranted('service_offering.delete'))
                $row['meta']['delete_url'] = $this->generateUrl('price_tier_delete', ['id' => $row['id']]);

            $rows[] = $row;
        }

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

    /**
     * @Menu(selected="price_tier.list")
     * @IsGranted("price_tier.add")
     */
    public function addForm(EntityManagerInterface $em)
    {
        $pt = new PriceTier();

        // get the supported areas
        $sets = $this->generateFormSets($em);

        $params = [
            'obj' => $pt,
            'sets' => $sets,
            'mode' => 'create',
        ];

        // response
        return $this->render('price-tier/form.html.twig', $params);
    }

    /**
     * @IsGranted("price_tier.add")
     */
    public function addSubmit(Request $req, EntityManagerInterface $em, ValidatorInterface $validator)
    {
        $pt = new PriceTier();

        // TODO: add validation for supported area
        $this->setObject($pt, $req);

        // validate
        $errors = $validator->validate($pt);

        // initialize error list
        $error_array = [];

        // add errors to list
        foreach ($errors as $error) {
            $error_array[$error->getPropertyPath()] = $error->getMessage();
        }

        // check if any errors were found
        if (!empty($error_array)) {
            // return validation failure response
            return $this->json([
                'success' => false,
                'errors' => $error_array
            ], 422);
        }

        // validated! save the entity
        $em->persist($pt);

        // set the price tier id for the selected supported areas
        $this->updateSupportedAreas($em, $pt, $req);

        $em->flush();

        // return successful response
        return $this->json([
            'success' => 'Changes have been saved!'
        ]);
    }

    /**
     * @Menu(selected="price_tier_list")
     * @ParamConverter("price_tier", class="App\Entity\PriceTier")
     * @IsGranted("price_tier.update")
     */
    public function updateForm($id, EntityManagerInterface $em, PriceTier $pt)
    {
        // get the supported areas
        $sets = $this->generateFormSets($em);

        $params = [
            'obj' => $pt,
            'sets' => $sets,
            'mode' => 'update',
        ];

        // response
        return $this->render('price-tier/form.html.twig', $params);
    }

    protected function setObject(PriceTier $obj, Request $req)
    {
        $obj->setName($req->request->get('name'));
    }

    public function updateSupportedAreas(EntityManagerInterface $em, PriceTier $obj, Request $req)
    {
        // get the selected areas
        $areas = $req->request->get('areas');

        foreach ($areas as $area_id)
        {
            // get supported area
            $supported_area = $em->getRepository(SupportedArea::class)->find($area_id);

            if ($supported_area != null)
                $supported_area->setPriceTier($obj);
        }
    }

    protected function generateFormSets(EntityManagerInterface $em)
    {
        // get the supported areas
        // TODO: filter out the supported areas that already have a price tier id? but if we're editing, we need those price tiers
        $areas = $em->getRepository(SupportedArea::class)->findAll();
        $areas_set = [];
        foreach ($areas as $area)
        {
            $areas_set[$area->getID()] = $area->getName();
        }

        return [
            'areas' => $areas_set
        ];
    }

    protected function setQueryFilters($datatable, QueryBuilder $query)
    {
        if (isset($datatable['query']['data-rows-search']) && !empty($datatable['query']['data-rows-search'])) {
            $query->where('q.name LIKE :filter')
                ->setParameter('filter', '%' . $datatable['query']['data-rows-search'] . '%');
        }
    }
}