<?php

namespace App\Controller;

use App\Ramcar\BaseController;
use App\Entity\Vehicle;
use App\Entity\VehicleManufacturer;

use Doctrine\ORM\Query;
use Symfony\Component\HttpFoundation\Request;
use Symfony\Component\HttpFoundation\Response;
use Symfony\Component\Validator\Validator\ValidatorInterface;

class VehicleController extends BaseController
{
    public function index()
    {
        $this->denyAccessUnlessGranted('vehicle.list', null, 'No access.');

        $params = $this->initParameters('vehicle_list');

        // response
        return $this->render('vehicle/list.html.twig', $params);
    }

    public function rows(Request $req)
    {
        $this->denyAccessUnlessGranted('vehicle.list', null, 'No access.');

    	// build query
    	$qb = $this->getDoctrine()
        	->getRepository(Vehicle::class)
        	->createQueryBuilder('q');

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

        // count total records
        $tquery = $qb->select('COUNT(q)')
            ->join('q.manufacturer', 'mfg');

        // add filters to count query
        $this->setQueryFilters($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')
            ->addSelect('mfg.name as mfg_name');

        // add filters to query
        $this->setQueryFilters($datatable, $query);

        // check if sorting is present, otherwise use default
        if (isset($datatable['sort']['field']) && !empty($datatable['sort']['field'])) {
            $prefix = '';

            if (!in_array($datatable['sort']['field'], ['mfg_name']))
                $prefix = 'q.';

            $order = $datatable['sort']['sort'] ?? 'asc';
            $query->orderBy($prefix . $datatable['sort']['field'], $order);
        } else {
            $query->orderBy('mfg_name', '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[0]->getID();
            $row['mfg_name'] = $orow['mfg_name'];
            $row['make'] = $orow[0]->getMake();
            $row['model_year_from'] = $orow[0]->getModelYearFrom();
            $row['model_year_to'] = $orow[0]->getModelYearTo();
            $row['model_year_formatted'] = $orow[0]->getModelYearFormatted();

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

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

            $rows[] = $row;
        }

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

    public function addForm()
    {
        $this->denyAccessUnlessGranted('vehicle.add', null, 'No access.');

        $params = $this->initParameters('vehicle_list');
        $params['obj'] = new Vehicle();
        $params['mode'] = 'create';

        $em = $this->getDoctrine()->getManager();

        // get parent associations
        $params['manufacturers'] = $em->getRepository(VehicleManufacturer::class)->findAll();

        $params['years'] = $this->generateYearOptions();

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

    public function addSubmit(Request $req, ValidatorInterface $validator)
    {
        $this->denyAccessUnlessGranted('vehicle.add', null, 'No access.');

        // create new row
        $em = $this->getDoctrine()->getManager();
        $row = new Vehicle();

        // set and save values
        $row->setMake($req->request->get('make'))
            ->setModelYearFrom($req->request->get('model_year_from'))
            ->setModelYearTo($req->request->get('model_year_to'));

        // initialize error list
        $error_array = [];

        // custom validation for associations
        $manufacturer = $em->getRepository(VehicleManufacturer::class)
            ->find($req->request->get('manufacturer'));

        if (empty($manufacturer))
            $error_array['manufacturer'] = 'Invalid manufacturer selected.';
        else
            $row->setManufacturer($manufacturer);

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

        // 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);
        } else {
            // validated! save the entity
            $em->persist($row);
            $em->flush();

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

    public function updateForm($id)
    {
        $this->denyAccessUnlessGranted('vehicle.update', null, 'No access.');

        $params = $this->initParameters('vehicle_list');
        $params['mode'] = 'update';

        // get row data
        $em = $this->getDoctrine()->getManager();
        $row = $em->getRepository(Vehicle::class)->find($id);

        // make sure this row exists
        if (empty($row))
            throw $this->createNotFoundException('The item does not exist');

        // get parent associations
        $params['manufacturers'] = $em->getRepository(VehicleManufacturer::class)->findAll();

        $params['years'] = $this->generateYearOptions();
        $params['obj'] = $row;

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

    public function updateSubmit(Request $req, ValidatorInterface $validator, $id)
    {
        $this->denyAccessUnlessGranted('vehicle.update', null, 'No access.');

        // get row data
        $em = $this->getDoctrine()->getManager();
        $row = $em->getRepository(Vehicle::class)->find($id);

        // make sure this row exists
        if (empty($row))
            throw $this->createNotFoundException('The item does not exist');

        // set and save values
        $row->setMake($req->request->get('make'))
            ->setModelYearFrom($req->request->get('model_year_from'))
            ->setModelYearTo($req->request->get('model_year_to'));

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

        // initialize error list
        $error_array = [];

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

        // custom validation for associations
        $manufacturer = $em->getRepository(VehicleManufacturer::class)
            ->find($req->request->get('manufacturer'));

        if (empty($manufacturer))
            $error_array['manufacturer'] = 'Invalid manufacturer selected.';
        else
            $row->setManufacturer($manufacturer);

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

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

    public function destroy($id)
    {
        $this->denyAccessUnlessGranted('vehicle.delete', null, 'No access.');

    	$params = $this->initParameters('vehicle_list');

        // get row data
        $em = $this->getDoctrine()->getManager();
        $row = $em->getRepository(Vehicle::class)->find($id);

        if (empty($row))
            throw $this->createNotFoundException('The item does not exist');

        // delete this row
        $em->remove($row);
        $em->flush();

        // response
        $response = new Response();
        $response->setStatusCode(Response::HTTP_OK);
        $response->send();
    }

    protected function generateYearOptions()
    {
        $start_year = 1950;
        return range($start_year, date("Y") + 1);
    }

    // check if datatable filter is present and append to query
    protected function setQueryFilters($datatable, &$query) {
        if (isset($datatable['query']['data-rows-search']) && !empty($datatable['query']['data-rows-search'])) {
            $query->where('mfg.name LIKE :filter')
                ->orWhere('q.make LIKE :filter')
                ->orWhere('q.model_year_from LIKE :filter')
                ->orWhere('q.model_year_to LIKE :filter')
                ->setParameter('filter', '%' . $datatable['query']['data-rows-search'] . '%');
        }
    }
}