<?php

namespace App\Controller;

use App\Ramcar\BaseController;
use App\Ramcar\DayOfWeek;
use App\Entity\Rider;
use App\Entity\RiderSchedule;
use App\Entity\Hub;
use App\Service\FileUploader;

use Doctrine\ORM\Query;
use Symfony\Component\HttpFoundation\Request;
use Symfony\Component\HttpFoundation\Response;
use Symfony\Component\Security\Core\Encoder\EncoderFactoryInterface;
use Symfony\Component\Validator\Validator\ValidatorInterface;

use DateTime;

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

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

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

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

    	// get query builder
    	$qb = $this->getDoctrine()
        	->getRepository(Rider::class)
        	->createQueryBuilder('q');

        // build expression now since we're reusing it
        $hub_label = $qb->expr()->concat('hub.name', $qb->expr()->literal(' '), 'hub.branch');

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

        // count total records
        $tquery = $qb->select('COUNT(q)')
            ->leftJoin('q.hub', 'hub');

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

        $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 = $qb->select('q')
            ->addSelect($hub_label . 'as hub_name');

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

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

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

            $order = $datatable['sort']['sort'] ?? 'asc';
            $query->orderBy($prefix . $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[0]->getID();
            $row['image_file'] = $orow[0]->getImageFile();
            $row['first_name'] = $orow[0]->getFirstName();
            $row['last_name'] = $orow[0]->getLastName();
            $row['plate_number'] = $orow[0]->getPlateNumber();
            $row['contact_num'] = $orow[0]->getContactNumber();
            $row['hub_name'] = $orow['hub_name'];

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

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

            $rows[] = $row;
        }

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

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

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

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

        // get parent associations
        $params['hubs'] = $em->getRepository(Hub::class)->findAll();
        $params['days_of_week'] = DayOfWeek::getCollection();

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

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

        /*
        error_log(print_r($req->request->all(), true));
        throw $this->createNotFoundException('The item does not exist');
        */

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

        // set and save values
        $obj->setFirstName($req->request->get('first_name'))
            ->setLastName($req->request->get('last_name'))
            ->setContactNumber($req->request->get('contact_no'))
            ->setPlateNumber($req->request->get('plate_number'))
            ->setImageFile($req->request->get('image_file'));

        // initialize error list
        $error_array = [];

        // custom validation for associations
        $hub_id = $req->request->get('hub');

        if ($hub_id) {
            $hub = $em->getRepository(Hub::class)
                ->find($hub_id);

            if (empty($hub))
                $error_array['hub'] = 'Invalid hub selected.';
            else
                $obj->setHub($hub);
        }

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

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

        // save schedules
        $days_of_week = DayOfWeek::getCollection();

        $time_start_input = $req->request->get('time_start');
        $time_end_input = $req->request->get('time_end');
        $break_start_input = $req->request->get('break_start');
        $break_end_input = $req->request->get('break_end');
        $has_schedule = $req->request->get('has_schedule');

        // intitialize has schedule to an array
        if ($has_schedule == null)
            $has_schedule = [];

        foreach ($days_of_week as $key => $day) {
            if (in_array($key, $has_schedule)) {
                $serror_array = [];

                $sobj = new RiderSchedule();

                $sobj->setDayOfWeek($key)
                    ->setTimeStart($time_start_input[$key])
                    ->setTimeEnd($time_end_input[$key])
                    ->setBreakStart($break_start_input[$key])
                    ->setBreakEnd($break_end_input[$key])
                    ->setRider($obj);

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

                // add errors to list
                foreach ($errors as $error) {
                    $serror_array[$error->getPropertyPath() . "_" . $key] = $error->getMessage();
                }

                if (empty($serror_array)) {
                     $obj->addSchedule($sobj);
                } else {
                    $error_array = array_merge($error_array, $serror_array);
                }
            }
        }

        // 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
            $em->persist($obj);
            $em->flush();

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

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

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

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

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

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

        // get parent associations
        $params['hubs'] = $em->getRepository(Hub::class)->findAll();
        $params['days_of_week'] = DayOfWeek::getCollection();

        $params['obj'] = $row;

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

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

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

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

        // set and save values
        $obj->setFirstName($req->request->get('first_name'))
            ->setLastName($req->request->get('last_name'))
            ->setContactNumber($req->request->get('contact_no'))
            ->setPlateNumber($req->request->get('plate_number'))
            ->setImageFile($req->request->get('image_file'));

        // initialize error list
        $error_array = [];

        // custom validation for associations
        $hub_id = $req->request->get('hub');

        if ($hub_id) {
            $hub = $em->getRepository(Hub::class)
                ->find($hub_id);

            if (empty($hub))
                $error_array['hub'] = 'Invalid hub selected.';
            else
                $obj->setHub($hub);
        } else {
            $obj->clearHub();
        }

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

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

        // save schedules
        $days_of_week = DayOfWeek::getCollection();

        $time_start_input = $req->request->get('time_start');
        $time_end_input = $req->request->get('time_end');
        $break_start_input = $req->request->get('break_start');
        $break_end_input = $req->request->get('break_end');
        $has_schedule = $req->request->get('has_schedule');

        foreach ($days_of_week as $key => $day) {
            if (in_array($key, $has_schedule)) {
                $serror_array = [];

                $sobj = $em->getRepository(RiderSchedule::class)->findOneBy([
                    'rider' => $obj,
                    'day_of_week' => $key
                ]);

                // create new schedule row if not found
                if (empty($sobj)) {
                    $sobj = new RiderSchedule();
                    $sobj->setDayOfWeek($key)
                        ->setRider($obj);
                }

                $sobj->setTimeStart($time_start_input[$key])
                    ->setTimeEnd($time_end_input[$key])
                    ->setBreakStart($break_start_input[$key])
                    ->setBreakEnd($break_end_input[$key]);

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

                // add errors to list
                foreach ($errors as $error) {
                    $serror_array[$error->getPropertyPath() . "_" . $key] = $error->getMessage();
                }

                if (empty($serror_array)) {
                    if (empty($sobj->getID()))
                        $obj->addSchedule($sobj);
                } else {
                    $error_array = array_merge($error_array, $serror_array);
                }
            }
        }

        // cleanup
        // delete all schedules not in list
        $schedules = $obj->getSchedules();
        foreach ($schedules as $schedule)
        {
            if (!in_array($schedule->getDayOfWeek(), $has_schedule))
            {
                $obj->removeSchedule($schedule);
                $em->remove($schedule);
            }
        }

        // 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('rider.delete', null, 'No access.');

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

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

    public function uploadImage(Request $req, FileUploader $uploader)
    {
        // retrieve temporary info for file
        $file = $req->files->get('image_file');

        // upload the file
        $filename = $uploader->upload($file);

        // return response
        return $this->json([
            'success' => true,
            'filename' => $filename
        ]);
    }

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