<?php

namespace App\Controller;

use App\ApiErrorException;
use App\DTO\ApiErrorMessage;
use App\Entity\Booking;
use App\Entity\BookingCustomer;
use App\Entity\BookingRoom;
use App\Repository\BookingRepository;
use App\Repository\RoomCategoryRepository;
use App\Repository\RoomAvailabilityRepository;
use App\Request\BookingCreateRequest;
use App\Request\BookingDetailsRequest;
use App\Response\BookingCreateResponse;
use App\Service\PricesService;
use Doctrine\ORM\EntityManagerInterface;
use Nelmio\ApiDocBundle\Annotation\Model;
use Symfony\Bundle\FrameworkBundle\Controller\AbstractController;
use Symfony\Component\HttpFoundation\JsonResponse;
use Symfony\Component\HttpFoundation\Request;
use Symfony\Component\HttpKernel\Exception\HttpException;
use Symfony\Component\Routing\Attribute\Route;
use OpenApi\Attributes as OA;
use Symfony\Component\HttpKernel\Attribute\MapRequestPayload;
use Symfony\Component\HttpKernel\Exception\NotFoundHttpException;

class BookingController extends AbstractController
{
    /**
     * Get booking details
     */
    #[Route('/api/booking/details', name: 'app_booking_details', methods: ["POST"], format: "json")]
    #[OA\Tag(name: "Booking")]
    #[OA\Response(
        response: 200,
        description: 'Returns booking details',
        content: new OA\JsonContent(
            type: 'object',
            ref: new Model(type: Booking::class),
        )
    )]
    #[OA\RequestBody(
        content: new OA\JsonContent(
            type: 'object',
            ref: new Model(type: BookingDetailsRequest::class),
        )
    )]
    public function getBookingDetails(
        BookingRepository $repoBooking,
        #[MapRequestPayload()] BookingDetailsRequest $detailsRequest
    ): JsonResponse {

        if (\is_null($detailsRequest)) {
            throw new ApiErrorException(new ApiErrorMessage(400, ApiErrorMessage::TYPE_INVALID_REQUEST_BODY_FORMAT));
        }

        $selectedBooking = $repoBooking->findOneBy(["refNumber" => $detailsRequest->refNumber]);
        if (\is_null($selectedBooking)) {
            throw new NotFoundHttpException('Booking not found');
        }

        if ($selectedBooking->getBookingCustomer()->getEmail() != $detailsRequest->email) {
            throw new NotFoundHttpException('Booking not found');
        }

        return $this->json($selectedBooking);
    }

    /**
     * Create a new Booking.
     */
    #[Route('/api/booking/create', name: 'app_booking_create', methods: ["POST"], format: "json")]
    #[OA\Tag(name: "Booking")]
    #[OA\Response(
        response: 200,
        description: 'Returns booking details',
        content: new OA\JsonContent(
            type: 'object',
            ref: new Model(type: BookingCreateResponse::class)
        )
    )]
    #[OA\RequestBody(
        content: new OA\JsonContent(
            type: 'object',
            ref: new Model(type: BookingCreateRequest::class),
        )
    )]
    public function newBooking(
        Request $request,
        EntityManagerInterface $entityManager,
        RoomCategoryRepository $repoCat,
        RoomAvailabilityRepository $repoAvailability,
        PricesService $priceSrv,
        #[MapRequestPayload()] BookingCreateRequest $createRequest
    ): JsonResponse {
        if (\is_null($createRequest)) {
            throw new ApiErrorException(
                new ApiErrorMessage(400, ApiErrorMessage::TYPE_INVALID_REQUEST_BODY_FORMAT)
            );
        }

        $booking = new Booking();
        try {
            if ($createRequest->arrivalDate >= $createRequest->departureDate) {
                throw new ApiErrorException(
                    new ApiErrorMessage(422, ApiErrorMessage::TYPE_INVALID_DATE),
                    'Arrival cant be before departure',
                );
            }

            $entityManager->beginTransaction();

            $currentTime = new \DateTime("now");

            // Create booking from request data.
            $booking->setBookingTime($currentTime);
            $booking->setArrivalDate($createRequest->arrivalDate);
            $booking->setDepartureDate($createRequest->departureDate);
            $booking->setBookingCustomer($createRequest->customerDetails);

            //TODOME: Improve refNumber generation.
            $highest_id = $entityManager->createQueryBuilder()
                ->select('MAX(e.id)')
                ->from('App\Entity\Booking', 'e')
                ->getQuery()
                ->getSingleScalarResult();

            $booking->setRefNumber($currentTime->format("Y") . $highest_id + 1);

            $entityManager->persist($booking);

            if (\count($createRequest->rooms) == 0) {
                throw new ApiErrorException(
                    new ApiErrorMessage(422, ApiErrorMessage::TYPE_VALIDATION_ERROR),
                    'Booking must contain rooms',
                );
            }

            // Create each room.
            foreach ($createRequest->rooms as $roomItem) {
                $room = new BookingRoom();
                $room->setBooking($booking);

                //Get Room category.
                $roomCategory = $repoCat->find($roomItem->roomCategory);
                if ($roomCategory == null) {
                    throw new ApiErrorException(
                        new ApiErrorMessage(422, ApiErrorMessage::TYPE_VALIDATION_ERROR),
                        'Invalid RoomCategory: ' . $roomItem->roomCategory,
                    );
                }

                //Check room availability.
                $amountAvailable = $repoAvailability->getAvailabilityForCategoryInPeriod($roomCategory, $createRequest->arrivalDate, $createRequest->departureDate);
                $selectedAmount = $roomItem->amount;
                $selectedGuestAmount = $roomItem->guestNumber;

                if ($amountAvailable == null || $selectedAmount > $amountAvailable) {
                    throw new ApiErrorException(
                        new ApiErrorMessage(400, ApiErrorMessage::TYPE_LOGICAL_ERROR),
                        'Not enought rooms available for category: ' . $roomItem->roomCategory,
                    );
                }

                $room->setRoomCategory($roomCategory);
                $room->setGuestNumber($selectedGuestAmount);
                $room->setAmount($selectedAmount);

                //Get Price for period.
                $priceList = $priceSrv->getFinalPricesForSearch($roomCategory, $createRequest->arrivalDate, $createRequest->departureDate);
                $priceFound = false;
                foreach ($priceList as $key => $value) {
                    if ($key == $selectedGuestAmount) {
                        $room->setRoomPrice($value);
                        $priceFound = true;
                        break;
                    }
                }

                if (!$priceFound) {
                    throw new ApiErrorException(
                        new ApiErrorMessage(422, ApiErrorMessage::TYPE_LOGICAL_ERROR),
                        'Price not found for category: ' . $roomCategory->getId() . ', guests: ' . $selectedGuestAmount,
                    );
                }

                $entityManager->persist($room);

                //If booking is nice, let's update current availability.
                $repoAvailability->updateAvailabilityForRoomCategoryOnPeriod($roomCategory, $createRequest->arrivalDate, $createRequest->departureDate, $selectedAmount, true); //Update using "diff" mode.
            }

            $entityManager->commit();
            $entityManager->flush();
        } catch (\Throwable $th) {
            $entityManager->rollback();
            throw $th;
        }

        $results = ["refNumber" => $booking->getRefNumber()];

        return $this->json($results);
    }
}