<?php

declare(strict_types=1);

namespace App\Controller\Booking\Create;

use App\BusProNet\ApiClient;
use App\BusProNet\Exception\TimeoutException;
use App\BusProNet\Model\Notification;
use App\Controller\Booking\Traits\BookingCreateTrait;
use App\Controller\Booking\Traits\BookingExceptionHandlerTrait;
use App\Form\BookingCreateStep4Type;
use App\Form\Model\BookingDto;
use App\Htmx\HxTrait;
use App\Service\BookingPriceCalculatorService;
use App\Service\BookingService;
use App\Service\BookingSummaryDataService;
use Psr\Log\LoggerInterface;
use Symfony\Bundle\FrameworkBundle\Controller\AbstractController;
use Symfony\Component\Form\FormInterface;
use Symfony\Component\HttpFoundation\Request;
use Symfony\Component\HttpFoundation\Response;
use Symfony\Component\Routing\Attribute\Route;
use Symfony\Contracts\Cache\CacheInterface;

/**
 * Handles the fourth step of the booking creation process (confirmation).
 */
class Step4Controller extends AbstractController
{
    use BookingCreateTrait;
    use BookingExceptionHandlerTrait;
    use HxTrait;

    public function __construct(
        private readonly BookingService $bookingService,
        private readonly BookingSummaryDataService $summaryDataService,
        private readonly BookingPriceCalculatorService $priceCalculator,
        private readonly ApiClient $apiClient,
        private readonly CacheInterface $cache,
        private readonly LoggerInterface $logger,
    ) {
    }

    /**
     * Displays booking summary and confirmation form.
     */
    #[Route('/bookings/create/confirmation', name: 'app_booking_create_step_4')]
    public function index(Request $request): Response
    {
        $result = $this->getOrCreateBookingCreateDto($this->bookingService, $request);
        if ($result instanceof Response) {
            return $result;
        }
        $bookingCreateDto = $result;

        // Validate step access
        if ($redirect = $this->validateStepAccess($bookingCreateDto, 4)) {
            return $redirect;
        }

        $form = $this->createForm(BookingCreateStep4Type::class, $bookingCreateDto, [
            'attr' => [
                'hx-post' => $this->generateUrl('app_booking_create_step_4'),
                'hx-target' => '#form-wrapper',
                'hx-select' => '#form-wrapper',
                'hx-swap' => 'outerHTML',
            ],
        ]);
        $form->handleRequest($request);

        if (true === $form->isSubmitted() && true === $form->isValid()) {
            try {
                // Submit final booking (already validated in Step 3)
                $bookingResponse = $this->apiClient->createBooking($bookingCreateDto);

                if ($bookingResponse instanceof Notification) {
                    return $this->handleApiError(
                        'Booking creation failed - API notification',
                        ['message' => $bookingResponse->message],
                        $bookingResponse->message ?? 'Ein Fehler ist aufgetreten. Bitte versuchen Sie es erneut.',
                        $bookingCreateDto,
                        $form
                    );
                }

                if (false === $bookingResponse->isBookingSuccessful()) {
                    $errorMessage = 'Buchung konnte nicht erstellt werden.';
                    if (null !== $bookingResponse->message && '' !== trim($bookingResponse->message)) {
                        $errorMessage .= ' '.$bookingResponse->message;
                    }

                    return $this->handleApiError(
                        'Booking creation unsuccessful',
                        ['status' => $bookingResponse->status, 'message' => $bookingResponse->message],
                        $errorMessage,
                        $bookingCreateDto,
                        $form
                    );
                }

                // Success: Store booking number in flash and clear session
                $this->addFlash('booking_number', $bookingResponse->transactionNumber);
                $this->clearTravelDataCache($bookingCreateDto);
                $this->bookingService->clearBookingCreateDto($request);

                return $this->hxRedirect($request, $this->generateUrl('app_booking_create_success'));
            } catch (TimeoutException $e) {
                return $this->handleApiError(
                    'Booking creation timeout',
                    [
                        'exception' => $e->getMessage(),
                        'trace' => $e->getTraceAsString(),
                    ],
                    'Die Anfrage hat zu lange gedauert. Bitte versuchen Sie es erneut.',
                    $bookingCreateDto,
                    $form
                );
            } catch (\Exception $e) {
                return $this->handleApiError(
                    'Booking creation exception',
                    [
                        'exception' => $e->getMessage(),
                        'trace' => $e->getTraceAsString(),
                    ],
                    'Ein technischer Fehler ist aufgetreten.',
                    $bookingCreateDto,
                    $form
                );
            }
        }

        return $this->renderStepForm($bookingCreateDto, $form);
    }

    /**
     * Renders the step 4 form with standard template variables.
     */
    private function renderStepForm(BookingDto $bookingCreateDto, FormInterface $form): Response
    {
        // Get complete summary data (pricing, rooms, CMS data)
        $summaryData = $this->summaryDataService->getSummaryData($bookingCreateDto);
        $availableRooms = $bookingCreateDto->travel->getAvailableRooms();
        $groupedSelectedRooms = $this->bookingService->groupRoomSelectionsByType($summaryData['selectedRooms'], $availableRooms);

        return $this->render('booking/create/step_4.html.twig', [
            'bookingCreateDto' => $bookingCreateDto,
            'form' => $form->createView(),
            'participantCount' => $summaryData['participantCount'],
            'pricingData' => $summaryData['pricingData'],
            'cmsData' => $summaryData['cmsData'],
            'assignmentCounts' => $summaryData['assignmentCounts'],
            'groupedSelectedRooms' => $groupedSelectedRooms,
            'participantPrices' => $this->priceCalculator->calculateAllParticipantIndividualPrices($bookingCreateDto),
        ]);
    }

    /**
     * Clears travel data and availability cache after successful booking.
     */
    private function clearTravelDataCache(BookingDto $bookingDto): void
    {
        $dateId = $bookingDto->travel->id;
        $hotelId = $bookingDto->hotelId;

        // Clear availability cache
        $this->cache->delete(sprintf('availability_%d', $dateId));

        // Clear travel data cache (both local and remote variants)
        $this->cache->delete(sprintf('travel_unified_%d_%d_local', $dateId, $hotelId));
        $this->cache->delete(sprintf('travel_unified_%d_%d_remote', $dateId, $hotelId));

        $this->logger->info('Cleared travel data cache after successful booking', [
            'dateId' => $dateId,
            'hotelId' => $hotelId,
        ]);
    }
}