<?php

declare(strict_types=1);

namespace App\Controller\Groups;

use App\Entity\Groups\AccommodationBooking;
use App\Form\Model\OfferAcceptDto;
use App\Form\OfferAcceptConfirmationType;
use App\Htmx\HxTrait;
use App\Model\AccommodationBookingContext;
use App\Repository\Groups\AccommodationBookingRepository;
use App\Service\AccommodationBookingBreakdownCalculator;
use App\Service\AccommodationBookingLinkSigner;
use App\Service\AccommodationBookingService;
use App\Service\AccommodationTermsUrlProvider;
use Symfony\Bundle\FrameworkBundle\Controller\AbstractController;
use Symfony\Component\HttpFoundation\RedirectResponse;
use Symfony\Component\HttpFoundation\Request;
use Symfony\Component\HttpFoundation\Response;
use Symfony\Component\Routing\Attribute\Route;

class OfferController extends AbstractController
{
    use HxTrait;

    public function __construct(
        private readonly AccommodationBookingRepository $bookingRepository,
        private readonly AccommodationBookingLinkSigner $linkSigner,
        private readonly AccommodationBookingBreakdownCalculator $breakdownCalculator,
        private readonly AccommodationBookingService $bookingService,
        private readonly AccommodationTermsUrlProvider $termsUrlProvider,
    ) {
    }

    /**
     * Signed-link entry point: validates the `t`/`_hash` query params once,
     * authorizes the session for this booking, and redirects to the plain
     * (session-gated) offer page — nothing downstream needs the signature again.
     */
    #[Route(path: '/groups/booking/offer/{uuid}', name: 'app_groups_booking_offer', methods: ['GET'])]
    public function access(string $uuid, Request $request): Response
    {
        $booking = $this->bookingRepository->findOneBy(['uuid' => $uuid]);

        if (null === $booking || false === $this->linkSigner->isValidLinkRequest($request, $booking)) {
            return $this->render('groups/booking/offer_unavailable.html.twig');
        }

        if (!$this->isCustomerVisible($booking)) {
            return $this->render('groups/booking/offer_unavailable.html.twig');
        }

        $this->linkSigner->authorizeSession($request, $booking);

        return new RedirectResponse($this->generateUrl('app_groups_booking_offer_view', ['uuid' => $uuid]));
    }

    #[Route(path: '/groups/booking/offer/{uuid}/view', name: 'app_groups_booking_offer_view', methods: ['GET'])]
    public function view(string $uuid, Request $request): Response
    {
        $booking = $this->bookingRepository->findOneBy(['uuid' => $uuid]);

        if (null === $booking || false === $this->linkSigner->isSessionAuthorized($request, $booking)) {
            return $this->render('groups/booking/offer_unavailable.html.twig');
        }

        if (!$this->isCustomerVisible($booking)) {
            return $this->render('groups/booking/offer_unavailable.html.twig');
        }

        $accommodation = $booking->getAccommodation() ?? throw $this->createNotFoundException('Booking has no accommodation.');
        $priceBreakdown = $this->breakdownCalculator->compute($booking);

        $ctx = new AccommodationBookingContext(
            accommodation: $accommodation,
            hotelCmsData: $this->bookingService->loadHotelCmsData($accommodation),
            priceBreakdown: $priceBreakdown,
        );

        return $this->render('groups/booking/offer.html.twig', [
            'booking' => $booking,
            'priceBreakdown' => $priceBreakdown,
            'ctx' => $ctx,
        ]);
    }

    #[Route(path: '/groups/booking/offer/{uuid}/confirm', name: 'app_groups_booking_offer_confirm', methods: ['GET', 'POST'])]
    public function confirm(string $uuid, Request $request): Response
    {
        $booking = $this->bookingRepository->findOneBy(['uuid' => $uuid]);

        if (null === $booking || false === $this->linkSigner->isSessionAuthorized($request, $booking)) {
            return $this->redirectToOfferPage($request, $uuid);
        }

        // Offen is the one status that means an offer is out and awaiting acceptance, so it
        // is the whole guard — mirroring acceptBooking(), which no-ops on anything else.
        if (!$booking->isOpen()) {
            return $this->redirectToOfferPage($request, $uuid);
        }

        $dto = new OfferAcceptDto(remarks: $booking->getRemarks());
        $confirmationForm = $this->createForm(OfferAcceptConfirmationType::class, $dto, [
            'terms_url' => $this->termsUrlProvider->forAccommodation($booking->getAccommodation()),
        ]);
        $confirmationForm->handleRequest($request);

        if ($confirmationForm->isSubmitted() && $confirmationForm->isValid()) {
            // The textarea is prefilled, so the submitted value is the complete remark —
            // an emptied field arrives as null and must clear the stored one, not keep it.
            $this->bookingService->acceptBooking($booking, $dto->remarks ?? '');
            $this->addFlash('success', 'Deine Buchung ist bei uns eingegangen. Sobald sie geprüft ist, erhältst du eine Bestätigung per E-Mail.');

            return $this->redirectToOfferPage($request, $uuid);
        }

        return $this->render('groups/booking/_offer_accept_confirmation_modal.html.twig', [
            'booking' => $booking,
            'confirmationForm' => $confirmationForm,
        ]);
    }

    /**
     * A draft and an inquiry the office has not worked through yet are not ready to be
     * shown, and a discarded booking must not be viewable any more — in all three cases
     * the link behaves as if it had expired.
     */
    private function isCustomerVisible(AccommodationBooking $booking): bool
    {
        return $booking->isCustomerAccessible() && !$booking->isRequested() && !$booking->isDiscarded();
    }

    /**
     * Sends the browser to a full reload of the (non-modal) offer page — this is
     * triggered from an htmx-loaded modal, so a plain render/redirect here would
     * get appended as an inert HTML fragment instead of actually navigating.
     */
    private function redirectToOfferPage(Request $request, string $uuid): Response
    {
        $url = $this->generateUrl('app_groups_booking_offer_view', ['uuid' => $uuid]);

        return $this->htmxRedirect($request, $url);
    }
}