<?php

declare(strict_types=1);

namespace App\Controller\Admin\AccommodationBooking;

use App\Entity\Groups\AccommodationBooking;
use App\Enum\Groups\AccommodationBookingPeriodPosition;
use App\Exception\ImplausibleBookingPriceException;
use App\Form\Admin\Groups\AccommodationBookingPeriodType;
use App\Form\Model\AccommodationBookingPeriodDto;
use App\Form\Model\AccommodationBookingPeriodLineDto;
use App\Htmx\HxTrait;
use App\Service\AccommodationBookingService;
use Psr\Log\LoggerInterface;
use Symfony\Bundle\FrameworkBundle\Controller\AbstractController;
use Symfony\Component\Form\FormError;
use Symfony\Component\Form\FormInterface;
use Symfony\Component\HttpFoundation\Request;
use Symfony\Component\HttpFoundation\Response;
use Symfony\Component\Routing\Attribute\Route;
use Symfony\Component\Security\Http\Attribute\IsGranted;

/**
 * Splits nights off the start or the end of the stay, for a part of the group that arrives
 * early or leaves late and is quoted as free-form lines instead of the booking's parameters.
 * Each side can be split once; the period can be resized afterwards through its edit modal.
 */
#[IsGranted('ROLE_GROUPS_MANAGER')]
class SplitPeriodController extends AbstractController
{
    use HxTrait;
    use RedirectsToEditFormTrait;

    public function __construct(
        private readonly AccommodationBookingService $bookingService,
        private readonly LoggerInterface $logger,
    ) {
    }

    #[Route(
        '/admin/accommodation-booking/{id}/period/split/{position}',
        name: 'app_admin_accommodationbooking_period_split',
        requirements: ['position' => 'leading|trailing'],
    )]
    public function index(AccommodationBooking $booking, AccommodationBookingPeriodPosition $position, Request $request): Response
    {
        // One period per side. The edit page only offers the free sides, so this catches a page
        // that was open while somebody else split the same side.
        if (!$booking->canSplitOffPeriod($position)) {
            $this->addFlash('error', AccommodationBookingPeriodPosition::Leading === $position
                ? 'Am Anfang wurde bereits ein Zeitraum abgeteilt.'
                : 'Am Ende wurde bereits ein Zeitraum abgeteilt.');

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

        $dto = new AccommodationBookingPeriodDto(1, [new AccommodationBookingPeriodLineDto()]);
        $form = $this->createForm(AccommodationBookingPeriodType::class, $dto, [
            'currency' => $booking->getPricingCurrency() ?? $booking->getAccommodation()?->getCurrency() ?? 'EUR',
            'hx_post' => $request->getRequestUri(),
        ]);
        $form->handleRequest($request);

        if ($form->isSubmitted() && $form->isValid()) {
            try {
                $violations = $this->bookingService->splitOffPeriod($booking, $position, $dto);

                foreach ($violations as $violation) {
                    $form->addError(new FormError((string) $violation->getMessage()));
                }

                if (0 === count($violations)) {
                    $this->addFlash('success', 'Der Zeitraum wurde abgeteilt.');

                    $this->logger->info('Split off a period of accommodation booking', [
                        'id' => $booking->getId(),
                        'position' => $position->value,
                        'nights' => $dto->nights,
                    ]);

                    return $this->htmxRedirect($request, $this->editUrl($booking, $request));
                }
            } catch (ImplausibleBookingPriceException $e) {
                $this->logger->error('Refused to split off a period over an implausible accommodation booking total', [
                    'exception' => $e,
                    'id' => $booking->getId(),
                ]);
                $form->addError(new FormError(ImplausibleBookingPriceException::FORM_ERROR_MESSAGE));
            }
        }

        return $this->renderModal($booking, $position, $form);
    }

    /** @param FormInterface<AccommodationBookingPeriodDto> $form */
    private function renderModal(AccommodationBooking $booking, AccommodationBookingPeriodPosition $position, FormInterface $form): Response
    {
        return $this->render('admin/accommodation_booking/modal_period.html.twig', [
            'booking' => $booking,
            'form' => $form,
            'title' => AccommodationBookingPeriodPosition::Leading === $position
                ? 'Zeitraum am Anfang abteilen'
                : 'Zeitraum am Ende abteilen',
        ]);
    }
}