<?php

declare(strict_types=1);

namespace App\Controller\Booking;

use App\Form\Model\BookingCreateDto;
use Symfony\Component\HttpFoundation\RedirectResponse;

/**
 * Provides common functionality for booking creation controllers.
 *
 * This trait contains shared validation and redirect logic used across
 * all booking creation steps to ensure consistent behavior and reduce
 * code duplication.
 */
trait BookingCreateTrait
{
    /**
     * Validates step access and returns redirect response if necessary.
     *
     * @return RedirectResponse|null Returns redirect response if validation fails, null if access is allowed
     */
    private function validateStepAccess(BookingCreateDto $bookingCreateDto, int $expectedStep): ?RedirectResponse
    {
        // Allow access to current step or any previous step
        if ($expectedStep > $bookingCreateDto->currentStep) {
            $this->addFlash('error', 'Bitte erst die vorherigen Schritte abschließen.');

            return $this->redirectToCurrentStep($bookingCreateDto);
        }

        return null;
    }

    /**
     * Redirects to the current step based on the DTO's currentStep.
     */
    private function redirectToCurrentStep(BookingCreateDto $bookingCreateDto): RedirectResponse
    {
        $route = match ($bookingCreateDto->currentStep) {
            2 => 'app_booking_create_step_2',
            3 => 'app_booking_create_step_3',
            default => 'app_booking_create_step_1',
        };

        return $this->redirectToRoute($route);
    }
}