<?php

declare(strict_types=1);

namespace App\Controller\Voucher;

use App\Form\Model\VoucherPurchaseDto;
use App\Htmx\HxTrait;
use App\Service\VoucherPurchaseSessionManager;
use App\Service\VoucherThumbnailResolver;
use Symfony\Bundle\FrameworkBundle\Controller\AbstractController;
use Symfony\Component\HttpFoundation\RedirectResponse;
use Symfony\Component\HttpFoundation\Request;
use Symfony\Component\HttpFoundation\Response;

/**
 * Shared base for the steps of the voucher purchase flow.
 */
abstract class AbstractVoucherPurchaseController extends AbstractController
{
    use HxTrait;

    public const array STEP_ROUTES = [
        1 => 'app_voucher_step_1',
        2 => 'app_voucher_step_2',
        3 => 'app_voucher_step_3',
    ];

    public function __construct(
        protected readonly VoucherPurchaseSessionManager $sessionManager,
        protected readonly VoucherThumbnailResolver $thumbnailResolver,
    ) {
    }

    protected function createSessionExpiredResponse(Request $request): Response
    {
        $this->addFlash('error', 'Deine Sitzung ist abgelaufen. Bitte starte den Gutscheinkauf neu.');

        return $this->htmxRedirect($request, $this->generateUrl('app_voucher_error'));
    }

    protected function validateStepAccess(VoucherPurchaseDto $dto, int $expectedStep): ?RedirectResponse
    {
        if ($expectedStep > $dto->currentStep) {
            $this->addFlash('error', 'Bitte erst die vorherigen Schritte abschließen.');

            return $this->redirectToStep($dto->currentStep);
        }

        return null;
    }

    protected function redirectToStep(int $step): RedirectResponse
    {
        return $this->redirectToRoute(self::STEP_ROUTES[$step] ?? self::STEP_ROUTES[1]);
    }

    /**
     * Context shared by every step template: the sidebar summary and the step pagination.
     *
     * @return array<string, mixed>
     */
    protected function createStepContext(VoucherPurchaseDto $dto): array
    {
        return [
            'voucher' => $dto,
            'voucherThumbnail' => null !== $dto->template ? $this->thumbnailResolver->resolve($dto->template) : null,
            'stepRoutes' => self::STEP_ROUTES,
        ];
    }
}