<?php

namespace App\Controller;

use App\Entity\Company;
use App\Entity\Reseller;
use App\Security\TenantContext;
use App\Service\BrandingService;
use App\Service\TenantResolver;
use Doctrine\ORM\EntityManagerInterface;
use League\Flysystem\FilesystemOperator;
use Symfony\Component\DependencyInjection\Attribute\Autowire;
use Symfony\Component\HttpFoundation\File\UploadedFile;
use Symfony\Component\HttpFoundation\JsonResponse;
use Symfony\Component\HttpFoundation\Request;
use Symfony\Component\HttpFoundation\Response;
use Symfony\Component\HttpKernel\Exception\AccessDeniedHttpException;
use Symfony\Component\HttpKernel\Exception\BadRequestHttpException;
use Symfony\Component\HttpKernel\Exception\NotFoundHttpException;
use Symfony\Component\Routing\Attribute\Route;
use Symfony\Component\Security\Http\Attribute\IsGranted;
use Symfony\Component\Uid\Uuid;

/**
 * White-Label-Branding pflegen: Reseller-Admin brandet seinen Reseller,
 * Firmen-Admin seine Firma (Farben, Tagline, Logo). Plus öffentliche Logo-Auslieferung.
 */
final class BrandingAdminController
{
    public function __construct(
        private readonly EntityManagerInterface $em,
        private readonly TenantContext $tenant,
        private readonly TenantResolver $resolver,
        private readonly BrandingService $branding,
        #[Autowire(service: 'card_assets.storage')]
        private readonly FilesystemOperator $cardAssets,
    ) {
    }

    #[Route('/api/my-branding', name: 'my_branding_get', methods: ['GET'])]
    #[IsGranted('ROLE_COMPANY_ADMIN')]
    public function get(): JsonResponse
    {
        return new JsonResponse($this->serialize());
    }

    #[Route('/api/my-branding', name: 'my_branding_put', methods: ['PUT'])]
    #[IsGranted('ROLE_COMPANY_ADMIN')]
    public function put(Request $request): JsonResponse
    {
        [, $entity] = $this->target();
        $data = json_decode($request->getContent(), true) ?? [];
        $cfg = $entity->getBrandingConfig();

        foreach (['primaryColor', 'primaryColorDark', 'primaryColorSoft'] as $key) {
            if (\array_key_exists($key, $data)) {
                $hex = $this->hex($data[$key] ?? null);
                if (null !== $hex) {
                    $cfg[$key] = $hex;
                } else {
                    unset($cfg[$key]);
                }
            }
        }
        if (\array_key_exists('tagline', $data)) {
            $tag = trim((string) ($data['tagline'] ?? ''));
            if ('' !== $tag) {
                $cfg['tagline'] = mb_substr($tag, 0, 120);
            } else {
                unset($cfg['tagline']);
            }
        }

        $entity->setBrandingConfig($cfg);
        $this->em->flush();

        return new JsonResponse($this->serialize());
    }

    #[Route('/api/my-branding/logo', name: 'my_branding_logo_post', methods: ['POST'])]
    #[IsGranted('ROLE_COMPANY_ADMIN')]
    public function uploadLogo(Request $request): JsonResponse
    {
        [$scope, $entity] = $this->target();
        $file = $request->files->get('file');
        if (!$file instanceof UploadedFile) {
            throw new BadRequestHttpException('Keine Datei (Feld "file").');
        }
        $ext = strtolower((string) $file->getClientOriginalExtension());
        if (!\in_array($ext, ['png', 'jpg', 'jpeg', 'svg'], true)) {
            throw new BadRequestHttpException('Nur PNG, JPG oder SVG erlaubt.');
        }

        $cfg = $entity->getBrandingConfig();
        $old = \is_string($cfg['logoKey'] ?? null) ? $cfg['logoKey'] : null;
        $key = sprintf('branding/%s-%s/logo-%s.%s', $scope, $entity->getId()->toRfc4122(), bin2hex(random_bytes(4)), $ext);
        $this->cardAssets->write($key, (string) file_get_contents($file->getPathname()));
        if (null !== $old && $old !== $key && $this->cardAssets->fileExists($old)) {
            $this->cardAssets->delete($old);
        }
        $cfg['logoKey'] = $key;
        $entity->setBrandingConfig($cfg);
        $this->em->flush();

        return new JsonResponse($this->serialize(), 201);
    }

    #[Route('/api/my-branding/logo', name: 'my_branding_logo_delete', methods: ['DELETE'])]
    #[IsGranted('ROLE_COMPANY_ADMIN')]
    public function deleteLogo(): JsonResponse
    {
        [, $entity] = $this->target();
        $cfg = $entity->getBrandingConfig();
        $key = \is_string($cfg['logoKey'] ?? null) ? $cfg['logoKey'] : null;
        if (null !== $key && $this->cardAssets->fileExists($key)) {
            $this->cardAssets->delete($key);
        }
        unset($cfg['logoKey']);
        $entity->setBrandingConfig($cfg);
        $this->em->flush();

        return new JsonResponse($this->serialize());
    }

    /** Öffentliche Logo-Auslieferung (vom Branding-Endpoint verlinkt). */
    #[Route('/api/branding/logo/{scope}/{id}.png', name: 'branding_logo', methods: ['GET'])]
    public function logo(string $scope, string $id): Response
    {
        $entity = $this->load($scope, $id);
        $key = \is_string($entity->getBrandingConfig()['logoKey'] ?? null) ? $entity->getBrandingConfig()['logoKey'] : null;
        if (null === $key || !$this->cardAssets->fileExists($key)) {
            throw new NotFoundHttpException('Kein Logo.');
        }
        $bytes = $this->cardAssets->read($key);
        $mime = str_ends_with($key, '.svg') ? 'image/svg+xml' : (str_ends_with($key, '.png') ? 'image/png' : 'image/jpeg');

        return new Response($bytes, 200, ['Content-Type' => $mime, 'Cache-Control' => 'public, max-age=86400']);
    }

    /** @return array{0:string,1:Company|Reseller} */
    private function target(): array
    {
        $company = $this->tenant->getCompany();
        if ($company instanceof Company) {
            return [BrandingService::SCOPE_COMPANY, $company];
        }
        $reseller = $this->tenant->getReseller();
        if ($reseller instanceof Reseller) {
            return [BrandingService::SCOPE_RESELLER, $reseller];
        }
        throw new AccessDeniedHttpException('Kein Branding-Kontext.');
    }

    private function load(string $scope, string $id): Company|Reseller
    {
        $uuid = Uuid::fromString($id);
        $entity = BrandingService::SCOPE_COMPANY === $scope
            ? $this->em->getRepository(Company::class)->find($uuid)
            : $this->em->getRepository(Reseller::class)->find($uuid);
        if (!$entity instanceof Company && !$entity instanceof Reseller) {
            throw new NotFoundHttpException('Nicht gefunden.');
        }

        return $entity;
    }

    /** @return array<string, mixed> */
    private function serialize(): array
    {
        [$scope, $entity] = $this->target();
        $cfg = $entity->getBrandingConfig();
        $tenant = $entity instanceof Company
            ? new \App\Service\ResolvedTenant(\App\Service\ResolvedTenant::KIND_COMPANY, $entity->getReseller(), $entity)
            : new \App\Service\ResolvedTenant(\App\Service\ResolvedTenant::KIND_RESELLER, $entity);
        $host = $entity instanceof Company ? $this->resolver->companyHost($entity) : $this->resolver->resellerHost($entity);

        return [
            'scope' => $scope,
            'name' => $entity->getName(),
            'address' => $host,
            'primaryColor' => $cfg['primaryColor'] ?? '#f58220',
            'primaryColorDark' => $cfg['primaryColorDark'] ?? '#d96500',
            'primaryColorSoft' => $cfg['primaryColorSoft'] ?? '#fff2e7',
            'tagline' => $cfg['tagline'] ?? '',
            'hasLogo' => '' !== (string) ($cfg['logoKey'] ?? ''),
            'logoUrl' => $this->branding->logoUrl($tenant),
        ];
    }

    private function hex(mixed $value): ?string
    {
        return (\is_string($value) && preg_match('/^#[0-9a-fA-F]{6}$/', $value)) ? strtolower($value) : null;
    }
}