<?php

/*
 * This file is part of the `liip/LiipImagineBundle` project.
 *
 * (c) https://github.com/liip/LiipImagineBundle/graphs/contributors
 *
 * For the full copyright and license information, please view the LICENSE.md
 * file that was distributed with this source code.
 */

namespace Liip\ImagineBundle\Controller;

use Imagine\Exception\RuntimeException;
use Liip\ImagineBundle\Config\Controller\ControllerConfig;
use Liip\ImagineBundle\Exception\Binary\Loader\NotLoadableException;
use Liip\ImagineBundle\Exception\Imagine\Filter\NonExistingFilterException;
use Liip\ImagineBundle\Imagine\Cache\Helper\PathHelper;
use Liip\ImagineBundle\Imagine\Cache\SignerInterface;
use Liip\ImagineBundle\Imagine\Data\DataManager;
use Liip\ImagineBundle\Service\FilterService;
use Symfony\Component\HttpFoundation\Exception\BadRequestException;
use Symfony\Component\HttpFoundation\RedirectResponse;
use Symfony\Component\HttpFoundation\Request;
use Symfony\Component\HttpKernel\Exception\BadRequestHttpException;
use Symfony\Component\HttpKernel\Exception\NotFoundHttpException;
use Symfony\Component\HttpKernel\Kernel;

class ImagineController
{
    /**
     * @var FilterService
     */
    private $filterService;

    /**
     * @var DataManager
     */
    private $dataManager;

    /**
     * @var SignerInterface
     */
    private $signer;

    /**
     * @var ControllerConfig
     */
    private $controllerConfig;

    public function __construct(
        FilterService $filterService,
        DataManager $dataManager,
        SignerInterface $signer,
        ?ControllerConfig $controllerConfig = null
    ) {
        $this->filterService = $filterService;
        $this->dataManager = $dataManager;
        $this->signer = $signer;

        if (null === $controllerConfig) {
            @trigger_error(sprintf(
                'Instantiating "%s" without a forth argument of type "%s" is deprecated since 2.2.0 and will be required in 3.0.', self::class, ControllerConfig::class
            ), E_USER_DEPRECATED);
        }

        $this->controllerConfig = $controllerConfig ?? new ControllerConfig(301);
    }

    /**
     * This action applies a given filter to a given image, saves the image and redirects the browser to the stored
     * image.
     *
     * The resulting image is cached so subsequent requests will redirect to the cached image instead applying the
     * filter and storing the image again.
     *
     * @param string $path
     * @param string $filter
     *
     * @throws RuntimeException
     * @throws NotFoundHttpException
     *
     * @return RedirectResponse
     */
    public function filterAction(Request $request, $path, $filter)
    {
        $path = PathHelper::urlPathToFilePath($path);
        $resolver = $request->get('resolver');

        return $this->createRedirectResponse(function () use ($path, $filter, $resolver, $request) {
            return $this->filterService->getUrlOfFilteredImage(
                $path,
                $filter,
                $resolver,
                $this->isWebpSupported($request)
            );
        }, $path, $filter);
    }

    /**
     * This action applies a given filter -merged with additional runtime filters- to a given image, saves the image and
     * redirects the browser to the stored image.
     *
     * The resulting image is cached so subsequent requests will redirect to the cached image instead applying the
     * filter and storing the image again.
     *
     * @param string $hash
     * @param string $path
     * @param string $filter
     *
     * @throws RuntimeException
     * @throws BadRequestHttpException
     * @throws NotFoundHttpException
     *
     * @return RedirectResponse
     */
    public function filterRuntimeAction(Request $request, $hash, $path, $filter)
    {
        $resolver = $request->get('resolver');
        $path = PathHelper::urlPathToFilePath($path);
        $runtimeConfig = $this->getFiltersBc($request);

        if (true !== $this->signer->check($hash, $path, $runtimeConfig)) {
            throw new BadRequestHttpException(sprintf('Signed url does not pass the sign check for path "%s" and filter "%s" and runtime config %s', $path, $filter, json_encode($runtimeConfig)));
        }

        return $this->createRedirectResponse(function () use ($path, $filter, $runtimeConfig, $resolver, $request) {
            return $this->filterService->getUrlOfFilteredImageWithRuntimeFilters(
                $path,
                $filter,
                $runtimeConfig,
                $resolver,
                $this->isWebpSupported($request)
            );
        }, $path, $filter, $hash);
    }

    private function getFiltersBc(Request $request): array
    {
        if (version_compare(Kernel::VERSION, '5.1', '>=')) {
            try {
                return $request->query->all('filters');
            } catch (BadRequestException $e) {
                // for strict BC - BadRequestException seems more suited to this situation.
                // remove the try-catch in version 3
                throw new NotFoundHttpException(sprintf('Filters must be an array. Value was "%s"', $request->query->get('filters')));
            }
        }

        $runtimeConfig = $request->query->get('filters', []);

        if (!\is_array($runtimeConfig)) {
            throw new NotFoundHttpException(sprintf('Filters must be an array. Value was "%s"', $runtimeConfig));
        }

        return $runtimeConfig;
    }

    private function createRedirectResponse(\Closure $url, string $path, string $filter, ?string $hash = null): RedirectResponse
    {
        try {
            return new RedirectResponse($url(), $this->controllerConfig->getRedirectResponseCode());
        } catch (NotLoadableException $exception) {
            if (null !== $this->dataManager->getDefaultImageUrl($filter)) {
                return new RedirectResponse($this->dataManager->getDefaultImageUrl($filter));
            }

            throw new NotFoundHttpException(sprintf('Source image for path "%s" could not be found', $path), $exception);
        } catch (NonExistingFilterException $exception) {
            throw new NotFoundHttpException(sprintf('Requested non-existing filter "%s"', $filter), $exception);
        } catch (RuntimeException $exception) {
            throw new \RuntimeException(vsprintf('Unable to create image for path "%s" and filter "%s". Message was "%s"', [$hash ? sprintf('%s/%s', $hash, $path) : $path, $filter, $exception->getMessage()]), 0, $exception);
        }
    }

    private function isWebpSupported(Request $request): bool
    {
        return false !== mb_stripos($request->headers->get('accept', ''), 'image/webp');
    }
}