<?php

/**
 * Chill is a software for social workers
 *
 * For the full copyright and license information, please view
 * the LICENSE file that was distributed with this source code.
 */

declare(strict_types=1);

namespace Chill\DocGeneratorBundle\Controller;

use Base64Url\Base64Url;
use ChampsLibres\AsyncUploaderBundle\TempUrl\TempUrlGeneratorInterface;
use Chill\DocGeneratorBundle\Context\ContextManager;
use Chill\DocGeneratorBundle\Context\DocGeneratorContextWithPublicFormInterface;
use Chill\DocGeneratorBundle\Context\Exception\ContextNotFoundException;
use Chill\DocGeneratorBundle\Entity\DocGeneratorTemplate;
use Chill\DocGeneratorBundle\GeneratorDriver\DriverInterface;
use Chill\DocGeneratorBundle\GeneratorDriver\Exception\TemplateException;
use Chill\DocGeneratorBundle\Repository\DocGeneratorTemplateRepository;
use Chill\DocStoreBundle\Entity\StoredObject;
use Chill\MainBundle\Pagination\PaginatorFactory;
use Chill\MainBundle\Serializer\Model\Collection;
use Exception;
use GuzzleHttp\Client;
use GuzzleHttp\Exception\TransferException;
use Psr\Log\LoggerInterface;
use Symfony\Bundle\FrameworkBundle\Controller\AbstractController;
use Symfony\Component\Form\Extension\Core\Type\FileType;
use Symfony\Component\HttpFoundation\File\File;
use Symfony\Component\HttpFoundation\RedirectResponse;
use Symfony\Component\HttpFoundation\Request;
// TODO à mettre dans services
use Symfony\Component\HttpFoundation\Response;
use Symfony\Component\HttpFoundation\StreamedResponse;
use Symfony\Component\HttpKernel\Exception\BadRequestHttpException;
use Symfony\Component\HttpKernel\Exception\HttpException;
use Symfony\Component\HttpKernel\Exception\NotFoundHttpException;
use Symfony\Component\HttpKernel\KernelInterface;
use Symfony\Component\Routing\Annotation\Route;
use Symfony\Component\Serializer\Normalizer\AbstractNormalizer;
use Symfony\Contracts\HttpClient\HttpClientInterface;

final class DocGeneratorTemplateController extends AbstractController
{
    private HttpClientInterface $client;

    private ContextManager $contextManager;

    private DocGeneratorTemplateRepository $docGeneratorTemplateRepository;

    private DriverInterface $driver;

    private KernelInterface $kernel;

    private LoggerInterface $logger;

    private PaginatorFactory $paginatorFactory;

    private TempUrlGeneratorInterface $tempUrlGenerator;

    public function __construct(
        ContextManager $contextManager,
        DocGeneratorTemplateRepository $docGeneratorTemplateRepository,
        DriverInterface $driver,
        LoggerInterface $logger,
        PaginatorFactory $paginatorFactory,
        TempUrlGeneratorInterface $tempUrlGenerator,
        KernelInterface $kernel,
        HttpClientInterface $client
    ) {
        $this->contextManager = $contextManager;
        $this->docGeneratorTemplateRepository = $docGeneratorTemplateRepository;
        $this->driver = $driver;
        $this->logger = $logger;
        $this->paginatorFactory = $paginatorFactory;
        $this->tempUrlGenerator = $tempUrlGenerator;
        $this->kernel = $kernel;
        $this->client = $client;
    }

    /**
     * @Route(
     *     "{_locale}/admin/doc/gen/generate/test/from/{template}/for/{entityClassName}/{entityId}",
     *     name="chill_docgenerator_test_generate_from_template"
     * )
     */
    public function adminTestGenerateDocFromTemplateAction(
        DocGeneratorTemplate $template,
        string $entityClassName,
        int $entityId,
        Request $request
    ): Response {
        return $this->generateDocFromTemplate(
            $template,
            $entityClassName,
            $entityId,
            $request,
            true
        );
    }

    /**
     * @Route(
     *     "{_locale}/doc/gen/generate/from/{template}/for/{entityClassName}/{entityId}",
     *     name="chill_docgenerator_generate_from_template"
     * )
     */
    public function generateDocFromTemplateAction(
        DocGeneratorTemplate $template,
        string $entityClassName,
        int $entityId,
        Request $request
    ): Response {
        return $this->generateDocFromTemplate(
            $template,
            $entityClassName,
            $entityId,
            $request,
            false
        );
    }

    /**
     * @Route(
     *     "/api/1.0/docgen/templates/by-entity/{entityClassName}",
     *     name="chill_docgenerator_templates_for_entity_api"
     * )
     */
    public function listTemplateApiAction(string $entityClassName): Response
    {
        $nb = $this->docGeneratorTemplateRepository->countByEntity($entityClassName);
        $paginator = $this->paginatorFactory->create($nb);
        $entities = $this->docGeneratorTemplateRepository->findByEntity(
            $entityClassName,
            $paginator->getCurrentPageFirstItemNumber(),
            $paginator->getItemsPerPage()
        );

        return $this->json(
            new Collection($entities, $paginator),
            Response::HTTP_OK,
            [],
            [AbstractNormalizer::GROUPS => ['read']]
        );
    }

    /**
     * @Route(
     *     "{_locale}/admin/doc/gen/generate/test/redirect",
     *     name="chill_docgenerator_test_generate_redirect"
     * )
     *
     * @return void
     */
    public function redirectToTestGenerate(Request $request): RedirectResponse
    {
        $template = $request->query->getInt('template');

        if (null === $template) {
            throw new BadRequestHttpException('template parameter is missing');
        }

        $entityClassName = $request->query->get('entityClassName');

        if (null === $entityClassName) {
            throw new BadRequestHttpException('entityClassName is missing');
        }

        $entityId = $request->query->get('entityId');

        if (null === $entityId) {
            throw new BadRequestHttpException('entityId is missing');
        }

        return $this->redirectToRoute(
            'chill_docgenerator_test_generate_from_template',
            ['template' => $template, 'entityClassName' => $entityClassName, 'entityId' => $entityId,
                'returnPath' => $request->query->get('returnPath', '/'), ]
        );
    }

    private function generateDocFromTemplate(
        DocGeneratorTemplate $template,
        string $entityClassName,
        int $entityId,
        Request $request,
        bool $isTest
    ): Response {
        try {
            $context = $this->contextManager->getContextByDocGeneratorTemplate($template);
        } catch (ContextNotFoundException $e) {
            throw new NotFoundHttpException($e->getMessage(), $e);
        }

        $entity = $this->getDoctrine()->getRepository($context->getEntityClass())->find($entityId);

        if (null === $entity) {
            throw new NotFoundHttpException("Entity with classname {$entityClassName} and id {$entityId} is not found");
        }

        $contextGenerationData = [];

        if (
            $context instanceof DocGeneratorContextWithPublicFormInterface
            && $context->hasPublicForm($template, $entity) || $isTest
        ) {
            if ($context instanceof DocGeneratorContextWithPublicFormInterface) {
                $builder = $this->createFormBuilder(
                    array_merge(
                        $context->getFormData($template, $entity),
                        $isTest ? ['test_file' => null] : []
                    )
                );
            } else {
                $builder = $this->createFormBuilder(
                    ['test_file' => null]
                );
            }

            $context->buildPublicForm($builder, $template, $entity);

            if ($isTest) {
                $builder->add('test_file', FileType::class, [
                    'label' => 'Template file',
                    'required' => false,
                ]);
            }

            $form = $builder->getForm()->handleRequest($request);

            if ($form->isSubmitted() && $form->isValid()) {
                $contextGenerationData = $form->getData();
            } elseif (!$form->isSubmitted() || ($form->isSubmitted() && !$form->isValid())) {
                $templatePath = '@ChillDocGenerator/Generator/basic_form.html.twig';
                $templateOptions = ['entity' => $entity, 'form' => $form->createView(),
                    'template' => $template, 'context' => $context, ];

                return $this->render($templatePath, $templateOptions);
            }
        }

        if ($isTest && null !== $contextGenerationData['test_file']) {
            /** @var File $file */
            $file = $contextGenerationData['test_file'];
            $templateResource = fopen($file->getPathname(), 'rb');
        } else {
            $getUrlGen = $this->tempUrlGenerator->generate(
                'GET',
                $template->getFile()->getFilename()
            );

            $data = $this->client->request('GET', $getUrlGen->url);

            $iv = $template->getFile()->getIv(); // iv as an Array
            $ivGoodFormat = pack('C*', ...$iv);  // iv as a String (ok for openssl_decrypt)

            $method = 'AES-256-CBC';

            $key = $template->getFile()->getKeyInfos()['k'];
            $keyGoodFormat = Base64Url::decode($key);

            $dataDecrypted = openssl_decrypt($data->getContent(), $method, $keyGoodFormat, 1, $ivGoodFormat);

            if (false === $dataDecrypted) {
                throw new Exception('Error during Decrypt ', 1);
            }

            if (false === $templateResource = fopen('php://memory', 'r+b')) {
                $this->logger->error('Could not write data to memory');

                throw new HttpException(500);
            }
            fwrite($templateResource, $dataDecrypted);
            rewind($templateResource);
        }

        $datas = $context->getData($template, $entity, $contextGenerationData);

        try {
            $generatedResource = $this->driver->generateFromResource($templateResource, $template->getFile()->getType(), $datas, $template->getFile()->getFilename());
        } catch (TemplateException $e) {
            $msg = implode("\n", $e->getErrors());

            return new Response($msg, 400, [
                'Content-Type' => 'text/plain',
            ]);
        }

        fclose($templateResource);

        if ($isTest) {
            return new StreamedResponse(
                static function () use ($generatedResource) {
                    fpassthru($generatedResource);
                    fclose($generatedResource);
                },
                Response::HTTP_OK,
                [
                    'Content-Transfer-Encoding', 'binary',
                    'Content-Type' => 'application/vnd.oasis.opendocument.text',
                    'Content-Disposition' => sprintf('attachment; filename="%s.odt"', 'generated'),
                    'Content-Length' => fstat($generatedResource)['size'],
                ],
            );
        }

        $genDocName = 'doc_' . sprintf('%010d', mt_rand()) . 'odt';

        $getUrlGen = $this->tempUrlGenerator->generate(
            'PUT',
            $genDocName
        );

        $client = new Client();

        try {
            $putResponse = $client->request('PUT', $getUrlGen->url, [
                'body' => $generatedResource,
            ]);

            if ($putResponse->getStatusCode() === 201) {
                $em = $this->getDoctrine()->getManager();
                $storedObject = new StoredObject();
                $storedObject
                    ->setType($template->getFile()->getType())
                    ->setFilename($genDocName);

                $em->persist($storedObject);

                try {
                    $context->storeGenerated($template, $storedObject, $entity, $contextGenerationData);
                } catch (Exception $e) {
                    $this->logger->error('Could not store the associated document to entity', [
                        'entityClassName' => $entityClassName,
                        'entityId' => $entityId,
                        'contextKey' => $context->getName(),
                    ]);

                    throw $e;
                }

                $em->flush();

                return $this->redirectToRoute('chill_wopi_file_edit', [
                    'fileId' => $storedObject->getUuid(),
                    'returnPath' => $request->query->get('returnPath', '/'),
                ]);
            }
        } catch (TransferException $e) {
            throw $e;
        }

        throw new Exception('Unable to generate document.');
    }
}