<?php

namespace Opentalent\OtTemplating\Page;

use Opentalent\OtCore\Page\OtPageRepository;
use Psr\Http\Message\ResponseInterface;
use Psr\Http\Message\ServerRequestInterface;
use TYPO3\CMS\Core\Error\PageErrorHandler\PageContentErrorHandler;
use TYPO3\CMS\Core\Error\PageErrorHandler\PageErrorHandlerInterface;
use TYPO3\CMS\Core\Http\HtmlResponse;
use TYPO3\CMS\Core\Utility\GeneralUtility;
use TYPO3\CMS\Fluid\View\TemplateView;
use TYPO3Fluid\Fluid\View\ViewInterface;

class ErrorHandler implements PageErrorHandlerInterface
{
    const TEMPLATES_ROOT_PATHS = 'EXT:ot_templating/Resources/Private/Templates';
    const LAYOUTS_ROOT_PATHS = 'EXT:ot_templating/Resources/Private/Layouts';
    const PARTIALS_ROOT_PATHS = 'EXT:ot_templating/Resources/Private/Partials';

    const TEMPLATE_FILES = [
        403 => self::TEMPLATES_ROOT_PATHS . '/Page/Error/403.html',
        404 => self::TEMPLATES_ROOT_PATHS . '/Page/Error/404.html',
        500 => self::TEMPLATES_ROOT_PATHS . '/Page/Error/500.html'
    ];

    const REDIRECT_FALLBACK = 'https://opentalent.fr';

    /**
     * Status code of the response
     * @var int
     */
    protected $statusCode;

    /**
     * Configuration of the error handler as set in site configuration.
     * @var array
     */
    protected $errorHandlerConfiguration;

    /**
     * @var ViewInterface
     */
    protected $view;

    public function __construct(int $statusCode, array $configuration)
    {
        $this->statusCode = $statusCode;
        $this->errorHandlerConfiguration = $configuration;

        $this->view = GeneralUtility::makeInstance(TemplateView::class);
        $this->view->setTemplateRootPaths([self::TEMPLATES_ROOT_PATHS]);
        $this->view->setLayoutRootPaths([self::LAYOUTS_ROOT_PATHS]);
        $this->view->setPartialRootPaths([self::PARTIALS_ROOT_PATHS]);
        $this->view->setTemplatePathAndFilename(
            GeneralUtility::getFileAbsFileName(self::TEMPLATE_FILES[$statusCode])
        );
    }

    /**
     * @param ServerRequestInterface $request
     * @param string $message
     * @param array $reasons
     * @return ResponseInterface
     */
    public function handlePageError(
        ServerRequestInterface $request,
        string $message,
        array $reasons = []
    ): ResponseInterface {

        $homeUri = "https://opentalent.fr";
        $title = 'Page introuvable';

        // This variable role is to prevent redirection loop,
        $isCircular = preg_match('/.*\/page-introuvable/', $request->getUri()->getPath());

        $pageRepository = GeneralUtility::makeInstance(OtPageRepository::class);
        $site = $pageRepository->getCurrentSite();

        if ($site && !$isCircular){
            $homeUri = $site->getBase();
            $rootUid = $site->getRootPageId();

            $rootPage = $pageRepository->getPage($rootUid);
            if (!empty($rootPage)) {

                $title = $rootPage['title'];

                $subPages = $pageRepository->getAllSubpagesForPage($rootUid, true);
                foreach ($subPages as $page) {
                    if ($page['slug'] == '/page-introuvable') {

                        $errorHandler = GeneralUtility::makeInstance(
                            PageContentErrorHandler::class,
                            $this->statusCode,
                            [
                                'errorHandler' => 'Page',
                                'errorContentSource' => 't3://page?uid=' . $page['uid']
                            ]
                        );
                        return $errorHandler->handlePageError($request, $message, $reasons);
                    }
                }
            } else {
                $title = "Page inexistante";
                $homeUri = self::REDIRECT_FALLBACK;
            }

        }

        // At this point, the site has not been determined or
        //   this site has no subpage with slug '/page-introuvable'
        $this->view->assignMultiple([
            'request' => $request,
            'message' => $message,
            'reasons' => $reasons,
            'homeUri' => $homeUri,
            'siteTitle' => $title
        ]);

        return new HtmlResponse($this->view->render(), $this->statusCode);
    }

}