<?php

namespace Opentalent\OtTemplating\Page;

use Psr\Http\Message\ResponseInterface;
use Psr\Http\Message\ServerRequestInterface;
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'
    ];

    /**
     * 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 {

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

        $this->view->assignMultiple([
            'request' => $request,
            'message' => $message,
            'reasons' => $reasons,
            'homeUri' => $baseUri,
            'siteTitle' => $site->getConfiguration()['websiteTitle']
        ]);

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