<?php

declare(strict_types=1);

/*
 * This file is part of the TYPO3 CMS project.
 *
 * It is free software; you can redistribute it and/or modify it under
 * the terms of the GNU General Public License, either version 2
 * of the License, or any later version.
 *
 * For the full copyright and license information, please read the
 * LICENSE.txt file that was distributed with this source code.
 *
 * The TYPO3 project - inspiring people to share!
 */

namespace TYPO3\CMS\Backend\Http;

use Psr\Http\Message\ResponseInterface;
use Psr\Http\Message\ServerRequestInterface;
use Psr\Http\Server\RequestHandlerInterface;
use TYPO3\CMS\Core\Configuration\ConfigurationManager;
use TYPO3\CMS\Core\Context\Context;
use TYPO3\CMS\Core\Context\DateTimeAspect;
use TYPO3\CMS\Core\Context\VisibilityAspect;
use TYPO3\CMS\Core\Core\Bootstrap;
use TYPO3\CMS\Core\Core\SystemEnvironmentBuilder;
use TYPO3\CMS\Core\Http\AbstractApplication;
use TYPO3\CMS\Core\Http\RedirectResponse;

/**
 * Entry point for the TYPO3 Backend (HTTP requests)
 */
class Application extends AbstractApplication
{
    /**
     * @var ConfigurationManager
     */
    protected $configurationManager;

    /**
     * @var Context
     */
    protected $context;

    public function __construct(
        RequestHandlerInterface $requestHandler,
        ConfigurationManager $configurationManager,
        Context $context
    ) {
        $this->requestHandler = $requestHandler;
        $this->configurationManager = $configurationManager;
        $this->context = $context;
    }

    public function handle(ServerRequestInterface $request): ResponseInterface
    {
        if (!Bootstrap::checkIfEssentialConfigurationExists($this->configurationManager)) {
            return $this->installToolRedirect();
        }

        // Add applicationType attribute to request: This is backend and maybe backend ajax.
        $applicationType = SystemEnvironmentBuilder::REQUESTTYPE_BE;
        if (strpos($request->getUri()->getPath(), '/typo3/ajax/') !== false || strpos($request->getQueryParams()['route'] ?? '', '/ajax/') === 0) {
            $applicationType |= SystemEnvironmentBuilder::REQUESTTYPE_AJAX;
        }
        $request = $request->withAttribute('applicationType', $applicationType);

        // Set up the initial context
        $this->initializeContext();
        return parent::handle($request);
    }

    /**
     * Create a PSR-7 Response that redirects to the install tool
     *
     * @return ResponseInterface
     */
    protected function installToolRedirect(): ResponseInterface
    {
        return new RedirectResponse('./install.php', 302);
    }

    /**
     * Initializes the Context used for accessing data and finding out the current state of the application
     */
    protected function initializeContext(): void
    {
        $this->context->setAspect('date', new DateTimeAspect(new \DateTimeImmutable('@' . $GLOBALS['EXEC_TIME'])));
        $this->context->setAspect('visibility', new VisibilityAspect(true, true));
    }
}
