<?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\Install\Controller;

use Psr\Http\Message\ResponseInterface;
use Psr\Http\Message\ServerRequestInterface;
use TYPO3\CMS\Backend\Template\ModuleTemplateFactory;
use TYPO3\CMS\Core\Authentication\BackendUserAuthentication;
use TYPO3\CMS\Core\Http\RedirectResponse;
use TYPO3\CMS\Core\Routing\BackendEntryPointResolver;
use TYPO3\CMS\Core\Utility\GeneralUtility;
use TYPO3\CMS\Install\Service\SessionService;

/**
 * Backend module controller to the Install Tool. Sets an Install Tool session
 * marked as "initialized by a valid system administrator backend user" and
 * redirects to the Install Tool entry point.
 *
 * This is a classic backend module that does not interfere with other code
 * within the Install Tool, it can be seen as a facade around Install Tool just
 * to embed the Install Tool in backend.
 *
 * @internal This class is a specific controller implementation and is not considered part of the Public TYPO3 API.
 */
class BackendModuleController
{
    public function __construct(
        protected readonly ModuleTemplateFactory $moduleTemplateFactory,
        protected readonly SessionService $sessionService
    ) {}

    /**
     * Initialize session and redirect to "maintenance"
     */
    public function maintenanceAction(ServerRequestInterface $request): ResponseInterface
    {
        return $this->setAuthorizedAndRedirect('maintenance', $request);
    }

    /**
     * Initialize session and redirect to "settings"
     */
    public function settingsAction(ServerRequestInterface $request): ResponseInterface
    {
        return $this->setAuthorizedAndRedirect('settings', $request);
    }

    /**
     * Initialize session and redirect to "upgrade"
     */
    public function upgradeAction(ServerRequestInterface $request): ResponseInterface
    {
        return $this->setAuthorizedAndRedirect('upgrade', $request);
    }

    /**
     * Initialize session and redirect to "environment"
     */
    public function environmentAction(ServerRequestInterface $request): ResponseInterface
    {
        return $this->setAuthorizedAndRedirect('environment', $request);
    }

    /**
     * Starts / updates the session and redirects to the Install Tool
     * with given action.
     */
    protected function setAuthorizedAndRedirect(string $controller, ServerRequestInterface $request): ResponseInterface
    {
        $redirectParameters = [
            'install' => [
                'controller' => $controller,
                'context' => 'backend',
            ],
        ];

        $backendUser = $this->getBackendUser();
        $userTS = $backendUser->getTSConfig();

        $themeDisabled = $userTS['setup.']['fields.']['theme.']['disabled'] ?? '0';
        $theme = $GLOBALS['BE_USER']->uc['theme'] ?? $userTS['setup.']['fields.']['theme'] ?? 'auto';
        if ($themeDisabled === '1') {
            $theme = $userTS['setup.']['fields.']['theme'] ?? 'modern';
        }
        if ($theme !== 'modern') {
            $redirectParameters['install']['theme'] = $theme;
        }

        $colorSchemeDisabled = $userTS['setup.']['fields.']['colorScheme.']['disabled'] ?? '0';
        $colorScheme = $GLOBALS['BE_USER']->uc['colorScheme'] ?? $userTS['setup.']['fields.']['colorScheme'] ?? 'auto';
        if ($colorSchemeDisabled === '1') {
            $colorScheme = $userTS['setup.']['fields.']['colorScheme'] ?? 'light';
        }
        if ($colorScheme !== 'auto') {
            $redirectParameters['install']['colorScheme'] = $colorScheme;
        }

        $userSession = $this->getBackendUser()->getSession();
        $this->sessionService->installSessionHandler();
        $this->sessionService->startSession();
        $this->sessionService->setAuthorizedBackendSession($userSession);
        $entryPointResolver = GeneralUtility::makeInstance(BackendEntryPointResolver::class);
        $redirectLocation = $entryPointResolver->getUriFromRequest($request, 'install.php')->withQuery('?' . http_build_query($redirectParameters, '', '&', PHP_QUERY_RFC3986));
        return new RedirectResponse($redirectLocation, 303);
    }

    protected function getBackendUser(): BackendUserAuthentication
    {
        return $GLOBALS['BE_USER'];
    }
}