<?php
/**
 * webtrees: online genealogy
 * Copyright (C) 2018 webtrees development team
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 * GNU General Public License for more details.
 * You should have received a copy of the GNU General Public License
 * along with this program. If not, see <http://www.gnu.org/licenses/>.
 */
declare(strict_types=1);

namespace Fisharebest\Webtrees\Http\Controllers;

use Fisharebest\Webtrees\Auth;
use Fisharebest\Webtrees\Html;
use Fisharebest\Webtrees\Log;
use Fisharebest\Webtrees\Tree;
use HttpException;
use Symfony\Component\HttpFoundation\RedirectResponse;
use Symfony\Component\HttpFoundation\Request;
use Symfony\Component\HttpFoundation\Response;
use Throwable;
use Whoops\Handler\PlainTextHandler;
use Whoops\Run;

/**
 * Controller for error handling.
 */
class ErrorController extends BaseController {
	/**
	 * No route was match?  Send the user somewhere sensible, if we can.
	 *
	 * @param Request $request
	 *
	 * @return Response
	 */
	public function noRouteFound(Request $request): Response {
		$tree = $request->attributes->get('tree');

		// The tree exists, we have access to it, and it is fully imported.
		if ($tree instanceof Tree && $tree->getPreference('imported') === '1') {
			return new RedirectResponse(route('tree-page', ['ged' => $tree->getName()]));
		}

		// Not logged in?
		if (!Auth::check()) {
			return new RedirectResponse(Html::url('login.php', ['url' => $request->getRequestUri()]));
		}

		// No tree or tree not imported?
		if (Auth::isAdmin()) {
			return new RedirectResponse(Html::url('admin_trees_manage.php', []));
		}

		return $this->viewResponse('errors/no-tree-access', []);
	}

	/**
	 * Convert an exception into an error message
	 *
	 * @param string $error
	 *
	 * @return Response
	 */
	public function errorResponse(string $error): Response {
		return $this->viewResponse('alerts/danger', [
			'title' => 'Error',
			'alert' => $error,
			], Response::HTTP_INTERNAL_SERVER_ERROR);
	}

	/**
	 * Convert an exception into an error message
	 *
	 * @param Request   $request
	 * @param Throwable $ex
	 *
	 * @return Response
	 */
	public function unhandledExceptionResponse(Request $request, Throwable $ex): Response {
		// Create a stack dump for the exception
		$whoops = new Run;
		$whoops->allowQuit(false);
		$whoops->writeToOutput(false);
		$whoops->pushHandler(new PlainTextHandler);
		$error = $whoops->handleException($ex);

		// We do not need to show the full path.
		$error = str_replace(' ' . WT_ROOT, ' /', $error);

		try {
			Log::addErrorLog($error);
		} catch (Throwable $ex2) {
			// Must have been a problem with the database.  Nothing we can do here.
		}

		if ($request->isXmlHttpRequest()) {
			return new Response(view('alerts/danger', ['alert' => $error]), Response::HTTP_INTERNAL_SERVER_ERROR);
		}

		try {
			return $this->viewResponse('errors/unhandled-exception', [
				'title' => 'Error',
				'error' => $error,
			], Response::HTTP_INTERNAL_SERVER_ERROR);
		} catch (Throwable $ex2) {
			// An error occured in the layout?  Just show the error.
			return new Response($error, Response::HTTP_INTERNAL_SERVER_ERROR);
		}
	}
}
