<?php

declare(strict_types=1);

/*
 * This file is part of the Inpsyde BackWpUp package.
 *
 * (c) Inpsyde GmbH
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 */

namespace Inpsyde\Restore\Api\Exception;

use Inpsyde\Restore\Api\Module\Registry;
use Inpsyde\Restore\Api\Module\Session\Session;
use Psr\Log\LoggerInterface;

/**
 * Class ExceptionHandler.
 *
 * @author  ap
 *
 * @since   1.0.0
 */
class ExceptionHandler
{
    /**
     * Holder var for Monolog logger instance.
     *
     * @var LoggerInterface
     */
    private $logger;

    /**
     * @var Session
     */
    private $session;

    /**
     * @var Registry
     */
    private $registry;

    /**
     * ExceptionHandler constructor.
     */
    public function __construct(
        LoggerInterface $logger,
        Session $session,
        Registry $registry
    ) {
        $this->logger = $logger;
        $this->session = $session;
        $this->registry = $registry;
    }

    /**
     * Register the exception handler as default.
     */
    public function register(): void
    {
        $callback = function (\Throwable $throwable): void {
            $this->handle_exception($throwable);
        };
        set_exception_handler($callback);
    }

    /**
     * Restore the default exception handler.
     */
    public function unregister(): void
    {
        restore_exception_handler();
    }

    public function handle_exception(\Throwable $exception): void
    {
        if (!$exception instanceof RestoreExceptionInterface) {
            return;
        }

        $this->registry->reset_registry();

        $msg = \get_class($exception)
            . ': '
            . $exception->getMessage()
            . ' ('
            . $exception->getFile()
            . ' on Line '
            . $exception->getLine()
            . ')';

        // Log the error.
        $this->logger->alert($msg);

        // Add a message for the user.
        $this->session->warning(
            __(
                'We encountered an error. Please check your log file for more information.',
                'backwpup'
            )
        );

        // Redirect to page and show error message.
        // phpcs:disable WordPress.VIP.SuperGlobalInputUsage.AccessDetected, WordPress.VIP.ValidatedSanitizedInput.InputNotValidated
        $url = (string) filter_var($_SERVER['HTTP_REFERER'] ?? '', FILTER_VALIDATE_URL);
        $url || (string) filter_var($_SERVER['ORIGIN'], FILTER_VALIDATE_URL);
        // phpcs:enable

        header('Location: ' . $url, true, 307);

        exit();
    }
}