<?php
/**
 * VersionCheckEventHandler.php
 * Copyright (c) 2017 thegrumpydictator@gmail.com
 *
 * This file is part of Firefly III.
 *
 * Firefly III 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.
 *
 * Firefly III 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 Firefly III. If not, see <http://www.gnu.org/licenses/>.
 */
/** @noinspection MultipleReturnStatementsInspection */
/** @noinspection NullPointerExceptionInspection */
declare(strict_types=1);

namespace FireflyIII\Handlers\Events;


use FireflyConfig;
use FireflyIII\Events\RequestedVersionCheckStatus;
use FireflyIII\Helpers\Update\UpdateTrait;
use FireflyIII\Models\Configuration;
use FireflyIII\Repositories\User\UserRepositoryInterface;
use FireflyIII\User;
use Log;


/**
 * Class VersionCheckEventHandler
 */
class VersionCheckEventHandler
{
    use UpdateTrait;

    /**
     * Checks with GitHub to see if there is a new version.
     *
     * @SuppressWarnings(PHPMD.CyclomaticComplexity)
     * @SuppressWarnings(PHPMD.NPathComplexity)
     * @SuppressWarnings(PHPMD.ExcessiveMethodLength)
     * @param RequestedVersionCheckStatus $event
     */
    public function checkForUpdates(RequestedVersionCheckStatus $event): void
    {
        Log::debug('Now in checkForUpdates()');
        // in Sandstorm, cannot check for updates:
        $sandstorm = 1 === (int)getenv('SANDSTORM');
        if (true === $sandstorm) {
            Log::debug('This is Sandstorm instance, done.');

            return;
        }

        /** @var UserRepositoryInterface $repository */
        $repository = app(UserRepositoryInterface::class);
        /** @var User $user */
        $user = $event->user;
        if (!$repository->hasRole($user, 'owner')) {
            Log::debug('User is not admin, done.');

            return;
        }

        /** @var Configuration $lastCheckTime */
        $lastCheckTime = FireflyConfig::get('last_update_check', time());
        $now           = time();
        $diff          = $now - $lastCheckTime->data;
        Log::debug(sprintf('Last check time is %d, current time is %d, difference is %d', $lastCheckTime->data, $now, $diff));
        if ($diff < 604800) {
            Log::debug(sprintf('Checked for updates less than a week ago (on %s).', date('Y-m-d H:i:s', $lastCheckTime->data)));

            return;
        }
        // last check time was more than a week ago.
        Log::debug('Have not checked for a new version in a week!');

        $latestRelease = $this->getLatestRelease();
        $versionCheck  = $this->versionCheck($latestRelease);
        $resultString  = $this->parseResult($versionCheck, $latestRelease);
        if (0 !== $versionCheck && '' !== $resultString) {
            // flash info
            session()->flash('info', $resultString);
        }
        FireflyConfig::set('last_update_check', time());
    }
}