<?php

/**
 * SPDX-FileCopyrightText: 2017-2024 Nextcloud GmbH and Nextcloud contributors
 * SPDX-FileCopyrightText: 2016 ownCloud, Inc.
 * SPDX-License-Identifier: AGPL-3.0-only
 */
namespace OCA\FederatedFileSharing\BackgroundJob;

use OCA\FederatedFileSharing\Notifications;
use OCP\AppFramework\Utility\ITimeFactory;
use OCP\BackgroundJob\IJobList;
use OCP\BackgroundJob\Job;

/**
 * Class RetryJob
 *
 * Background job to re-send update of federated re-shares to the remote server in
 * case the server was not available on the first try
 *
 * @package OCA\FederatedFileSharing\BackgroundJob
 */
class RetryJob extends Job {
	private bool $retainJob = true;

	/** @var int max number of attempts to send the request */
	private int $maxTry = 20;

	/** @var int how much time should be between two tries (10 minutes) */
	private int $interval = 600;

	public function __construct(
		private Notifications $notifications,
		ITimeFactory $time,
	) {
		parent::__construct($time);
	}

	/**
	 * Run the job, then remove it from the jobList
	 */
	public function start(IJobList $jobList): void {
		if ($this->shouldRun($this->argument)) {
			parent::start($jobList);
			$jobList->remove($this, $this->argument);
			if ($this->retainJob) {
				$this->reAddJob($jobList, $this->argument);
			}
		}
	}

	protected function run($argument) {
		$remote = $argument['remote'];
		$remoteId = $argument['remoteId'];
		$token = $argument['token'];
		$action = $argument['action'];
		$data = json_decode($argument['data'], true);
		$try = (int)$argument['try'] + 1;

		$result = $this->notifications->sendUpdateToRemote($remote, $remoteId, $token, $action, $data, $try);

		if ($result === true || $try > $this->maxTry) {
			$this->retainJob = false;
		}
	}

	/**
	 * Re-add background job with new arguments
	 */
	protected function reAddJob(IJobList $jobList, array $argument): void {
		$jobList->add(RetryJob::class,
			[
				'remote' => $argument['remote'],
				'remoteId' => $argument['remoteId'],
				'token' => $argument['token'],
				'data' => $argument['data'],
				'action' => $argument['action'],
				'try' => (int)$argument['try'] + 1,
				'lastRun' => $this->time->getTime()
			]
		);
	}

	/**
	 * Test if it is time for the next run
	 */
	protected function shouldRun(array $argument): bool {
		$lastRun = (int)$argument['lastRun'];
		return (($this->time->getTime() - $lastRun) > $this->interval);
	}
}