<?php
/**
 * @version     admin/classes/auditprocess.php 2024-03-27 zanardigit
 * @package     Watchful Client
 * @author      Watchful
 * @authorUrl   https://watchful.net
 * @copyright   Copyright (c) 2012-2025 Watchful
 * @license     GNU/GPL v3 or later
 */

defined('_JEXEC') or die;
defined('WATCHFULLI_PATH') or die;

abstract class WatchfulliAuditProcess
{
	// do not allow connections to surpass this limit
	// see https://support.cloudflare.com/hc/en-us/articles/200171926-Error-524-A-timeout-occurred
	// CloudFlare will only allow a max of 100 seconds
	const _DEFAULT_TIMEEXECUTION_LIMIT = 90;

	private $max_execution_time;
	private $start_time;
	protected $step_time = 1;
	protected $cache;
	private $db;

	/**
	 * @throws Exception
	 */
    public function __construct()
    {
        $this->start_time = $this->microtimeFloat();
        $this->cache = WatchfulliFactory::getCacheController();
        $this->cache->cache->setCaching(1);
        $this->cache->cache->setLifeTime(3600);
        $this->cache->cache->setLifeTime(3600);
        $this->db = WatchfulliFactory::getDbo();
        $this->max_execution_time = $this->calculateMaxExecutionTime();
    }

	/**
	 * Get the maximum execution time from the system
	 *
	 * @return int
	 * @throws Exception
	 */
	private function calculateMaxExecutionTime(): int
    {
		$max_executiontime_set_by_master = WatchfulliFactory::getInput()->get('max_execution_time', 0);
		if ($max_executiontime_set_by_master)
		{
			return min(self::_DEFAULT_TIMEEXECUTION_LIMIT, $max_executiontime_set_by_master);
		}

		$php_execution_time = (int) ini_get("max_execution_time");

		if (!$php_execution_time)
		{
			return self::_DEFAULT_TIMEEXECUTION_LIMIT;
		}

		if ($php_execution_time > self::_DEFAULT_TIMEEXECUTION_LIMIT)
		{
			return self::_DEFAULT_TIMEEXECUTION_LIMIT;
		}

		return $php_execution_time - 2; //extra security;
	}

	public function getMaxExecutionTime(): int
    {
		return $this->max_execution_time;
	}

	/**
	 * Calculate if we have X second(s) left
	 */
	public function haveTime(): bool
    {
		$availableTime = $this->max_execution_time - $this->haveRun();

		return $availableTime > $this->step_time;
	}

	/**
	 * Nomber of second from the start of the script
	 */
	private function haveRun(): float
    {
		return $this->microtimeFloat() - $this->start_time;
	}

	/**
	 * Simple function to replicate PHP 5 behaviour
	 */
	private function microtimeFloat(): float
    {
		list ($usec, $sec) = explode(" ", microtime());

		return ((float) $usec + (float) $sec);
	}

}