<?php

namespace BackupGuard\Security;

require_once(BGS_SCAN_PATH.'Scanner.php');
require_once(BGS_LIB_PATH.'ReloaderState.php');
require_once(BGS_LIB_PATH.'ReloadHandler.php');
require_once(BGS_LIB_PATH.'Callback.php');

class Reloader
{
	public static function awake($method = null)
	{
		$reloaderState = ReloaderState::loadState();
		if ($reloaderState['callback'] != "" && $reloaderState['state'] == BGS_RELOADER_STATUS_IDLE) {

			$callbackJson = json_decode($reloaderState['callback']);
			$callbackJson->params = array();
			$callback = new Callback($callbackJson->class, $callbackJson->method, $callbackJson->params);

			if ($callback->canPerform()) {
				self::saveState('', BGS_RELOADER_STATUS_RUNNING);
				$callback->perform();
			}
		}

		return;
	}

	private static function saveState($callback, $state = BGS_RELOADER_STATUS_IDLE)
	{
		$sgReloaderState = new ReloaderState();
		$sgReloaderState->setCallback($callback);
		$sgReloaderState->setState($state);
		$sgReloaderState->update();
	}

	public static function didCompleteCallback()
	{
		self::saveState('', BGS_RELOADER_STATUS_IDLE);
	}

	public static function registerCallback(Callback $callback)
	{
		self::saveState($callback->toString());
	}

	public static function reset()
	{
		ReloaderState::reset();
	}

	public static function reloadWithAjaxUrl($awakeURL)
	{
		// awake frequency in miliseconds
		$ajaxRequestFrequency = Config::get('BGS_AJAX_REQUEST_FREQUENCY');
		$sgAwakeFrequency = $ajaxRequestFrequency?$ajaxRequestFrequency:BGS_AJAX_DEFAULT_REQUEST_FREQUENCY;
		$sgAwakeFrequency = $sgAwakeFrequency / 1000; // awake frequency in seconds

		// add 3 seconds to awake frequency
		$timeout = $sgAwakeFrequency + 3;
		while ($timeout) {

			$reloaderState = ReloaderState::loadState();
			$state = $reloaderState['state'];

			if ($state == BGS_RELOADER_STATUS_RUNNING) {
				return;
			}

			sleep(1);
			$timeout--;
		}

		self::reload($awakeURL);
	}

	private static function reload($awakeURL)
	{
		$sgReloadHandler = new ReloadHandler($awakeURL);
		$sgReloadHandler->reload();
		return;
	}
}