<?php
require_once('./js/log4php/Logger.php');
require_once('./paths.php');
//require_once('./MYDB.php');
include_once('./MYDB.php');
//require_once('./controller.php');

class RefreshCharts{
	private $log;
	private $cache = null;
	public function __construct(){
		
		global $redis_host;
		global $redis_port;
		global $redis_scheme;
		global $host;

	$this->log = Logger::getLogger(__CLASS__);
      	Logger::configure('./js/log4php/log4php.xml');

              if(class_exists("Predis\Client")){
		
			try {
//todo changed timeout from 0 to -1 
			$this->cache = new Predis\Client(array("scheme" => $redis_scheme,"host" => $redis_host,"port" => $redis_port,"read_write_timeout" => -1));
				$this->log->info("redis host: ".$redis_host." and redis port: ".$redis_port);
			} catch(Exception $e) {
				$this->log->error("Error connecting to Redis server: ".$e->getMessage());
				$this->cache = null; 
			}
		}
    	else{
            $this->log->info("cache does not exist"); //predis
			exit;
    	}
	}


function refresh() {
		if($this->cache != null){ 
			$this->log->info("cache exists");			
			$database = new MYDB();
			$database->doConnect($GLOBALS['schema_file']);
			$keys = $this->cache->keys("*");

 $this->log->info(" ******************REFRESHING CACHE*************************");

//TODO REFRESH CHARTS AND DATA

for($x=0;$x<count($keys);$x++) {
   $this->log->info("Looking up for key: ".$keys[$x]);

if (strpos($keys[$x],'STATS')===false)
{
   try
{

$query = $this->cache->hget($keys[$x],'query');
$persistent= $this->cache->hget($keys[$x],'persistent');
//if($query!=null&&$persistent=='true')
if($query!=null)
{						$this->log->info("going to recalculate the results for query  ".$query );
						$fetchMode = $this->cache->hget($keys[$x], 'fetchMode');
						if($fetchMode==null)
                                                      { $fetchMode=3; }
                                                $shadowResults = $database->doQueryNoCache($query, $fetchMode);
                                                $result = $this->cache->hget($keys[$x], 'results');
				               // $this->log->info("Currently stored results".$result );
                                               $backup = $this->cache->hget($keys[$x], 'backup');
                                                //$this->log->info("Currently stored backup".$backup);
                                                
                                                 if(json_encode($shadowResults))
                                                 {$shadowResults=json_encode($shadowResults);}
	$this->cache->hmset($keys[$x],array("results" => $result, "query" =>$query,"persistent" => $persistent,"shadow" => $shadowResults, "fetchMode" => $fetchMode, "backup" => $backup));                       
$this->log->info("Stored Entry : ".$this->cache->hget($keys[$x],'shadow'));
					}
else{

$this->log->info("going to delete the key: ".$keys[$x]." for persistence : ".$persistent);
                     $this->cache->del($keys[$x]);
}

}//catch  
catch(Exception $e) {
$this->log->error('Error : '.$e->getMessage());

}			
	}


 else 
{ 
$this->log->info("Ignoring chart key: ".$keys[$x]);  
 }


  			}


// for eeach key loop

  			$database->doDisconnect();
			
		} else {
			$this->log->info("cache does not exist");
		}
	}
}
//$rc = new RefreshCharts();
//$rc->refresh();

?>