import java.lang.Math
    
    var boolean autoChangeInProgress = false
    
    rule "Filterlaufzeit"
    when
    	System started
    	or
    	Item Lueftung_Filterlaufzeit changed
    then
    	if( Lueftung_Filterlaufzeit.state instanceof DecimalType ){
    
    		var Number laufzeit = Lueftung_Filterlaufzeit.state as DecimalType
    
    		var Number weeks = Math::floor( (laufzeit/168).doubleValue )
    		var Number days = Math::floor( ((laufzeit-(weeks*168))/24).doubleValue)
    
    		var String msg = ""
    
    		if( weeks > 0 ){
    
    			if( weeks == 1 ) msg = weeks.intValue + " Woche"
    			else msg = weeks.intValue + " Wochen"
    		}
    
    		if( days > 0 ){
    
    			if( msg.length > 0 ) msg = msg + ", "
    
    			if( days == 1 ) msg = msg + days.intValue + " Tag"
    			else msg = msg + days.intValue + " Tage"
    		}
    
    		postUpdate(Lueftung_Filterlaufzeit_Message,msg)
    	}
    end
    
 
    rule "Predkosc wentylatora"
    when
        Item Lueftung_Auto_Mode changed
        or
        Time cron "0 0/1 * * * ?"
   
   then 
    		var Number day    = now.getDayOfWeek
    		var Number hour   = now.getHourOfDay
    		var Number minute = now.getMinuteOfHour
    
    		var boolean isNight = false
    
   			
    
           	if( day == 5 ){
    			if( hour < 7 || (hour >= 23 && minute >=30) ) isNight = true
    		}
    		
    		else if( day == 6 ){
    			if( hour < 9 || (hour >= 23 && minute >=30) ) isNight = true
    		}
    		
    		else if( day == 7 ){
    			if( hour < 9 || (hour >= 22 && minute >=30) || hour >= 23 ) isNight = true
    		}
    		else{
    
    			if( hour < 7 || (hour >= 22 && minute >=30) || hour >= 23 ) isNight = true
    		}
    
    		var Number currentLevel = (Lueftung_Fan_Level.state as DecimalType)
    		var Number newLevel = 2
    
    		if( !isNight ){
    
    			var Number raumTemperatur = (Lueftung_Ablufttemperatur.state as DecimalType)
    			var Number aussenTemperatur = (Lueftung_Aussenlufttemperatur.state as DecimalType)
    			var Number zielTemperatur = (Lueftung_Komfortemperatur.state as DecimalType)
    
    			if(
    				raumTemperatur >= zielTemperatur
    				&&
    				aussenTemperatur >= raumTemperatur
    			){
    
    				newLevel = 1
    			}
    			else if(
    				raumTemperatur >= zielTemperatur - 1
    				&&
    				aussenTemperatur >= raumTemperatur - 1
    				&&
    				currentLevel == 1
    			){
    
    				newLevel = 1
    			}
    		}
  
    
  
    			autoChangeInProgress=true
    			sendCommand(Lueftung_Fan_Level,newLevel)
    		
    		
    	
    end