stopsim()
{	
	echo "checking for pid file: $PIDFILE"
	if [ -f $PIDFILE ] 
	then
        	running=`ps aux | grep $NAME | grep $(cat $PIDFILE) -c`
	        if [ $running -eq 0 ]
	        then 
	        	echo Simulation not running	     
	        else 
	        	echo "Killing Simulation $(cat $PIDFILE)"      
			kill $(cat $PIDFILE)
			echo stoped Simulation
		fi
		rm $PIDFILE
	fi	
	true
}

stopsim_and_exit()
{
	if [ $DATA_DIRECTORY ] && [ -d $DATA_DIRECTORY ];
	then
		PIDFILE=$DATA_DIRECTORY/$NAME.pid
		stopsim
		echo "exiting now."
		exit 0
	fi
}

set_default_data_dir()
{
	i="0"
	while [ -d $DATA_DIR_BASE$i ]
	do
		i=$[$i+1]
	done
	DATA_DIRECTORY=$DATA_DIR_BASE$i
	echo "setting data directory to: $DATA_DIRECTORY"
}

create_datadirectory()
{
	if [ ! $DATA_DIRECTORY ]
	then
		set_default_data_dir
	fi

	if [ ! -d $DATA_DIRECTORY ]
	then
		echo "create data directory: $DATA_DIRECTORY"
		mkdir -p $DATA_DIRECTORY
	fi

	ERROR=$?
	if [ $ERROR -ne "0" ]
	then
		exit 1
	fi
}

USAGE="Usage: `basename $0` [-h] [-d data_dir] args_forwarded_to_simulation"
while [ ! $STOP ] 
do
        if [ $# -eq 0 ] || [[ "$1" =~ "--" ]]
        then
                STOP=true
        else
                echo "para=$1"
                case "$1" in 
                        "-d")
                                DATA_DIRECTORY=$2
				echo "directory = $2"
				shift
                                ;;
                        "-h")				
                                echo $USAGE
				exit 0
				;;
			"stop")
				STOP=true
				stopsim_and_exit
				;;
                esac
                shift
        fi

done


create_datadirectory

PIDFILE=$DATA_DIRECTORY/$NAME.pid
stopsim
        

SIM_PARAMETERS="--DataDirectory $DATA_DIRECTORY $*"
nohup nice -10 ./$NAME $SIM_PARAMETERS >$DATA_DIRECTORY/simoutput.txt 2>$DATA_DIRECTORY/simerror.txt &
echo $! > $PIDFILE
echo started simulation with parameters: $SIM_PARAMETERS