function showhelp {
  			   echo -e "\nusage:  clean-app-state -a <app-name> [-g <ghn_home>] [-h] \n" 
               echo    "  a                  = the application name whose state has to be cleaned"
			   echo    "  g                  = the gHN directory."
		       echo -e "  h                  = shows this help.\n"
}

while getopts ":a:g:xh" opt; do
  case $opt in
	g) ghnhome=$OPTARG;;
	a) apps=$OPTARG;;
    h) showhelp
exit 0 ;;
	:)  echo -e "\nERROR:option -$OPTARG requires an argument." >&2 ; 
				showhelp; 
				echo -e "\naborting.\n"
				exit 1;;
	\?) echo -e "\nERROR:invalid option: -$OPTARG"; 
			showhelp; 
			echo -e "\naborting.\n" 
			exit 1 >&2 ;;
  esac
done


if [ -z "$apps" ]; then
	echo -e "\nERROR: apps parameter do not specified. please specify it with -a option" >&2
	exit 1;
fi

if [ -z "$ghnhome" ]; then 
	if [ -z "$GHN_HOME" ]; then 
		echo -e "\nERROR:please specify the gHN directory (-g) or define the GHN_HOME env var." >&2
		showhelp
		echo -e "\naborting.\n"
		exit 1
	else
		ghnhome=$GHN_HOME
	fi
fi


if [ ! -d "$ghnhome/state/$apps" ]; then
	echo -e "\nERROR: apps folder does not exist or is not a directory, aborting." >&2
	exit 1;
fi

echo "Removing application state $ghnhome/state/$apps"
#removing folder
rm -rf $ghnhome/state/$apps