#!/bin/sh
APP=argeo

if [ -z "$2" ]; then
# Default node
CONF_DIR=/etc/$APP
EXEC_DIR=/var/lib/$APP
else
# Instance
INSTANCE=$2
	if [ -z "$STATE_DIRECTORY" ]; then
	INSTANCE_DIR=$HOME/.local/share/$APP.d/$INSTANCE
	else
	# systemd StateDirectory=
	INSTANCE_DIR=$STATE_DIRECTORY
	fi
	if [ -z "$CONFIGURATION_DIRECTORY" ]; then
	CONF_DIR=$HOME/.config/$APP.d/$INSTANCE
	else
	# systemd ConfigurationDirectory=
	CONF_DIR=$CONFIGURATION_DIRECTORY
	fi
	
EXEC_DIR=$INSTANCE_DIR

	if [ ! -f $CONF_DIR/$APP.ini ]; then
	cp /etc/$APP/$APP.ini $CONF_DIR
	fi
	if [ ! -f $CONF_DIR/log4j.properties ]; then
	cp /etc/$APP/log4j.properties $CONF_DIR
	fi
fi

JVM=java

# Directories and files

BASE_POLICY_ALL=/usr/share/$APP/all.policy
BASE_CONFIG_INI=/usr/share/$APP/config.ini

CONF_DIRS=$CONF_DIR/conf.d
DATA_DIR=$EXEC_DIR/data
CONF_RW=$EXEC_DIR/state
CONFIG_INI=$CONF_RW/config.ini

# A2 sources can be overridden in *.ini files
A2_SOURCES=a2:///
OSGI_INSTALL_AREA=/usr/share/osgi/boot
OSGI_FRAMEWORK=$OSGI_INSTALL_AREA/org.eclipse.osgi.jar

# Overwrite variables
if [ -f $CONF_DIR/settings.sh ];then
	. $CONF_DIR/settings.sh
fi

RETVAL=0

start() {
	mkdir -p $CONF_RW
	mkdir -p $DATA_DIR

    # Merge config files
    printf "## Equinox configuration - Generated by /usr/sbin/nodectl ##\n\n" > $CONFIG_INI
    cat $BASE_CONFIG_INI >> $CONFIG_INI
    printf "\n##\n## $CONF_DIR/$APP.ini\n##\n\n" >> $CONFIG_INI
    cat $CONF_DIR/$APP.ini >> $CONFIG_INI
    for file in `ls -v $CONF_DIRS/*.ini`; do
            printf "\n##\n## $file\n##\n\n" >> $CONFIG_INI
            cat $file >> $CONFIG_INI
    done;

	cd $EXEC_DIR
	$JVM \
		-Dlog4j.configuration="file:$CONF_DIR/log4j.properties" \
		$JAVA_OPTS -jar $OSGI_FRAMEWORK \
		-Dargeo.osgi.sources=$A2_SOURCES \
		-configuration "$CONF_RW" \
		-data "$DATA_DIR"
}

reload() {
	echo Not yet implemented
}

stop() {
	if [ -f $PID_FILE ];then
		PID=`cat $PID_FILE`
		kill -0 $PID &> /dev/null
		PID_EXISTS=$?
		if [ $PID_EXISTS -ne 0 ]; then
			echo Dead $APP process with pid $PID, removing $PID_FILE
			rm -f $PID_FILE
			RETVAL=1
			return $RETVAL
		fi
	else
		echo $APP is not running
		RETVAL=1
		return $RETVAL
	fi
	
	# notifies application by removing the shutdown file
#	rm -f $SHUTDOWN_FILE
	kill $PID
	
	# wait 10 min for application to shutdown, then kill it
	TIMEOUT=$((10*60))
	BEGIN=$(date +%s)
	while kill -0 $PID &> /dev/null
	do
		sleep 1
		NOW=$(date +%s)
		DURATION=$(($NOW-$BEGIN))
		if [ $DURATION -gt $TIMEOUT ]; then
			kill -9 $PID
			echo Forcibly killed $APP with pid $PID
			RETVAL=1
		fi
	done
	
	# remove pid file
	rm -f $PID_FILE
	return $RETVAL
}

status() {
	if [ -f $PID_FILE ];then
		PID=`cat $PID_FILE`
	else
		echo $APP is not running
		return $RETVAL
	fi
	kill -0 $PID &> /dev/null
	PID_EXISTS=$?
	if [ $PID_EXISTS -eq 0 ]; then
		echo $APP is running with pid $PID ...
	else
		echo No $APP process with pid $PID, removing $PID_FILE
		rm -f $PID_FILE
	fi
	return $RETVAL
}

# main
case "$1" in
  start)
        start
        ;;
  reload)
        reload
        ;;
  stop)
        stop
        ;;
  status)
	status
        ;;
  *)
        echo $"Usage: $0 {start|stop|status}"
        exit 1
esac