#!/bin/sh

DAEMON=fhem
DAEMON_LONG_NAME="FHEM - Home automation"
FHEM_HOME=/usr/lib/fhem
FHEM_DATA=/mod/etc/fhem
FHEM_LOG=/var/log/fhem
PID_FILE=/var/run/fhem.pid
ARGS=

. /etc/init.d/modlibrc

[ -r /etc/options.cfg ] && . /etc/options.cfg


export PATH=/usr/local/bin:$PATH

cleanup() {
	rm -rf /mod/etc/$DAEMON
	rm -rf /var/run/$DAEMON
}

config() {
	[ -d "/tmp/flash/$DAEMON" ]  || mkdir -p /tmp/flash/$DAEMON
	if [ ! -e /tmp/flash/${DAEMON}/fhem.cfg ]; then
		echo -n "Creating $DAEMON configuration ... "
		cat /mod/etc/default.${DAEMON}/fhem.cfg.default > /tmp/flash/${DAEMON}/fhem.cfg
	fi
	
	modlib_add_user_and_group fhem
	
}	

prepare_fhemdata_directory() {
	if [ -h ${FHEM_DATA} ]; then
	  rm ${FHEM_DATA}
	elif [ -e ${FHEM_DATA} ]; then
	  find ${FHEM_DATA} -type l -exec rm {} \;
	  rm -rf ${FHEM_DATA}/demolog
	  diff /mod/etc/default.${DAEMON}/configDB.db ${FHEM_DATA}/configDB.db && rm ${FHEM_DATA}/configDB.db || echo "Warning[$DAEMON]: configDB has changed, may not correctly initialize fhem directory"
	  rmdir ${FHEM_DATA}
	fi

	if [ -z "${FHEM_LOCATION}" ]; then
		echo "Info[$DAEMON]: internal storage is used" 1>&2
	elif [ ! -e ${FHEM_LOCATION} ]; then
		mkdir -p ${FHEM_LOCATION}
	else
	  ln -s ${FHEM_LOCATION} ${FHEM_DATA}
	fi
	[ -d ${FHEM_DATA}          ] || mkdir -p ${FHEM_DATA}

	if [ -z "${FHEM_LOCATION}" ]; then
	  [ -e ${FHEM_DATA}/fhem.cfg      ] || ln -s /tmp/flash/${DAEMON}/fhem.cfg ${FHEM_DATA}/fhem.cfg
	elif [ ! -e "${FHEM_LOCATION}/fhem.cfg" ]; then
	  echo -n "Creating $DAEMON configuration in ${FHEM_LOCATION} ... "
	  cat /mod/etc/default.${DAEMON}/fhem.cfg.default > ${FHEM_LOCATION}/fhem.cfg
	  [ -e ${FHEM_DATA}/fhem.cfg           ] || ln -s ${FHEM_LOCATION}/fhem.cfg ${FHEM_DATA}/fhem.cfg
	  [ -e ${FHEM_LOCATION}/FHEM/FhemUtils ] || mkdir -p ${FHEM_LOCATION}/FHEM/FhemUtils
	  [ -e ${FHEM_DATA}/FHEM               ] || mkdir -p ${FHEM_DATA}/FHEM
	  [ -e ${FHEM_DATA}/FHEM/FhemUtils     ] || ln -s ${FHEM_LOCATION}/FHEM/FhemUtils ${FHEM_DATA}/FHEM/FhemUtils
	else
	  [ -e ${FHEM_DATA}/fhem.cfg           ] || ln -s ${FHEM_LOCATION}/fhem.cfg ${FHEM_DATA}/fhem.cfg
	  [ -e ${FHEM_LOCATION}/FHEM/FhemUtils ] || mkdir -p ${FHEM_LOCATION}/FHEM/FhemUtils
	  [ -e ${FHEM_DATA}/FHEM               ] || mkdir -p ${FHEM_DATA}/FHEM
	  [ -e ${FHEM_DATA}/FHEM/FhemUtils     ] || ln -s ${FHEM_LOCATION}/FHEM/FhemUtils ${FHEM_DATA}/FHEM/FhemUtils
	fi
	[ -d $(dirname $PID_FILE)       ] || mkdir -p $(dirname $PID_FILE)
	if [ -n "${FHEM_LOGEXTERN}" ]; then
	  [ -d ${FHEM_LOGEXTERN}        ] || mkdir -p ${FHEM_LOGEXTERN}
	  [ -d ${FHEM_DATA}/log         ] || (cd ${FHEM_DATA}; ln -s ${FHEM_LOGEXTERN} log)
	elif [ -n "${FHEM_LOCATION}" ]; then
	  [ -d ${FHEM_LOCATION}/log     ] || mkdir -p ${FHEM_LOCATION}/log
	  [ -d ${FHEM_DATA}/log         ] || (cd ${FHEM_DATA}; ln -s ${FHEM_LOCATION}/log log)
	else
	  [ -d ${FHEM_LOG}              ] || mkdir -p ${FHEM_LOG}
	  [ -d ${FHEM_DATA}/log         ] || (cd ${FHEM_DATA}; ln -s ${FHEM_LOG} log)
	fi
	[ -d ${FHEM_DATA}/demolog       ] || (mkdir -p ${FHEM_DATA}/demolog; )
	[ -e ${FHEM_DATA}/configDB.db   ] || cp /mod/etc/default.${DAEMON}/configDB.db ${FHEM_DATA}/.
	[ -e ${FHEM_DATA}/configDB.conf ] || ln -s /mod/etc/default.${DAEMON}/configDB.conf ${FHEM_DATA}/configDB.conf
	for i in $(ls ${FHEM_HOME}); do
		[ -e ${FHEM_DATA}/$i ] || ln -s ${FHEM_HOME}/$i ${FHEM_DATA}/$i
	done
	for i in $(ls ${FHEM_HOME}/FHEM); do
		[ -e ${FHEM_DATA}/FHEM/$i ] || ln -s ${FHEM_HOME}/FHEM/$i ${FHEM_DATA}/FHEM/$i
	done
	for i in $(ls ${FHEM_HOME}/FHEM/FhemUtils); do
		[ -e ${FHEM_DATA}/FHEM/FhemUtils/$i ] || ln -s ${FHEM_HOME}/FHEM/FhemUtils/$i ${FHEM_DATA}/FHEM/FhemUtils/$i
	done

	changeownership_fhem
}

changeownership_fhem() {
	chown fhem:users ${FHEM_DATA}
	chown fhem:users ${FHEM_DATA}/configDB.db
	chown -R fhem:users ${FHEM_DATA}/log/.
	chown -R fhem:users ${FHEM_DATA}/demolog
	chown -R fhem:users ${FHEM_DATA}/FHEM/FhemUtils
	chmod g+w ${FHEM_DATA}/fhem.cfg
	chmod g+w ${FHEM_DATA}/FHEM/FhemUtils/.
	chmod g+w ${FHEM_DATA}/FHEM/FhemUtils/uniqueID 2> /dev/null
	chown fhem:root ${FHEM_DATA}/fhem.cfg
}

start() {
	trap "rm -f /var/run/rc.$DAEMON.pid; exit 255" 0 1 2 3 15
	echo -n "Starting ${DAEMON_LONG_NAME} ... "

	[ -r /etc/options.cfg ] && . /etc/options.cfg
	
	prepare_fhemdata_directory

	local startup_cfg;
        local mode;
	if [ "${FHEM_DEMOMODE}" = 'yes' ]; then
	  startup_cfg=fhem.cfg.demo
	  mode=demo
	elif [ "${FHEM_DBMODE}" = 'yes' ]; then
	  startup_cfg=configDB.pm
	  mode=configDB
	else
	  startup_cfg=fhem.cfg
	  mode=normal
	fi

	
	echo -n "mode=$mode ... "
	local PWD=`pwd`
	export PERL5LIB=/mod/external/usr/lib/fhem/FHEM:/usr/lib/fhem/FHEM 
	cd $FHEM_DATA; start-stop-daemon -S -b -m -p $PID_FILE -x perl fhem.pl $startup_cfg -N15 -- $ARGS 1>&2 | logger -t $DAEMON
	exitval=$?
	cd $PWD; sleep 10

	echo `ps | grep fhem | grep -v grep | grep -v rc | awk '{ printf $1 }'` > $PID_FILE
	if [ -s $PID_FILE ] && kill -0 $(cat $PID_FILE) 2> /dev/null; then
		echo 'done.'
	else
		echo 'failed.'
		exit $exitval
	fi
}


trap "rm -f /var/run/rc.$DAEMON.pid; exit 255" 1 2 3 15
case $1 in
	""|load)
		config
		
		if [ "${FHEM_DBMODE}" != 'yes' -a "${FHEM_DEMOMODE}" != 'yes' ]; then
		  modreg file $DAEMON cfg "fhem.cfg" 1 "fhem_cfg"
		fi
		modreg cgi $DAEMON FHEM
		modreg daemon $DAEMON

		modlib_start $FHEM_ENABLED
		;;
	unload)
		modunreg file $DAEMON
		modunreg daemon $DAEMON
		modunreg cgi $DAEMON
		
		[ -s /var/run/rc.$DAEMON.pid ] && PID_FILE=/var/run/rc.$DAEMON.pid
		modlib_stop 
		cleanup
		;;
	config)
		config
		;;
	start)
		if [ -s /var/run/rc.$DAEMON.pid ]; then
			kill -0 $(cat /var/run/rc.$DAEMON.pid)
			if [ $? -eq 0 ]; then
				echo "Startup of $DAEMON already performed." 1>&2
				exit 0
			fi
			rm -f /var/run/rc.$DAEMON.pid
		fi
		start
		;;
	stop)
		[ -s /var/run/rc.$DAEMON.pid ] && PID_FILE=/var/run/rc.$DAEMON.pid
		modlib_stop
		;;
	restart)
		modunreg file $DAEMON
		modlib_restart
		if [ "${FHEM_DBMODE}" != 'yes' -a "${FHEM_DEMOMODE}" != 'yes' ]; then
		  modreg file $DAEMON cfg 'fhem.cfg' 1 "fhem_cfg"
		fi
		;;
	reload)
		modlib_reload
		;;
	status)
		[ -e $PID_FILE ] || echo `ps | grep fhem | grep -v grep | grep -v rc | awk '{ printf $1 }'` > $PID_FILE
		[ ! -s $PID_FILE ] && rm $PID_FILE
		modlib_status
		;;
	*)
		echo "Usage: $0 [load|unload|config|start|stop|restart|reload|status]" 1>&2
		exit 1
		;;
esac

exit 0