#!/bin/sh

DAEMON=rrdstats
. /etc/init.d/modlibrc

HTTPD_PID_RRD=/var/run/webcfg-rrd.pid
HTTPD_PID_ONE=/var/run/webcfg-one.pid

config() {
	for SUBDAEMON in rrd one; do
		modlib_config httpd-$SUBDAEMON /mod/etc/httpd-${SUBDAEMON}.conf
	done

	mkdir -p /tmp/rrdstats/
	rm -f /tmp/rrdstats/digitemp_alert*
	# kein "-p" wg externer Pfade!
	mkdir $RRDSTATS_RRDDATA 2>/dev/null
	mkdir $RRDSTATS_RRDTEMP 2>/dev/null
	rm /var/mod/etc/statpix 2>/dev/null
	ln -s $(echo "$RRDSTATS_RRDTEMP" | sed 's/\/*$//g') /var/mod/etc/statpix 2>/dev/null

	# show/hide digitemp
	modunreg status rrdstats rrddt
	modunreg file rrdstats
	if [ -x "$(which digitemp)" -a "$RRDSTATS_DIGITEMP1W" = yes ]; then
		modreg status rrdstats DigiTemp rrddt
		modreg file rrdstats dt-conf 'dt-conf' 0 "dt-conf"
		modreg file rrdstats dt-alias 'dt-alias' 1 "dt-alias"
		modreg file rrdstats dt-group 'dt-group' 1 "dt-group"
		modreg file rrdstats dt-alert 'dt-alert' 1 "dt-alert"
	fi
}

start() {
	[ "$RRDSTATS_SAVEBACKUP" = yes -a "$RRDSTATS_END_BACKUP" = no ] && backup
	[ "$RRDSTATS_START_RESTORE" = yes ] && restore silent

	stop_status

	modlib_startdaemon start-stop-daemon -S -b -q -m -p $PID_FILE -n $DAEMON -a /etc/default.rrdstats/rrdstats -- $RRDSTATS_INTERVAL

	if [ "$RRDSTATS_WEBENABLED" = "yes" -a "$RRDSTATS_WEB_INETD" != "yes" ]; then
		webcfg-rrd -P "$HTTPD_PID_RRD"
	fi
	if [ -x "$(which digitemp)" -a "$RRDSTATS_DIGITEMP_HTTP" = "yes" -a "$RRDSTATS_DIGITEMP_INETD" != "yes" ]; then
		webcfg-one -P "$HTTPD_PID_ONE"
	fi
	[ -x /etc/init.d/rc.inetd ] && /etc/init.d/rc.inetd config rrdstats
	modreg status rrdstats RRDstats stats
}

stop_pre() {
	stop_status
}

stop_post() {
	[ "$1" == 0 -a "$RRDSTATS_SAVEBACKUP" = yes -a "$RRDSTATS_END_BACKUP" = yes ] && backup silent
}

stop_status() {
	kill -9 "$(cat $HTTPD_PID_RRD 2>/dev/null)" 2>/dev/null
	kill -9 "$(cat $HTTPD_PID_ONE 2>/dev/null)" 2>/dev/null
	[ -x /etc/init.d/rc.inetd ] && /etc/init.d/rc.inetd config rrdstats >/dev/null
	modunreg status rrdstats rrddt
	modunreg status rrdstats stats
}

backup() {
	_TIMESTRING=$(echo $(date -Iseconds | sed 's/\:/-/g;s/\+.*//g;s/T/_/g'))
	_BACKUPNAME=$RRDSTATS_RRDBACKUP/$_TIMESTRING
	if [ $(ls $RRDSTATS_RRDDATA/*.rrd 2>/dev/null | wc -w) -le 0 ]; then
		[ "$1" != "silent" ] && echo "RRDstats "
		echo -n 'backup skipped, no files found ... '
		[ "$1" != "silent" ] && echo
		return
	fi
	mkdir $RRDSTATS_RRDBACKUP 2>/dev/null
	mkdir $_BACKUPNAME 2>/dev/null
	cp -pP $RRDSTATS_RRDDATA/*.rrd $_BACKUPNAME/ 2>/dev/null
	exitval=$?
	if [ $exitval -ne 0 ]; then
		if [ "$1" != "silent" ]; then
			echo "Starting RRDstats ... failed, not able to backup files."
		else
			echo 'backup failed, abort.'
		fi
		exit $exitval
	fi
	_BACKUPLOG=$RRDSTATS_RRDBACKUP/backup.log
	echo $_TIMESTRING >> $_BACKUPLOG
	if [ "$RRDSTATS_DELBACKUP" = yes ]; then
		countbackup=$(cat $_BACKUPLOG | wc -l)
		countdelete=$(($countbackup-$RRDSTATS_MAXIMUMBACKUPS))
		if [ $countdelete -gt 0 ]; then
			for delname in $(head $_BACKUPLOG -n $countdelete); do
				rm -rf $RRDSTATS_RRDBACKUP/$delname
			done
			tail $_BACKUPLOG -n $(($countbackup-$countdelete)) > $_BACKUPLOG.temp
			mv $_BACKUPLOG.temp $_BACKUPLOG
		fi
	fi
}

restore() {
	if kill -0 $(cat $PID_FILE 2>/dev/null) 2>/dev/null; then
		restart_rrdstats=yes
		modlib_stop
	fi

	[ "$1" != "silent" ] && echo -n 'RRDstats is restoring files ... '
	if [ $(ls $RRDSTATS_RRDBACKUP/* 2>/dev/null | wc -w) -le 0 ]; then
		if [ "$1" != "silent" ]; then
			echo 'skipped, no files found.'
		else
			echo 'Starting RRDstats ... failed, no files to restore.'
		fi
		exit 1
	fi

	[ ! -d "$RRDSTATS_RRDDATA" ] && mkdir -p $RRDSTATS_RRDDATA 2>/dev/null
	cp -pP $RRDSTATS_RRDBACKUP/$(echo $(tail -n1 $RRDSTATS_RRDBACKUP/backup.log))/*.rrd $RRDSTATS_RRDDATA/ 2>/dev/null
	exitval=$?
	if [ $exitval -ne 0 ]; then
		if [ "$1" != "silent" ]; then
			echo 'failed.'
		else
			echo "Starting RRDstats ... failed, not able to restore files."
		fi
		exit $exitval
	else
		[ "$1" != "silent" ] && echo 'done.'
	fi

	[ "$restart_rrdstats" = yes ] && modlib_start
}

case $1 in
	config)
		config
		;;
	""|load)
		modlib_add_httpd_symlink rrd one
		modreg cgi rrdstats RRDstats
		modreg extra rrdstats "" 2 dt-init
		modreg daemon $DAEMON
		modlib_start $RRDSTATS_ENABLED
		;;
	unload)
		modunreg daemon $DAEMON
		modunreg cgi rrdstats
		modunreg file rrdstats
		modunreg extra rrdstats
		modlib_stop
		;;
	start)
		modlib_start
		;;
	stop)
		modlib_stop
		;;
	restart)
		modlib_restart
		;;
	status)
		modlib_status
		;;
	status_webcfg-one)
		[ -x "$(which digitemp)" -a "$RRDSTATS_DIGITEMP_HTTP" = "yes" -a "$RRDSTATS_DIGITEMP_INETD" = "yes" -a "$(modlib_status)" == "running" ] && echo 'inetd' || modlib_status
		;;
	status_webcfg-rrd)
		[ "$RRDSTATS_WEBENABLED" = "yes" -a "$RRDSTATS_WEB_INETD" = "yes" -a "$(modlib_status)" == "running" ] && echo 'inetd' || modlib_status
		;;
	backup)
		echo -n 'RRDstats is creating a backup of .rrd files ... '
		backup silent
		echo "done."
		;;
	restore)
		restore
		;;
	*)
		echo "Usage: $0 [load|unload|start|stop|restart|status|config|backup|restore]" 1>&2
		exit 1
		;;
esac

exit 0