#! /bin/sh

me=`basename $0`
dir=`dirname $0`
LOGGER="logger -i -t '$me'"

# Always redirect stderr somewhere, otherwise the shell script will die
# when it tries to do I/O related stuff on closed file descriptor.
# Our default is to throw it down the bit-bucket.
#exec 2> /dev/console
## If you wish to trace this script:
#exec 2> "/tmp/${me}_$XBUS_NAME" 1>&2

PATH="$dir:/usr/sbin:/sbin:/usr/bin:/bin"

set -e

TWS_SETUP="/etc/dahdi/twinstar_setup.conf"
if [ ! -r "$TWS_SETUP" ]; then
	echo "Skip($ACTION): No '$TWS_SETUP'" | $LOGGER
	exit 0
fi
SYSTEMCONF="/tmp/xortel/dahdi/system.conf"
dahdi_registration="/usr/sbin/dahdi_registration"
dahdi_cfg="/usr/sbin/dahdi_cfg"
xpp_blink="/usr/sbin/xpp_blink"
twinstar="/usr/sbin/twinstar"

TWS_DIR="/var/tmp"
TWS_PREFIX="$TWS_DIR/twinstar-"
LABELFILE="/sys/$DEVPATH/label"
export XBUS_SORT='SORT_LABEL'

echo "starting($ACTION): '$*'" | $LOGGER
STAMP="${TWS_PREFIX}${XBUS_NAME}"
TWS_TOTAL=`sed -e 's/#.*//' -e '/^[ 	]*$/d' "$TWS_SETUP" | wc -l`

case "$ACTION" in
online)
	if [ ! -f "$LABELFILE" ]; then
		echo "Missing labelfile '$LABELFILE'" | $LOGGER
		exit 1
	fi
	LABEL=`cat $LABELFILE`
	TWS_LINE=`awk "/^$LABEL/" $TWS_SETUP`
	if [ "$TWS_LINE" = "" ]; then
		echo "online($XBUS_NAME): '$LABEL' is not in '$TWS_SETUP'" | $LOGGER
		exit 1
	fi
	echo "$LABEL" > "$STAMP"
	HOW_MANY=`ls ${TWS_PREFIX}* | wc -l`
	echo "online($XBUS_NAME): $LABEL (${HOW_MANY}/${TWS_TOTAL})" | $LOGGER
	"$twinstar" enable-wd
	if [ "$HOW_MANY" -eq "$TWS_TOTAL" ]; then
		echo "online: GOT ALL $TWS_TOTAL" | $LOGGER
		"$dahdi_registration" on
		"$dahdi_registration" 2>&1 | $LOGGER
		echo "Using '$SYSTEMCONF'" 2>&1 | $LOGGER
		"$dahdi_cfg" -v -c "$SYSTEMCONF" 2>&1 | $LOGGER
		asterisk -rx 'module load chan_dahdi.so' 2>&1 | $LOGGER
		sleep 1	# Just for visual effect
		"$xpp_blink" bzzt xpd "$XBUS_NUM"
		ports=`"$twinstar" ports`
		if [ "$ports" = 0 ]; then
			play /usr/share/zaptel/primary-pbx-is-ready.wav || :
		elif [ "$ports" = 1 ]; then
			play /usr/share/zaptel/backup-pbx-is-ready.wav || :
		fi
		echo "online: READY" | $LOGGER
	fi
	;;
offline)
	LABEL=`cat $STAMP`
	TWS_LINE=`awk "/^$LABEL/" $TWS_SETUP`
	rm -f "$STAMP"
	if [ "$TWS_LINE" = "" ]; then
		echo "offline($XBUS_NAME): $LABEL is not in $TWS_SETUP" | $LOGGER
		exit 1
	fi
	echo "offline($XBUS_NAME): $LABEL" | $LOGGER
	"$twinstar" disable-wd
	# If we want to disconnect everybody
	"$twinstar" jump
	asterisk -rx 'module unload chan_dahdi.so'
	;;
*)
	echo "$0: Unknown ACTION='$ACTION'" | $LOGGER
	echo "$0: ARGS='$*'" | $LOGGER
	echo "$0: ENV:" | $LOGGER
	env | $LOGGER
	exit 1
esac