set -e

TMPF=$(mktemp)

cp /etc/turnserver/turnserver.conf $TMPF

IPADD=$(curl ip.me 2>/dev/null)

if [ ! -f "/etc/turnserver/turnserver.conf" ]
then
	touch /etc/turnserver/error
	if [ ! -f "/etc/turnserver/error" ]
	then
		touch /etc/turnserver/error
		echo "/etc/turnserver/turnserver.conf does not exist."
		echo "Please remove /etc/turnserver-error once the issue is resolved to unsilence errors."
		exit 1
	else
		exit
	fi
fi

if [ -z "$IPADD" ]
then
	if [ ! -f "/etc/turnserver/error" ]
	then
		touch /etc/turnserver/error
		echo "There was an issue getting the public IP address."
		echo "Please remove /etc/turnserver/turnserver-error once the issue is resolved to unsilence errors."
		exit 1
	else
		exit
	fi
fi

sed -i "s/^external-ip=.*/external-ip=$IPADD/g" "$TMPF"

if [ -n "$(diff $TMPF /etc/turnserver/turnserver.conf)" ]
then
	cp $TMPF /etc/turnserver/turnserver.conf
	systemctl restart coturn
	echo "IP address for Coturn changed to: $IPADD"
	echo "Coturn has been restarted."
fi