#!/usr/bin/env bash

die() {
	echo "$1"
	exit 1
}

if [ "$1" = "" ]; then
	echo "The first argument must be the remote containing the production configs"
	die "Other arguments are ignored"
else
	REMOTE="$1"
fi

which rsync 1>/dev/null || die "This script needs rsync"
getent hosts "${REMOTE}" 1>/dev/null || die "The remote ${REMOTE} is not resolvable"

if [ ! -d /etc/wireguard/ ]; then
	mkdir -p /etc/wireguard/
fi

RSYNC_OPTIONS="-aX"
SSH_OPTIONS="-o PreferredAuthentications=publickey"
rsync ${RSYNC_OPTIONS} -e "ssh ${SSH_OPTIONS}" \
	${REMOTE}:/etc/wireguard/ /etc/wireguard/ || \
	die "rsync /etc/wireguard/ failed"
rsync ${RSYNC_OPTIONS} -e "ssh ${SSH_OPTIONS}" \
	${REMOTE}:/etc/conf.d/net.wg* /etc/conf.d/ || \
	die 'rsync /etc/conf.d/net.wg* failed'

for i in /etc/conf.d/net.wg*; do
	# We need the file from the init.d dir
	INITD="${i/conf/init}"
	if [ ! -h ${INITD} ]; then
		ln -s /etc/init.d/net.lo "${INITD}"
		# We only need the file name
		rc-update add $(basename "${INITD}")
		rc-service $(basename "${INITD}") start
	fi
done