#!/bin/sh

set -e
umask 027

# Create a tmp folder
TMPDIR="$SNAP_COMMON/tmp"
mkdir -p -m 750 $TMPDIR

SERVER_CONF="$SNAP_DATA/server.conf"
START_CONF="$SNAP_DATA/start.conf"
CONFIG_MARK="$SNAP_DATA/version.2"

SPREED_WEBRTC_PID="$SNAP_DATA/spreed.pid"
REDIRECTOR_PID="$SNAP_DATA/redirector.pid"

TLS_KEY="$SNAP_DATA/tls.key"
TLS_CERT="$SNAP_DATA/tls.crt"

TLS_DAYS=3650
TLS_BITS=2048

OPENSSL="/usr/bin/openssl"
RANDFILE="$SNAP_DATA/.rnd"
export RANDFILE

cleanup () {
	trap "" EXIT
	echo "Stopping ..."
	if [ -n "$REDIRECTOR_PID" ]; then
		kill -TERM $REDIRECTOR_PID 2>/dev/null
	fi
	if [ -n "$SPREED_WEBRTC_PID" ]; then
		kill -TERM $SPREED_WEBRTC_PID 2>/dev/null
	fi
	rm -f "$TMPDIR/spreed-webrtc.conf"
	echo "Done."
}
trap "cleanup" INT QUIT TERM EXIT

config () {
	if [ ! -e "$START_CONF" -o ! -e "$SERVER_CONF" -o ! -e "$CONFIG_MARK" ]; then
		echo "Updating configuraion ..."
		"$SNAP/bin/config" update >/dev/null
		touch "$CONFIG_MARK"
	fi
	if [ -e "$START_CONF" ]; then
		. "$START_CONF"
	fi
}

make_tls_key_and_cert () {
	if grep -Fxq "https = off" "$SERVER_CONF"; then
		return
	fi
	if [ ! -e "$TLS_CERT" ]; then
		# Create self signed TLS certificate.
		rm -f "$TLS_KEY"
		$OPENSSL req -new -x509 -nodes -newkey rsa:$TLS_BITS \
			-keyout "$TLS_KEY" \
			-out "$TLS_CERT" -days $TLS_DAYS \
			-config "$SNAP/ssleay.cnf" -sha256 -extensions req_v3
	fi
}

# Create random strings.
#sessionSecret=$($OPENSSL rand -hex 32)
#encryptionSecret=$($OPENSSL rand -hex 24)
#serverToken=$($OPENSSL rand -hex 16)

spreed_webrtc () {
	# Create runtime configuration.
	sed "\
	s|root = .*|root = $SNAP/share/spreed-webrtc-server/www|; \
	s|extra = .*|extra = $SNAP/extra|; \
	s|key = .*|key = $TLS_KEY|; \
	s|certificate = .*|certificate = $TLS_CERT|; \
	" $SERVER_CONF > "$TMPDIR/spreed-webrtc.conf"

	"$SNAP/sbin/spreed-webrtc-server" -c "$TMPDIR/spreed-webrtc.conf" &
	SPREED_WEBRTC_PID=$!
}

redirector () {
	if [ -z "$REDIRECTOR_PORT" -o -z "$WEBAPP_PORT" ]; then
		return
	fi
	"$SNAP/bin/redirector" --port $REDIRECTOR_PORT $WEBAPP_PORT &
	REDIRECTOR_PID=$!
}

make_tls_key_and_cert
config
redirector
spreed_webrtc

echo "Running $SPREED_WEBRTC_PID ..."
wait $SPREED_WEBRTC_PID