#!/bin/bash
# ______                           _____ _                   _   _____           _
# | ___ \                         /  ___| |                 | | |_   _|         | |
# | |_/ /   _ _______  _ __ ___   \ `--.| |__   __ _ _ __ __| |   | | ___   ___ | |___
# |    / | | |_  / _ \| '_ ` _ \   `--. \ '_ \ / _` | '__/ _` |   | |/ _ \ / _ \| / __|
# | |\ \ |_| |/ / (_) | | | | | | /\__/ / | | | (_| | | | (_| |   | | (_) | (_) | \__ \
# \_| \_\__, /___\___/|_| |_| |_| \____/|_| |_|\__,_|_|  \__,_|   \_/\___/ \___/|_|___/
#        __/ |
#       |___/
#
# Ryzom - MMORPG Framework <https://ryzom.com/dev/>
# Copyright (C) 2019  Winch Gate Property Limited
# This program is free software: read https://ryzom.com/dev/copying.html for more details
#
# This script helps to manage the shard using a screen session.
# You can start, join, stop and get state of services
#

CMD=$1
DOMAIN=shard

if [[ ! -z "$2" ]]
then
	SHARD_PATH=$2
fi

if [[ -z "$CMD" ]]
then
	echo
	echo Screen sessions currently running:
	screen -list
	echo
	echo "Commands:"
	echo "  'start' to start the ${DOMAIN}"
	echo "  'stop'  to stop the ${DOMAIN}"
	echo "  'join'  to join the ${DOMAIN}'s screen session"
	echo "  'share' to join the ${DOMAIN} in shared mode"
	echo "  'state' to view state information for the ${DOMAIN}"
	echo
	printf "Enter a command: "
	read CMD
fi

if [ "$CMD" = "stop" ]
then
	if [ $(screen -list | grep \\\.${DOMAIN} | wc -l) != 1 ]
	then
		echo Cannot stop domain \'${DOMAIN}\' because no screen by that name appears to be running
		screen -list
	else
		screen -d -r $(screen -list | grep \\\.${DOMAIN}| sed 's/(.*)//') -X quit > /dev/null
		if [ -f $SHARD_PATH/run/aes_state.txt ]
		then
			rm -r $SHARD_PATH/run/*
		fi
	fi
fi

STARTARGS=
if [ "$CMD" = "batchstart" ]
then
	STARTARGS="-d -m"
	CMD="start"
fi

LIGHT=
if [ "$CMD" = "light" ]
then
	LIGHT=".light"
	CMD="start"
fi

if [ "$CMD" = "start" ]
then

	cd $SHARD_PATH/run

	ulimit -c unlimited
	screen -wipe > /dev/null

	if [ $( screen -list | grep \\\.${DOMAIN} | wc -w ) != 0 ]
	then
		echo Cannot start domain \'${DOMAIN}\' because this domain is already started
		screen -list | grep $DOMAIN
	else
		echo "Starting shard screen from $(pwd) with SHARD_PATH=$SHARD_PATH"
		export LD_LIBRARY_PATH=$LD_LIBRARY_PATH:$SHARD_PATH/lib
		export SHARD_PATH=$SHARD_PATH
		screen $STARTARGS -S ${DOMAIN} -c $SHARD_PATH/tools/${DOMAIN}.screen${LIGHT}.rc
	fi
fi

JOINARGS=
if [ "$CMD" = "share" ]
then
	JOINARGS="-x"
	CMD="join"
fi

if [ "$CMD" = "join" ]
then
	if [ $(screen -list | grep \\\.${DOMAIN} | wc -l) != 1 ]
	then
	echo Cannot join domain \'${DOMAIN}\' because no screen by that name appears to be running
	screen -list
	else
	screen -r ${JOINARGS} $(screen -list | grep \\\.${DOMAIN}| sed 's/(.*)//')
	fi
fi

if [ "$CMD" = "state" ]
then
	cd $SHARD_PATH/run
	echo State of domain ${DOMAIN}:
	if [ $(echo */*.state) = "*/*.state" ]
	then
		echo - No state files found
	else
		grep RUNNING */*state
	fi
fi