#!/bin/sh
die() { 
	echo >&2 "$@"
	exit 1
}
dietail() {
	echo >&2 "$@"
	echo >&2 "tail $LOG:"
	tail $SERVERBASE/logs/$LOG
	exit 1
}
[ $# -ge 1 ] || die "Syntax: $0 <server version> [--test] [<additional parameters for wesnothd>]"

SERVER=$1
SERVERBASE=$HOME/servers/$SERVER
[ -d "$SERVERBASE" ] || die "Server '$VERSION' not found."
[ -d "$SERVERBASE/logs" ] || mkdir $SERVERBASE/logs

shift
if [ "$1" = "--test" ]; then
	shift
	PARAMETERS=$*
	cd $SERVERBASE/build || exit 1
	bin/wesnothd-$SERVER -c $SERVERBASE/wesnothd.cfg --port 15001 $PARAMETERS
	# remove the socket so it looks like we never ran the server
	rm var/run/socket
	exit 0
fi

PARAMETERS=$*
THREADS=4
PORT=15000

case $SERVER in
	1.4)
		PORT=14998
		THREADS=32
		;;
	1.6)
		PORT=14999
		THREADS=32
		;;
	1.5*)
		PORT=14999
		THREADS=16
		;;
	1.7*)
		PORT=14997
		THREADS=16
		;;
	trunk)
		PORT=15000
		;;
esac

ulimit -Ss 2048
ulimit -c unlimited

# send the standard server message to the appropriate server when killing it with ctrl+c
trap "$HOME/bin/send_server_message $SERVER; sleep 2; echo -n 'terminated: '; date; exit 0" INT

while [ true ] 
do
	cd $SERVERBASE/build || exit 1
	[ -x bin/wesnothd-$SERVER ] || die "Executable 'bin/wesnothd-$SERVER' not found."

	DATE=$(date +"%Y%m%d-%H%M%S")
	[ ! -f "$SERVERBASE/redirect.cfg" ] || PORT=$(sed -re '/port=/!d;s/[ \t]*port="?([0-9]+)"?/\1/' $SERVERBASE/redirect.cfg)
	BUILDDIR=$(ls -ld $SERVERBASE/build | sed -e 's,.*\(\.\./builds/wesnothd-.*/\),\1,')
	REV=r$(echo "$BUILDDIR" | sed -re "s,.*wesnothd-svn-([0-9:SM]+)_$SERVER/$,\1,")
	LOG="wesnothd.$DATE.$REV.log"
	COMMAND="bin/wesnothd-$SERVER -c $SERVERBASE/wesnothd.cfg --port $PORT --threads $THREADS $PARAMETERS"
	$COMMAND &> "$SERVERBASE/logs/$LOG" &

	PID=$!
	echo "started $SERVER server with command: '$COMMAND' (revision: $REV, pid: $PID) logging to: $LOG"
	# create some convenient links
	ln -s "$SERVERBASE/logs/$LOG" "$LOG.$PID"
	rm -f $SERVERBASE/old.log
	mv $SERVERBASE/current.log $SERVERBASE/old.log &> /dev/null
	ln -s "logs/$LOG" $SERVERBASE/current.log
	# wait for the server to terminate
	wait $PID

	EXIT_CODE=$?
	echo "wesnothd exited with code: $EXIT_CODE"
	# need to use the recorded path since the build/ symlink might have changed
	mv "$SERVERBASE/$BUILDDIR/gmon.out" "$SERVERBASE/$BUILDDIR/gmon.$DATE.$REV.out" &> /dev/null
	# check for return code if not zero or 98 (port in use) the server should be restarted
	[ "$EXIT_CODE" != "0" ] || exit 0
	[ "$EXIT_CODE" != "98" ] || dietail #Could not bind to port
done