#!/usr/bin/env bash 

set -eu

synopsis() {
	cat << EOF
Usage : `basename $0` [-h] system
EOF
}

help() {
	cat << EOF

`basename $0` arrête le système (la sauvegarde est effectuée).

`synopsis`

-h	: affiche cette aide

Retourne 1 en cas d'erreur.

EOF
}

usage() {
	synopsis
	exit 1
}

args() {
	local opt
	while getopts "h" opt; do
		case $opt in
			h) help; exit 0;;
			?) usage;;
		esac
	done
	shift $(($OPTIND - 1))
	[ $# -ne 1 ] && usage

	GUEST_NAME="$1"
	if echo $GUEST_NAME | grep -q '/'; then
		error "$GUEST_NAME est un nom de système invalide"
	fi
}

haltSystemTgz() {
	local r=0
	for i in 1 2 3; do
		if vdn-alive $GUEST_NAME; then
			echo "Save $GUEST_NAME..."
			set +e
			vdn-save $GUEST_NAME
			r=$((r+$?))
			set -e
			if [ $? -eq 0 ]; then
				break
			fi
			#sleep 1
		fi
	done

	#sleep 2
	
	if [ $r = 0 ]; then
		vdn-kill $GUEST_NAME || error "Échec de l'arrêt de $GUEST_NAME"
	else 
		return 1
	fi
	#return $r
}



# Programme principal

VDN_PATH=$(readlink -f $(dirname $0)/..); . $VDN_PATH/bin/functions.sh

args "$@"

loadGuestVars $GUEST_NAME

if [ ! -e $GUEST_PATH ]; then
	error "Le système $GUEST_NAME n'existe pas !"
fi

case "$MODE" in
	tgz|tgz2) haltSystemTgz;;
	cow|direct|overlay) vdn-ssh root@$GUEST_NAME poweroff;;
	*) error "Mode : \"$MODE\" invalide !";;
esac