#!/usr/bin/env bash 

# début des fonctions

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

help() {
	cat << EOF

`basename $0` copie votre clé publique dans un système virtuel.

`synopsis`

-h      : affiche cette aide
-i	: indique le fichier contenant la clé publique à copier

EOF
}

usage() {
	synopsis
	exit 1
}

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

	LAST="$1"
}


# Programme principal

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

IDENTITY=""

args $@

LOGIN="$USER@"
GUEST_NAME=$LAST
if echo $LAST | grep -q '@'; then
	LOGIN=`echo $LAST | cut -d '@' -f 1`@
	GUEST_NAME=`echo $LAST | cut -d '@' -f 2`
fi

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

[ $GUEST_NAME != nested ] && setGuestVars $GUEST_NAME

GUEST_OWNER=$USER

[ $GUEST_NAME != nested ] && loadGuestVars $GUEST_NAME

if [ $GUEST_NAME = nested ]; then
    SSH_REDIR_PORT=2222
    SSH_GUEST_MASTER=0
else
	[ ! -e $TMPDIR/vdn-$GUEST_NAME-$GUEST_OWNER-redirs ] && {
		echo "Le fichier $TMPDIR/vdn-$GUEST_NAME-$GUEST_OWNER-redirs n'existe pas !" >&2
		echo "Le système $GUEST_NAME est-il démarré ?" >&2
		exit 1
	}

	SSH_REDIR_PORT=`cat $TMPDIR/vdn-$GUEST_NAME-$GUEST_OWNER-redirs  | \
		sed -rne 's/^tcp:([0-9]+):22(:|$).*$/\1/p'`
fi

if [ -z "$SSH_REDIR_PORT" ]; then
	echo "Aucune redirection vers le port 22 du système $GUEST_NAME !" >&2
	exit 1
fi

opts="-p $SSH_REDIR_PORT -o NoHostAuthenticationForLocalhost=yes"

[ -n "$IDENTITY" ] && opts="-i $IDENTITY $opts"


RUSER=$USER
RUSER=$(echo $@ | sed -rne 's/^.*(^|[[:space:]])(.*)@.*$/\2/p')
[ -z "$RUSER" ] && RUSER=$USER

name=$(echo $@ | sed -re 's/^.*@(.*)$/\1/')
args=$(echo $LAST | sed -re "s/$name/localhost/g")

ssh-copy-id $opts $args

[ $? -eq 0 ] && {
	echo -e "Try : \n\nvdn-ssh $RUSER@$name\n"
}