#!/usr/bin/env bash 

#set -x

EDIT=0

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

help() {
	cat << EOF

`basename $0` construit le réseau.

`synopsis`

-h      : affiche cette aide.
-e 		: propose l'édition du script avant la reconstruction
          (la reconstruction n'est faite que si modifications il y a)

Cette commande, après avoir fixé quelques variables, appelle
le script build du réseau.

Si networkDir n'est pas précisé, le réseau défini par la 
variable NETWORK_DIR est (re)créé.

EOF
}

usage() {
	synopsis
	exit 1
}

args() {
	local opt
	while getopts "he" opt; do
		case $opt in
			h) help; exit 0;;
			e) EDIT=1;;
			?) usage;;
		esac
	done
	shift $(($OPTIND - 1))
	NETS=$@
}

# main

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

args "$@"


if [ -z "$NETS" ]; then
	NETS=$NETWORK_DIR
fi

if [ -z "$NETS" ]; then
	error "NETWORK_DIR not set !"
fi

for i in $NETS; do

	if [ -d $i ]; then
		NETWORK_DIR=$i
	elif [ -d $VDN_NETWORKS_BASE_DIR/$i ]; then
		NETWORK_DIR=$VDN_NETWORKS_BASE_DIR/$i
	else
		error "Network : $i not found !"
	fi
	
	echo
	echo "Build : $NETWORK_DIR"

	[ ! -r $NETWORK_DIR/build ] && error "$NETWORK_DIR/build script not found !"

	if [ $EDIT = 1 ]; then
		if [ -w $NETWORK_DIR/build ]; then
			cp $NETWORK_DIR/build $NETWORK_DIR/.build.save
			$EDITOR $NETWORK_DIR/build
			if diff -q $NETWORK_DIR/build $NETWORK_DIR/.build.save > /dev/null; then
				rm $NETWORK_DIR/.build.save
				echo "No modification !"
				exit
			fi
			rm $NETWORK_DIR/.build.save
		else
			echo "En lecture seule !"
			sleep 2
			$EDITOR $NETWORK_DIR/build
			exit
		fi
		rm $NETWORK_DIR/.build.save
	fi

	if [ -w $NETWORK_DIR ]; then
	(
		cd $NETWORK_DIR
		rm -f *.conf
		. build
		echo "Create \"$(basename $NETWORK_DIR)\" config files..."
		echo
		build && echo && vdn-graph
		touch $(readlink -f $NETWORK_DIR)/network.vdn
	)
	else
		echo "$NETWORK_DIR not writable !" >&2

	fi
	
done