#!/bin/bash
# -------
# File:        lliurex-srv-vars
# Description: Updates and changes default values for
#              LliureX server variables
#              
# Authors:     Luis Antonio Garcia Gisbert <garcia_luigis@gva.es>
# 
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License along 
# with this program; if not, write to the Free Software Foundation, Inc., 
# 51 Franklin St, Fifth Floor, Boston MA 02110-1301 USA
# --------

set -e

usage(){
   echo -e "Usage: $(basename $0) set-default [SRV_NUMBER]\n\
       $(basename $0) update\n\
       $(basename $0) simulate-vars SRV_NUMBER"
   exit 1
}

show_ancient_values(){
	# uffffffff 
	. /usr/sbin/llxcfg-vars.sh
	llxcfg_vars_show "$(llxcfg_vars_files |grep "^/usr/")" "$@" 
}

update_vars(){
	SIMULATE=""
	if [ "$1" ] ; then
		SIMULATE="Y"
		SRV_HOST_ID="$1"
	else
		eval "$(llxcfg-showvars "SRV_HOST_ID")"
	fi
	if echo "$SRV_HOST_ID" |grep -q "^[[:digit:]]\+$" && [ $SRV_HOST_ID -gt 0 ] && [ $SRV_HOST_ID -le 254 ] ; then
		if [ "$SRV_HOST_ID" = "254" ] ; then
			# server
			SRV_HOST_ID=254
			DEFAULT_SRV_DOMAIN=centro
			DEFAULT_SRV_IP=10.1.0.254
			DEFAULT_SRV_MASK=255.255.248.0
			LDAP_SRV_MODE="MASTER"
		else
			DEFAULT_SRV_DOMAIN="aula${SRV_HOST_ID}.centro"
			DEFAULT_SRV_IP=10.2.$SRV_HOST_ID.254
			DEFAULT_SRV_MASK=255.255.255.0
			LDAP_SRV_MODE="SLAVE"
		fi
		if [ -z "$SIMULATE" ] ; then
			# llxcfg-systemvars del SRV_DOMAIN
			llxcfg-systemvars add SRV_DOMAIN="$DEFAULT_SRV_DOMAIN" DEFAULT_SRV_DOMAIN="$DEFAULT_SRV_DOMAIN" DEFAULT_SRV_IP="$DEFAULT_SRV_IP" DEFAULT_SRV_MASK="$DEFAULT_SRV_MASK" SRV_HOST_ID="$SRV_HOST_ID"
		fi
	else
		if [ "$SIMULATE" ] ; then
			eval "$(show_ancient_values DEFAULT_SRV_IP DEFAULT_SRV_MASK DEFAULT_SRV_DOMAIN LDAP_SRV_MODE)"
		else
			llxcfg-systemvars del DEFAULT_SRV_DOMAIN DEFAULT_SRV_IP DEFAULT_SRV_MASK SRV_HOST_ID SRV_DOMAIN
		fi
	fi
	# libreria
	LIB_FILE="/usr/share/lliurex/lliurex-srv-common/lliurex-netfuncs.sh"
	if [ "$SIMULATE" ] ; then
		SRV_HOST_ID=""
		eval "$(llxcfg-showvars "SRV_HOST_ID")"
		if [ "$SRV_HOST_ID" ] && [ "$SRV_HOST_ID" = "$NEW_SRV_HOST_ID" ] ; then
			# assume is already configured
			DEFAULT_SRV_DOMAIN="$(lliurex-net get_srv_domain)"
			DEFAULT_SRV_MASK="$(lliurex-net get_srv_mask)"
			DEFAULT_SRV_IP="$(lliurex-net get_srv_ip)"
		fi
		echo "SRV_DOMAIN='$DEFAULT_SRV_DOMAIN'"
		echo "SRV_MASK='$DEFAULT_SRV_MASK'"
		echo "SRV_IP='$DEFAULT_SRV_IP'"
		echo "LDAP_SRV_MODE='$LDAP_SRV_MODE'"
		exit 0
	fi
	[ -e "$LIB_FILE" ] || exit 1
	. $LIB_FILE
	llxcfg-systemvars add "SRV_IP=`get_srv_ip`" \
                      "SRV_MASK=`get_srv_mask`" \
                      "SRV_BITMASK=`get_srv_bitmask`" \
                      "SRV_BCAST=`get_srv_bcast`" \
                      "SRV_NETWORK=`get_srv_network`" \
                      "SRV_MAC=`get_srv_mac`" \
                      "SRV_NIC=`get_srv_nic`" \
                      "SRV_DOMAIN=`get_srv_domain`" \
                      "HOSTNAME_STRING=server.`get_srv_domain`" \
                      "SRV_REVERSE_DOMAIN=`get_srv_reverse_domain`" \
                      "SRV_FQDN=`get_srv_name`.`get_srv_domain`"

}

# main
[ "$1" ] || usage


case "$1" in
	update)
		# create vars
		update_vars
	;;
	set-default)
		shift
		SRV_NUMBER="$1"
		if [ -z "$SRV_NUMBER" ] ; then
			llxcfg-systemvars del SRV_HOST_ID
		else
			llxcfg-systemvars add SRV_HOST_ID="$SRV_NUMBER"
		fi
		update_vars
	;;
	simulate-vars)
		shift
		[ "$1" ] || usage
		NEW_SRV_HOST_ID="$1"
		update_vars "$1"
	;;
	*)
		usage
	;;
esac

exit