#!/bin/bash
#
# priority: 850
#
# Manage settings for the Zabbix installtion and 
#	other monitor-related things
#
# Stephen Soltesz <soltesz@cs.princeton.edu>
# Copyright (C) 2008 The Trustees of Princeton University
#
# $Id$
#

# Source function library and configuration
. /etc/plc.d/functions
. /etc/plc.d/monitor.functions
. /etc/planetlab/plc_config
local_config=/etc/planetlab/configs/site.xml

MONITORPATH=/usr/share/monitor
# Be verbose
set -x


function if_present_load ()
{
    file=$1
    if [ -f $file ] ; then
        psql -d $ZABBIX_DB_NAME -U $ZABBIX_DB_USER < $file
    fi
}


function check_zabbix_schema_and_data() 
{
    schema_present=$( psql -U $ZABBIX_DB_USER $ZABBIX_DB_NAME -c "\d;" < /dev/null | grep hosts )
    if [ -z $schema_present ] ; then
        echo "... initial import can take SEVERAL minutes. please wait ..."
        if_present_load "/usr/local/zabbix/misc/create/schema/postgresql.sql"
        if_present_load "/usr/local/zabbix/misc/create/data/data.sql"
        if_present_load "/usr/local/zabbix/misc/create/data/images_pgsql.sql"
	## TODO: update ZABBIX Server entry, "update hosts set status=0, host='MyPLC Server' where hostid=10017"
    fi
}

function check_zabbix_templates_and_import ()
{
	# LOG IN
	COOKIE_FILE=/tmp/cookiejar.txt
	rm -f ${COOKIE_FILE}
	TEMPLATES_DIR=${MONITORPATH}/zabbix/templates
	curl -s --cookie $COOKIE_FILE --cookie-jar $COOKIE_FILE \
			--form "enter=Enter" \
			--form "name=Admin" \
			--form "password=zabbix" \
			"http://${PLC_MONITOR_HOST}/zabbix/index.php?login=1"
	
	deleted=$( grep 'deleted' $COOKIE_FILE )
	if [ -n "$deleted" ] ; then
		echo "Login to the zabbix web server failed!!!"
		return 1
	fi

	for file in ${TEMPLATES_DIR}/*.xml ; do 
		# 0 - update , 1 - skip, 0 - add
		echo "############### IMPORTING $file" >> /var/log/monitor.log
		curl -s --cookie $COOKIE_FILE --cookie-jar $COOKIE_FILE \
			--form "config=1" \
			--form "import_file=@${file}" \
			--form "rules[host][exist]=0" \
			--form "rules[host][missed]=0" \
			--form "rules[template][exist]=0" \
			--form "rules[template][missed]=1" \
			--form "rules[item][exist]=0" \
			--form "rules[item][missed]=0" \
			--form "rules[trigger][exist]=0" \
			--form "rules[trigger][missed]=0" \
			--form "rules[graph][exist]=0" \
			--form "rules[graph][missed]=0" \
			--form "import=Import" \
			"http://${PLC_MONITOR_HOST}/zabbix/exp_imp.php" >> /var/log/monitor.log
	done
}

function check_zab_server ()
{
	ZABBIXCFG=/etc/zabbix
	TMP_FILE=`mktemp /tmp/zbxtmpXXXXXX`

	if [ -f ${ZABBIXCFG}/zabbix_server.conf ] ; then
		sed -e "s/#DBHost=.*/DBHost=$PLC_MONITOR_HOST/g" \
		    -e "s#DBName=.*#DBName=$ZABBIX_DB_NAME#g" \
		    -e "s#DBUser=.*#DBUser=$ZABBIX_DB_USER#g" \
		    -e "s#DBPassword=.*#DBPassword=$PLC_MONITOR_DBPASSWORD#g" \
		    -e "s#.*ExternalScripts=.*#ExternalScripts=${MONITORPATH}/zabbix#g" \
		    ${ZABBIXCFG}/zabbix_server.conf > $TMP_FILE
		cat $TMP_FILE > ${ZABBIXCFG}/zabbix_server.conf
	fi
	service zabbix_server start
	rm -f $TMP_FILE

}
function check_zab_agentd ()
{
	ZABBIXCFG=/etc/zabbix
	TMP_FILE=`mktemp /tmp/zbxtmpXXXXXX`
	if [ -f ${ZABBIXCFG}/zabbix_agentd.conf ] ; then
		HOST=`hostname`
		sed -e "s#Server=.*#Server=$PLC_MONITOR_HOST#g" \
		    -e "s#Hostname=.*#Hostname=$HOST#g" \
		    ${ZABBIXCFG}/zabbix_agentd.conf > $TMP_FILE
		cat $TMP_FILE > ${ZABBIXCFG}/zabbix_agentd.conf 
	fi
	service zabbix_agentd start
	rm -f $TMP_FILE
}
function check_zab_webconfig()
{
	# SETUP zabbix gui configuration
	ZABBIX_WEB_CFG=/var/www/html/zabbix/conf/zabbix.conf.php 
	if [ ! -f $ZABBIX_WEB_CFG ] ; then
		touch  $ZABBIX_WEB_CFG
		cat <<EOF > $ZABBIX_WEB_CFG
<?php
global \$DB;

\$DB["TYPE"]		= "POSTGRESQL";
\$DB["SERVER"]		= "localhost";
\$DB["PORT"]		= "0";
\$DB["DATABASE"]		= "$ZABBIX_DB_NAME";
\$DB["USER"]		= "$ZABBIX_DB_USER";
\$DB["PASSWORD"]		= "$PLC_MONITOR_DBPASSWORD";
\$ZBX_SERVER		= "$PLC_MONITOR_HOST";
\$ZBX_SERVER_PORT	= "10051";
\$IMAGE_FORMAT_DEFAULT	= IMAGE_FORMAT_PNG;
?>
EOF
		chmod 644 $ZABBIX_WEB_CFG
	fi
}

if [ "$PLC_ZABBIX_ENABLED" != "1" ] ; then
    exit 0
fi


case "$1" in
	start)
		MESSAGE=$"Bootstrap Zabbix (please wait...)"
		dialog "$MESSAGE"

		# DATABASE acces, creation, and data loading
		check_pg_hba $ZABBIX_DB_NAME $ZABBIX_DB_USER
		check_user_and_db $ZABBIX_DB_NAME $ZABBIX_DB_USER

		if [ -n "$WROTE_PG_CONFIG" ] ; then
			# NOTE: restart db to enable access by users granted above.
			service plc restart postgresql
			service plc restart httpd
			MESSAGE=$"Bootstrap Zabbix 2 (please wait...)"
			dialog "$MESSAGE"
		fi

		check_zabbix_schema_and_data
		check_zabbix_templates_and_import

		# START zabbix services.  SETUP default config files.
		check_zab_server
		check_zab_agentd
		check_zab_webconfig

		result "$MESSAGE"
	;;

	sync)
		MESSAGE=$"Syncing PLC db with Zabbix DB"
		dialog "$MESSAGE"

		# turn off zabbix server, etc. before writing to the db.
		service plc stop monitor-zabbix

		$MONITORPATH/zabbix/zabbixsync.py --setupids &> /var/log/monitor-server
		$MONITORPATH/zabbix/zabbixsync.py --setupglobal 2>&1 >> /var/log/monitor-server
		# import any templates
		check_zabbix_templates_and_import

		service plc start monitor-zabbix 
		
		result "$MESSAGE"
	;;

	delete)
		MESSAGE=$"Deleting Zabbix databases..."
		dialog "$MESSAGE"

		dropdb -U postgres $ZABBIX_DB_NAME
		dropuser -U postgres $ZABBIX_DB_USER

		result "$MESSAGE"
	;;

	stop)
		MESSAGE=$"Stopping Zabbix"
		dialog "$MESSAGE"

		service zabbix_server stop
		service zabbix_agentd stop

		result "$MESSAGE"
	;;
esac

exit $ERRORS