#!/bin/sh

OPTIND=1

while getopts "H:" opt; do
    case "$opt" in
    H)
	hostname=$OPTARG
	;;
    esac
done

shift $((OPTIND-1))

[ "$1" = "--" ] && shift

if [ -z $hostname ]
then
	echo "ERROR: please provide IP with -H: $0 -H <IP>"
	exit 3
fi

score=`curl --silent "http://www.pool.ntp.org/scores/$hostname/log?limit=1" 2>&1 | tail -1 | cut -f 5 -d ","`

if [ $score == "" ]
then
	echo "UNKNOWN: unable to parse result"
	exit 3
fi

result=`echo "$score >= 20" | bc` 
if [ $result == 1 ]
then
	echo "OK: score=$score|score=$score;;;;"
	exit 0
fi
result=`echo "$score > 10" | bc` 
if [ $result == 1 ]
then
	echo "WARNING: score=$score|score=$score;;;;"
	exit 1
else
	echo "CRITICAL: score=$score|score=$score;;;;"
	exit 2
fi