#!/bin/bash
# parameter 1: port
# parameter 2: metric name
# parameter 3: retry count, if check failed we will wait 1s before next retry, until retry time exceeds retry count
# parameter 4...: valid value list

set -eu

port=$1
metric_name=$2
retry_count=$3
lower=$4
upper=$5

shift 3

counter=0
while [ $counter -lt $retry_count ]; do
	metric=$(curl -s http://127.0.0.1:$port/metrics | grep $metric_name | grep -v "#" | awk '{printf("%d",$2)}')
	if [ -n $metric ] && [ $lower -lt $metric ] && [ $metric -lt $upper ]; then
		exit 0
	fi
	((counter += 1))
	echo "wait for valid metric of $metric_name for $counter-th time, got value: '$metric'"
	sleep 1
done

echo "metric $metric_name has invalid value $metric"
exit 1