#!/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

set -eu

port=$1
metric_name=$2
retry_count=$3

shift 3

counter=0
while [ $counter -lt $retry_count ]; do
	metric=$(curl -s http://127.0.0.1:$port/metrics | grep $metric_name | wc -l)
	if [ $metric -eq 0 ]; then
		exit 0
	fi
	((counter += 1))
	echo "wait for valid metric for $counter-th time"
	sleep 1
done

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