#!/usr/bin/env bash
set -euo pipefail

# DEVOPS-OBS-51-001: simple SLO burn-rate evaluator

PROM_URL=${PROM_URL:-"http://localhost:9090"}
OUT="out/obs-slo"
mkdir -p "$OUT"

query() {
  local q="$1"
  curl -sG "${PROM_URL}/api/v1/query" --data-urlencode "query=${q}"
}

echo "[slo] querying error rate (5m)"
query "(rate(service_request_errors_total[5m]) / rate(service_requests_total[5m]))" > "${OUT}/error-rate-5m.json"

echo "[slo] querying error rate (1h)"
query "(rate(service_request_errors_total[1h]) / rate(service_requests_total[1h]))" > "${OUT}/error-rate-1h.json"

echo "[slo] done; results in ${OUT}"