#!/usr/bin/env bash
#
# S-16c (#124): assert the golden-signal metrics pipeline works — the .NET services expose
# /metrics and Prometheus scrapes them — against an ALREADY-RUNNING full stack. Runs the
# driver in a python:3-slim container on the stack network (services reached by container IP;
# the runner can't reach published ports — gitea-actions-gotchas.md §5/§6). Does NOT manage
# the stack lifecycle.
set -euo pipefail

here="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"

ip() { docker inspect -f '{{range .NetworkSettings.Networks}}{{.IPAddress}}{{end}}' "$1"; }

bff="$(docker ps -q --filter 'name=[-_]bff[-_]' | head -1)"
prom="$(docker ps -q --filter 'name=[-_]prometheus[-_]' | head -1)"
[ -n "$bff" ] && [ -n "$prom" ] || { echo "ERROR: bff and/or prometheus not running — bring the stack up first" >&2; exit 1; }
net="$(docker inspect -f '{{range $k,$_ := .NetworkSettings.Networks}}{{$k}}{{"\n"}}{{end}}' "$bff" | head -1)"
bff_ip="$(ip "$bff")"; prom_ip="$(ip "$prom")"
echo ">> network=$net bff=$bff_ip prometheus=$prom_ip"

cid="$(docker create --network "$net" \
  -e "BFF=http://$bff_ip:8080" -e "PROMETHEUS=http://$prom_ip:9090" \
  -e "METRICS_TIMEOUT=${METRICS_TIMEOUT:-90}" \
  python:3-slim python /metrics-check.py)"
docker cp "$here/metrics-check.py" "$cid:/metrics-check.py" >/dev/null
rc=0; docker start -a "$cid" || rc=$?
docker rm -f "$cid" >/dev/null
exit $rc