#!/usr/bin/env bash
# Rebuilds and runs the env-var-proof/boot40 vs boot41 experiment described in
# docs/03-otel-env-vars.md, and regenerates docs/output/04-otel-env-vars-4.0-vs-4.1.txt.
# Requires JDK 25 and network access (each module resolves its own Boot parent POM).
set -euo pipefail
cd "$(dirname "$0")/.."
ROOT="$(pwd)"

mkdir -p env-var-proof/stub-receiver/out
javac env-var-proof/stub-receiver/StubOtlpReceiver.java -d env-var-proof/stub-receiver/out

(cd env-var-proof/boot40 && mvn -q -DskipTests package)
(cd env-var-proof/boot41 && mvn -q -DskipTests package)

run_case() {
  local label="$1" jar="$2" port="$3"
  shift 3
  local log="/tmp/otel-proof-${label}.log"
  rm -f "$log"
  java -cp env-var-proof/stub-receiver/out StubOtlpReceiver "$port" "$log" &
  local receiver_pid=$!
  sleep 1
  echo "=== $label ==="
  env "$@" timeout 30 java -jar "$jar" | grep -E "Publishing metrics" || true
  kill "$receiver_pid" 2>/dev/null || true
  echo "--- receiver log ($label) ---"
  cat "$log"
}

run_case "boot41-env-vars" "env-var-proof/boot41/target/otel-env-proof-41-1.0.0.jar" 24318 \
  OTEL_EXPORTER_OTLP_ENDPOINT="http://localhost:24318" OTEL_METRIC_EXPORT_INTERVAL=2000
run_case "boot40-env-vars" "env-var-proof/boot40/target/otel-env-proof-40-1.0.0.jar" 24319 \
  OTEL_EXPORTER_OTLP_ENDPOINT="http://localhost:24319" OTEL_METRIC_EXPORT_INTERVAL=2000
run_case "boot40-management-props" "env-var-proof/boot40/target/otel-env-proof-40-1.0.0.jar" 24320 \
  MANAGEMENT_OTLP_METRICS_EXPORT_URL="http://localhost:24320/v1/metrics" MANAGEMENT_OTLP_METRICS_EXPORT_STEP=2s

echo "Compare the three receiver logs above against docs/output/04-otel-env-vars-4.0-vs-4.1.txt"