#!/usr/bin/env bash
# Boots with BufferingApplicationStartup, then dumps the step tree three ways:
# self time by phase, slowest steps by self time, and the same list by total time
# (which is what /actuator/startup would have you sort by).
set -uo pipefail
source "$(dirname "$0")/env.sh"

"$(dirname "$0")/stop.sh"
"$JAVA_HOME/bin/java" -Dstartup.tracking=buffering -jar "$JAR" > /tmp/startup-app.log 2>&1 &
PID=$!
for _ in $(seq 1 180); do curl -fs -o /dev/null localhost:8080/actuator/health && break; sleep 0.5; done

echo "=== Boot's own startup line ==="
grep -h 'Started StartupDiagnosisApplication' /tmp/startup-app.log | sed 's/^.*: //'
echo
echo "=== /diag/startup ==="
curl -s 'localhost:8080/diag/startup?top=12' > /tmp/diag.json
python3 - <<'PY'
import json
d = json.load(open('/tmp/diag.json'))
print(f"recorded steps: {d['recordedSteps']}\n")
print("-- self time by step name (self = duration minus direct children) --")
print(f"{'self ms':>9}  {'count':>5}  step")
for r in d['phasesBySelfTime']:
    print(f"{r['selfMs']:9.2f}  {r['count']:5d}  {r['step']}")
def bean(t): return t.get('beanName') or t.get('classNames') or ''
print("\n-- slowest individual steps by SELF time (the culprits) --")
print(f"{'self ms':>9}  {'total ms':>9}  step / tags")
for r in d['slowestBySelfTime']:
    print(f"{r['selfMs']:9.2f}  {r['totalMs']:9.2f}  {r['name']} {bean(r['tags'])}")
print("\n-- slowest individual steps by TOTAL time (the containers) --")
print(f"{'total ms':>9}  {'self ms':>9}  step / tags")
for r in d['slowestByTotalTime']:
    print(f"{r['totalMs']:9.2f}  {r['selfMs']:9.2f}  {r['name']} {bean(r['tags'])}")
PY

echo
echo "=== actuator's own endpoint: GET peeks, POST drains ==="
for verb in GET POST POST GET; do
  n=$(curl -s -X $verb localhost:8080/actuator/startup \
      | python3 -c "import sys,json;print(len(json.load(sys.stdin).get('timeline',{}).get('events',[])))" 2>/dev/null || echo "-")
  echo "  $verb  /actuator/startup -> events in response: $n"
done

kill -9 $PID 2>/dev/null
wait $PID 2>/dev/null
true