#!/usr/bin/env bash
# Usage: startup.sh <java-home> <label> <runs> [jvm args...]
# Starts the Spring Boot jar, polls /hello until HTTP 200, and prints wall-clock ms from
# process start to first response plus the committed heap one second later. One line per run,
# then a summary line (min / median / max).
set -u
JH=$1; LABEL=$2; RUNS=$3; shift 3
JAR="$(dirname "$0")/../target/jdk28-zgc-1.0.0.jar"
PORT=${PORT:-18080}
times=()
for r in $(seq 1 "$RUNS"); do
  t0=$(date +%s%N)
  "$JH/bin/java" "$@" -jar "$JAR" --server.port=$PORT --spring.main.banner-mode=off \
      --logging.level.root=WARN > /dev/null 2>&1 &
  PID=$!
  while :; do
    code=$(curl -s -o /dev/null -m 1 -w '%{http_code}' "localhost:$PORT/hello")
    [ "$code" = 200 ] && break
    kill -0 $PID 2>/dev/null || { echo "$LABEL run $r: JVM exited early"; break; }
    sleep 0.02
  done
  t1=$(date +%s%N)
  ms=$(( (t1 - t0) / 1000000 ))
  sleep 1
  committed=$(curl -s "localhost:$PORT/heap" | sed -n 's/.*"committedMiB":\([0-9]*\).*/\1/p')
  echo "$LABEL run $r: first-response ${ms} ms, committed heap ${committed} MiB"
  times+=("$ms")
  kill $PID 2>/dev/null; wait $PID 2>/dev/null
done
sorted=($(printf '%s\n' "${times[@]}" | sort -n))
n=${#sorted[@]}
echo "$LABEL SUMMARY: min ${sorted[0]} ms, median ${sorted[$((n/2))]} ms, max ${sorted[$((n-1))]} ms (n=$n)"