#!/bin/bash
set -eu
HOST="${HEALTH_HOST:-127.0.0.1}"
PORT="${HEALTH_PORT:-8080}"
LIVENESS_PATH="${LIVENESS_PATH:-/health/liveness}"
READINESS_PATH="${READINESS_PATH:-/health/readiness}"
USER_AGENT="stellaops-healthcheck"

fetch() {
  target_path="$1"
  url="http://${HOST}:${PORT}${target_path}"
  if command -v curl >/dev/null 2>&1; then
    curl -sf --max-time "${HEALTH_TIMEOUT:-4}" \
      -H "User-Agent: ${USER_AGENT}" \
      "$url" >/dev/null
  elif command -v wget >/dev/null 2>&1; then
    wget -qO- "$url" \
      --header="User-Agent: ${USER_AGENT}" \
      --timeout="${HEALTH_TIMEOUT:-4}" >/dev/null
  else
    # Fallback: bash /dev/tcp (liveness only, no HTTP headers)
    exec 3<>"/dev/tcp/${HOST}/${PORT}" && exec 3>&-
  fi
}

fail=0
if ! fetch "$LIVENESS_PATH"; then
  fail=1
fi
if ! fetch "$READINESS_PATH"; then
  fail=1
fi
exit "$fail"