#!/usr/bin/env bash
set -euo pipefail

check_cmd() {
  local name="$1"; shift
  if command -v "$name" >/dev/null 2>&1; then
    printf "✅ %-14s %s\n" "$name" "$("$name" --version 2>/dev/null | head -n1 || echo present)"
  else
    printf "❌ %-14s %s\n" "$name" "not found"
    return 1
  fi
}

echo "=== DTO Prerequisites Check ==="
rc=0
check_cmd nats-server || rc=1
check_cmd dragonfly   || rc=1
check_cmd java        || rc=1

if [[ $rc -ne 0 ]]; then
  echo "\nSome prerequisites are missing. See scripts/install_prereqs.sh to install."
  exit $rc
fi

echo "All prerequisites detected."