// Reports which backend each scalable subsystem is using, for the health
// endpoint and startup logging.

import { isRedisEnabled, isRedisHealthy, getRedisHealthDetail } from './redis.js';
import { getRateLimiter } from './stores/rateLimiter.js';
import { getPubSub } from './stores/pubsub.js';
import { getCache } from './stores/cache.js';
import { getLock } from './stores/lock.js';
import { getLoginLockout } from './stores/loginLockout.js';
import { getStorage } from './storage.js';

export function describeBackends() {
  return {
    cache: getCache().backend,
    rateLimiter: getRateLimiter().backend,
    pubsub: getPubSub().backend,
    lock: getLock().backend,
    loginLockout: getLoginLockout().backend,
    storage: getStorage().backend,
  };
}

export function describeRedis() {
  return { enabled: isRedisEnabled(), healthy: isRedisHealthy(), ...getRedisHealthDetail() };
}

/** Log one line per subsystem at startup so the active backend is obvious. */
export function logSelectedBackends(): void {
  const b = describeBackends();
  const r = describeRedis();
  console.log('[startup] Subsystem backends:');
  console.log(`  redis:        ${r.enabled ? 'enabled' : 'disabled (in-memory fallback)'}`);
  console.log(`  cache:        ${b.cache}`);
  console.log(`  rate limiter: ${b.rateLimiter}`);
  console.log(`  pub/sub:      ${b.pubsub}`);
  console.log(`  lock:         ${b.lock}`);
  console.log(`  login lockout:${b.loginLockout}`);
  console.log(`  storage:      ${b.storage}`);
}