// Shared chatbot config cache — used by admin/chatbot and chat routes

let _cachedAt = 0;
let _cachedConfig: Record<string, string> | null = null;
const CACHE_TTL = 5 * 60 * 1000; // 5 minutes

export function invalidateChatbotCache() {
  _cachedAt = 0;
  _cachedConfig = null;
}

export function resetCacheTimestamp() {
  _cachedAt = 0;
}

export async function getChatbotConfig(): Promise<Record<string, string>> {
  const now = Date.now();
  if (_cachedConfig && now - _cachedAt < CACHE_TTL) {
    return _cachedConfig;
  }

  // Dynamic import to avoid circular dependency
  const { db } = await import('@/lib/db');
  const rows = await db.siteSetting.findMany({
    where: {
      key: { startsWith: 'chatbot_' },
    },
  });

  const config: Record<string, string> = {};
  for (const row of rows) {
    config[row.key] = row.value;
  }

  _cachedConfig = config;
  _cachedAt = now;
  return config;
}