/**
 * db4ai Client Factory
 *
 * Factory function for creating typed db4ai clients with support for
 * remote endpoints and Cloudflare Workers service bindings.
 *
 * Features:
 * - Connection pooling and reuse
 * - Query caching with configurable TTL
 * - Lazy initialization of resources
 * - Memory-efficient collection management
 *
 * @packageDocumentation
 */
import type { DB4Config, DB4Client, ClientOptions } from './types.js';
/**
 * Create a db4ai client instance.
 *
 * @typeParam TSchema - Schema type mapping collection names to document types
 * @param config - Client configuration (remote endpoint or service binding)
 * @param options - Optional client options for caching, pooling, etc.
 * @returns Typed client with collection accessors
 *
 * @example
 * Remote endpoint:
 * ```typescript
 * const client = db4<{ users: User; posts: Post }>({
 *   endpoint: 'https://api.db4.dev',
 *   apiKey: 'sk_live_...'
 * });
 * ```
 *
 * @example
 * Service binding (Workers):
 * ```typescript
 * const client = db4<{ users: User }>({
 *   binding: env.DB4
 * });
 * ```
 *
 * @example
 * With performance options:
 * ```typescript
 * const client = db4<{ users: User }>({
 *   endpoint: 'https://api.db4.dev',
 *   apiKey: 'sk_live_...'
 * }, {
 *   enableCache: true,
 *   cacheConfig: { defaultTtl: 60000 },
 *   enablePooling: true,
 *   poolConfig: { maxConnections: 20 }
 * });
 * ```
 */
export declare function db4<TSchema extends Record<string, unknown>>(config: DB4Config, options?: ClientOptions): DB4Client<TSchema>;
/**
 * Check if a client is using zero-latency path (service binding).
 */
export declare function isZeroLatency(config: DB4Config): boolean;
/**
 * Get timeout value from configuration.
 */
export declare function getTimeout(config: DB4Config): number;
/**
 * Get retry count from configuration.
 */
export declare function getRetries(config: DB4Config): number;
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