import type { RevalidationConfig } from '@plyaz/types/api';
/**
 * Get SSR-safe revalidation configuration
 * Disables browser-specific features in server environment
 *
 * @param config - Original revalidation configuration
 * @returns SSR-safe configuration
 *
 * @example
 * const safeConfig = getSSRSafeConfig({
 *   refetchOnFocus: true,
 *   refetchOnReconnect: true
 * });
 * // On server: { refetchOnFocus: false, refetchOnReconnect: false }
 * // On client: { refetchOnFocus: true, refetchOnReconnect: true }
 */
export declare function getSSRSafeConfig(config: RevalidationConfig): RevalidationConfig;
/**
 * Check if revalidation features are supported
 *
 * @returns True if browser supports focus/online events
 */
export declare function isRevalidationSupported(): boolean;
/**
 * Calculate effective cache duration based on config
 *
 * @param config - Revalidation configuration
 * @returns Total cache duration in milliseconds
 */
export declare function calculateCacheDuration(config: RevalidationConfig): number;
/**
 * Determine if data should be considered fresh
 *
 * @param lastFetchTime - Timestamp of last fetch
 * @param staleTime - Stale time in seconds
 * @returns True if data is still fresh
 */
export declare function isDataFresh(lastFetchTime: number, staleTime: number): boolean;
/**
 * Determine if cache is still valid
 *
 * @param lastFetchTime - Timestamp of last fetch
 * @param cacheTime - Cache time in seconds
 * @returns True if cache is still valid
 */
export declare function isCacheValid(lastFetchTime: number, cacheTime: number): boolean;
/**
 * Create a revalidation key for deduplication
 *
 * @param url - Request URL
 * @param params - Request parameters
 * @returns Unique key for the request
 */
export declare function createRevalidationKey(url: string, params?: Record<string, unknown>): string;
/**
 * Check if request is within deduplication window
 *
 * @param lastRequestTime - Timestamp of last request
 * @param dedupeTime - Deduplication window in milliseconds
 * @returns True if within deduplication window
 */
export declare function isWithinDedupeWindow(lastRequestTime: number, dedupeTime: number): boolean;
/**
 * Get optimal revalidation config based on network conditions
 *
 * @param baseConfig - Base revalidation configuration
 * @returns Optimized configuration for current network
 */
export declare function getNetworkOptimizedConfig(baseConfig: RevalidationConfig): RevalidationConfig;
/**
 * Convert our revalidation config to fetchff format
 * Maps our naming conventions to fetchff's expected properties
 *
 * @param config - Our revalidation configuration
 * @returns fetchff-compatible configuration
 */
export declare function toFetchffRevalidationConfig(config: RevalidationConfig): Record<string, unknown>;
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