/**
 * Caching & Performance

 *
 * Cache Jira API responses and ticket briefs with TTL-based invalidation.
 * Optional Redis backend support via interface.
 */
/**
 * Cache interface for optional Redis backend
 */
export interface CacheBackend {
    get<T>(key: string): Promise<T | null>;
    set<T>(key: string, value: T, ttlSeconds: number): Promise<void>;
    delete(key: string): Promise<void>;
    clear(): Promise<void>;
}
/**
 * Cache manager
 */
export declare class Cache {
    private backend;
    private enabled;
    constructor(backend?: CacheBackend, enabled?: boolean);
    /**
     * Get value from cache
     */
    get<T>(key: string): Promise<T | null>;
    /**
     * Set value in cache
     */
    set<T>(key: string, value: T, ttlSeconds?: number): Promise<void>;
    /**
     * Delete value from cache
     */
    delete(key: string): Promise<void>;
    /**
     * Clear all cache entries
     */
    clear(): Promise<void>;
    /**
     * Enable or disable cache
     */
    setEnabled(enabled: boolean): void;
    /**
     * Check if cache is enabled
     */
    isEnabled(): boolean;
    /**
     * Generate cache key for Jira issue
     */
    static keyForIssue(issueKey: string): string;
    /**
     * Generate cache key for ticket brief
     */
    static keyForBrief(ticketKey: string): string;
    /**
     * Generate cache key for Jira API endpoint
     */
    static keyForEndpoint(endpoint: string, params?: Record<string, any>): string;
}
/**
 * Get or create global cache instance
 */
export declare function getCache(backend?: CacheBackend, enabled?: boolean): Cache;
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