/**
 * Simple cache interface for email validator
 * Mirrors the logging pattern - pass as optional parameter
 */
import type { DisposableEmailResult, DomainValidResult, FreeEmailResult, SmtpVerificationResult } from './types';
import type { ParsedWhoisResult } from './whois-parser';
/**
 * Generic cache interface that can be implemented by any cache store
 */
export interface CacheStore<T = any> {
    /**
     * Get a value from cache
     * @param key - The cache key
     * @returns The cached value or null/undefined if not found or expired
     */
    get(key: string): Promise<T | null | undefined> | T | null | undefined;
    /**
     * Set a value in cache with optional TTL
     * @param key - The cache key
     * @param value - The value to cache
     * @param ttlMs - Optional TTL in milliseconds
     */
    set(key: string, value: T, ttlMs?: number): Promise<void> | void;
    /**
     * Delete a value from cache
     * @param key - The cache key
     */
    delete(key: string): Promise<boolean> | boolean;
    /**
     * Check if a key exists in cache
     * @param key - The cache key
     */
    has(key: string): Promise<boolean> | boolean;
    /**
     * Clear all values from cache
     */
    clear(): Promise<void> | void;
    /**
     * Get the current size of cache (number of entries)
     * Returns undefined if size is not applicable (e.g., Redis)
     */
    size?(): number | undefined;
}
/**
 * Cache interface for different types of data
 * Uses rich result types instead of boolean values for better debugging and analytics
 */
export interface Cache {
    mx: CacheStore<string[]>;
    /** Rich result: includes isDisposable, source, category, and checkedAt */
    disposable: CacheStore<DisposableEmailResult>;
    /** Rich result: includes isFree, provider, and checkedAt */
    free: CacheStore<FreeEmailResult>;
    /** Rich result: includes isValid, hasMX, mxRecords, and checkedAt */
    domainValid: CacheStore<DomainValidResult>;
    /** Rich result: includes isValid, mxHost, port, reason, tlsUsed, and checkedAt */
    smtp: CacheStore<SmtpVerificationResult>;
    smtpPort: CacheStore<number>;
    domainSuggestion: CacheStore<{
        suggested: string;
        confidence: number;
    } | null>;
    whois: CacheStore<ParsedWhoisResult>;
}