/**
 * Persistent storage for analytics data using SQLite
 */
import type { AnalyticsEntry, AnalyticsStorage } from './analytics-types.js';
/**
 * SQLite-backed analytics storage
 */
export declare class SqliteAnalyticsStorage implements AnalyticsStorage {
    private db;
    private batchQueue;
    private batchTimer;
    private readonly BATCH_SIZE;
    private readonly BATCH_DELAY_MS;
    constructor(dbPath?: string);
    /**
     * Initialize database schema
     */
    private initializeDatabase;
    /**
     * Save a single analytics entry (batched for performance)
     */
    save(entry: AnalyticsEntry): Promise<void>;
    /**
     * Save multiple analytics entries in a single transaction
     */
    saveBatch(entries: AnalyticsEntry[]): Promise<void>;
    /**
     * Schedule a delayed batch flush
     */
    private scheduleBatchFlush;
    /**
     * Flush the current batch to database
     */
    private flushBatch;
    /**
     * Query analytics entries with optional filters
     */
    query(filters?: Partial<AnalyticsEntry>): Promise<AnalyticsEntry[]>;
    /**
     * Get all entries within a date range
     */
    queryByDateRange(startDate: string, endDate: string): Promise<AnalyticsEntry[]>;
    /**
     * Clear all analytics data
     */
    clear(): Promise<void>;
    /**
     * Get total count of stored entries
     */
    count(): Promise<number>;
    /**
     * Convert database rows to AnalyticsEntry objects
     */
    private rowsToEntries;
    /**
     * Close the database connection
     */
    close(): Promise<void>;
}
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