/**
 * Database Connection Module
 *
 * Manages SQLite connection singleton, path management, and database lifecycle.
 */
import Database from 'better-sqlite3';
/**
 * Get the path to the SQLite database file.
 */
export declare function getDbPath(): string;
/**
 * Get the cache directory path.
 */
export declare function getCacheDir(): string;
/**
 * Initialize and return the database connection singleton.
 * Creates the database file and schema if they don't exist.
 */
export declare function initDb(): Database.Database;
/**
 * Get the database connection, initializing if necessary.
 * This is the primary way other modules should access the database.
 */
export declare function getDb(): Database.Database;
/**
 * Clear all detections from the database.
 */
export declare function clearDb(): void;
/**
 * Force recreation of the database.
 * Useful when schema changes require a fresh start.
 * Handles Windows file locking (EBUSY) with retry logic.
 */
export declare function recreateDb(): void;
/**
 * Check if the database file exists.
 */
export declare function dbExists(): boolean;
/**
 * Close the database connection.
 */
export declare function closeDb(): void;