export type HookType = 'beforeInsert' | 'afterInsert' | 'beforeUpdate' | 'afterUpdate' | 'beforeDelete' | 'afterDelete';
export type HookFunction = (table: string, data: any) => Promise<void> | void;
/**
 * Defines the common interface that all database adapters must implement.
 */
export declare abstract class IDatabase {
    protected hooks: Record<HookType, HookFunction[]>;
    /**
     * Registers a lifecycle hook.
     */
    on(hook: HookType, fn: HookFunction): void;
    protected runHooks(hook: HookType, table: string, data: any): Promise<void>;
    /**
     * Returns performance metrics for the database and cache.
     */
    getMetrics(): {
        database: {
            totalOperations: number;
            averageDuration: string;
            slowestOperations: import("./telemetry").DatabaseMetrics[];
            recentLogs: import("./telemetry").DatabaseMetrics[];
        };
        cache: {
            ratio: string;
            hits: number;
            misses: number;
        };
    };
    protected recordMetric(operation: string, table: string, duration: number): void;
    /**
     * Selects multiple records based on the specified conditions.
     */
    abstract select<T = any>(table: string, where?: Record<string, any> | null): Promise<T[]>;
    /**
     * Selects a single record based on the specified conditions.
     */
    abstract selectOne<T = any>(table: string, where?: Record<string, any> | null): Promise<T | null>;
    /**
     * Inserts a new record.
     */
    abstract insert(table: string, data: Record<string, any>): Promise<number | string | any>;
    /**
     * Updates records matching the specified conditions.
     */
    abstract update(table: string, data: Record<string, any>, where: Record<string, any>): Promise<number>;
    /**
     * Updates a record or inserts it as a new record if it doesn't exist (Upsert).
     */
    abstract set(table: string, data: Record<string, any>, where: Record<string, any>): Promise<any>;
    /**
     * Deletes records matching the specified conditions.
     */
    abstract delete(table: string, where: Record<string, any>): Promise<number>;
    /**
     * Inserts multiple records in bulk.
     */
    abstract bulkInsert(table: string, dataArray: Record<string, any>[]): Promise<number>;
    /**
     * Increments numeric fields.
     */
    abstract increment(table: string, increments: Record<string, number>, where: Record<string, any>): Promise<number>;
    /**
     * Decrements numeric fields.
     */
    abstract decrement(table: string, decrements: Record<string, number>, where: Record<string, any>): Promise<number>;
    /**
     * Safely closes the database connection.
     */
    abstract close(): Promise<void>;
}
export default IDatabase;