import { Pool, PoolConfig } from 'pg';
import { IDatabaseClient } from './IDatabaseClient';
import { RetryOptions } from '../core/types';
/**
 * Creates a PostgreSQL database client
 *
 * This function initializes a PostgreSQL database client with the provided pool configuration
 * and optional retry options. It sets up monitoring for connection events and query operations.
 *
 * @param pool - The PostgreSQL pool instance
 * @param retryOptions - Optional retry options for failed queries
 * @param poolConfig - Optional pool configuration
 * @param installUnaccentExtension - Optional flag to install unaccent extension
 * @returns IDatabaseClient - The PostgreSQL database client instance
 *
 * @example
 * const pgClient = await createPgClient(pool, { retries: 3, factor: 2, minTimeout: 1000 });
 *
 * @example
 * const pgClient = await createPgClient(pool, { retries: 3, factor: 2, minTimeout: 1000 });
 *
 * @example
 * const pgClient = await createPgClient(pool, { retries: 3, factor: 2, minTimeout: 1000 });
 */
export declare const createPgClient: (pool: Pool, retryOptions?: RetryOptions, poolConfig?: PoolConfig, installUnaccentExtension?: boolean) => Promise<IDatabaseClient>;