import type { DatabasePoolEventEmitter } from "../types.js";
import type { Driver, DriverClientEventEmitter, DriverClientState, DriverQueryOptions, DriverQueryResult, DriverStream, DriverStreamResult } from "@slonik/driver";
export type ConnectionPool = {
    acquire: () => Promise<ConnectionPoolClient>;
    end: () => Promise<void>;
    id: () => string;
    state: () => ConnectionPoolState;
    warmup: () => Promise<void>;
};
export type ConnectionPoolClient = {
    acquire: () => void;
    destroy: () => Promise<void>;
    events: DatabasePoolEventEmitter;
    id: () => string;
    off: DriverClientEventEmitter["off"];
    on: DriverClientEventEmitter["on"];
    query: (query: string, values?: unknown[], queryOptions?: DriverQueryOptions) => Promise<DriverQueryResult>;
    release: () => Promise<void>;
    removeListener: DriverClientEventEmitter["removeListener"];
    state: () => DriverClientState;
    stream: (query: string, values?: unknown[]) => DriverStream<DriverStreamResult>;
};
/**
 * @property {number} acquiredConnections - The number of connections that are currently acquired.
 */
type ConnectionPoolState = {
    acquiredConnections: number;
    idleConnections: number;
    pendingConnections: number;
    pendingDestroyConnections: number;
    pendingReleaseConnections: number;
    state: ConnectionPoolStateName;
    waitingClients: number;
};
type ConnectionPoolStateName = "ACTIVE" | "ENDED" | "ENDING";
export declare const createConnectionPool: ({ driver, events, idleTimeout, maximumConnectionAge, maximumPoolSize, minimumPoolSize, }: {
    driver: Driver;
    events: DatabasePoolEventEmitter;
    /**
     * Idle timeout in milliseconds. Use Number.POSITIVE_INFINITY to disable.
     */
    idleTimeout: number;
    /**
     * The maximum age of a connection in milliseconds.
     * After this age, the connection will be destroyed.
     * Use Number.POSITIVE_INFINITY to disable.
     */
    maximumConnectionAge: number;
    maximumPoolSize: number;
    minimumPoolSize: number;
}) => ConnectionPool;
export {};
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