import { EventEmitter } from 'node:events';
import { MongoClient, Collection, Db, Document } from 'mongodb';
import type { MongoConnectionContract } from '../types/database.js';
import type { MongoDBConnectionConfig } from '../define_config.js';
/**
 * MongoDB connection class manages a given database connection.
 * It uses the official MongoDB driver to establish and manage connections.
 */
export declare class MongoConnection extends EventEmitter implements MongoConnectionContract {
    name: string;
    private config;
    private logger;
    /**
     * MongoDB client instance
     */
    client: MongoClient;
    /**
     * MongoDB database instance
     */
    db: Db;
    /**
     * Connection state
     */
    state: 'registered' | 'open' | 'closed';
    private _isReady;
    private _isClosed;
    constructor(name: string, config: MongoDBConnectionConfig, logger: any);
    /**
     * Returns a boolean indicating if the connection is ready for making
     * database queries.
     */
    get isReady(): boolean;
    /**
     * Returns a boolean indicating if the connection is closed.
     */
    get isClosed(): boolean;
    /**
     * Get a collection from the database
     */
    collection<T extends Document = Document>(name: string): Collection<T>;
    /**
     * Build the MongoDB connection URI from the config
     */
    private buildConnectionUri;
    /**
     * Connect to the MongoDB server
     */
    connect(): Promise<void>;
    /**
     * Disconnect from the MongoDB server
     */
    disconnect(): Promise<void>;
}