import { ClientSession, Db, MongoClient } from "mongodb";
import { MongoBaseRepository } from "./MongoBaseRepository";
interface MongoBackendConfig {
    mongo: MongoClient;
    app: string;
    session?: ClientSession;
}
export declare class MongoBackend {
    private _client;
    private _app;
    private _dbName;
    protected _session: ClientSession | undefined;
    constructor(config: MongoBackendConfig);
    getRepo<T extends MongoBaseRepository<any>>(RepoClass: new (db: Db, session?: ClientSession) => T): T;
    get db(): Db;
    get client(): MongoClient;
    /**
     * Closes the connection only if a client exists.
     */
    close(): Promise<void>;
    /**
     * Connects the client to the server.
     * In newer MongoDB drivers, this is often optional as it connects on demand,
     * but explicit calling is better for verifying connectivity during init.
     */
    connect(): Promise<void>;
    /**
     * Checks if the client is currently connected to the server.
     */
    isConnected(): Promise<boolean>;
    /**
     * Creates a collection in the database.
     */
    createCollection(name: string): Promise<void>;
    /**
     * Properly checks if a collection exists by name.
     */
    collectionExists(name: string): Promise<boolean>;
    /**
     * Simple insert of one item
     *
     */
    insert(collectionName: string, data: any): Promise<void>;
}
export {};
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