import { Knex } from 'knex';
import { Table } from 'knex-schema-inspector/dist/types/table';
import { MongoClient } from 'mongodb';
interface IDBaseConfig {
    dbClient: 'sqlite3' | 'oracledb' | 'cockroachdb' | 'pg' | 'mysql' | 'mariadb' | 'mssql' | 'mongodb';
    dbHost?: string;
    dbPort?: number;
    dbDatabase?: string;
    dbUser?: string;
    dbPassword?: string;
    dbConnectionString?: string;
}
interface IDBaseList {
    name: string;
    schema?: string;
}
interface ITableInfo extends Table {
    primaryKey?: string | null;
}
export declare class DatabaseService {
    config: IDBaseConfig | null;
    knexConfig: Knex.Config | null;
    database: Knex | MongoClient;
    constructor(options: {
        config: IDBaseConfig;
    });
    testConnection(): Promise<boolean>;
    getDatabases(): Promise<IDBaseList[]>;
    getTables(database?: string): Promise<{
        name: string;
    }[]>;
    getTablesInfo(database?: string): Promise<(import("mongodb").CollectionInfo | Pick<import("mongodb").CollectionInfo, "name" | "type">)[] | ITableInfo[]>;
    getColumns(tableName: string): Promise<{
        name: string;
    }[]>;
    getColumnsInfo(tableName: string): Promise<{
        name: string;
    }[]>;
    getForeignKeys(tableName?: string): Promise<import("knex-schema-inspector/dist/types/foreign-key").ForeignKey[]>;
    destroy(): Promise<boolean>;
}
export {};