/**
 * Firebase
 * @author Ebube Ud <kripsonud@gmail.com>
 */
import { WhereFilterOp, OrderByDirection } from 'firebase/firestore';
export default class Firebase {
    db: any;
    static firebaseConfig: {
        apiKey: string;
        authDomain: string;
        projectId: string;
        storageBucket: string;
        messagingSenderId: string;
        appId: string;
        measurementId: string;
    };
    constructor();
    initializeFirebaseDatabase: () => any;
    /**
     *
     * @param ref The path reference of the collection document to write
     * @param data The data object to write
     * @returns Response status object
     */
    addData: (ref: string, data: any) => Promise<any>;
    /**
     *
     * @param ref The path reference of the collection document to read
     * @returns Retrieved object of data or a message response
     */
    getData: (ref: string) => Promise<any>;
    /**
     *
     * @param ref The path reference of the collection document to write
     * @param data The data object to write
     * @returns Response status object
     */
    updateData: (ref: string, data: any) => Promise<any>;
    /**
     *
     * @param ref The path reference of the collection document to write
     * @returns Response status object
     */
    deleteData: (ref: string) => Promise<any>;
    /**
     *
     * @param ref The path reference of the collection or sub-collections to read
     * @returns Retrieves object of data in arrary or a message response
     */
    getCollections: (ref: string) => Promise<any | any[]>;
    /**
     *
     * @param ref - The path reference of the collection or sub-collections to read
     * @param options - The args for the query which comprises of the conditions, the ordering and the limit
     * @returns Retrieves object of data in arrary or a message response
     */
    queryCollection: (ref: string, options: {
        conditions?: {
            field: string;
            operator: WhereFilterOp;
            value: unknown;
        }[];
        order?: {
            field: string;
            direction?: OrderByDirection;
        };
        limitCount?: number;
    }) => Promise<any | any[]>;
}