import { Observable } from 'rxjs';
import * as firebase from 'firebase/app';
import { AngularFirestore, AngularFirestoreCollection, AngularFirestoreDocument } from "@angular/fire/firestore";
import FieldValue = firebase.firestore.FieldValue;
export declare type CollectionPredicate<T> = string | AngularFirestoreCollection<T>;
export declare type DocPredicate<T> = string | AngularFirestoreDocument<T>;
export declare type WithId<T> = T & {
    id: string;
    updatedAt?: FieldValue;
    createdAt?: FieldValue;
};
export declare class FirestoreService {
    private afs;
    constructor(afs: AngularFirestore);
    col<T>(ref: CollectionPredicate<T>, queryFn?: any): AngularFirestoreCollection<T>;
    doc<T>(ref: DocPredicate<T>): AngularFirestoreDocument<T>;
    doc$<T>(ref: DocPredicate<T>): Observable<WithId<T>>;
    col$<T>(ref: CollectionPredicate<T>, queryFn?: any): Observable<T[]>;
    colWithIds$<T>(ref: CollectionPredicate<T>, queryFn?: any): Observable<WithId<T>[]>;
    get timestamp(): FieldValue;
    set$<T>(ref: DocPredicate<T>, data: WithId<T>, merge?: boolean): Observable<WithId<T>>;
    set<T>(ref: DocPredicate<T>, data: any): Promise<void>;
    update<T>(ref: DocPredicate<T>, data: any): Promise<void>;
    delete$<T>(ref: DocPredicate<T>): Observable<string>;
    delete<T>(ref: DocPredicate<T>): Promise<void>;
    add<T>(ref: CollectionPredicate<T>, data: any): Promise<WithId<T>>;
    add$<T>(ref: CollectionPredicate<T>, data: any): Observable<WithId<T>>;
    geopoint(lat: number, lng: number): firebase.firestore.GeoPoint;
    upsert<T>(ref: DocPredicate<T>, data: any): Promise<void>;
    inspectDoc(ref: DocPredicate<any>): void;
    inspectCol(ref: CollectionPredicate<any>): void;
    connect(host: DocPredicate<any>, key: string, doc: DocPredicate<any>): Promise<void>;
    docWithRefs$<T>(ref: DocPredicate<T>): Observable<T>;
    atomic(): Promise<void>;
    /**
     * Delete a collection, in batches of batchSize. Note that this does
     * not recursively delete subcollections of documents in the collection
     * from: https://github.com/AngularFirebase/80-delete-firestore-collections/blob/master/src/app/firestore.service.ts
     */
    deleteCollection(path: string, batchSize: number): Observable<any>;
    private deleteBatch;
}