import { FirebaseApp, FirebaseError } from '@nativescript/firebase-core';
export type EventType = 'value' | 'child_added' | 'child_changed' | 'child_moved' | 'child_removed';
export interface TransactionResult {
    snapshot: IDataSnapshot;
    commited: boolean;
}
export interface IThenableReference extends IReference, PromiseLike<any> {
}
export interface IOnDisconnect {
    cancel(onComplete?: undefined | ((error: FirebaseError | null) => void)): Promise<void>;
    remove(onComplete?: undefined | ((error: FirebaseError | null) => void)): Promise<void>;
    set(value: any, onComplete?: undefined | ((error: FirebaseError | null) => void)): Promise<void>;
    setWithPriority(value: any, priority: string | number | null, onComplete?: undefined | ((error: FirebaseError | null) => void)): Promise<void>;
    update(values: {
        [key: string]: any;
    }, onComplete?: undefined | ((error: FirebaseError | null) => void)): Promise<void>;
}
export interface IQuery {
    ref: IReference;
    endAt(value: number | string | boolean | null, key?: undefined | string): IQuery;
    equalTo(value: number | string | boolean | null, key?: undefined | string): IQuery;
    keepSynced(bool: boolean): any;
    limitToFirst(limit: number): IQuery;
    limitToLast(limit: number): IQuery;
    off(eventType?: EventType, callback?: undefined | ((a: IDataSnapshot, b: string | null) => void), context?: Record<string, any>): void;
    on(eventType: EventType, callback: (data: IDataSnapshot, previousChildKey: string | null) => void, cancelCallbackOrContext?: (a: Error) => void | Record<string, any> | null, context?: Record<string, any> | null): (a: IDataSnapshot | null, b: string | null) => void;
    once(eventType: EventType, successCallback?: undefined | ((a: IDataSnapshot, b: string | null) => any), failureCallbackContext?: (a: Error) => void | Record<string, any> | null): Promise<IDataSnapshot>;
    orderByChild(path: string): IQuery;
    orderByKey(): IQuery;
    orderByPriority(): IQuery;
    orderByValue(): IQuery;
    startAt(value: number | string | boolean | null, key?: undefined | string): IQuery;
    toString(): string;
}
export interface IReference extends IQuery {
    readonly key: string | null;
    readonly parent: IReference | null;
    readonly ref: IReference;
    readonly root: IReference;
    child(path: string): IReference;
    onDisconnect(): IOnDisconnect;
    push(value?: any, onComplete?: undefined | (() => void)): IThenableReference;
    remove(onComplete?: undefined | ((error: FirebaseError | null) => void)): Promise<void>;
    set(value: any, onComplete?: undefined | ((error: FirebaseError | null) => void)): Promise<void>;
    setPriority(priority: string | number | null, onComplete?: undefined | ((error: FirebaseError | null) => void)): Promise<void>;
    setWithPriority(newVal: any, newPriority: string | number | null, onComplete?: undefined | ((error: FirebaseError | null) => void)): Promise<void>;
    transaction(transactionUpdate: (currentData: object) => object | undefined, onComplete?: undefined | ((error: FirebaseError | null, committed: boolean, finalResult: IDataSnapshot) => void), applyLocally?: undefined | false | true): Promise<TransactionResult>;
    update(values: {
        [key: string]: any;
    }, onComplete?: undefined | ((error: FirebaseError | null) => void)): Promise<void>;
}
export interface IDataSnapshot {
    key?: string;
    ref: IReference;
    child(path: string): IDataSnapshot;
    exists(): boolean;
    exportVal(): any;
    forEach(action: (child: IDataSnapshot) => true | undefined): boolean;
    getPriority(): string | number | null;
    hasChild(path: string): boolean;
    hasChildren(): boolean;
    numChildren(): number;
    val(): any;
}
export interface IDatabase {
    readonly app: FirebaseApp;
    persistenceCacheSizeBytes: number;
    persistenceEnabled: boolean;
    useEmulator(host: string, port: number): any;
    setLoggingEnabled(enabled: boolean): any;
    goOffline(): any;
    goOnline(): any;
    ref(path?: undefined | string): IReference;
    refFromURL(url: string): IReference;
}