import { SerializedRealTimeQuery } from '@forest-fire/serialized-query';
import type { IRtdbDataSnapshot, SnapshotFrom, ISdk } from '@forest-fire/types';
import { EventFrom, IRtdbSdk } from '@forest-fire/types';
/**
 * Captures a CRUD event
 */
export interface IMockWatcherGroupEvent<TSdk extends ISdk> {
    /** the unique identifier of the listener */
    listenerId: string;
    /** the path that the listener is listening at */
    listenerPath: string;
    /** the event which is being listened to */
    listenerEvent: EventFrom<TSdk>;
    /** the dispatch function for this listener */
    callback: IFirebaseEventHandler<TSdk>;
    /** the path where the event took place */
    eventPaths: string[];
    /** the "key" of the event; this applied to value AND child events */
    key: string;
    /** changes between value and priorValue */
    changes: unknown;
    /** the new value which has been set */
    value: unknown;
    /** the prior value that this property held previous to the event */
    priorValue: unknown;
}
/**
 * A change event which is fired from Firebase; the specific signature
 * of the event depends on the event type being fired.
 *
 * events: [API Spec](https://firebase.google.com/docs/reference/node/firebase.database.Reference#on)
 *
 * @param snap the DBRtdbDataSnapshot which provides access to the root of the `on` event;
 * in the case of a _removal_ you will get snapshot of the prior value
 * @param prevChildKey provided on `child_changed`, `child_moved`, and `child_added`; gives the
 * name of the key which directly _preceeds_ the event key in Firebase's stored order
 */
export interface IFirebaseEventHandler<TSdk extends ISdk> {
    (snap: SnapshotFrom<TSdk>, prevChildKey?: string): void;
}
export declare type EventHandler = HandleValueEvent | HandleNewEvent | HandleRemoveEvent;
export declare type GenericEventHandler = (snap: IRtdbDataSnapshot, key?: string) => void;
export declare type HandleValueEvent = (dataSnapShot: IRtdbDataSnapshot) => void;
export declare type HandleNewEvent = (childSnapshot: IRtdbDataSnapshot, prevChildKey: string) => void;
export declare type HandleRemoveEvent = (oldChildSnapshot: IRtdbDataSnapshot) => void;
export declare type HandleMoveEvent = (childSnapshot: IRtdbDataSnapshot, prevChildKey: string) => void;
export declare type HandleChangeEvent = (childSnapshot: IRtdbDataSnapshot, prevChildKey: string) => void;
export interface IListener<TSdk extends IRtdbSdk> {
    /** random string */
    id: string;
    /** the _query_ the listener is based off of */
    query: SerializedRealTimeQuery<TSdk>;
    eventType: EventFrom<TSdk>;
    callback: (a: SnapshotFrom<TSdk> | null, b?: string) => any;
    cancelCallbackOrContext?: Record<string, unknown> | null;
    context?: Record<string, unknown> | null;
}