import { EventEmitter } from 'events';
import admin from 'firebase-admin';
import { TelegramNotifier } from './telegramNotifier';
import { Notifiable } from '../types/common';
import { FirebaseStrategySettingsValues, FormatSettingMessageArgs, SettingChange } from '../types/firebase';
export interface FirebaseServiceBaseArgs<T> {
    documentPath: string;
    defaultData: T;
    telegramNotifier: TelegramNotifier;
}
export declare class FirebaseServiceBase<T> extends EventEmitter implements Notifiable {
    private firestore;
    private documentReference;
    private settingsListener;
    private currentData;
    private defaultData;
    onNotify: Notifiable['onNotify'];
    onError: Notifiable['onError'];
    constructor(args: FirebaseServiceBaseArgs<T>);
    initialize(): Promise<void>;
    private subscribeToDataChanges;
    private updateCurrentData;
    getData(): T;
    updateData(data: Partial<T>): Promise<void>;
    getDocumentReference(): admin.firestore.DocumentReference;
    getFirestore(): admin.firestore.Firestore;
    getChangedSettings(current: T, previous: T): SettingChange<T[keyof T]>[];
    protected getAddedAndRemovedItemsMessage<Item>(current: Item[], previous: Item[]): string;
    private getConfigByKey;
    protected formatSettingMessage<V extends FirebaseStrategySettingsValues>(args: FormatSettingMessageArgs<V>): string;
    disconnect(): Promise<void>;
}
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