/// <reference types="node" />
import { MongoClient } from 'mongodb';
export declare function setDemoMode(mode: boolean): void;
declare type Strategy = "raw" | "aggregate";
declare const ALL_AGGREGATION_TYPES: readonly ["year", "month", "week", "day", "hour", "minute", "none"];
declare type AggregationType = (typeof ALL_AGGREGATION_TYPES)[number];
export declare abstract class persistence {
    id: string;
    ttl: number;
    strategy: Strategy;
    keep: number;
    cleanJob: NodeJS.Timeout;
    constructor(id: string, ttl?: number, strategy?: Strategy, keep?: number);
    insert(record: {
        date: Date;
        state: any;
    }, callback: (err: Error, doc: Object) => void): void;
    getHistory(aggregate: AggregationType, from: Date, to: Date, callback: (err: Error, results: any[]) => void): void;
    restoreStateFromDB(callback: (err: Error, result: {
        id: string;
        state: string | Date;
        date: Date;
    }) => void): void;
    backupStateToDB(state: string | Date, callback: (err: Error) => void): void;
    cleanOldData(callback: (err: Error) => void): void;
    abstract doInsert(record: {
        date: Date;
        state: any;
    }, callback: (err: Error, doc: Object) => void): void;
    abstract doGetHistory(aggregate: AggregationType, from: Date, to: Date, callback: (err: Error, results: any[]) => void): void;
    abstract doRestoreStateFromDB(callback: (err: Error, result: {
        id: string;
        state: string | Date;
        date: Date;
    }) => void): void;
    abstract doBackupStateToDB(state: string | Date, callback: (err: Error) => void): void;
    abstract doCleanOldData(callback: (err: Error) => void): void;
    release(): void;
}
export declare class mongoDB extends persistence {
    static mongoClient: MongoClient;
    static connecting: boolean;
    constructor(id: string, ttl?: number, strategy?: Strategy, keep?: number);
    private getMongoClient;
    doInsert(record: {
        date: Date;
        state: any;
    }, callback: (err: Error, doc: Object) => void): void;
    doRestoreStateFromDB(callback: (err: Error, result: {
        id: string;
        state: string | Date;
        date: Date;
    }) => void): void;
    doBackupStateToDB(state: string | Date, callback: (err: Error) => void): void;
    doGetHistory(aggregate: AggregationType, from: Date, to: Date, callback: (err: Error, results: any[]) => void): void;
    doCleanOldData(callback: (err: Error) => void): void;
    devRebuildData(target: AggregationType, from: AggregationType, callback: (err: Error) => void): void;
    getHistory2(aggregate: AggregationType, from: Date, to: Date, callback: (err: Error, results: any[]) => void): void;
    release(): void;
}
export {};