import { Controller } from './controller';
import { Debuggee } from '../debuggee';
import * as stackdriver from '../types/stackdriver';
import * as firebase from 'firebase-admin';
export declare class FirebaseController implements Controller {
    db: firebase.database.Database;
    debuggeeId?: string;
    bpRef?: firebase.database.Reference;
    markActiveInterval: ReturnType<typeof setInterval> | undefined;
    markActivePeriodMsec: number;
    /**
     * Connects to the Firebase database.
     *
     * The project Id passed in options is preferred over any other sources.
     *
     * @param options specifies which database and credentials to use
     * @returns database connection
     */
    static initialize(options: {
        keyPath?: string;
        databaseUrl?: string;
        projectId?: string;
    }): Promise<firebase.database.Database>;
    /**
     * @constructor
     */
    constructor(db: firebase.database.Database);
    getProjectId(): string;
    /**
     * Register to the API (implementation).
     *
     * Writes an initial record to the database if it is not yet present.
     * Otherwise only updates the last active timestamp.
     *
     * @param {!function(?Error,Object=)} callback
     * @private
     */
    register(debuggee: Debuggee, callback: (err: Error | null, result?: {
        debuggee: Debuggee;
        agentId: string;
    }) => void): void;
    /**
     * Update the server about breakpoint state
     * @param {!Debuggee} debuggee
     * @param {!Breakpoint} breakpoint
     * @param {!Function} callback accepting (err, body)
     */
    updateBreakpoint(debuggee: Debuggee, breakpoint: stackdriver.Breakpoint, callback: (err?: Error, body?: {}) => void): Promise<void>;
    subscribeToBreakpoints(debuggee: Debuggee, callback: (err: Error | null, breakpoints: stackdriver.Breakpoint[]) => void): void;
    startMarkingDebuggeeActive(): void;
    /**
     * Marks a debuggee as active by prompting the server to update the
     * lastUpdateTimeUnixMsec to server time.
     */
    markDebuggeeActive(): Promise<void>;
    stop(): void;
}