import { HoistService, InitContext, PageState, PlainObject } from '@xh/hoist/core';
import { WebSocketTelemetry } from '@xh/hoist/svc/WebSocketService';
/**
 * Service for gathering data about the current state and health of the client app, for submission
 * to the server or review on the console during interactive troubleshooting.
 *
 * Hoist sends this data once on application load and can be configured to send at regular intervals
 * throughout a user's session via the `xhActivityTracking.clientHealthReport` app config. Reports
 * are submitted via activity tracking for review within the Admin Console.
 */
export declare class ClientHealthService extends HoistService {
    static instance: ClientHealthService;
    private sources;
    initAsync(ctx: InitContext): Promise<void>;
    get enabled(): boolean;
    /** @returns a customizable report with metrics capturing client app/session state. */
    getReport(): ClientHealthReport;
    /** @returns a report, formatted for easier viewing in console. */
    getFormattedReport(): PlainObject;
    /**
     * Register a new source for app-specific data to be sent with each report.
     * @param key - key under which to report the data - can be used to remove this source later.
     * @param callback - function returning serializable to include with each report.
     */
    addSource(key: string, callback: () => any): void;
    /** Unregister a previously-enabled source for client health report data. */
    removeSource(key: string): void;
    /**
     * Generate and submit a report to the server, via TrackService.
     *
     * For ad-hoc troubleshooting. Apps may also configure this service to
     * submit on regular intervals.
     */
    sendReportAsync(): Promise<void>;
    getGeneral(): GeneralData;
    getConnection(): ConnectionData;
    getMemory(): MemoryData;
    getCustom(): PlainObject;
    private sendReportInternal;
}
export interface GeneralData {
    startTime: number;
    durationMins: number;
    idleMins: number;
    pageState: PageState;
}
export interface ConnectionData {
    downlink: number;
    effectiveType: string;
    rtt: number;
}
export interface MemoryData {
    modelCount: number;
    usedPctLimit?: number;
    jsHeapSizeLimit?: number;
    totalJSHeapSize?: number;
    usedJSHeapSize?: number;
}
export interface ClientHealthReport {
    general: GeneralData;
    connection: ConnectionData;
    memory: MemoryData;
    webSockets: WebSocketTelemetry;
}