import { Subject } from 'rxjs';
import { IConnectionActivity } from './communicator';
import { IStatusChange } from './sentinel/status';
/**
 * A service call result event. These will be logged by fetchData(...) calls
 *
 * @export
 * @interface IServiceActivity
 */
export interface IServiceActivity {
    start_ts: number;
    end_ts: number;
    request: {
        url: string;
        headers: {
            [key: string]: string;
        };
        data: any;
    };
    status: number;
    response?: Response;
}
/**
 * A generic application event to add to the log.
 * Could be wired to route changes or certain components activating or sharing
 * some result
 *
 * @export
 * @interface IApplicationActivity
 */
export interface IApplicationActivity {
    url: string;
    component: string;
    description?: string;
    status: 'ok' | 'activate' | 'deactivate' | 'error' | 'warning';
    data?: any;
}
/**
 * An event log entry. Could be one of various types:
 *
 * - service call
 * - communicator (signalr) activity
 * - application
 *
 * @export
 * @interface EventLog
 */
export interface EventLog {
    event_type: 'service' | 'communicator' | 'sentinel-status' | 'application';
    data: IServiceActivity | IConnectionActivity | IStatusChange | IApplicationActivity;
}
/**
 * This collector and emitter can help applications with creating a local log
 * of actions happening in the SDK. It could also prove valuable for analytics.
 * The NetworkHealthMonitor uses these events for monitoring purposes
 *
 * @export
 * @class EventLogger
 */
export declare class EventLogger {
    /**
     * The activity log stream
     *
     * @type {Subject<EventLog>}
     */
    changes$: Subject<EventLog>;
    /**
     * This method will emit a service activity event.
     * Will be called by core.fetch but is exposed for other fetch sources
     *
     * @param {IServiceActivity} event
     */
    addServiceEvent(event: IServiceActivity): void;
    /**
     * This method will emit an application activity event.
     * Can be used by the application using the SDK to log an event
     *
     * @param {IApplicationActivity} event
     */
    addApplicationEvent(event: IApplicationActivity): void;
    constructor();
}
export declare const eventLogger: EventLogger;