import { StreamStatisticsSampling } from "@norskvideo/norsk-api/lib/media_pb";
import { AutoSinkMediaNode, SinkNodeSettings } from "./common";
import { Interval, StreamKey } from "./types";
import { PlainMessage } from "@bufbuild/protobuf";
/**
 * @public
 * Settings to control stream timestamp report
 * see {@link NorskInspect.streamTimestampReport}
 */
export interface StreamTimestampReportSettings extends SinkNodeSettings<StreamTimestampReportNode> {
    onTimestamp?: (streamKey: StreamKey, timestamp: Interval, info: {
        duration?: Interval;
    }) => void;
}
/**
 * @public
 * see: {@link NorskInspect.streamTimestampReport}
 */
export declare class StreamTimestampReportNode extends AutoSinkMediaNode<string> {
}
/**
 * @public
 * Settings to subtitles inspect node
 * see {@link NorskInspect.subtitles}
 */
export interface InspectSubtitlesSettings extends SinkNodeSettings<InspectSubtitlesNode> {
    /**
     * Callback to observe subtitle cues in the subscribed stream.
     *
     * Timestamps are not directly related to cue timings, but Norsk timestamps as per timestamp report.
     *
     * @param cue
     * @returns
     */
    onCue?: (cue: {
        streamKey: StreamKey;
        startTimestamp: Interval;
        endTimestamp: Interval;
        text: string;
    }) => void;
}
/**
 * @public
 * see: {@link NorskInspect.subtitles}
 */
export declare class InspectSubtitlesNode extends AutoSinkMediaNode<string> {
}
/**
 * @public
 * Settings for metrics node
 * see {@link NorskInspect.metrics}
 */
export interface MetricsSettings extends SinkNodeSettings<MetricsNode> {
    name: string;
    includeTimestamps: boolean;
    includeStreams: boolean;
    streamStatistics?: {
        statsSampling?: PlainMessage<StreamStatisticsSampling>;
    };
    labels: {
        [k: string]: string;
    };
}
/**
 * @public
 * see: {@link NorskInspect.subtitles}
 */
export declare class MetricsNode extends AutoSinkMediaNode<string> {
}
/**
 * @public
 * Methods that allow you to inspect media streams, for monitoring, decisioning or debug purposes.
 */
export interface NorskInspect {
    /** Intercept all the timestamps of any subscribed stream
     * @param settings - Configuration for the report node
     */
    streamTimestampReport(settings: StreamTimestampReportSettings): Promise<StreamTimestampReportNode>;
    /**
     * Observe the cues in a subtitle stream.
     *
     * These can be modified and sent to a streamWebVtt input
     * @param settings - Configuration for the report node
     */
    subtitles(settings: InspectSubtitlesSettings): Promise<InspectSubtitlesNode>;
    /**
     * Generate metrics for one or more input streams
     *
     * These will end up in the telemetry store and are exportable via the prometheus endpoint
  
     * or an otel collector
     */
    streamMetrics(settings: MetricsSettings): Promise<MetricsNode>;
}
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