import { AWSStatus } from './aws-iotcore-connector';
declare const enum TrendDirection {
    INCREASING = "INCREASING",
    FLAT = "FLAT",
    DECREASING = "DECREASING"
}
interface MetricsCollectorJSON {
    mean_confidence: number;
    standard_deviation: number;
    confidence_trend: TrendDirection;
    details: {
        n: number;
        sum_confidences: number;
        sum_confidences_squared: number;
    };
    ts: number;
    id: string;
}
/**
 * Internal utility for collecting and analyzing confidence metrics.
 * Calculates running statistics and provides trend analysis.
 */
export declare class MetricsCollector {
    private static readonly NUM_PLACES;
    private count;
    private sumConfidences;
    private sumSquaredConfidences;
    private meanConfidenceTrend;
    getMeanConfidence(): number;
    getStandardDeviation(): number;
    reset(): {
        metrics_reset: AWSStatus;
    };
    addConfidence(confidence: number): void;
    updateConfidenceMetrics(confidences: number[]): void;
    toJSON(): MetricsCollectorJSON;
}
export {};