/*!
 * Copyright (c) Microsoft Corporation and contributors. All rights reserved.
 * Licensed under the MIT License.
 */

import type { TelemetryLoggerExt } from "./telemetryTypes.js";

/**
 * Utility counter which will send event only if the provided value is above a configured threshold.
 *
 * @internal
 */
export class ThresholdCounter {
	public constructor(
		private readonly threshold: number,
		private readonly logger: TelemetryLoggerExt,
		private thresholdMultiple = threshold,
	) {}

	/**
	 * Sends the value if it's above the treshold.
	 */
	public send(eventName: string, value: number): void {
		if (value < this.threshold) {
			return;
		}
		this.logger.sendPerformanceEvent({
			eventName,
			value,
		});
	}

	/**
	 * Sends the value if it's above the threshold
	 * and a multiple of the threshold.
	 *
	 * To be used in scenarios where we'd like to record a
	 * threshold violation while reducing telemetry noise.
	 */
	public sendIfMultiple(eventName: string, value: number): void {
		if (value === this.thresholdMultiple) {
			this.logger.sendPerformanceEvent({
				eventName,
				value,
			});
			// reduce number of "multiple" events.
			this.thresholdMultiple = this.thresholdMultiple * 2;
		}
	}
}