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/*******************************************************************************
 *   © 2019-2024 SAP SE or an SAP affiliate company. All rights reserved.
 ******************************************************************************/

package com.sap.cloud.mt.tools;

import java.time.Duration;
import java.util.function.Supplier;

public class Wait {
	private final Duration maximumTime;
	private final Duration waitTime;

	private Wait(Duration maximumTime, Duration waitTime) {
		this.maximumTime = maximumTime;
		this.waitTime = waitTime;
	}

	public static WaitBuilder createBuilder() {
		return WaitBuilder.create();
	}

	public void waitUntil(Supplier until) {
		long startTime = System.currentTimeMillis();
		if (until.get()) {
			return;
		}
		do {
			try {
				Thread.sleep(waitTime.toMillis());
			} catch (InterruptedException e) {
				Thread.currentThread().interrupt();
			}
		} while (!until.get() && System.currentTimeMillis() - startTime <= maximumTime.toMillis());
	}

	public static final class WaitBuilder {
		private Duration maximumTime;
		private Duration waitTime;

		private WaitBuilder() {
		}

		private static WaitBuilder create() {
			return new WaitBuilder();
		}

		public WaitBuilder maximumTime(Duration maximumTime) {
			this.maximumTime = maximumTime;
			return this;
		}

		public WaitBuilder waitTime(Duration waitTime) {
			this.waitTime = waitTime;
			return this;
		}

		public Wait build() {
			return new Wait(maximumTime, waitTime);
		}
	}
}