/*
 * Copyright (C) 2022 NotEnoughUpdates contributors
 *
 * This file is part of NotEnoughUpdates.
 *
 * NotEnoughUpdates is free software: you can redistribute it
 * and/or modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation, either
 * version 3 of the License, or (at your option) any later version.
 *
 * NotEnoughUpdates is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with NotEnoughUpdates. If not, see <https://www.gnu.org/licenses/>.
 */

package io.github.moulberry.notenoughupdates.util;

import org.apache.commons.io.IOUtils;

import java.io.File;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.net.URL;
import java.nio.file.Files;
import java.util.concurrent.CompletableFuture;
import java.util.concurrent.CompletionException;

public class NetUtils {

	public static CompletableFuture<File> downloadAsync(URL httpURL, File outputFile) {
		return CompletableFuture.supplyAsync(() -> {
			try {
				try (
					InputStream from = httpURL.openStream();
					OutputStream to = Files.newOutputStream(outputFile.toPath());
				) {
					IOUtils.copyLarge(from, to);
				}
				return outputFile;
			} catch (IOException e) {
				throw new CompletionException(e);
			}
		});
	}

}