/*
 * Copyright 2021 - 2023 the original author or authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      https://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.springframework.rewrite.utils;

import org.springframework.core.io.Resource;

import java.io.IOException;
import java.io.InputStream;
import java.nio.file.Files;
import java.nio.file.Path;
import java.util.List;

/**
 * Utility class for {@link Resource}s.
 *
 * @author fkrueger
 */
public class ResourceUtil {

	public ResourceUtil() {
	}

	public static Path getPath(Resource resource) {
		try {
			return resource.getFile().toPath();
		}
		catch (IOException var2) {
			throw new RuntimeException(var2);
		}
	}

	public static InputStream getInputStream(Resource resource) {
		try {
			return resource.getInputStream();
		}
		catch (IOException var2) {
			throw new RuntimeException(var2);
		}
	}

	public static void write(Path basePath, List<Resource> resources) {
		try {
			Files.createDirectories(basePath);
			resources.stream().forEach(r -> ResourceUtil.persistResource(basePath, r));
		}
		catch (IOException e) {
			throw new RuntimeException(e);
		}
	}

	private static void persistResource(Path basePath, Resource r) {
		Path resourcePath = ResourceUtil.getPath(r);
		if (resourcePath.isAbsolute()) {
			Path relativize = resourcePath.relativize(basePath);
		}
		else {
			resourcePath = basePath.resolve(resourcePath).toAbsolutePath().normalize();
		}
		if (resourcePath.toFile().exists()) {
			return;
		}
		try {
			if (!resourcePath.getParent().toFile().exists()) {
				Files.createDirectories(resourcePath.getParent());
			}
			Files.writeString(resourcePath, ResourceUtil.getContent(r));
		}
		catch (IOException e) {
			throw new RuntimeException(e);
		}
	}

	public static String getContent(Resource r) {
		try {
			return new String(getInputStream(r).readAllBytes());
		}
		catch (IOException e) {
			throw new RuntimeException(e);
		}
	}

	public static long contentLength(Resource resource) {
		try {
			return resource.contentLength();
		}
		catch (IOException e) {
			throw new RuntimeException(e);
		}
	}

}
