/*
 * Copyright 2020-2020 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.cloud.stream.app.test.integration;

import java.io.File;
import java.io.IOException;
import java.net.InetAddress;
import java.net.UnknownHostException;

import org.springframework.core.io.ClassPathResource;
import org.springframework.util.SocketUtils;

/**
 * Support utility for stream application integration testing .
 * @author David Turanski
 */
public abstract class StreamAppContainerTestUtils {

	/**
	 * Default docker repository.
	 */
	public static final String SPRINGCLOUDSTREAM_REPOSITOTRY = "springcloudstream";

	public static final String imageName(String appName, String version) {
		return imageName(SPRINGCLOUDSTREAM_REPOSITOTRY, appName, version);
	}

	public static final String imageName(String repository, String appName, String version) {
		return repository + "/" + appName + ":" + version;
	}

	public static final String localHostAddress() {
		try {
			return InetAddress.getLocalHost().getHostAddress();
		}
		catch (UnknownHostException e) {
			throw new IllegalStateException(e.getMessage(), e);
		}
	}

	public static final File resourceAsFile(String path) {
		try {
			return new ClassPathResource(path).getFile();
		}
		catch (IOException e) {
			throw new IllegalStateException("Unable to access resource " + path);
		}
	}

	public static final int findAvailablePort() {
		return SocketUtils.findAvailableTcpPort(10000, 20000);
	}
}
