/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you 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
 *
 *     http://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.apache.flink.fs.s3.common;

import org.apache.flink.configuration.Configuration;
import org.apache.flink.fs.s3.common.writer.S3AccessHelper;
import org.apache.flink.util.TestLogger;

import org.apache.hadoop.fs.FileSystem;
import org.junit.Test;
import org.mockito.Mockito;

import javax.annotation.Nullable;

import java.net.URI;
import java.util.Collections;

import static org.junit.Assert.assertEquals;

/**
 * Tests that the file system factory picks up the entropy configuration properly.
 */
public class S3EntropyFsFactoryTest extends TestLogger {

	@Test
	public void testEntropyInjectionConfig() throws Exception {
		final Configuration conf = new Configuration();
		conf.setString("s3.entropy.key", "__entropy__");
		conf.setInteger("s3.entropy.length", 7);

		TestFsFactory factory = new TestFsFactory();
		factory.configure(conf);

		FlinkS3FileSystem fs = (FlinkS3FileSystem) factory.create(new URI("s3://test"));
		assertEquals("__entropy__", fs.getEntropyInjectionKey());
		assertEquals(7, fs.generateEntropy().length());
	}

	/**
	 * Test validates that the produced by AbstractS3FileSystemFactory object will contains
	 * only first path from multiple paths in config.
	 */
	@Test
	public void testMultipleTempDirsConfig() throws Exception {
		final Configuration conf = new Configuration();
		String dir1 =  "/tmp/dir1";
		String dir2 =  "/tmp/dir2";
		conf.setString("io.tmp.dirs", dir1 + "," + dir2);

		TestFsFactory factory = new TestFsFactory();
		factory.configure(conf);

		FlinkS3FileSystem fs = (FlinkS3FileSystem) factory.create(new URI("s3://test"));
		assertEquals(fs.getLocalTmpDir(), dir1);
	}

	// ------------------------------------------------------------------------

	private static final class TestFsFactory extends AbstractS3FileSystemFactory {

		TestFsFactory() {
			super("testFs", new HadoopConfigLoader(
					new String[0],
					new String[0][],
					"",
					Collections.emptySet(),
					Collections.emptySet(),
					""));
		}

		@Override
		protected org.apache.hadoop.fs.FileSystem createHadoopFileSystem() {
			return Mockito.mock(org.apache.hadoop.fs.FileSystem.class);
		}

		@Override
		protected URI getInitURI(URI fsUri, org.apache.hadoop.conf.Configuration hadoopConfig) {
			return fsUri;
		}

		@Nullable
		@Override
		protected S3AccessHelper getS3AccessHelper(FileSystem fs) {
			return null;
		}

		@Override
		public String getScheme() {
			return "test";
		}
	}
}