/*
 * 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.api.common.operators;

import org.apache.flink.api.common.ExecutionConfig;
import org.apache.flink.api.common.TaskInfo;
import org.apache.flink.api.common.accumulators.Accumulator;
import org.apache.flink.api.common.functions.util.RuntimeUDFContext;
import org.apache.flink.api.common.operators.util.TestIOData;
import org.apache.flink.api.common.operators.util.TestNonRichOutputFormat;
import org.apache.flink.api.common.operators.util.TestNonRichInputFormat;
import org.apache.flink.api.common.operators.util.TestRichOutputFormat;
import org.apache.flink.api.common.typeinfo.BasicTypeInfo;
import org.apache.flink.core.fs.Path;
import org.apache.flink.metrics.groups.UnregisteredMetricsGroup;
import org.apache.flink.types.Nothing;

import org.junit.Test;

import java.util.HashMap;
import java.util.concurrent.Future;

import static java.util.Arrays.asList;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.fail;

/**
 * Checks the GenericDataSinkBase operator for both Rich and non-Rich output formats.
 */
@SuppressWarnings("serial")
public class GenericDataSinkBaseTest implements java.io.Serializable {

	private static TestNonRichInputFormat in = new TestNonRichInputFormat();
	GenericDataSourceBase<String, TestNonRichInputFormat> source =
			new GenericDataSourceBase<String, TestNonRichInputFormat>(
					in, new OperatorInformation<String>(BasicTypeInfo.STRING_TYPE_INFO), "testSource");


	@Test
	public void testDataSourcePlain() {
		try {
			TestNonRichOutputFormat out = new TestNonRichOutputFormat();
			GenericDataSinkBase<String> sink = new GenericDataSinkBase<String>(
					out,
					new UnaryOperatorInformation<String, Nothing>(BasicTypeInfo.STRING_TYPE_INFO, BasicTypeInfo.getInfoFor(Nothing.class)),
					"test_sink");
			sink.setInput(source);

			ExecutionConfig executionConfig = new ExecutionConfig();
			executionConfig.disableObjectReuse();
			in.reset();
			sink.executeOnCollections(asList(TestIOData.NAMES), null, executionConfig);
			assertEquals(out.output, asList(TestIOData.NAMES));

			executionConfig.enableObjectReuse();
			out.clear();
			in.reset();
			sink.executeOnCollections(asList(TestIOData.NAMES), null, executionConfig);
			assertEquals(out.output, asList(TestIOData.NAMES));
		}
		catch (Exception e) {
			e.printStackTrace();
			fail(e.getMessage());
		}
	}

	@Test
	public void testDataSourceWithRuntimeContext() {
		try {
			TestRichOutputFormat out = new TestRichOutputFormat();
			GenericDataSinkBase<String> sink = new GenericDataSinkBase<String>(
					out,
					new UnaryOperatorInformation<String, Nothing>(BasicTypeInfo.STRING_TYPE_INFO, BasicTypeInfo.getInfoFor(Nothing.class)),
					"test_sink");
			sink.setInput(source);

			ExecutionConfig executionConfig = new ExecutionConfig();
			final HashMap<String, Accumulator<?, ?>> accumulatorMap = new HashMap<String, Accumulator<?, ?>>();
			final HashMap<String, Future<Path>> cpTasks = new HashMap<>();
			final TaskInfo taskInfo = new TaskInfo("test_sink", 1, 0, 1, 0);
			executionConfig.disableObjectReuse();
			in.reset();
			
			sink.executeOnCollections(asList(TestIOData.NAMES), new RuntimeUDFContext(
					taskInfo, null, executionConfig, cpTasks, accumulatorMap, new UnregisteredMetricsGroup()),
					executionConfig);
		
				assertEquals(out.output, asList(TestIOData.RICH_NAMES));

			executionConfig.enableObjectReuse();
			out.clear();
			in.reset();
			
			sink.executeOnCollections(asList(TestIOData.NAMES), new RuntimeUDFContext(
					taskInfo, null, executionConfig, cpTasks, accumulatorMap, new UnregisteredMetricsGroup()),
					executionConfig);
			assertEquals(out.output, asList(TestIOData.RICH_NAMES));
		} catch(Exception e){
			e.printStackTrace();
			fail(e.getMessage());
		}
	}
}