/*
 * 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.optimizer.plan;

import org.apache.flink.api.common.operators.GenericDataSourceBase;
import org.apache.flink.api.common.operators.OperatorInformation;
import org.apache.flink.api.common.typeinfo.BasicTypeInfo;
import org.apache.flink.optimizer.dag.DataSourceNode;
import org.apache.flink.core.fs.Path;
import org.junit.Assert;
import org.junit.Test;
import org.apache.flink.api.java.io.TextInputFormat;

public class ChannelTest {
	
	@Test
	public void testGetEstimatesNoReplicationFactor() {
		final long NUM_RECORD = 1001;
		final long SIZE = 467131;
		
		DataSourceNode source = getSourceNode();
		SourcePlanNode planNode = new SourcePlanNode(source, "test node");
		Channel channel = new Channel(planNode);

		// no estimates here
		Assert.assertEquals(-1, channel.getEstimatedOutputSize());
		Assert.assertEquals(-1, channel.getEstimatedNumRecords());
		
		// set estimates
		source.setEstimatedNumRecords(NUM_RECORD);
		source.setEstimatedOutputSize(SIZE);
		Assert.assertEquals(SIZE, channel.getEstimatedOutputSize());
		Assert.assertEquals(NUM_RECORD, channel.getEstimatedNumRecords());
	}
	
	@Test
	public void testGetEstimatesWithReplicationFactor() {
		final long NUM_RECORD = 1001;
		final long SIZE = 467131;
		
		final int REPLICATION = 23;
		
		DataSourceNode source = getSourceNode();
		SourcePlanNode planNode = new SourcePlanNode(source, "test node");
		Channel channel = new Channel(planNode);
		channel.setReplicationFactor(REPLICATION);

		// no estimates here
		Assert.assertEquals(-1, channel.getEstimatedOutputSize());
		Assert.assertEquals(-1, channel.getEstimatedNumRecords());
		
		// set estimates
		source.setEstimatedNumRecords(NUM_RECORD);
		source.setEstimatedOutputSize(SIZE);
		Assert.assertEquals(SIZE * REPLICATION, channel.getEstimatedOutputSize());
		Assert.assertEquals(NUM_RECORD * REPLICATION, channel.getEstimatedNumRecords());
	}
	
	
//	private static final OptimizerNode getSingleInputNode() {
//		return new MapNode(new MapOperatorBase<String, String, GenericMap<String,String>>(
//				new IdentityMapper<String>(),
//				new UnaryOperatorInformation<String, String>(BasicTypeInfo.STRING_TYPE_INFO, BasicTypeInfo.STRING_TYPE_INFO),
//				"map"));
//	}
	
	private static final DataSourceNode getSourceNode() {
		return new DataSourceNode(new GenericDataSourceBase<String, TextInputFormat>(
				new TextInputFormat(new Path("/ignored")), 
				new OperatorInformation<String>(BasicTypeInfo.STRING_TYPE_INFO),
				"source"));
	}
}