/*******************************************************************************
 * Copyright 2017 Capital One Services, LLC and Bitwise, Inc.
 * 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
 * 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 hydrograph.engine.cascading.assembly;

import cascading.pipe.Pipe;
import cascading.tuple.Fields;
import cascading.tuple.Tuple;
import com.hotels.plunger.Bucket;
import com.hotels.plunger.Data;
import com.hotels.plunger.DataBuilder;
import com.hotels.plunger.Plunger;
import hydrograph.engine.cascading.assembly.SortAssembly;
import hydrograph.engine.cascading.assembly.infra.ComponentParameters;
import hydrograph.engine.core.component.entity.SortEntity;
import hydrograph.engine.core.component.entity.elements.KeyField;
import hydrograph.engine.core.component.entity.elements.OutSocket;
import junit.framework.Assert;
import org.junit.After;
import org.junit.Before;
import org.junit.Test;

import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
import java.util.Properties;

import static org.hamcrest.CoreMatchers.is;
import static org.junit.Assert.assertThat;

/**
 * This test class contain just a simple test as Sort component is on lower priority.
 * This unit test just aims to test if the assembly works without any issues
 * It is discouraged to use sort component on hadoop
 * @author Prabodh
 *
 */
@SuppressWarnings("deprecation")
public class SortAssemblyTest {

	@Before
	public void setup() {
		// TODO: add setup related code here
	}

	/**
	 * Test simple sort operation
	 */
	@Test
	public void TestSimpleSortOperation() throws IOException {
		Plunger plunger = new Plunger();

		Data file1 = new DataBuilder(new Fields("col1", "col2", "col3"))
				.addTuple("C1R1", "C2R1", 100)
				.addTuple("C1R1", "C2R2", 100)
				.addTuple("C1R1", "C2R3", 100)
				.addTuple("C1R1", "C2R4", 100)
				.addTuple("C1R1", "C2R5", 100)
				.addTuple("C1R1", "C2R6", 100)
				.addTuple("C1R1", "C2R7", 100)
				.addTuple("C1R1", "C2R8", 100)
				.addTuple("C1R1", "C2R9", 100).build();

		// pipe corresponding to an input of scan component
		Pipe pipe1 = plunger.newNamedPipe("pipe1", file1);

		ComponentParameters parameters = new ComponentParameters();
		parameters.addInputPipe(pipe1);
		parameters.addInputFields(new Fields("col1", "col2", "col3"));

		SortEntity sortEntity = new SortEntity();

		sortEntity.setComponentId("sortTest");

		OutSocket outSocket1 = new OutSocket("out0");
		List<OutSocket> outSocketList = new ArrayList<>();
		outSocketList.add(outSocket1);
		sortEntity.setOutSocketList(outSocketList);

		KeyField[] keyFields = new KeyField[1];
		keyFields[0] = new KeyField();
		keyFields[0].setName("col1");
		sortEntity.setKeyFields(keyFields);

		KeyField[] secondaryKeyFields = new KeyField[1];
		secondaryKeyFields[0] = new KeyField();
		secondaryKeyFields[0].setName("col2");
		secondaryKeyFields[0].setSortOrder("desc");
		sortEntity.setSecondaryKeyFields(secondaryKeyFields);

		Properties runtimeProperties = new Properties();
		sortEntity.setRuntimeProperties(runtimeProperties);

		SortAssembly sort = new SortAssembly(sortEntity, parameters);

		// create bucket for the scan sub assembly
		Bucket bucket = plunger.newBucket(new Fields("col1", "col2", "col3"),
				sort);
		List<Tuple> actual = bucket.result().asTupleList(); // get results from
															// bucket

		// assert the actual results with expected results
		assertThat(actual.size(), is(9));

		
		Assert.assertEquals(new Tuple("C1R1", "C2R9", 100), actual.get(0));
	}

	@After
	public void cleanup() {
		// TODO: add cleanup related code here
	}

}