/***********************************************************************************************************************
 *
 * Copyright (C) 2010 by the Stratosphere project (http://stratosphere.eu)
 *
 * 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 eu.stratosphere.pact.test.iterative;

import java.io.BufferedReader;
import java.util.Collection;

import org.junit.runner.RunWith;
import org.junit.runners.Parameterized;
import org.junit.runners.Parameterized.Parameters;

import eu.stratosphere.nephele.configuration.Configuration;
import eu.stratosphere.pact.common.plan.Plan;
import eu.stratosphere.pact.example.connectedcomponents.WorksetConnectedComponentsWithCoGroup;
import eu.stratosphere.pact.test.iterative.nephele.ConnectedComponentsNepheleITCase;
import eu.stratosphere.pact.test.util.TestBase2;

@RunWith(Parameterized.class)
public class CoGroupConnectedComponentsITCase extends TestBase2 {
	
	private static final long SEED = 0xBADC0FFEEBEEFL;
	
	private static final int NUM_VERTICES = 1000;
	
	private static final int NUM_EDGES = 10000;

	
	protected String verticesPath;
	protected String edgesPath;
	protected String resultPath;
	
	
	public CoGroupConnectedComponentsITCase(Configuration config) {
		super(config);
	}
	
	@Override
	protected void preSubmit() throws Exception {
		verticesPath = createTempFile("vertices.txt", ConnectedComponentsNepheleITCase.getEnumeratingVertices(NUM_VERTICES));
		edgesPath = createTempFile("edges.txt", ConnectedComponentsNepheleITCase.getRandomOddEvenEdges(NUM_EDGES, NUM_VERTICES, SEED));
		resultPath = getTempFilePath("results");
	}
	
	@Override
	protected Plan getPactPlan() {
		int dop = config.getInteger("ConnectedComponents#NumSubtasks", 1);
		int maxIterations = config.getInteger("ConnectedComponents#NumIterations", 1);
		String[] params = { String.valueOf(dop) , verticesPath, edgesPath, resultPath, String.valueOf(maxIterations) };
		
		WorksetConnectedComponentsWithCoGroup cc = new WorksetConnectedComponentsWithCoGroup();
		return cc.getPlan(params);
	}

	@Override
	protected void postSubmit() throws Exception {
		for (BufferedReader reader : getResultReader(resultPath)) {
			ConnectedComponentsNepheleITCase.checkOddEvenResult(reader);
		}
	}

	@Parameters
	public static Collection<Object[]> getConfigurations() {
		Configuration config1 = new Configuration();
		config1.setInteger("ConnectedComponents#NumSubtasks", 4);
		config1.setInteger("ConnectedComponents#NumIterations", 100);
		return toParameterList(config1);
	}
}
