/***********************************************************************************************************************
 *
 * Copyright (C) 2010-2013 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.client;

import static org.junit.Assert.assertTrue;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.fail;

import java.io.IOException;
import java.net.InetAddress;
import java.net.InetSocketAddress;

import org.apache.commons.cli.CommandLine;
import org.junit.BeforeClass;
import org.junit.Test;

import eu.stratosphere.client.CliFrontendTestUtils.TestingCliFrontend;
import eu.stratosphere.client.program.Client;
import eu.stratosphere.client.program.PackagedProgram;
import eu.stratosphere.client.program.ProgramInvocationException;
import eu.stratosphere.compiler.CompilerException;
import eu.stratosphere.configuration.Configuration;

public class CliFrontendInfoTest {
	
	@BeforeClass
	public static void init() {
		CliFrontendTestUtils.pipeSystemOutToNull();
		CliFrontendTestUtils.clearGlobalConfiguration();
	}
	
	@Test
	public void testErrorCases() {
		try {
			// test unrecognized option
			{
				String[] parameters = {"-v", "-l"};
				CliFrontend testFrontend = new CliFrontend();
				int retCode = testFrontend.cancel(parameters);
				assertTrue(retCode == 2);
			}
			
			// test missing options
			{
				String[] parameters = {};
				CliFrontend testFrontend = new CliFrontend();
				int retCode = testFrontend.cancel(parameters);
				assertTrue(retCode != 0);
			}
		}
		catch (Exception e) {
			System.err.println(e.getMessage());
			e.printStackTrace();
			fail("Program caused an exception: " + e.getMessage());
		}
	}
	
	@Test
	public void testShowDescription() {
		try {
			String[] parameters = {"-d", CliFrontendTestUtils.getTestJarPath()};
			CliFrontend testFrontend = new CliFrontend();
			int retCode = testFrontend.info(parameters);
			assertTrue(retCode == 0);
		}
		catch (Exception e) {
			System.err.println(e.getMessage());
			e.printStackTrace();
			fail("Program caused an exception: " + e.getMessage());
		}
	}
	
	@Test
	public void testShowExecutionPlan() {
		try {
			String[] parameters = {"-e", CliFrontendTestUtils.getTestJarPath()};
			InfoTestCliFrontend testFrontend = new InfoTestCliFrontend(-1);
			int retCode = testFrontend.info(parameters);
			assertTrue(retCode == 0);
		}
		catch (Exception e) {
			System.err.println(e.getMessage());
			e.printStackTrace();
			fail("Program caused an exception: " + e.getMessage());
		}
	}
	
	@Test
	public void testShowExecutionPlanWithParallelism() {
		try {
			String[] parameters = {"-e", "-p", "17", CliFrontendTestUtils.getTestJarPath()};
			InfoTestCliFrontend testFrontend = new InfoTestCliFrontend(17);
			int retCode = testFrontend.info(parameters);
			assertTrue(retCode == 0);
		}
		catch (Exception e) {
			System.err.println(e.getMessage());
			e.printStackTrace();
			fail("Program caused an exception: " + e.getMessage());
		}
	}
	
	// --------------------------------------------------------------------------------------------
	
	private static final class InfoTestCliFrontend extends TestingCliFrontend {
		
		private final int expectedDop;
		
		public InfoTestCliFrontend(int expectedDop) {
			this.expectedDop = expectedDop;
		}

		@Override
		protected Client getClient(CommandLine line) throws IOException {
			try {
				return new TestClient(expectedDop);
			}
			catch (Exception e) {
				throw new IOException(e);
			}
		}
	}
	
	private static final class TestClient extends Client {
		
		private final int expectedDop;
		
		private TestClient(int expectedDop) throws Exception {
			super(new InetSocketAddress(InetAddress.getLocalHost(), 6176), new Configuration());
			
			this.expectedDop = expectedDop;
		}
		
		@Override
		public String getOptimizedPlanAsJson(PackagedProgram prog, int parallelism) throws CompilerException, ProgramInvocationException  {
			assertEquals(this.expectedDop, parallelism);
			return "";
		}
	}
}