/*
 * 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.sysds.test.functions.federated.fedplanning;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.junit.runners.Parameterized;
import org.apache.sysds.api.DMLScript;
import org.apache.sysds.common.Types;
import org.apache.sysds.runtime.meta.MatrixCharacteristics;
import org.apache.sysds.test.AutomatedTestBase;
import org.apache.sysds.test.TestConfiguration;
import org.apache.sysds.test.TestUtils;

import java.io.File;
import java.util.Arrays;
import java.util.Collection;

import static org.junit.Assert.fail;

@RunWith(value = Parameterized.class)
@net.jcip.annotations.NotThreadSafe
public class FederatedMultiplyPlanningTest extends AutomatedTestBase {
	private static final Log LOG = LogFactory.getLog(FederatedMultiplyPlanningTest.class.getName());

	private final static String TEST_DIR = "functions/privacy/fedplanning/";
	private final static String TEST_NAME = "FederatedMultiplyPlanningTest";
	private final static String TEST_NAME_2 = "FederatedMultiplyPlanningTest2";
	private final static String TEST_NAME_3 = "FederatedMultiplyPlanningTest3";
	private final static String TEST_NAME_4 = "FederatedMultiplyPlanningTest4";
	private final static String TEST_NAME_5 = "FederatedMultiplyPlanningTest5";
	private final static String TEST_NAME_6 = "FederatedMultiplyPlanningTest6";
	private final static String TEST_NAME_7 = "FederatedMultiplyPlanningTest7";
	private final static String TEST_NAME_8 = "FederatedMultiplyPlanningTest8";
	private final static String TEST_NAME_9 = "FederatedMultiplyPlanningTest9";
	private final static String TEST_NAME_10 = "FederatedMultiplyPlanningTest10";
	private final static String TEST_NAME_11 = "FederatedMultiplyPlanningTest11";
	private final static String TEST_NAME_12 = "FederatedMultiplyPlanningTest12";
	private final static String TEST_CLASS_DIR = TEST_DIR + FederatedMultiplyPlanningTest.class.getSimpleName() + "/";
	private static File TEST_CONF_FILE = new File(SCRIPT_DIR + TEST_DIR, "SystemDS-config-heuristic.xml");

	private final static int blocksize = 1024;
	@Parameterized.Parameter()
	public int rows;
	@Parameterized.Parameter(1)
	public int cols;

	@Override
	public void setUp() {
		TestUtils.clearAssertionInformation();
		addTestConfiguration(TEST_NAME, new TestConfiguration(TEST_CLASS_DIR, TEST_NAME, new String[] {"Z"}));
		addTestConfiguration(TEST_NAME_2, new TestConfiguration(TEST_CLASS_DIR, TEST_NAME_2, new String[] {"Z"}));
		addTestConfiguration(TEST_NAME_3, new TestConfiguration(TEST_CLASS_DIR, TEST_NAME_3, new String[] {"Z.scalar"}));
		addTestConfiguration(TEST_NAME_4, new TestConfiguration(TEST_CLASS_DIR, TEST_NAME_4, new String[] {"Z"}));
		addTestConfiguration(TEST_NAME_5, new TestConfiguration(TEST_CLASS_DIR, TEST_NAME_5, new String[] {"Z"}));
		addTestConfiguration(TEST_NAME_6, new TestConfiguration(TEST_CLASS_DIR, TEST_NAME_6, new String[] {"Z"}));
		addTestConfiguration(TEST_NAME_7, new TestConfiguration(TEST_CLASS_DIR, TEST_NAME_7, new String[] {"Z"}));
		addTestConfiguration(TEST_NAME_8, new TestConfiguration(TEST_CLASS_DIR, TEST_NAME_8, new String[] {"Z.scalar"}));
		addTestConfiguration(TEST_NAME_9, new TestConfiguration(TEST_CLASS_DIR, TEST_NAME_9, new String[] {"Z.scalar"}));
		addTestConfiguration(TEST_NAME_10, new TestConfiguration(TEST_CLASS_DIR, TEST_NAME_10, new String[] {"Z"}));
		addTestConfiguration(TEST_NAME_11, new TestConfiguration(TEST_CLASS_DIR, TEST_NAME_11, new String[] {"Z"}));
		addTestConfiguration(TEST_NAME_12, new TestConfiguration(TEST_CLASS_DIR, TEST_NAME_12, new String[] {"Z"}));
	}

	@Parameterized.Parameters
	public static Collection<Object[]> data() {
		// rows have to be even and > 1
		return Arrays.asList(new Object[][] {
			{100, 10}
		});
	}

	@Test
	public void federatedMultiplyCP() {
		String[] expectedHeavyHitters = new String[]{"fed_*", "fed_fedinit", "fed_r'", "fed_ba+*"};
		federatedTwoMatricesSingleNodeTest(TEST_NAME, expectedHeavyHitters);
	}

	@Test
	public void federatedRowSum(){
		String[] expectedHeavyHitters = new String[]{"fed_*", "fed_r'", "fed_fedinit", "fed_ba+*", "fed_uark+"};
		federatedTwoMatricesSingleNodeTest(TEST_NAME_2, expectedHeavyHitters);
	}

	@Test
	public void federatedTernarySequence(){
		String[] expectedHeavyHitters = new String[]{"fed_+*", "fed_1-*", "fed_fedinit", "fed_uak+"};
		federatedTwoMatricesSingleNodeTest(TEST_NAME_3, expectedHeavyHitters);
	}

	@Test
	public void federatedAggregateBinarySequence(){
		cols = rows;
		String[] expectedHeavyHitters = new String[]{"fed_ba+*", "fed_*", "fed_fedinit"};
		federatedTwoMatricesSingleNodeTest(TEST_NAME_4, expectedHeavyHitters);
	}

	@Test
	public void federatedAggregateBinaryColFedSequence(){
		cols = rows;
		//TODO: When alignment checks have been added to getFederatedOut in AFederatedPlanner,
		// the following expectedHeavyHitters can be added. Until then, fed_* will not be generated.
		//String[] expectedHeavyHitters = new String[]{"fed_ba+*","fed_*","fed_fedinit"};
		String[] expectedHeavyHitters = new String[]{"fed_ba+*","fed_fedinit"};
		federatedTwoMatricesSingleNodeTest(TEST_NAME_5, expectedHeavyHitters);
	}

	@Test
	public void federatedAggregateBinarySequence2(){
		String[] expectedHeavyHitters = new String[]{"fed_ba+*","fed_fedinit"};
		federatedTwoMatricesSingleNodeTest(TEST_NAME_6, expectedHeavyHitters);
	}

	@Test
	public void federatedMultiplyDoubleHop() {
		String[] expectedHeavyHitters = new String[]{"fed_*", "fed_fedinit", "fed_ba+*"}; //TODO "fed_r' " ?
		federatedTwoMatricesSingleNodeTest(TEST_NAME_7, expectedHeavyHitters);
	}

	@Test
	public void federatedMultiplyDoubleHop2() {
		String[] expectedHeavyHitters = new String[]{"fed_fedinit", "fed_ba+*"};
		federatedTwoMatricesSingleNodeTest(TEST_NAME_8, expectedHeavyHitters);
	}

	@Test
	public void federatedMultiplyPlanningTest9(){
		String[] expectedHeavyHitters = new String[]{"fed_+*", "fed_1-*", "fed_fedinit", "fed_max"}; //TODO "fed_tak+*"
		federatedTwoMatricesSingleNodeTest(TEST_NAME_9, expectedHeavyHitters);
	}

	@Test
	public void federatedMultiplyPlanningTest10(){
		String[] expectedHeavyHitters = new String[]{"fed_fedinit", "fed_^2"};
		TEST_CONF_FILE = new File(SCRIPT_DIR + TEST_DIR, "SystemDS-config-fout.xml");
		federatedTwoMatricesSingleNodeTest(TEST_NAME_10, expectedHeavyHitters);
	}

	@Test
	public void federatedMultiplyPlanningTest11(){
		String[] expectedHeavyHitters = new String[]{"fed_fedinit"};
		federatedTwoMatricesSingleNodeTest(TEST_NAME_11, expectedHeavyHitters);
	}

	@Test
	public void federatedMultiplyPlanningTest12(){
		String[] expectedHeavyHitters = new String[]{"fed_fedinit"};
		rows = 30;
		cols = 30;
		federatedTwoMatricesSingleNodeTest(TEST_NAME_12, expectedHeavyHitters);
	}

	private void writeStandardMatrix(String matrixName, long seed){
		int halfRows = rows/2;
		double[][] matrix = getRandomMatrix(halfRows, cols, 0, 1, 1, seed);
		MatrixCharacteristics mc = new MatrixCharacteristics(halfRows, cols, blocksize, (long) halfRows * cols);
		writeInputMatrixWithMTD(matrixName, matrix, false, mc);
	}

	private void writeColStandardMatrix(String matrixName, long seed){
		int halfCols = cols/2;
		double[][] matrix = getRandomMatrix(rows, halfCols, 0, 1, 1, seed);
		MatrixCharacteristics mc = new MatrixCharacteristics(rows, halfCols, blocksize, (long) halfCols *rows);
		writeInputMatrixWithMTD(matrixName, matrix, false, mc);
	}

	private void writeRowFederatedVector(String matrixName, long seed){
		int halfCols = cols / 2;
		double[][] matrix = getRandomMatrix(halfCols, 1, 0, 1, 1, seed);
		MatrixCharacteristics mc = new MatrixCharacteristics(halfCols, 1, blocksize, (long) halfCols *rows);
		writeInputMatrixWithMTD(matrixName, matrix, false, mc);
	}

	private void writeInputMatrices(String testName){
		if ( testName.equals(TEST_NAME_5) ){
			writeColStandardMatrix("X1", 42);
			writeColStandardMatrix("X2", 1340);
			writeColStandardMatrix("Y1", 44);
			writeColStandardMatrix("Y2", 21);
		}
		else if ( testName.equals(TEST_NAME_6) ){
			writeColStandardMatrix("X1", 42);
			writeColStandardMatrix("X2", 1340);
			writeRowFederatedVector("Y1", 44);
			writeRowFederatedVector("Y2", 21);
		}
		else if ( testName.equals(TEST_NAME_8) ){
			writeColStandardMatrix("X1", 42);
			writeColStandardMatrix("X2", 1340);
			writeColStandardMatrix("Y1", 44);
			writeColStandardMatrix("Y2", 21);
			writeColStandardMatrix("W1", 76);
			writeColStandardMatrix("W2", 11);
		}
		else if ( testName.equals(TEST_NAME_10) || testName.equals(TEST_NAME_12) ){
			writeStandardMatrix("X1", 42);
			writeStandardMatrix("X2", 1340);
		}
		else {
			writeStandardMatrix("X1", 42);
			writeStandardMatrix("X2", 1340);
			if ( testName.equals(TEST_NAME_4) ){
				writeStandardMatrix("Y1", 44);
				writeStandardMatrix("Y2", 21);
			}
			else {
				writeStandardMatrix("Y1", 44);
				writeStandardMatrix("Y2", 21);
			}
		}
	}

	private void federatedTwoMatricesSingleNodeTest(String testName, String[] expectedHeavyHitters){
		federatedTwoMatricesTest(Types.ExecMode.SINGLE_NODE, testName, expectedHeavyHitters);
	}

	private void federatedTwoMatricesTest(Types.ExecMode execMode, String testName, String[] expectedHeavyHitters) {
		boolean sparkConfigOld = DMLScript.USE_LOCAL_SPARK_CONFIG;
		Types.ExecMode platformOld = rtplatform;
		rtplatform = execMode;
		if(rtplatform == Types.ExecMode.SPARK) {
			DMLScript.USE_LOCAL_SPARK_CONFIG = true;
		}
		Thread[] workers = null;

		try{
			getAndLoadTestConfiguration(testName);
			String HOME = SCRIPT_DIR + TEST_DIR;

			writeInputMatrices(testName);

			int port1 = getRandomAvailablePort();
			int port2 = getRandomAvailablePort();
			workers = startLocalFedWorkerThreads(new int[] {port1, port2}, null, FED_WORKER_WAIT);

			// Run actual dml script with federated matrix
			fullDMLScriptName = HOME + testName + ".dml";
			programArgs = new String[] {"-stats", "-nvargs", "X1=" + TestUtils.federatedAddress(port1, input("X1")),
				"X2=" + TestUtils.federatedAddress(port2, input("X2")),
				"Y1=" + TestUtils.federatedAddress(port1, input("Y1")),
				"Y2=" + TestUtils.federatedAddress(port2, input("Y2")), "r=" + rows, "c=" + cols, "Z=" + output("Z")};
			rewriteRealProgramArgs(testName, port1, port2);
			runTest(true, false, null, -1);

			// Run reference dml script with normal matrix
			fullDMLScriptName = HOME + testName + "Reference.dml";
			programArgs = new String[] {"-nvargs", "X1=" + input("X1"), "X2=" + input("X2"), "Y1=" + input("Y1"),
				"Y2=" + input("Y2"), "Z=" + expected("Z")};
			rewriteReferenceProgramArgs(testName);
			runTest(true, false, null, -1);

			// compare via files
			compareResults(1e-9);
			if (!heavyHittersContainsAllString(expectedHeavyHitters))
				fail("The following expected heavy hitters are missing: "
					+ Arrays.toString(missingHeavyHitters(expectedHeavyHitters)));
		} finally {
			TestUtils.shutdownThreads(workers);
			rtplatform = platformOld;
			DMLScript.USE_LOCAL_SPARK_CONFIG = sparkConfigOld;
		}
	}

	private void rewriteRealProgramArgs(String testName, int port1, int port2){
		if ( testName.equals(TEST_NAME_4) || testName.equals(TEST_NAME_5) ){
			programArgs = new String[] {"-stats","-nvargs", "X1=" + TestUtils.federatedAddress(port1, input("X1")),
				"X2=" + TestUtils.federatedAddress(port2, input("X2")),
				"Y1=" + input("Y1"),
				"Y2=" + input("Y2"), "r=" + rows, "c=" + cols, "Z=" + output("Z")};
		} else if ( testName.equals(TEST_NAME_8) ){
			programArgs = new String[] {"-stats","-nvargs", "X1=" + TestUtils.federatedAddress(port1, input("X1")),
				"X2=" + TestUtils.federatedAddress(port2, input("X2")),
				"Y1=" + TestUtils.federatedAddress(port1, input("Y1")),
				"Y2=" + TestUtils.federatedAddress(port2, input("Y2")),
				"W1=" + input("W1"),
				"W2=" + input("W2"),
				"r=" + rows, "c=" + cols, "Z=" + output("Z")};
		}
	}

	private void rewriteReferenceProgramArgs(String testName){
		if ( testName.equals(TEST_NAME_8) ){
			programArgs = new String[] {"-nvargs", "X1=" + input("X1"), "X2=" + input("X2"), "Y1=" + input("Y1"),
				"Y2=" + input("Y2"), "W1=" + input("W1"), "W2=" + input("W2"), "Z=" + expected("Z")};
		}
	}

	/**
	 * Override default configuration with custom test configuration to ensure
	 * scratch space and local temporary directory locations are also updated.
	 */
	@Override
	protected File getConfigTemplateFile() {
		// Instrumentation in this test's output log to show custom configuration file used for template.
		LOG.info("This test case overrides default configuration with " + TEST_CONF_FILE.getPath());
		return TEST_CONF_FILE;
	}
}
