/*
 * 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.aggregate;

import org.apache.sysds.parser.LanguageException;
import org.apache.sysds.test.AutomatedTestBase;
import org.apache.sysds.test.TestConfiguration;
import org.junit.Test;


/**
 * <p><b>Positive tests:</b></p>
 * <ul>
 *  <li>general test</li>
 * </ul>
 * <p><b>Negative tests:</b></p>
 * <ul>
 *  <li>scalar test</li>
 * </ul>
 * 
 * 
 */
public class MaxTest extends AutomatedTestBase 
{
	
    private final static String TEST_DIR = "functions/aggregate/";
    private static final String TEST_CLASS_DIR = TEST_DIR + MaxTest.class.getSimpleName() + "/";
    private final static String TEST_GENERAL = "General";
    private final static String TEST_SCALAR = "Scalar";


    @Override
    public void setUp() {
        // positive tests
        addTestConfiguration(TEST_GENERAL, new TestConfiguration(TEST_CLASS_DIR, "MaxTest", new String[] { "vector_max",
                "matrix_max" }));
        
        // negative tests
        addTestConfiguration(TEST_SCALAR, new TestConfiguration(TEST_CLASS_DIR, "MaxScalarTest", new String[] { "vector_max",
                "matrix_max" }));
    }

    @Test
    public void testGeneral() {
        int rows = 10;
        int cols = 10;

        TestConfiguration config = getTestConfiguration(TEST_GENERAL);
        config.addVariable("rows", rows);
        config.addVariable("cols", cols);

        loadTestConfiguration(config);

        createHelperMatrix();
        double[][] vector = getRandomMatrix(rows, 1, 0, 1, 1, -1);
        double vectorMax = Double.NEGATIVE_INFINITY;
        for (int i = 0; i < rows; i++) {
            vectorMax = Math.max(vectorMax, vector[i][0]);
        }
        writeInputMatrix("vector", vector);
        writeExpectedHelperMatrix("vector_max", vectorMax);

        double[][] matrix = getRandomMatrix(rows, cols, 0, 1, 1, -1);
        double matrixMax = Double.NEGATIVE_INFINITY;
        for (int i = 0; i < rows; i++) {
            for (int j = 0; j < cols; j++) {
                matrixMax = Math.max(matrixMax, matrix[i][j]);
            }
        }
        writeInputMatrix("matrix", matrix);
        writeExpectedHelperMatrix("matrix_max", matrixMax);

        runTest();

        compareResults();
    }

    @Test
    public void testScalar() {
        int scalar = 12;

        TestConfiguration config = getTestConfiguration(TEST_SCALAR);
        config.addVariable("scalar", scalar);

        createHelperMatrix();

        loadTestConfiguration(config);

        runTest(true, LanguageException.class);
    }

}