/*
 * 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.blocks;

import org.junit.Test;
import org.apache.sysds.test.AutomatedTestBase;
import org.apache.sysds.test.TestConfiguration;
import org.apache.sysds.test.TestUtils;


/**
 * <p><b>Positive tests:</b></p>
 * <ul>
 *  <li>variable passing 1</li>
 *  <li>variable passing 2</li>
 *  <li>variable analysis 1</li>
 * </ul>
 * <p><b>Negative tests:</b></p>
 * 
 * 
 */
public class VariableTest extends AutomatedTestBase
{
	
    private final static String TEST_DIR = "functions/blocks/";
    private final static String TEST_CLASS_DIR = TEST_DIR + VariableTest.class.getSimpleName() + "/";
    private final static String TEST_VARIABLE_PASSING_1 = "VariablePassing1";
    private final static String TEST_VARIABLE_PASSING_2 = "VariablePassing2";
    private final static String TEST_VARIABLE_ANALYSIS_1 = "VariableAnalysis1";


    @Override
    public void setUp()
    {
        // positive tests
        addTestConfiguration(TEST_VARIABLE_PASSING_1, new TestConfiguration(TEST_CLASS_DIR, "VariablePassing1Test",
                new String[] { "c", "e", "f" }));
        addTestConfiguration(TEST_VARIABLE_PASSING_2, new TestConfiguration(TEST_CLASS_DIR, "VariablePassing2Test",
                new String[] { "d" }));
        addTestConfiguration(TEST_VARIABLE_ANALYSIS_1, new TestConfiguration(TEST_CLASS_DIR, "VariableAnalysis1Test",
                new String[] { "b" }));

        // negative tests
    }

    @Test
    public void testVariablePassing1()
    {
        int rows = 10;
        int cols = 10;

        TestConfiguration config = getTestConfiguration(TEST_VARIABLE_PASSING_1);
        config.addVariable("rows", rows);
        config.addVariable("cols", cols);

        loadTestConfiguration(config);

        double[][] a = getRandomMatrix(rows, cols, -1, 1, 1, -1);
        writeInputMatrix("a", a);
        double[][] b = getRandomMatrix(rows, cols, -1, 1, 1, -1);
        writeInputMatrix("b", b);

        double x = 0;
        double[][] c = new double[rows][cols];
        for (int i = 0; i < rows; i++)
        {
            for (int j = 0; j < cols; j++)
            {
                x += a[i][j];
            }
        }

        double[][] d = new double[rows][cols];
        double[][] f = new double[rows][cols];
        double[][] e = new double[rows][cols];
        for (int i = 0; i < rows; i++)
        {
            for (int j = 0; j < cols; j++)
            {
                d[i][j] = x * a[i][j];
                c[i][j] = b[i][j] * d[i][j];
                b[i][j] = b[i][j] * d[i][j];
                f[i][j] = 3 * b[i][j];
                e[i][j] = 3 * d[i][j];
            }
        }

        writeExpectedMatrix("c", c);
        writeExpectedMatrix("f", f);
        writeExpectedMatrix("e", e);

        runTest();

        compareResults(1e-12);
    }
    
    @Test
    public void testVariablePassing2() {
        int rows = 10;
        int cols = 10;
        int factor = 5;
        
        TestConfiguration config = getTestConfiguration(TEST_VARIABLE_PASSING_2);
        config.addVariable("rows", rows);
        config.addVariable("cols", cols);
        config.addVariable("factor", factor);
        
        loadTestConfiguration(config);
        
        double[][] a = getRandomMatrix(rows, cols, -1, 1, 0.5, -1);
        writeInputMatrix("a", a);
        
        double[][] b = new double[cols][rows];
        for(int i = 0; i < rows; i++) {
            for(int j = 0; j < cols; j++) {
                b[j][i] = factor * a[i][j];
            }
        }
        
        double[][] c = TestUtils.performMatrixMultiplication(a, b);
        
        double[][] d = TestUtils.performMatrixMultiplication(b, c);
        writeExpectedMatrix("d", d);
        
        runTest();

        compareResults(1e-12);
    }

    @Test
    public void testVariableAnalysis1()
    {
        int rows = 10;
        int cols = 10;

        TestConfiguration config = getTestConfiguration(TEST_VARIABLE_ANALYSIS_1);
        config.addVariable("rows", rows);
        config.addVariable("cols", cols);

        loadTestConfiguration(config);

        double[][] a = getRandomMatrix(rows, cols, -1, 1, 0.5, -1);
        writeInputMatrix("a", a);
        writeExpectedMatrix("b", a);

        runTest();

        compareResults(1e-12);
    }

}
