/*******************************************************************************
 * Copyright (c) 2014 Leo Ufimtsev and others.
 *
 * This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License 2.0
 * which accompanies this distribution, and is available at
 * https://www.eclipse.org/legal/epl-2.0/
 *
 * SPDX-License-Identifier: EPL-2.0
 *
 * Contributors:
 *     Leo Ufimtsev - initial API and implementation
 *******************************************************************************/
package org.eclipse.releng.tests.tools;

import static org.junit.Assert.assertTrue;

import org.eclipse.releng.tools.AdvancedCopyrightComment;
import org.eclipse.releng.tools.BlockComment;
import org.eclipse.releng.tools.CopyrightComment;
import org.junit.Rule;
import org.junit.Test;
import org.junit.rules.TestName;


/**
 * <h1> Parse Tests </h1>
 *
 * <p> Test that year is updated correctly by the comment parser. <br>
 * This can be ran as a standard Junit4 test or as a Plugin Test </p>
 */
public class AdvancedCopyrightCommentTestsJunit4 {

    //to get name of test cases on the fly.
    @Rule public TestName name = new TestName();

    /**
     * verify that standard comment will have the new year appended to it
     */
    @Test
    public void singleYearComment() {
        String original = "<!--\n" +
                "    Copyright (c) 2000 IBM Corporation and others.  \n" +
                "    All rights reserved. This program and the accompanying materials\n" +
                "    are made available under the terms of the Eclipse Public License v1.0\n" +
                "    which accompanies this distribution, and is available at\n" +
                "    http://www.eclipse.org/legal/epl-v10.html\n" +
                "   \n" +
                "    Contributors:\n" +
                "        IBM Corporation - initial API and implementation\n" +
                " -->";

        //Last year updated to 2015
        String expectedOut = "<!--\n" +
                "    Copyright (c) 2000, 2015 IBM Corporation and others.  \n" +  //<<<< Note appended 2015
                "    All rights reserved. This program and the accompanying materials\n" +
                "    are made available under the terms of the Eclipse Public License v1.0\n" +
                "    which accompanies this distribution, and is available at\n" +
                "    http://www.eclipse.org/legal/epl-v10.html\n" +
                "   \n" +
                "    Contributors:\n" +
                "        IBM Corporation - initial API and implementation\n" +
                " -->";

        assertTrue(proccessAndCompare(original, 2015, expectedOut));
    }


    /**
     * verify standard two year comments work correctly 2000, 2014
     */
    @Test
    public void twoYearCommentCommaSeperated() {
        String original = "<!--\n" +
                "    Copyright (c) 2000, 2014 IBM Corporation and others.  \n" +
                "    All rights reserved. This program and the accompanying materials\n" +
                "    are made available under the terms of the Eclipse Public License v1.0\n" +
                "    which accompanies this distribution, and is available at\n" +
                "    http://www.eclipse.org/legal/epl-v10.html\n" +
                "   \n" +
                "    Contributors:\n" +
                "        IBM Corporation - initial API and implementation\n" +
                " -->";

        //Last year updated to 2015
        String expectedOut = "<!--\n" +
                "    Copyright (c) 2000, 2015 IBM Corporation and others.  \n" +
                "    All rights reserved. This program and the accompanying materials\n" +
                "    are made available under the terms of the Eclipse Public License v1.0\n" +
                "    which accompanies this distribution, and is available at\n" +
                "    http://www.eclipse.org/legal/epl-v10.html\n" +
                "   \n" +
                "    Contributors:\n" +
                "        IBM Corporation - initial API and implementation\n" +
                " -->";

        assertTrue(proccessAndCompare(original, 2015, expectedOut));
    }

    /**
     * verify standard two year comments work correctly 2000 - 2014 <br>
     * It should also handle dashes as well as commas.
     */
    @Test
    public void twoYearCommentDashSeperated() {
        String original = "<!--\n" +
                "    Copyright (c) 2000 - 2014 IBM Corporation and others.  \n" +
                "    All rights reserved. This program and the accompanying materials\n" +
                "    are made available under the terms of the Eclipse Public License v1.0\n" +
                "    which accompanies this distribution, and is available at\n" +
                "    http://www.eclipse.org/legal/epl-v10.html\n" +
                "   \n" +
                "    Contributors:\n" +
                "        IBM Corporation - initial API and implementation\n" +
                " -->";

        //Last year updated to 2015
        String expectedOut = "<!--\n" +
                "    Copyright (c) 2000 - 2015 IBM Corporation and others.  \n" +
                "    All rights reserved. This program and the accompanying materials\n" +
                "    are made available under the terms of the Eclipse Public License v1.0\n" +
                "    which accompanies this distribution, and is available at\n" +
                "    http://www.eclipse.org/legal/epl-v10.html\n" +
                "   \n" +
                "    Contributors:\n" +
                "        IBM Corporation - initial API and implementation\n" +
                " -->";

        assertTrue(proccessAndCompare(original, 2015, expectedOut));
    }


    /**
     * Verify that comments with multiple years are handled correctly.
     */
    @Test
    public void multiYearComment() {
        String original = "<!--\n" +
                "    Copyright (c) 2000, 2011-2012, 2014 IBM Corporation and others.  \n" +
                "    All rights reserved. This program and the accompanying materials\n" +
                "    are made available under the terms of the Eclipse Public License v1.0\n" +
                "    which accompanies this distribution, and is available at\n" +
                "    http://www.eclipse.org/legal/epl-v10.html\n" +
                "   \n" +
                "    Contributors:\n" +
                "        IBM Corporation - initial API and implementation\n" +
                " -->";

        //Last year updated to 2015
        String expectedOut = "<!--\n" +
                "    Copyright (c) 2000, 2011-2012, 2015 IBM Corporation and others.  \n" +
                "    All rights reserved. This program and the accompanying materials\n" +
                "    are made available under the terms of the Eclipse Public License v1.0\n" +
                "    which accompanies this distribution, and is available at\n" +
                "    http://www.eclipse.org/legal/epl-v10.html\n" +
                "   \n" +
                "    Contributors:\n" +
                "        IBM Corporation - initial API and implementation\n" +
                " -->";

        assertTrue(proccessAndCompare(original, 2015, expectedOut));
    }


    /**
     * Verify that newline at the end is copied across to the new comment correctly.
     */
    @Test
    public void multiYearCommentNewlinePost() {
        String original = "<!--\n" +
                "    Copyright (c) 2000, 2011-2012, 2014 IBM Corporation and others.  \n" +
                "    All rights reserved. This program and the accompanying materials\n" +
                "    are made available under the terms of the Eclipse Public License v1.0\n" +
                "    which accompanies this distribution, and is available at\n" +
                "    http://www.eclipse.org/legal/epl-v10.html\n" +
                "   \n" +
                "    Contributors:\n" +
                "        IBM Corporation - initial API and implementation\n" +
                " -->\n"; // NOTE new line char here.

        //
        String expectedOut = "<!--\n" +
                "    Copyright (c) 2000, 2011-2012, 2015 IBM Corporation and others.  \n" +
                "    All rights reserved. This program and the accompanying materials\n" +
                "    are made available under the terms of the Eclipse Public License v1.0\n" +
                "    which accompanies this distribution, and is available at\n" +
                "    http://www.eclipse.org/legal/epl-v10.html\n" +
                "   \n" +
                "    Contributors:\n" +
                "        IBM Corporation - initial API and implementation\n" +
                " -->\n";

        assertTrue(proccessAndCompare(original, 2015,expectedOut));
    }

    /**
     * Verify that newline at the beginning is copied across to the new comment correctly.
     */
    @Test
    public void multiYearCommentNewlinePre() {
        String original = "\n<!--\n" + // NOTE new line char here.
                "    Copyright (c) 2000, 2011-2012, 2014 IBM Corporation and others.  \n" +
                "    All rights reserved. This program and the accompanying materials\n" +
                "    are made available under the terms of the Eclipse Public License v1.0\n" +
                "    which accompanies this distribution, and is available at\n" +
                "    http://www.eclipse.org/legal/epl-v10.html\n" +
                "   \n" +
                "    Contributors:\n" +
                "        IBM Corporation - initial API and implementation\n" +
                " -->";

        //
        String expectedOut = "\n<!--\n" +
                "    Copyright (c) 2000, 2011-2012, 2015 IBM Corporation and others.  \n" +
                "    All rights reserved. This program and the accompanying materials\n" +
                "    are made available under the terms of the Eclipse Public License v1.0\n" +
                "    which accompanies this distribution, and is available at\n" +
                "    http://www.eclipse.org/legal/epl-v10.html\n" +
                "   \n" +
                "    Contributors:\n" +
                "        IBM Corporation - initial API and implementation\n" +
                " -->";

        assertTrue(proccessAndCompare(original, 2015,expectedOut));
    }


    /**
     * Check with Unix delimiters.
     */
    @Test
    public void unixDelimiters() {
        String original = "<!--\n" +
                "    Copyright (c) 2000, 2014 IBM Corporation and others.  \n" +
                "    All rights reserved. This program and the accompanying materials\n" +
                "    are made available under the terms of the Eclipse Public License v1.0\n" +
                "    which accompanies this distribution, and is available at\n" +
                "    http://www.eclipse.org/legal/epl-v10.html\n" +
                "   \n" +
                "    Contributors:\n" +
                "        IBM Corporation - initial API and implementation\n" +
                " -->";

        //Last year updated to 2015
        String expectedOut = "<!--\n" +
                "    Copyright (c) 2000, 2015 IBM Corporation and others.  \n" +
                "    All rights reserved. This program and the accompanying materials\n" +
                "    are made available under the terms of the Eclipse Public License v1.0\n" +
                "    which accompanies this distribution, and is available at\n" +
                "    http://www.eclipse.org/legal/epl-v10.html\n" +
                "   \n" +
                "    Contributors:\n" +
                "        IBM Corporation - initial API and implementation\n" +
                " -->";

        assertTrue(proccessAndCompare(original, 2015,expectedOut));
    }

    /**
     * Check with windows delimiters. {@code \r\n}
     */
    @Test
    public void windowsDelimiters() {
        String original = "<!--\r\n" + // NOTE new line char here.
                "    Copyright (c) 2000, 2014 IBM Corporation and others.  \r\n" +
                "    All rights reserved. This program and the accompanying materials \r\n" +
                "    are made available under the terms of the Eclipse Public License v1.0\r\n" +
                "    which accompanies this distribution, and is available at\r\n" +
                "    http://www.eclipse.org/legal/epl-v10.html\r\n" +
                "   \r\n" +
                "    Contributors:\r\n" +
                "        IBM Corporation - initial API and implementation\r\n" +
                " -->";

        String expectedOut = "<!--\r\n" + // NOTE new line char here.
                "    Copyright (c) 2000, 2015 IBM Corporation and others.  \r\n" +
                "    All rights reserved. This program and the accompanying materials \r\n" +
                "    are made available under the terms of the Eclipse Public License v1.0\r\n" +
                "    which accompanies this distribution, and is available at\r\n" +
                "    http://www.eclipse.org/legal/epl-v10.html\r\n" +
                "   \r\n" +
                "    Contributors:\r\n" +
                "        IBM Corporation - initial API and implementation\r\n" +
                " -->";

        assertTrue(proccessAndCompare(original, 2015,expectedOut));
    }

    /**
     * the tool should work with the official header.
     * https://www.eclipse.org/legal/copyrightandlicensenotice.php
     */
    @Test
    public void eclipseCopyrightComment() {
        String original =
                "    /*******************************************************************************\n" +
                "     * Copyright (c) 2000 {INITIAL COPYRIGHT OWNER} {OTHER COPYRIGHT OWNERS}.\n" +
                "     * All rights reserved. This program and the accompanying materials\n" +
                "     * are made available under the terms of the Eclipse Public License v1.0\n" +
                "     * which accompanies this distribution, and is available at\n" +
                "     * http://www.eclipse.org/legal/epl-v10.html\n" +
                "     *\n" +
                "     * Contributors:\n" +
                "     *    {INITIAL AUTHOR} - initial API and implementation and/or initial documentation\n" +
                "     *******************************************************************************/";

        String expectedOut =
                "    /*******************************************************************************\n" +
                "     * Copyright (c) 2000, 2015 {INITIAL COPYRIGHT OWNER} {OTHER COPYRIGHT OWNERS}.\n" +
                "     * All rights reserved. This program and the accompanying materials\n" +
                "     * are made available under the terms of the Eclipse Public License v1.0\n" +
                "     * which accompanies this distribution, and is available at\n" +
                "     * http://www.eclipse.org/legal/epl-v10.html\n" +
                "     *\n" +
                "     * Contributors:\n" +
                "     *    {INITIAL AUTHOR} - initial API and implementation and/or initial documentation\n" +
                "     *******************************************************************************/";

        assertTrue(proccessAndCompare(original, 2015,expectedOut));
    }

    /**
     * the tool should work with IBM headers.
     * https://www.eclipse.org/legal/copyrightandlicensenotice.php
     */
    @Test
    public void ibmCopyrightComment() {
        String original =
                "Copyright (c) 2000, 2010 IBM Corporation. \n" +
                "All rights reserved. This program and the accompanying materials \n" +
                "are made available under the terms of the Eclipse Public License v1.0 \n" +
                "which accompanies this distribution, and is available at \n" +
                "http://www.eclipse.org/legal/epl-v10.html  \n" +
                "\n" +
                "Contributors: \n" +
                "   IBM Corporation - initial API and implementation";

        String expectedOut =
                "Copyright (c) 2000, 2015 IBM Corporation. \n" +
                "All rights reserved. This program and the accompanying materials \n" +
                "are made available under the terms of the Eclipse Public License v1.0 \n" +
                "which accompanies this distribution, and is available at \n" +
                "http://www.eclipse.org/legal/epl-v10.html  \n" +
                "\n" +
                "Contributors: \n" +
                "   IBM Corporation - initial API and implementation";

        assertTrue(proccessAndCompare(original, 2015,expectedOut));
    }


    /**
     * the tool should work with non-IBM copy right comments as well. <br>.
     * for the purpose, a random realistic comment was extracted.
     */
    @Test
    public void redHatCopyrightComment() {
        String original =
                "    /*******************************************************************************\n" +
                "     * Copyright (c) 2004, 2008, 2009, 2012 Red Hat, Inc. and others\n" +
                "     * All rights reserved. This program and the accompanying materials\n" +
                "     * are made available under the terms of the Eclipse Public License v1.0\n" +
                "     * which accompanies this distribution, and is available at\n" +
                "     * http://www.eclipse.org/legal/epl-v10.html\n" +
                "     *\n" +
                "     * Contributors:\n" +
                "     *    Kent Sebastian <ksebasti@redhat.com> - initial API and implementation\n" +
                "     *    Keith Seitz <keiths@redhat.com> - setup code in launch the method, initially\n" +
                "     *        written in the now-defunct OprofileSession class\n" +
                "     *    QNX Software Systems and others - the section of code marked in the launch\n" +
                "     *        method, and the exec method\n" +
                "     *    Lev Ufimtsev <lufimtse@redhat.com> --Added automatical enablement of options\n" +
                "     *                                         if thery are not set.\n" +
                "     *    Red Hat Inc. - modification of OProfileLaunchConfigurationDelegate to here\n" +
                "     *******************************************************************************/";

        String expectedOut =
                "    /*******************************************************************************\n" +
                "     * Copyright (c) 2004, 2008, 2009, 2015 Red Hat, Inc. and others\n" +
                "     * All rights reserved. This program and the accompanying materials\n" +
                "     * are made available under the terms of the Eclipse Public License v1.0\n" +
                "     * which accompanies this distribution, and is available at\n" +
                "     * http://www.eclipse.org/legal/epl-v10.html\n" +
                "     *\n" +
                "     * Contributors:\n" +
                "     *    Kent Sebastian <ksebasti@redhat.com> - initial API and implementation\n" +
                "     *    Keith Seitz <keiths@redhat.com> - setup code in launch the method, initially\n" +
                "     *        written in the now-defunct OprofileSession class\n" +
                "     *    QNX Software Systems and others - the section of code marked in the launch\n" +
                "     *        method, and the exec method\n" +
                "     *    Lev Ufimtsev <lufimtse@redhat.com> --Added automatical enablement of options\n" +
                "     *                                         if thery are not set.\n" +
                "     *    Red Hat Inc. - modification of OProfileLaunchConfigurationDelegate to here\n" +
                "     *******************************************************************************/";

        assertTrue(proccessAndCompare(original, 2015,expectedOut));
    }


    /**
     * We test the AdvancedCopyrightComment parse(..) function.
     *
     * @param original  original comment
     * @param reviseTo  year to which it should be updated to
     * @param expected  expected updated comment.
     * @return          true if modified original matches expected.
     */
    private boolean proccessAndCompare(String original, int reviseTo, String expected) {

        //For our purposes, start/end line & start/end comment don't matter.
        BlockComment commentBlock = new BlockComment(0, 0, original, null, null);

        //Proccess input string.
        AdvancedCopyrightComment advComment = AdvancedCopyrightComment.parse(commentBlock,CopyrightComment.XML_COMMENT);

        advComment.setRevisionYear(reviseTo);

        //get updated comment.
        String actual = advComment.getCopyrightComment();

        //see if they are the same.
        boolean areSame = expected.equals(actual);

        //if tests differ, print onto console for inspection.
        if (! areSame) {
            printBadTest(original, expected, actual);
        }

        return areSame;
    }

    private void printBadTest(String original, String expected, String actual) {
        System.out.println("");
        System.out.println("----------------------------------------------");
        System.out.println("-------ERROR in test: " + name.getMethodName());
        System.out.println("----------------------------------------------");
        System.out.println("----- Original:");
        System.out.println(original);
        System.out.println("----- Expected:");
        System.out.println(expected);
        System.out.println("----- Actual: ");
        System.out.println(actual);
        System.out.println("##############################################");
    }


}