/*
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 *
 * The contents of this file are subject to the terms of the
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 * You may not use this file except in compliance with the License.
 *
 * See LICENSE.txt included in this distribution for the specific
 * language governing permissions and limitations under the License.
 *
 * When distributing Covered Code, include this CDDL HEADER in each
 * file and include the License file at LICENSE.txt.
 * If applicable, add the following below this CDDL HEADER, with the
 * fields enclosed by brackets "[]" replaced with your own identifying
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/*
 * Copyright (c) 2008, 2022, Oracle and/or its affiliates. All rights reserved.
 */
package org.opengrok.indexer.history;

import org.junit.jupiter.api.AfterEach;
import org.junit.jupiter.api.BeforeEach;
import org.junit.jupiter.api.Test;
import org.opengrok.indexer.condition.EnabledForRepository;
import org.opengrok.indexer.condition.RepositoryInstalled;
import org.opengrok.indexer.util.IOUtils;
import org.opengrok.indexer.util.TestRepository;

import java.io.File;
import java.io.IOException;
import java.io.InputStream;
import java.net.URISyntaxException;
import java.util.Date;
import java.util.List;
import java.util.Map;

import static org.junit.jupiter.api.Assertions.assertEquals;
import static org.junit.jupiter.api.Assertions.assertNotNull;
import static org.junit.jupiter.api.Assertions.assertTrue;
import static org.opengrok.indexer.history.CVSRepositoryTest.runCvsCommand;

/**
 * Test {@code cvs log} output parsing in {@link CVSHistoryParser}.
 * @author austvik
 */
class CVSHistoryParserTest {

    CVSHistoryParser instance;

    private TestRepository repository;

    /**
     * Set up a test repository. Should be called by the tests that need it. The
     * test repository will be destroyed automatically when the test finishes.
     */
    private File setUpTestRepository() throws IOException, URISyntaxException {
        repository = new TestRepository();
        repository.create(getClass().getResource("/repositories"));

        // Checkout cvsrepo anew in order to get the CVS/Root files point to
        // the temporary directory rather than the OpenGrok workspace directory
        // it was created from. This is necessary for the 'cvs log' command to work correctly.
        File root = new File(repository.getSourceRoot(), "cvs_test");
        File cvsrepodir = new File(root, "cvsrepo");
        IOUtils.removeRecursive(cvsrepodir.toPath());
        File cvsroot = new File(root, "cvsroot");
        runCvsCommand(root, "-d", cvsroot.getAbsolutePath(), "checkout", "cvsrepo");
        return cvsrepodir;
    }

    @BeforeEach
    public void setUp() {
        instance = new CVSHistoryParser();
    }

    @AfterEach
    public void tearDown() {
        instance = null;

        if (repository != null) {
            repository.destroy();
            repository = null;
        }
    }

    /**
     * Test of parse method, of class CVSHistoryParser.
     * @throws Exception exception
     */
    @Test
    void parseEmpty() throws Exception {
        History result = instance.parse("");
        assertNotNull(result);
        assertEquals(0, result.getHistoryEntries().size(), "Should not contain any history entries");
    }

    /**
     * Parse something that could come out from the W3C public CVS repository.
     */
    @Test
    void parseALaW3C() throws Exception {
        String revId1 = "1.2";
        String revId2 = "1.2.4.5";
        String revId3 = "1.134";
        String tag1 = "file_tag";
        String author1 = "username";
        String author2 = "username2";
        String date1 = "2005-05-16 21:22:34 +0200";
        String date2 = "2007-05-16 22:21:30 +0300";
        String output = "\n" +
                "\n" +
                "  RCS file: /some/file/name.ext,v\n" +
                "Working file: name.ext\n" +
                "head: 1.23\n" +
                "branch:\n" +
                "locks: strict\n" +
                "access list:\n" +
                "symbolic names:\n" +
                "\t" + tag1 + ": " + revId2 + "\n" +
                "keyword substitution: kv\n" +
                "total revisions: 4;\tselected revisions: 3\n" +
                "description:\n" +
                "----------------------------\n" +
                "revision " + revId1 + "\n" +
                "date: " + date1 + ";  author: " + author1 +
                ";  state: Exp;  lines: +2 -2;\n" +
                "a comment\n" +
                "----------------------------\n" +
                "revision " + revId2 + "\n" +
                "date: " + date2 + ";  author: " + author2 +
                ";  state: Exp;  lines: +2 -4;\n" +
                "just a short comment\n" +
                "----------------------------\n" +
                "revision " + revId3 + "\n" +
                "date: " + date1 + ";  author: " + author1 +
                ";  state: Exp;  lines: +6 -2;\n" +
                "some comment that is\n" +
                "--------\n" +
                "spanning multiple lines\n" +
                "==========================================================" +
                "===================\n";
        History result = instance.parse(output);
        assertNotNull(result);
        assertEquals(3, result.getHistoryEntries().size());
        HistoryEntry e0 = result.getHistoryEntries().get(0);
        assertEquals(revId1, e0.getRevision());
        assertEquals(author1, e0.getAuthor());
        assertEquals(0, e0.getFiles().size());
        HistoryEntry e1 = result.getHistoryEntries().get(1);
        assertEquals(revId2, e1.getRevision());
        assertEquals(author2, e1.getAuthor());
        assertEquals(0, e1.getFiles().size());
        HistoryEntry e2 = result.getHistoryEntries().get(2);
        assertEquals(revId3, e2.getRevision());
        assertEquals(author1, e2.getAuthor());
        assertEquals(0, e2.getFiles().size());
        assertTrue(e2.getMessage().contains("some"), "Should contain comment of both lines: line 1");
        assertTrue(e2.getMessage().contains("multiple"), "Should contain comment of both lines: line 2");

        assertEquals(Map.of(revId2, tag1), result.getTags());
    }

    /**
     * Check that history can be retrieved for a directory. This is needed for the web application to operate
     * correctly. Specifically, this tests the state transitions in {@link CVSHistoryParser#processStream(InputStream)}.
     */
    @EnabledForRepository(RepositoryInstalled.Type.CVS)
    @Test
    void testHistoryForDirectory() throws Exception {
        File repoRoot = setUpTestRepository();
        assertTrue(repoRoot.exists());
        assertTrue(repoRoot.isDirectory());
        CVSRepository repository = (CVSRepository) RepositoryFactory.getRepository(repoRoot);
        assertNotNull(repository);
        History history = repository.getHistory(repoRoot);
        assertNotNull(history);
        assertNotNull(history.getHistoryEntries());
        assertEquals(3, history.getHistoryEntries().size());

        List<HistoryEntry> entries = List.of(
                new HistoryEntry("1.1.1.1", new Date(1220544581000L),
                        "austvik",
                        "Add files\n", true),
                new HistoryEntry("1.2", new Date(1220544684000L),
                        "austvik",
                        "Added a comment\n", true),
                new HistoryEntry("1.1", new Date(1220544581000L),
                        "austvik",
                        "branches:  1.1.1;\n" +
                                "Initial revision\n", true)
                );

        assertEquals(entries.size(), history.getHistoryEntries().size());
        History expectedHistory = new History(entries);
        expectedHistory.setTags(Map.of("1.1.1.1", "start"));
        assertEquals(expectedHistory, history);
    }
}