/*
 * 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.maven.scm.tck.command.diff;

import java.io.File;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import java.util.TreeSet;

import org.apache.maven.scm.ScmFile;
import org.apache.maven.scm.ScmFileSet;
import org.apache.maven.scm.ScmTckTestCase;
import org.apache.maven.scm.ScmTestCase;
import org.apache.maven.scm.ScmVersion;
import org.apache.maven.scm.command.diff.DiffScmResult;
import org.apache.maven.scm.provider.ScmProvider;
import org.apache.maven.scm.repository.ScmRepository;
import org.junit.Test;

import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertNotNull;
import static org.junit.Assert.assertTrue;

/**
 * This test tests the diff command.
 *
 * @author <a href="mailto:brett@apache.org">Brett Porter</a>
 *
 */
public abstract class DiffCommandTckTest extends ScmTckTestCase {

    @Test
    public void testDiffCommand() throws Exception {
        ScmRepository repository = getScmRepository();

        // ----------------------------------------------------------------------
        // Change the files
        // ----------------------------------------------------------------------

        //
        // readme.txt is changed (changed file in the root directory)
        // project.xml is added (added file in the root directory)
        // src/test/resources is untouched (a empty directory is left untouched)
        // src/test/java is untouched (a non empty directory is left untouched)
        // src/test/java/org (a empty directory is added)
        // src/main/java/org/Foo.java (a non empty directory is added)
        //

        // /readme.txt
        ScmTestCase.makeFile(getWorkingCopy(), "/readme.txt", "changed readme.txt");

        // /project.xml
        ScmTestCase.makeFile(getWorkingCopy(), "/project.xml", "changed project.xml");

        addToWorkingTree(getWorkingCopy(), new File("project.xml"), repository);

        // /src/test/java/org
        ScmTestCase.makeDirectory(getWorkingCopy(), "/src/test/java/org");

        addToWorkingTree(getWorkingCopy(), new File("src/test/java/org"), repository);

        // /src/main/java/org/Foo.java
        ScmTestCase.makeFile(getWorkingCopy(), "/src/main/java/org/Foo.java");

        addToWorkingTree(getWorkingCopy(), new File("src/main/java/org"), repository);

        // src/main/java/org/Foo.java
        addToWorkingTree(getWorkingCopy(), new File("src/main/java/org/Foo.java"), repository);

        // ----------------------------------------------------------------------
        // Diff the project
        // ----------------------------------------------------------------------

        ScmProvider provider = getScmManager().getProviderByUrl(getScmUrl());
        ScmFileSet fileSet = new ScmFileSet(getWorkingCopy());
        DiffScmResult result = provider.diff(repository, fileSet, null, (ScmVersion) null);

        assertNotNull("The command returned a null result.", result);

        assertResultIsSuccess(result);

        List<ScmFile> changedFiles = result.getChangedFiles();

        Map<String, CharSequence> differences = result.getDifferences();

        assertEquals("Expected 3 files in the changed files list " + changedFiles, 3, changedFiles.size());

        assertEquals("Expected 3 files in the differences list " + differences, 3, differences.size());

        // ----------------------------------------------------------------------
        // Assert the files in the changed files list
        // ----------------------------------------------------------------------

        Iterator<ScmFile> files = new TreeSet<ScmFile>(changedFiles).iterator();

        // Check Foo.java
        ScmFile file = files.next();

        assertPath("src/main/java/org/Foo.java", file.getPath());

        assertTrue(file.getStatus().isDiff());

        String postRangeStr = "+/src/main/java/org/Foo.java\n\\ No newline at end of file\n";
        String actualStr = differences.get(file.getPath()).toString();
        assertTrue(actualStr.endsWith(postRangeStr));

        // Check readme.txt
        file = files.next();

        assertPath("readme.txt", file.getPath());

        assertTrue(file.getStatus().isDiff());

        postRangeStr =
                "-/readme.txt\n\\ No newline at end of file\n+changed readme.txt\n\\ No newline at end of file\n";
        actualStr = differences.get(file.getPath()).toString();
        assertTrue(actualStr.endsWith(postRangeStr));

        // Check project.xml
        file = files.next();

        assertPath("project.xml", file.getPath());

        postRangeStr = "+changed project.xml\n\\ No newline at end of file\n";
        actualStr = differences.get(file.getPath()).toString();
        assertTrue(actualStr.endsWith(postRangeStr));

        assertTrue(file.getStatus().isDiff());
    }
}
