/*
 * 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.provider.git.gitexe.command.remove;

import java.io.File;
import java.net.URI;
import java.util.List;

import org.apache.maven.scm.ScmException;
import org.apache.maven.scm.ScmFileSet;
import org.apache.maven.scm.ScmResult;
import org.apache.maven.scm.command.remove.AbstractRemoveCommand;
import org.apache.maven.scm.command.remove.RemoveScmResult;
import org.apache.maven.scm.provider.ScmProviderRepository;
import org.apache.maven.scm.provider.git.command.GitCommand;
import org.apache.maven.scm.provider.git.gitexe.command.GitCommandLineUtils;
import org.apache.maven.scm.provider.git.gitexe.command.status.GitStatusCommand;
import org.codehaus.plexus.util.cli.CommandLineUtils;
import org.codehaus.plexus.util.cli.Commandline;

/**
 * @author <a href="mailto:struberg@yahoo.de">Mark Struberg</a>
 * @author Olivier Lamy
 */
public class GitRemoveCommand extends AbstractRemoveCommand implements GitCommand {
    /**
     * {@inheritDoc}
     */
    protected ScmResult executeRemoveCommand(ScmProviderRepository repo, ScmFileSet fileSet, String message)
            throws ScmException {

        if (fileSet.getFileList().isEmpty()) {
            throw new ScmException("You must provide at least one file/directory to remove");
        }

        Commandline cl = createCommandLine(fileSet.getBasedir(), fileSet.getFileList());

        // git-rm uses repositoryRoot instead of workingDirectory, adjust it with relativeRepositoryPath
        URI relativeRepositoryPath = GitStatusCommand.getRelativeCWD(logger, fileSet);
        GitRemoveConsumer consumer = new GitRemoveConsumer(relativeRepositoryPath);

        CommandLineUtils.StringStreamConsumer stderr = new CommandLineUtils.StringStreamConsumer();

        int exitCode;

        exitCode = GitCommandLineUtils.execute(cl, consumer, stderr);
        if (exitCode != 0) {
            return new RemoveScmResult(cl.toString(), "The git command failed.", stderr.getOutput(), false);
        }

        return new RemoveScmResult(cl.toString(), consumer.getRemovedFiles());
    }

    public static Commandline createCommandLine(File workingDirectory, List<File> files) throws ScmException {
        Commandline cl = GitCommandLineUtils.getBaseGitCommandLine(workingDirectory, "rm");

        for (File file : files) {
            if (file.isAbsolute()) {
                if (file.isDirectory()) {
                    cl.createArg().setValue("-r");
                    break;
                }
            } else {
                File absFile = new File(workingDirectory, file.getPath());
                if (absFile.isDirectory()) {
                    cl.createArg().setValue("-r");
                    break;
                }
            }
        }

        // use this separator to make clear that the following parameters are files and options.
        cl.createArg().setValue("--");

        GitCommandLineUtils.addTarget(cl, files);

        return cl;
    }
}
