/*
 * 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.hg.command.checkin;

import java.io.File;
import java.util.ArrayList;
import java.util.List;

import org.apache.commons.lang3.StringUtils;
import org.apache.maven.scm.ScmException;
import org.apache.maven.scm.ScmFile;
import org.apache.maven.scm.ScmFileSet;
import org.apache.maven.scm.ScmFileStatus;
import org.apache.maven.scm.ScmResult;
import org.apache.maven.scm.ScmVersion;
import org.apache.maven.scm.command.checkin.AbstractCheckInCommand;
import org.apache.maven.scm.command.checkin.CheckInScmResult;
import org.apache.maven.scm.command.status.StatusScmResult;
import org.apache.maven.scm.provider.ScmProviderRepository;
import org.apache.maven.scm.provider.hg.HgUtils;
import org.apache.maven.scm.provider.hg.command.HgCommandConstants;
import org.apache.maven.scm.provider.hg.command.HgConsumer;
import org.apache.maven.scm.provider.hg.command.status.HgStatusCommand;
import org.apache.maven.scm.provider.hg.repository.HgScmProviderRepository;

/**
 * @author <a href="mailto:thurner.rupert@ymono.net">thurner rupert</a>
 * @author Olivier Lamy
 *
 */
public class HgCheckInCommand extends AbstractCheckInCommand {
    /**
     * {@inheritDoc}
     */
    protected CheckInScmResult executeCheckInCommand(
            ScmProviderRepository repo, ScmFileSet fileSet, String message, ScmVersion tag) throws ScmException {
        if (tag != null && !StringUtils.isEmpty(tag.getName())) {
            throw new ScmException("This provider can't handle tags for this operation");
        }

        File workingDir = fileSet.getBasedir();
        String branchName = HgUtils.getCurrentBranchName(workingDir);
        boolean differentOutgoingBranch =
                repo.isPushChanges() ? HgUtils.differentOutgoingBranchFound(workingDir, branchName) : false;

        // Get files that will be committed (if not specified in fileSet)
        List<ScmFile> commitedFiles = new ArrayList<>();
        List<File> files = fileSet.getFileList();
        if (files.isEmpty()) { // Either commit all changes
            HgStatusCommand statusCmd = new HgStatusCommand();
            StatusScmResult status = statusCmd.executeStatusCommand(repo, fileSet);
            List<ScmFile> statusFiles = status.getChangedFiles();
            for (ScmFile file : statusFiles) {
                if (file.getStatus() == ScmFileStatus.ADDED
                        || file.getStatus() == ScmFileStatus.DELETED
                        || file.getStatus() == ScmFileStatus.MODIFIED) {
                    commitedFiles.add(new ScmFile(file.getPath(), ScmFileStatus.CHECKED_IN));
                }
            }

        } else { // Or commit spesific files
            for (File file : files) {
                commitedFiles.add(new ScmFile(file.getPath(), ScmFileStatus.CHECKED_IN));
            }
        }

        // Commit to local branch
        String[] commitCmd = new String[] {HgCommandConstants.COMMIT_CMD, HgCommandConstants.MESSAGE_OPTION, message};
        commitCmd = HgUtils.expandCommandLine(commitCmd, fileSet);
        ScmResult result = HgUtils.execute(new HgConsumer(), fileSet.getBasedir(), commitCmd);

        // Push to parent branch if any
        HgScmProviderRepository repository = (HgScmProviderRepository) repo;

        if (repo.isPushChanges()) {

            if (!repository.getURI().equals(fileSet.getBasedir().getAbsolutePath())) {
                String[] pushCmd = new String[] {
                    HgCommandConstants.PUSH_CMD,
                    differentOutgoingBranch ? HgCommandConstants.REVISION_OPTION + branchName : null,
                    repository.getURI()
                };

                result = HgUtils.execute(new HgConsumer(), fileSet.getBasedir(), pushCmd);
            }

            return new CheckInScmResult(commitedFiles, result);
        }

        return new CheckInScmResult(commitedFiles, result);
    }
}
