/*
 * 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.checkout;

import java.io.File;
import java.io.IOException;
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.ScmFileSet;
import org.apache.maven.scm.ScmResult;
import org.apache.maven.scm.ScmVersion;
import org.apache.maven.scm.command.Command;
import org.apache.maven.scm.command.checkout.AbstractCheckOutCommand;
import org.apache.maven.scm.command.checkout.CheckOutScmResult;
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.repository.HgScmProviderRepository;
import org.codehaus.plexus.util.FileUtils;

/**
 * @author <a href="mailto:thurner.rupert@ymono.net">thurner rupert</a>
 * @author Olivier Lamy
 */
public class HgCheckOutCommand extends AbstractCheckOutCommand implements Command {
    /**
     * {@inheritDoc}
     */
    protected CheckOutScmResult executeCheckOutCommand(
            ScmProviderRepository repo, ScmFileSet fileSet, ScmVersion scmVersion, boolean recursive, boolean shallow)
            throws ScmException {
        HgScmProviderRepository repository = (HgScmProviderRepository) repo;
        String url = repository.getURI();

        File checkoutDir = fileSet.getBasedir();
        try {
            if (logger.isDebugEnabled()) {
                logger.debug("Removing " + checkoutDir);
            }
            FileUtils.deleteDirectory(checkoutDir);
        } catch (IOException e) {
            throw new ScmException("Cannot remove " + checkoutDir);
        }

        // Do the actual checkout
        List<String> cmdList = new ArrayList<>();
        if (repo.isPushChanges()) {
            cmdList.add(HgCommandConstants.CLONE_CMD);
        } else {
            cmdList.add(HgCommandConstants.UPDATE_CMD);
        }
        if (scmVersion != null && !StringUtils.isEmpty(scmVersion.getName())) {
            cmdList.add(HgCommandConstants.REVISION_OPTION);
            cmdList.add(scmVersion.getName());
        }
        if (!repo.isPushChanges()) {
            cmdList.add(HgCommandConstants.CLEAN_OPTION);
        }
        cmdList.add(url);
        cmdList.add(checkoutDir.getAbsolutePath());
        String[] checkoutCmd = cmdList.toArray(new String[0]);
        HgConsumer checkoutConsumer = new HgConsumer();
        HgUtils.execute(checkoutConsumer, checkoutDir.getParentFile(), checkoutCmd);

        // Do inventory to find list of checkedout files
        String[] inventoryCmd = new String[] {HgCommandConstants.INVENTORY_CMD};
        HgCheckOutConsumer consumer = new HgCheckOutConsumer(checkoutDir);
        ScmResult result = HgUtils.execute(consumer, checkoutDir, inventoryCmd);

        return new CheckOutScmResult(consumer.getCheckedOutFiles(), result);
    }
}
