/*
 * 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.shared.release.phase;

import javax.inject.Inject;
import javax.inject.Named;
import javax.inject.Singleton;

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

import org.apache.maven.project.MavenProject;
import org.apache.maven.scm.CommandParameter;
import org.apache.maven.scm.CommandParameters;
import org.apache.maven.scm.ScmException;
import org.apache.maven.scm.ScmFileSet;
import org.apache.maven.scm.command.untag.UntagScmResult;
import org.apache.maven.scm.manager.NoSuchScmProviderException;
import org.apache.maven.scm.provider.ScmProvider;
import org.apache.maven.scm.repository.ScmRepository;
import org.apache.maven.scm.repository.ScmRepositoryException;
import org.apache.maven.shared.release.ReleaseExecutionException;
import org.apache.maven.shared.release.ReleaseFailureException;
import org.apache.maven.shared.release.ReleaseResult;
import org.apache.maven.shared.release.config.ReleaseDescriptor;
import org.apache.maven.shared.release.env.ReleaseEnvironment;
import org.apache.maven.shared.release.scm.ReleaseScmRepositoryException;
import org.apache.maven.shared.release.scm.ScmRepositoryConfigurator;
import org.apache.maven.shared.release.util.ReleaseUtil;

import static java.util.Objects.requireNonNull;

/**
 * Remove tag from SCM repository during rollback.
 */
@Singleton
@Named("remove-scm-tag")
public class RemoveScmTagPhase extends AbstractReleasePhase {
    /**
     * Tool that gets a configured SCM repository from release configuration.
     */
    private final ScmRepositoryConfigurator scmRepositoryConfigurator;

    @Inject
    public RemoveScmTagPhase(ScmRepositoryConfigurator scmRepositoryConfigurator) {
        this.scmRepositoryConfigurator = requireNonNull(scmRepositoryConfigurator);
    }

    @Override
    public ReleaseResult execute(
            ReleaseDescriptor releaseDescriptor,
            ReleaseEnvironment releaseEnvironment,
            List<MavenProject> reactorProjects)
            throws ReleaseExecutionException, ReleaseFailureException {
        ReleaseResult releaseResult = new ReleaseResult();

        validateConfiguration(releaseDescriptor);

        logInfo(releaseResult, "Removing tag with the label " + releaseDescriptor.getScmReleaseLabel() + " ...");

        ReleaseDescriptor basedirAlignedReleaseDescriptor =
                ReleaseUtil.createBasedirAlignedReleaseDescriptor(releaseDescriptor, reactorProjects);

        ScmRepository repository;
        ScmProvider provider;
        try {
            repository = scmRepositoryConfigurator.getConfiguredRepository(
                    basedirAlignedReleaseDescriptor.getScmSourceUrl(),
                    releaseDescriptor,
                    releaseEnvironment.getSettings());

            repository.getProviderRepository().setPushChanges(releaseDescriptor.isPushChanges());

            repository.getProviderRepository().setWorkItem(releaseDescriptor.getWorkItem());

            provider = scmRepositoryConfigurator.getRepositoryProvider(repository);
        } catch (ScmRepositoryException e) {
            throw new ReleaseScmRepositoryException(e.getMessage(), e.getValidationMessages());
        } catch (NoSuchScmProviderException e) {
            throw new ReleaseExecutionException("Unable to configure SCM repository: " + e.getMessage(), e);
        }

        UntagScmResult untagScmResult;
        try {
            ScmFileSet fileSet = new ScmFileSet(new File(basedirAlignedReleaseDescriptor.getWorkingDirectory()));
            String tagName = releaseDescriptor.getScmReleaseLabel();
            String message = releaseDescriptor.getScmCommentPrefix() + "remove tag " + tagName;
            CommandParameters commandParameters = new CommandParameters();
            commandParameters.setString(CommandParameter.TAG_NAME, tagName);
            commandParameters.setString(CommandParameter.MESSAGE, message);
            if (getLogger().isDebugEnabled()) {
                getLogger().debug("RemoveScmTagPhase :: scmUntagParameters tagName " + tagName);
                getLogger().debug("RemoveScmTagPhase :: scmUntagParameters message " + message);
                getLogger().debug("RemoveScmTagPhase :: fileSet  " + fileSet);
            }
            untagScmResult = provider.untag(repository, fileSet, commandParameters);
        } catch (ScmException e) {
            throw new ReleaseExecutionException(
                    "An error has occurred in the remove tag process: " + e.getMessage(), e);
        }

        if (!untagScmResult.isSuccess()) {
            getLogger()
                    .warn(String.format(
                            "Unable to remove tag%nProvider message: %s%nCommand output: %s",
                            untagScmResult.getProviderMessage(), untagScmResult.getCommandOutput()));
        }

        releaseResult.setResultCode(ReleaseResult.SUCCESS);

        return releaseResult;
    }

    @Override
    public ReleaseResult simulate(
            ReleaseDescriptor releaseDescriptor,
            ReleaseEnvironment releaseEnvironment,
            List<MavenProject> reactorProjects)
            throws ReleaseExecutionException, ReleaseFailureException {
        ReleaseResult releaseResult = new ReleaseResult();

        validateConfiguration(releaseDescriptor);

        logInfo(
                releaseResult,
                "Full run would remove tag with label: '" + releaseDescriptor.getScmReleaseLabel() + "'");

        releaseResult.setResultCode(ReleaseResult.SUCCESS);

        return releaseResult;
    }

    private void validateConfiguration(ReleaseDescriptor releaseDescriptor) throws ReleaseFailureException {
        if (releaseDescriptor.getScmReleaseLabel() == null) {
            throw new ReleaseFailureException("A release label is required for removal");
        }
    }
}
