package org.apache.maven.lifecycle.internal;

/*
 * 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.
 */

import org.apache.maven.plugin.MojoExecution;
import org.apache.maven.project.MavenProject;

/**
 * @since 3.0
 * @author Benjamin Bentmann
 * @author Kristian Rosenvold
 *         <p/>
 *         NOTE: This class is not part of any public api and can be changed or deleted without prior notice.
 */
public class PhaseRecorder
{
    private String lastLifecyclePhase;

    private final MavenProject project;

    public PhaseRecorder( MavenProject project )
    {
        this.project = project;
    }

    public void observeExecution( MojoExecution mojoExecution )
    {
        String lifecyclePhase = mojoExecution.getLifecyclePhase();

        if ( lifecyclePhase != null )
        {
            if ( lastLifecyclePhase == null )
            {
                lastLifecyclePhase = lifecyclePhase;
            }
            else if ( !lifecyclePhase.equals( lastLifecyclePhase ) )
            {
                project.addLifecyclePhase( lastLifecyclePhase );
                lastLifecyclePhase = lifecyclePhase;
            }
        }

        if ( lastLifecyclePhase != null )
        {
            project.addLifecyclePhase( lastLifecyclePhase );
        }
    }

    public boolean isDifferentPhase( MojoExecution nextMojoExecution )
    {
        String lifecyclePhase = nextMojoExecution.getLifecyclePhase();
        if ( lifecyclePhase == null )
        {
            return lastLifecyclePhase != null;
        }
        return !lifecyclePhase.equals( lastLifecyclePhase );

    }


}
