package org.apache.maven.archiva.scheduled.executors;

/*
 * 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.commons.collections.CollectionUtils;
import org.apache.commons.lang.StringUtils;
import org.apache.maven.archiva.configuration.ArchivaConfiguration;
import org.apache.maven.archiva.configuration.ManagedRepositoryConfiguration;
import org.apache.maven.archiva.database.ArchivaDAO;
import org.apache.maven.archiva.database.ArchivaDatabaseException;
import org.apache.maven.archiva.database.constraints.MostRecentRepositoryScanStatistics;
import org.apache.maven.archiva.model.RepositoryContentStatistics;
import org.apache.maven.archiva.repository.RepositoryException;
import org.apache.maven.archiva.repository.scanner.RepositoryScanStatistics;
import org.apache.maven.archiva.repository.scanner.RepositoryScanner;
import org.apache.maven.archiva.scheduled.tasks.RepositoryTask;
import org.codehaus.plexus.logging.AbstractLogEnabled;
import org.codehaus.plexus.personality.plexus.lifecycle.phase.Initializable;
import org.codehaus.plexus.personality.plexus.lifecycle.phase.InitializationException;
import org.codehaus.plexus.taskqueue.Task;
import org.codehaus.plexus.taskqueue.execution.TaskExecutionException;
import org.codehaus.plexus.taskqueue.execution.TaskExecutor;

import java.util.List;

/**
 * ArchivaRepositoryScanningTaskExecutor 
 *
 * @author <a href="mailto:joakime@apache.org">Joakim Erdfelt</a>
 * @version $Id$
 * 
 * @plexus.component
 *   role="org.codehaus.plexus.taskqueue.execution.TaskExecutor"
 *   role-hint="repository-scanning"
 */
public class ArchivaRepositoryScanningTaskExecutor
    extends AbstractLogEnabled
    implements TaskExecutor, Initializable
{
    /**
     * @plexus.requirement role-hint="jdo"
     */
    private ArchivaDAO dao;
    
    /**
     * @plexus.requirement
     */
    private ArchivaConfiguration archivaConfiguration;

    /**
     * The repository scanner component.
     * 
     * @plexus.requirement
     */
    private RepositoryScanner repoScanner;

    public void initialize()
        throws InitializationException
    {
        getLogger().info( "Initialized " + this.getClass().getName() );
    }

    public void executeTask( Task task )
        throws TaskExecutionException
    {
        RepositoryTask repoTask = (RepositoryTask) task;
        
        if ( StringUtils.isBlank( repoTask.getRepositoryId() ) )
        {
            throw new TaskExecutionException("Unable to execute RepositoryTask with blank repository Id.");
        }

        getLogger().info( "Executing task from queue with job name: " + repoTask.getName() );
        
        try
        {
            ManagedRepositoryConfiguration arepo = archivaConfiguration.getConfiguration().findManagedRepositoryById( repoTask.getRepositoryId() );

            long sinceWhen = RepositoryScanner.FRESH_SCAN;

            List<RepositoryContentStatistics> results = dao.query( new MostRecentRepositoryScanStatistics( arepo.getId() ) );

            if ( CollectionUtils.isNotEmpty( results ) )
            {
                RepositoryContentStatistics lastStats = results.get( 0 );
                sinceWhen = lastStats.getWhenGathered().getTime() + lastStats.getDuration();
            }

            RepositoryScanStatistics stats = repoScanner.scan( arepo, sinceWhen );

            getLogger().info( "Finished repository task: " + stats.toDump( arepo ) );
            
            // I hate jpox and modello
            RepositoryContentStatistics dbstats = new RepositoryContentStatistics();
            dbstats.setDuration( stats.getDuration() );
            dbstats.setNewFileCount( stats.getNewFileCount() );
            dbstats.setRepositoryId( stats.getRepositoryId() );
            dbstats.setTotalFileCount( stats.getTotalFileCount() );
            dbstats.setWhenGathered( stats.getWhenGathered() );
            
            dao.getRepositoryContentStatisticsDAO().saveRepositoryContentStatistics( dbstats );
        }
        catch ( RepositoryException e )
        {
            throw new TaskExecutionException( "Repository error when executing repository job.", e );
        }        
    }
}
