/* 
 * 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.felix.obr.plugin;


import java.io.BufferedWriter;
import java.io.File;
import java.io.FileWriter;
import java.io.IOException;
import java.io.Writer;
import java.net.URI;

import org.apache.maven.artifact.manager.WagonManager;
import org.apache.maven.artifact.repository.ArtifactRepository;
import org.apache.maven.plugin.AbstractMojo;
import org.apache.maven.plugin.MojoExecutionException;
import org.apache.maven.plugin.MojoFailureException;
import org.apache.maven.project.MavenProject;
import org.apache.maven.settings.Settings;
import org.apache.maven.wagon.ResourceDoesNotExistException;
import org.apache.maven.wagon.TransferFailedException;
import org.apache.maven.wagon.authorization.AuthorizationException;


/**
 * deploy the bundle to a remote site.
 * this goal is used when you compile a project with a pom file
 * @goal deployment
 * @phase deploy
 * @requiresDependencyResolution compile
 * @author <a href="mailto:dev@felix.apache.org">Felix Project Team</a>
 */

public class ObrDeploy extends AbstractMojo
{

    /**
     * setting of maven.
     * 
     * @parameter expression="${settings}"
     * @require
     */
    private Settings m_settings;

    /**
     * name of the repository xml descriptor file.
     * 
     * @parameter expression="${repository-name}" default-value="repository.xml"
     */
    private String m_repositoryName;

    /**
     * The local Maven repository.
     * 
     * @parameter expression="${localRepository}"
     * @required
     */
    private ArtifactRepository m_localRepo;

    /**
     * Project in use.
     * 
     * @parameter expression="${project}"
     * @require
     */
    private MavenProject m_project;

    /**
     * Wagon Manager.
     * @component
     */
    private WagonManager m_wagonManager;

    /**
     * obr file define by the user.
     * 
     * @parameter expression="${ignore-lock}"
     * 
     */
    private boolean m_ignoreLock;

    /**
     * used to store pathfile in local repo.
     */
    private String m_fileInLocalRepo;

    /**
     * Enable/Disable this goal
     * @description If true evrything the goal do nothing, the goal just skip over 
     * @parameter expression="${maven.obr.installToRemoteOBR}" default-value="false"
     */
    private boolean installToRemoteOBR;


    /**
     * main method for this goal.
     * @implements org.apache.maven.plugin.Mojo.execute 
     * @throws MojoExecutionException if the plugin failed
     * @throws MojoFailureException if the plugin failed
     */
    public void execute() throws MojoExecutionException, MojoFailureException
    {
        getLog().info( "Obr-deploy start:" );
        if ( !installToRemoteOBR )
        {
            getLog().info( "maven-obr-plugin:deploy goal is disable due to one of the following reason:" );
            getLog().info( " - 'installToRemoteOBR' configuration set to false" );
            getLog().info( " - JVM property maven.obr.installToRemoteOBR set to false" );
            return;
        }
        ArtifactRepository ar = m_project.getDistributionManagementArtifactRepository();

        // locate the obr.xml file
        URI obrXml = ObrUtils.findObrXml( m_project.getResources() );

        // the obr.xml file is not present
        if ( null == obrXml )
        {
            getLog().info( "obr.xml is not present, use default" );
        }

        File repoDescriptorFile = null;

        // init the wagon connection
        RemoteFileManager remoteFile = new RemoteFileManager( ar, m_wagonManager, m_settings, getLog() );
        remoteFile.connect();

        // create a non-empty file used to lock the repository descriptor file
        File lockFile = null;
        Writer output = null;
        try
        {
            lockFile = File.createTempFile( String.valueOf( System.currentTimeMillis() ), null );
            output = new BufferedWriter( new FileWriter( lockFile ) );
            output.write( "locked" );
            output.close();
        }
        catch ( IOException e )
        {
            getLog().error( "Unable to create temporary file" );
            throw new MojoFailureException( "IOException" );
        }

        if ( m_ignoreLock )
        {
            try
            {
                remoteFile.put( lockFile, m_repositoryName + ".lock" );
            }
            catch ( TransferFailedException e )
            {
                getLog().error( "Transfer failed" );
                e.printStackTrace();
                throw new MojoFailureException( "TransferFailedException" );

            }
            catch ( ResourceDoesNotExistException e )
            {
                throw new MojoFailureException( "ResourceDoesNotExistException" );
            }
            catch ( AuthorizationException e )
            {
                getLog().error( "Authorization failed" );
                e.printStackTrace();
                throw new MojoFailureException( "AuthorizationException" );
            }

        }
        else
        {
            int countError = 0;
            while ( remoteFile.isLockedFile( remoteFile, m_repositoryName ) && countError < 2 )
            {
                countError++;
                getLog().warn( "File is locked, retry in 10s" );
                try
                {
                    Thread.sleep( 10000 );
                }
                catch ( InterruptedException e )
                {
                    getLog().warn( "Sleep interupted" );
                }
            }

            if ( countError == 2 )
            {
                getLog().error(
                    "File: " + m_repositoryName + " is locked. Try -Dignore-lock=true if you want force uploading" );
                throw new MojoFailureException( "fileLocked" );
            }
        }

        // file is not locked, so we lock it now
        try
        {
            remoteFile.put( lockFile, m_repositoryName + ".lock" );
        }
        catch ( TransferFailedException e )
        {
            getLog().error( "Transfer failed" );
            e.printStackTrace();
            throw new MojoFailureException( "TransferFailedException" );

        }
        catch ( ResourceDoesNotExistException e )
        {
            throw new MojoFailureException( "ResourceDoesNotExistException" );
        }
        catch ( AuthorizationException e )
        {
            getLog().error( "Authorization failed" );
            e.printStackTrace();
            throw new MojoFailureException( "AuthorizationException" );
        }

        try
        {
            repoDescriptorFile = remoteFile.get( m_repositoryName );
        }
        catch ( TransferFailedException e )
        {
            getLog().error( "Transfer failed" );
            e.printStackTrace();
            throw new MojoFailureException( "TransferFailedException" );

        }
        catch ( ResourceDoesNotExistException e )
        {
            // file doesn't exist! create a new one
            getLog().warn( "file specified does not exist: " + m_repositoryName );
            getLog().warn( "Create a new repository descriptor file " + m_repositoryName );
            try
            {
                File f = File.createTempFile( String.valueOf( System.currentTimeMillis() ), null );
                repoDescriptorFile = new File( f.getParent() + File.separator
                    + String.valueOf( System.currentTimeMillis() ) + ".xml" );
            }
            catch ( IOException e1 )
            {
                getLog().error( "canno't create temporary file" );
                e1.printStackTrace();
                return;
            }
        }
        catch ( AuthorizationException e )
        {
            getLog().error( "Authorization failed" );
            e.printStackTrace();
            throw new MojoFailureException( "AuthorizationException" );
        }
        catch ( IOException e )
        {
            e.printStackTrace();
            throw new MojoFailureException( "IOException" );
        }

        Config userConfig = new Config();
        userConfig.setPathRelative( true );
        userConfig.setRemotely( true );

        PathFile file = null;

        // get the path to local maven repository
        file = new PathFile( PathFile.uniformSeparator( m_settings.getLocalRepository() ) + File.separator
            + PathFile.uniformSeparator( m_localRepo.pathOf( m_project.getArtifact() ) ) );
        if ( file.isExists() )
        {
            m_fileInLocalRepo = file.getOnlyAbsoluteFilename();
        }
        else
        {
            getLog().error(
                "file not found in local repository: " + m_settings.getLocalRepository() + File.separator
                    + m_localRepo.pathOf( m_project.getArtifact() ) );
            return;
        }

        file = new PathFile( "file:/" + repoDescriptorFile.getAbsolutePath() );

        ObrUpdate obrUpdate = new ObrUpdate( file, obrXml, m_project, m_fileInLocalRepo, PathFile
            .uniformSeparator( m_settings.getLocalRepository() ), userConfig, getLog() );

        obrUpdate.updateRepository();

        // the reposiroty descriptor file is modified, we upload it on the remote repository
        try
        {
            remoteFile.put( repoDescriptorFile, m_repositoryName );
        }
        catch ( TransferFailedException e )
        {
            getLog().error( "Transfer failed" );
            e.printStackTrace();
            throw new MojoFailureException( "TransferFailedException" );
        }
        catch ( ResourceDoesNotExistException e )
        {
            getLog().error( "Resource does not exist:" + repoDescriptorFile.getName() );
            e.printStackTrace();
            throw new MojoFailureException( "ResourceDoesNotExistException" );
        }
        catch ( AuthorizationException e )
        {
            getLog().error( "Authorization failed" );
            e.printStackTrace();
            throw new MojoFailureException( "AuthorizationException" );
        }
        repoDescriptorFile.delete();

        // we remove lockFile activation
        lockFile = null;
        try
        {
            lockFile = File.createTempFile( String.valueOf( System.currentTimeMillis() ), null );
        }
        catch ( IOException e )
        {
            e.printStackTrace();
            throw new MojoFailureException( "IOException" );
        }
        try
        {
            remoteFile.put( lockFile, m_repositoryName + ".lock" );
        }
        catch ( TransferFailedException e )
        {
            getLog().error( "Transfer failed" );
            e.printStackTrace();
            throw new MojoFailureException( "TransferFailedException" );
        }
        catch ( ResourceDoesNotExistException e )
        {
            e.printStackTrace();
            throw new MojoFailureException( "ResourceDoesNotExistException" );
        }
        catch ( AuthorizationException e )
        {
            getLog().error( "Authorization failed" );
            e.printStackTrace();
            throw new MojoFailureException( "AuthorizationException" );
        }

        remoteFile.disconnect();
    }

}