package org.apache.maven.continuum.web.action;

/*
 * 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 com.opensymphony.webwork.ServletActionContext;
import com.opensymphony.webwork.views.util.UrlHelper;
import org.apache.maven.continuum.ContinuumException;
import org.apache.maven.continuum.model.project.Project;
import org.apache.maven.continuum.web.exception.AuthorizationRequiredException;
import org.apache.maven.continuum.web.util.WorkingCopyContentGenerator;
import org.codehaus.plexus.util.StringUtils;

import javax.activation.MimetypesFileTypeMap;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.InputStream;
import java.util.HashMap;
import java.util.List;

/**
 * @author <a href="mailto:evenisse@apache.org">Emmanuel Venisse</a>
 * @version $Id$
 * @plexus.component role="com.opensymphony.xwork.Action" role-hint="workingCopy"
 */
public class WorkingCopyAction
    extends ContinuumActionSupport
{
    /**
     * @plexus.requirement
     */
    private WorkingCopyContentGenerator generator;

    private Project project;

    private int projectId;

    private String userDirectory;

    private String currentFile;

    private String currentFileContent;

    private String output;

    private String projectName;

    private File downloadFile;

    private String mimeType = "application/octet-stream";

    private static String FILE_SEPARATOR = System.getProperty( "file.separator" );

    private String projectGroupName = "";

    public String execute()
        throws ContinuumException
    {
        try
        {
            checkViewProjectGroupAuthorization( getProjectGroupName() );
        }
        catch ( AuthorizationRequiredException e )
        {
            return REQUIRES_AUTHORIZATION;
        }
        
        if ( "release.properties".equals( currentFile ) )
        {
            throw new ContinuumException( "release.properties is not accessible." );
        }

        List<File> files = getContinuum().getFiles( projectId, userDirectory );

        project = getContinuum().getProject( projectId );

        projectName = project.getName();

        HashMap params = new HashMap();

        params.put( "projectId", new Integer( projectId ) );

        params.put( "projectName", projectName );

        String baseUrl = UrlHelper.buildUrl( "/workingCopy.action", ServletActionContext.getRequest(),
                                             ServletActionContext.getResponse(), params );

        String imagesBaseUrl = UrlHelper.buildUrl( "/images/", ServletActionContext.getRequest(),
                                                   ServletActionContext.getResponse(), params );

        imagesBaseUrl = imagesBaseUrl.substring( 0, imagesBaseUrl.indexOf( "/images/" ) + "/images/".length() );

        output = generator.generate( files, baseUrl, imagesBaseUrl, getContinuum().getWorkingDirectory( projectId ) );

        if ( currentFile != null && !currentFile.equals( "" ) )
        {
            String dir;

            //TODO: maybe create a plexus component for this so that additional mimetypes can be easily added
            MimetypesFileTypeMap mimeTypesMap = new MimetypesFileTypeMap();
            mimeTypesMap.addMimeTypes( "application/java-archive jar war ear" );
            mimeTypesMap.addMimeTypes( "application/java-class class" );
            mimeTypesMap.addMimeTypes( "image/png png" );

            if ( FILE_SEPARATOR.equals( userDirectory ) )
            {
                dir = userDirectory;
            }
            else
            {
                dir = FILE_SEPARATOR + userDirectory + FILE_SEPARATOR;
            }

            downloadFile = new File( getContinuum().getWorkingDirectory( projectId ) + dir + currentFile );
            mimeType = mimeTypesMap.getContentType( downloadFile );

            if ( ( mimeType.indexOf( "image" ) >= 0 ) || ( mimeType.indexOf( "java-archive" ) >= 0 ) ||
                ( mimeType.indexOf( "java-class" ) >= 0 ) || ( downloadFile.length() > 100000 ) )
            {
                return "stream";
            }

            currentFileContent = getContinuum().getFileContent( projectId, userDirectory, currentFile );
        }
        else
        {
            currentFileContent = "";
        }

        return SUCCESS;
    }

    public int getProjectId()
    {
        return projectId;
    }

    public void setProjectId( int projectId )
    {
        this.projectId = projectId;
    }

    public String getProjectName()
    {
        return projectName;
    }

    public String getUserDirectory()
    {
        return userDirectory;
    }

    public void setUserDirectory( String userDirectory )
    {
        this.userDirectory = userDirectory;
    }

    public void setFile( String currentFile )
    {
        this.currentFile = currentFile;
    }
    
    public String getFile()
    {
        return currentFile;
    }

    public String getOutput()
    {
        return output;
    }

    public String getFileContent()
    {
        return currentFileContent;
    }


    public InputStream getInputStream()
        throws ContinuumException
    {
        FileInputStream fis;
        try
        {
            fis = new FileInputStream( downloadFile );
        }
        catch ( FileNotFoundException fne )
        {
            throw new ContinuumException( "Error accessing file.", fne );
        }

        return fis;
    }

    public String getFileLength()
    {
        return Long.toString( downloadFile.length() );
    }

    public String getDownloadFilename()
    {
        return downloadFile.getName();
    }

    public String getMimeType()
    {
        return this.mimeType;
    }

    public Project getProject()
    {
        return project;
    }

    public String getProjectGroupName()
        throws ContinuumException
    {
        if ( StringUtils.isEmpty( projectGroupName ) )
        {
            projectGroupName = getContinuum().getProjectGroupByProjectId( projectId ).getName();
        }

        return projectGroupName;
    }
}