/******************************************************************************
 * Copyright (c) 2005 BEA Systems, Inc.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 *
 * Contributors:
 *    Konstantin Komissarchik - initial API and implementation
 ******************************************************************************/

package org.eclipse.jst.common.project.facet;

import org.eclipse.core.resources.IProject;
import org.eclipse.core.resources.IProjectDescription;
import org.eclipse.core.resources.IResource;
import org.eclipse.core.resources.IWorkspace;
import org.eclipse.core.resources.ResourcesPlugin;
import org.eclipse.core.runtime.CoreException;
import org.eclipse.core.runtime.IPath;
import org.eclipse.core.runtime.IProgressMonitor;
import org.eclipse.jdt.core.IClasspathEntry;
import org.eclipse.jdt.core.IJavaProject;
import org.eclipse.jdt.core.JavaCore;
import org.eclipse.wst.common.frameworks.datamodel.IDataModel;
import org.eclipse.wst.common.project.facet.core.IDelegate;
import org.eclipse.wst.common.project.facet.core.IProjectFacetVersion;

/**
 * @author <a href="mailto:kosta@bea.com">Konstantin Komissarchik</a>
 */

public final class JavaFacetInstallDelegate implements IDelegate {

	public void execute(final IProject project, final IProjectFacetVersion fv, final Object cfg, final IProgressMonitor monitor) throws CoreException {
		if (monitor != null) {
			monitor.beginTask("", 1); //$NON-NLS-1$
		}

		try {
			IDataModel model = (IDataModel) cfg;

			// Create the source and the output directories.

			final IWorkspace ws = ResourcesPlugin.getWorkspace();

			final IPath pjpath = project.getFullPath();
			IJavaProject jproject = null;
			if( project.exists()){
				 jproject = JavaCore.create(project);
			}
			
			if( !jproject.exists()){
				String srcFolderName = model.getStringProperty(IJavaFacetInstallDataModelProperties.SOURCE_FOLDER_NAME);
				final IPath srcdir = pjpath.append(srcFolderName);

                if( ! srcdir.equals( pjpath ) )
                {
                    ws.getRoot().getFolder(srcdir).getLocation().toFile().mkdirs();
                }
                
                String outputFolderName = model.getStringProperty(IJavaFacetInstallDataModelProperties.DEFAULT_OUTPUT_FOLDER_NAME);
				final IPath outdir = pjpath.append(outputFolderName); 
	
                if( ! outdir.equals( pjpath ) )
                {
                    ws.getRoot().getFolder(outdir).getLocation().toFile().mkdirs();
                }
                
				project.refreshLocal(IResource.DEPTH_INFINITE, null);
	
				// Add the java nature. This will automatically add the builder.
	
				final IProjectDescription desc = project.getDescription();
				final String[] current = desc.getNatureIds();
				final String[] replacement = new String[current.length + 1];
				System.arraycopy(current, 0, replacement, 0, current.length);
				replacement[current.length] = JavaCore.NATURE_ID;
				desc.setNatureIds(replacement);
				project.setDescription(desc, null);
	
				// Set up the sourcepath and the output directory.
	
				final IJavaProject jproj = JavaCore.create(project);
				final IClasspathEntry[] cp = {JavaCore.newSourceEntry(srcdir)};
	
				jproj.setRawClasspath(cp, outdir, null);
				jproj.save(null, true);
	
				// Setup the classpath.
                
                JavaFacetUtils.resetClasspath( project, null, fv );
			}
            
			// Set the compiler comliance level for the project. Ignore whether
			// this might already be set so at the workspace level in case
			// workspace settings change later or the project is included in a
			// different workspace.
			
			JavaFacetUtils.setCompilerLevel(project, fv);

			if (monitor != null) {
				monitor.worked(1);
			}
		} finally {
			if (monitor != null) {
				monitor.done();
			}
		}
	}

}