/*******************************************************************************
 * Copyright (c) 2000-present Liferay, Inc. All rights reserved.
 *
 * This library is free software; you can redistribute it and/or modify it under
 * the terms of the GNU Lesser General Public License as published by the Free
 * Software Foundation; either version 2.1 of the License, or (at your option)
 * any later version.
 *
 * This library is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
 * FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more
 * details.
 *
 * Contributors:
 * 		Gregory Amerson - initial implementation and ongoing maintenance
 *******************************************************************************/

package com.liferay.ide.project.core.facet;

import com.liferay.ide.project.core.ProjectCore;

import java.util.HashSet;
import java.util.Set;

import org.eclipse.core.resources.IFile;
import org.eclipse.core.resources.IProject;
import org.eclipse.core.resources.WorkspaceJob;
import org.eclipse.core.runtime.CoreException;
import org.eclipse.core.runtime.IProgressMonitor;
import org.eclipse.core.runtime.IStatus;
import org.eclipse.core.runtime.Status;
import org.eclipse.core.runtime.jobs.Job;
import org.eclipse.wst.common.project.facet.core.IFacetedProject;
import org.eclipse.wst.common.project.facet.core.IFacetedProject.Action;
import org.eclipse.wst.common.project.facet.core.IFacetedProject.Action.Type;
import org.eclipse.wst.common.project.facet.core.IProjectFacet;
import org.eclipse.wst.common.project.facet.core.events.IFacetedProjectEvent;
import org.eclipse.wst.common.project.facet.core.events.IFacetedProjectListener;
import org.eclipse.wst.common.project.facet.core.events.IProjectFacetActionEvent;

/**
 * @author Gregory Amerson
 */
public class LiferayFacetedProjectListener implements IFacetedProjectListener
{

    final static String JSDT_FACET = "wst.jsdt.web"; //$NON-NLS-1$

    public void handleEvent( IFacetedProjectEvent event )
    {
        if( event.getType() == IFacetedProjectEvent.Type.POST_INSTALL )
        {
            final IProjectFacetActionEvent actionEvent = (IProjectFacetActionEvent) event;

            if( JSDT_FACET.equals( actionEvent.getProjectFacet().getId() ) )
            {
                Job uninstall = new WorkspaceJob( "uninstall jsdt facet" ) //$NON-NLS-1$
                {

                    @Override
                    public IStatus runInWorkspace( IProgressMonitor monitor ) throws CoreException
                    {
                        // first try to remove jsdt from fixed facet list
                        try
                        {
                            IFacetedProject fProject = actionEvent.getProject();

                            Set<IProjectFacet> fixedFacets = fProject.getFixedProjectFacets();

                            Set<IProjectFacet> updatedFacets = new HashSet<IProjectFacet>();

                            for( IProjectFacet f : fixedFacets )
                            {
                                if( !JSDT_FACET.equals( f.getId() ) )
                                {
                                    updatedFacets.add( f );
                                }
                            }

                            fProject.setFixedProjectFacets( updatedFacets );
                        }
                        catch( Exception e )
                        {
                            ProjectCore.logError( "Unable to removed fixed jsdt facet", e ); //$NON-NLS-1$
                        }

                        // next uninstall the jsdt facet
                        try
                        {
                            Set<Action> actions = new HashSet<Action>();

                            Type type = Type.valueOf( "uninstall" ); //$NON-NLS-1$

                            Action uninstallJsdt = new Action( type, actionEvent.getProjectFacetVersion(), null );

                            actions.add( uninstallJsdt );

                            actionEvent.getProject().modify( actions, monitor );

                            // try to remove unneeded jsdt files

                            final IProject project = actionEvent.getProject().getProject();

                            IFile jsdtscope = project.getFile( ".settings/.jsdtscope" ); //$NON-NLS-1$

                            if( jsdtscope.exists() )
                            {
                                jsdtscope.delete( true, monitor );
                            }

                            IFile container = project.getFile( ".settings/org.eclipse.wst.jsdt.ui.superType.container" ); //$NON-NLS-1$

                            if( container.exists() )
                            {
                                container.delete( true, monitor );
                            }

                            IFile name = project.getFile( ".settings/org.eclipse.wst.jsdt.ui.superType.name" ); //$NON-NLS-1$

                            if( name.exists() )
                            {
                                name.delete( true, monitor );
                            }
                        }
                        catch( CoreException e )
                        {
                            ProjectCore.logError( "Unable to uninstall jsdt facet", e ); //$NON-NLS-1$
                        }

                        return Status.OK_STATUS;
                    }
                };

                uninstall.schedule();
            }
        }
    }

}