/******************************************************************************
 * Copyright (c) 2010, 2008 Oracle
 * 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 implementation and ongoing maintenance
 *    Paul Fullbright - [324111] Need better enablement behavior for WTP library providers
 ******************************************************************************/

package org.eclipse.jst.j2ee.internal.common.classpath;

import java.util.Set;

import org.eclipse.core.resources.IProject;
import org.eclipse.core.runtime.CoreException;
import org.eclipse.core.runtime.IPath;
import org.eclipse.jdt.core.IClasspathAttribute;
import org.eclipse.jdt.core.IClasspathEntry;
import org.eclipse.jdt.core.IJavaProject;
import org.eclipse.jdt.core.JavaCore;
import org.eclipse.jst.common.project.facet.core.libprov.ILibraryProvider;
import org.eclipse.jst.common.project.facet.core.libprov.LibraryProviderFramework;
import org.eclipse.jst.common.project.facet.core.libprov.user.UserLibraryProviderInstallOperationConfig;
import org.eclipse.jst.j2ee.classpathdep.ClasspathDependencyUtil;
import org.eclipse.jst.j2ee.classpathdep.IClasspathDependencyConstants;
import org.eclipse.jst.j2ee.project.facet.IJ2EEFacetConstants;
import org.eclipse.wst.common.project.facet.core.IFacetedProjectBase;
import org.eclipse.wst.common.project.facet.core.IProjectFacet;
import org.eclipse.wst.common.project.facet.core.IProjectFacetVersion;
import org.eclipse.wst.common.project.facet.core.ProjectFacetsManager;
import org.eclipse.wst.common.project.facet.core.events.IFacetedProjectEvent;
import org.eclipse.wst.common.project.facet.core.events.IFacetedProjectListener;

/**
 * @author <a href="mailto:konstantin.komissarchik@oracle.com">Konstantin Komissarchik</a>
 */

@SuppressWarnings( "boxing" )

public class WtpUserLibraryProviderInstallOperationConfig

    extends UserLibraryProviderInstallOperationConfig
    
{
    private static final IProjectFacet WEB_FACET 
        = ProjectFacetsManager.getProjectFacet( IJ2EEFacetConstants.DYNAMIC_WEB );

    private static final String CLASS_NAME 
        = WtpUserLibraryProviderInstallOperationConfig.class.getName();
    
    public static final String PROP_INCLUDE_WITH_APPLICATION_ENABLED 
        = CLASS_NAME + ".INCLUDE_WITH_APPLICATION_ENABLED"; //$NON-NLS-1$

    public static final String PROP_INCLUDE_WITH_APPLICATION_SETTING_ENABLED 
        = CLASS_NAME + ".INCLUDE_WITH_APPLICATION_SETTING_ENABLED"; //$NON-NLS-1$

    private boolean includeWithApplicationEnabled;
    private boolean includeWithApplicationSettingEnabled;
    private IFacetedProjectListener facetedProjectListener;
    
    @Override
    public synchronized void init( final IFacetedProjectBase fproj,
                                   final IProjectFacetVersion fv,
                                   final ILibraryProvider provider )
    {
        super.init( fproj, fv, provider );
        
        this.includeWithApplicationEnabled = hasModuleFacet( fproj );
        
        final IProject project = fproj.getProject();
        
        if( project != null )
        {
            final IProjectFacet f = fv.getProjectFacet();
            
            final ILibraryProvider currentProvider 
                = LibraryProviderFramework.getCurrentProvider( project, f );
            
            if( currentProvider == provider )
            {
                this.includeWithApplicationEnabled = false;
                
                final IJavaProject jproj = JavaCore.create( project );
                
                try
                {
                    for( IClasspathEntry cpe : jproj.getRawClasspath() )
                    {
                        if( cpe.getEntryKind() == IClasspathEntry.CPE_CONTAINER )
                        {
                            final IPath path = cpe.getPath();
                            
                            if( path.segmentCount() >= 2 && path.segment( 0 ).equals( JavaCore.USER_LIBRARY_CONTAINER_ID ) )
                            {
                                for( IClasspathAttribute attr : cpe.getExtraAttributes() )
                                {
                                    if( attr.getName().equals( IClasspathDependencyConstants.CLASSPATH_COMPONENT_DEPENDENCY ) )
                                    {
                                        this.includeWithApplicationEnabled = true;
                                        break;
                                    }
                                }
                            }
                        }
                        
                        if( this.includeWithApplicationEnabled )
                        {
                            break;
                        }
                    }
                }
                catch( CoreException e )
                {
                    throw new RuntimeException( e );
                }
            }
        }
        
        this.includeWithApplicationSettingEnabled 
            = ( this.includeWithApplicationEnabled ) ? true : hasModuleFacet( fproj );
        
        this.facetedProjectListener = new IFacetedProjectListener() 
        {
            public void handleEvent( final IFacetedProjectEvent event ) 
            {
                final boolean moduleFaceted = hasModuleFacet( event.getWorkingCopy() );
                setIncludeWithApplicationEnabled( moduleFaceted );
                setIncludeWithApplicationSettingEnabled( moduleFaceted );
            }
        };
        
        fproj.addListener( this.facetedProjectListener, IFacetedProjectEvent.Type.PROJECT_FACETS_CHANGED );
    }

    public boolean isIncludeWithApplicationEnabled()
    {
        return this.includeWithApplicationEnabled;
    }
    
    public void setIncludeWithApplicationEnabled( final boolean value )
    {
        final boolean oldValue = this.includeWithApplicationEnabled;
        this.includeWithApplicationEnabled = value;
        notifyListeners( PROP_INCLUDE_WITH_APPLICATION_ENABLED, oldValue, this.includeWithApplicationEnabled );
    }

    public boolean isIncludeWithApplicationSettingEnabled()
    {
        return this.includeWithApplicationSettingEnabled;
    }
    
    public void setIncludeWithApplicationSettingEnabled( final boolean value )
    {
        final boolean oldValue = this.includeWithApplicationSettingEnabled;
        this.includeWithApplicationSettingEnabled = value;
        notifyListeners( PROP_INCLUDE_WITH_APPLICATION_SETTING_ENABLED, oldValue, this.includeWithApplicationSettingEnabled );
    }

    public IClasspathAttribute[] getClasspathAttributes()
    {
        final IFacetedProjectBase fproj = getFacetedProject();
        final boolean isWebProject = fproj.hasProjectFacet( WEB_FACET );
        
        IClasspathAttribute attr = null;
        
        if ( isIncludeWithApplicationSettingEnabled() )
        {
            if( isIncludeWithApplicationEnabled() )
            {
                attr = JavaCore.newClasspathAttribute( IClasspathDependencyConstants.CLASSPATH_COMPONENT_DEPENDENCY,
                                                       ClasspathDependencyUtil.getDefaultRuntimePath( isWebProject ).toString() );
            }
            else
            {
                attr = JavaCore.newClasspathAttribute( IClasspathDependencyConstants.CLASSPATH_COMPONENT_NON_DEPENDENCY, "" ); //$NON-NLS-1$
            }
        }
        
        return ( attr == null ? null : new IClasspathAttribute[] { attr } );
    }
    
    private static boolean hasModuleFacet( final IFacetedProjectBase fproj ) 
    {
        final Set<IProjectFacetVersion> moduleFacets = ProjectFacetsManager.getGroup( "modules" ).getMembers(); //$NON-NLS-1$
        
        for( IProjectFacetVersion facetVersion : fproj.getProjectFacets() ) 
        {
            if( moduleFacets.contains( facetVersion ) )
            {
                return true;
            }
        }
        
        return false;
    }
    
    @Override
    public void dispose()
    {
        super.dispose();
        getFacetedProject().removeListener( this.facetedProjectListener );
    }
    
}