/*******************************************************************************
 * Copyright (c) 2009 Red Hat and others.
 * 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:
 *     Red Hat - Initial API and implementation
 *******************************************************************************/
package org.eclipse.jst.common.internal.modulecore;

import java.util.List;

import org.eclipse.core.runtime.IPath;
import org.eclipse.wst.common.componentcore.internal.flat.AbstractFlattenParticipant;
import org.eclipse.wst.common.componentcore.internal.flat.IFlatResource;
import org.eclipse.wst.common.componentcore.internal.flat.VirtualComponentFlattenUtility;
import org.eclipse.wst.common.componentcore.internal.flat.FlatVirtualComponent.FlatComponentTaskModel;
import org.eclipse.wst.common.componentcore.resources.IVirtualComponent;
import org.eclipse.wst.common.componentcore.resources.IVirtualReference;

/**
 * Copy the classpath LIB references from a child with 
 * a ../ runtime path into a receiving parent.
 * 
 * @author rob
 *
 */
public class AddClasspathLibReferencesParticipant extends AbstractFlattenParticipant {
	private List<IFlatResource> list;
	@Override
	public boolean shouldIgnoreReference(IVirtualComponent rootComponent,
			IVirtualReference referenced, FlatComponentTaskModel dataModel) {
		if( referenced.getRuntimePath().equals(IClasspathDependencyReceiver.RUNTIME_MAPPING_INTO_CONTAINER_PATH))
			return true;
		return false;
	}

	
	@Override
	public void finalize(IVirtualComponent component,
			FlatComponentTaskModel dataModel, List<IFlatResource> resources) {
		this.list = resources;
		if( !(component instanceof IClasspathDependencyReceiver ))
			return;
		if( ((IClasspathDependencyReceiver)component).canReceiveClasspathDependencies())
			addReferencedComponentClasspathDependencies((IClasspathDependencyReceiver)component);
	}

	private void addReferencedComponentClasspathDependencies(final IClasspathDependencyReceiver component) {
		final IVirtualReference[] refs = component.getReferences();
		for (int i = 0; i < refs.length; i++) {
			final IVirtualReference reference = refs[i];
			final IPath runtimePath = reference.getRuntimePath();
			final IVirtualComponent referencedComponent = reference.getReferencedComponent();

			// if the reference cannot export dependencies, skip
			if( !(referencedComponent instanceof IClasspathDependencyProvider) )
				continue;
			
			if (!referencedComponent.isBinary() && referencedComponent instanceof IClasspathDependencyProvider) {
				final IVirtualReference[] cpRefs = ((IClasspathDependencyProvider) referencedComponent).getJavaClasspathReferences();
				for (int j = 0; j < cpRefs.length; j++) {
					final IVirtualReference cpRef = cpRefs[j];
					IPath cpRefRuntimePath = cpRef.getRuntimePath();

					if (cpRef.getReferencedComponent() instanceof IClasspathDependencyComponent) {
						// want to avoid adding dups
						IClasspathDependencyComponent cpComp = (IClasspathDependencyComponent) cpRef.getReferencedComponent();
						// don't want to process class folder refs here
						if (cpComp.isClassFolder())
							continue;

						//if path isn't ../, it shouldn't be added here [bug 247090]
						if( !cpRefRuntimePath.equals(IClasspathDependencyReceiver.RUNTIME_MAPPING_INTO_CONTAINER_PATH))
							continue;
						
						// TODO: verify this cpRefRuntimePath is acceptable?
						//if( !runtimePath.equals(component.getClasspathFolderPath(cpComp))) continue;
						
						cpRefRuntimePath = runtimePath;
						new VirtualComponentFlattenUtility(list, null).addFile(cpComp, cpRefRuntimePath, cpComp);
					}
				}
			}
		}
	}
	
//	private boolean canExportClasspathComponentDependencies(IVirtualComponent component) {
//		final IProject project = component.getProject();
//		// check for valid project type
//		if (JavaEEProjectUtilities.isEJBProject(project) 
//				|| JavaEEProjectUtilities.isDynamicWebProject(project)
//				|| JavaEEProjectUtilities.isJCAProject(project)
//    			|| JavaEEProjectUtilities.isUtilityProject(project)) {
//			return true;
//		}
//		return false;
//	}
}