/*******************************************************************************
 * Copyright (c) 2003, 2005 IBM Corporation 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:
 *     IBM Corporation - initial API and implementation
 *******************************************************************************/
/*
 * Created on Sep 2, 2003
 *  
 */
package org.eclipse.jst.j2ee.internal.common.operations;

import java.util.ArrayList;
import java.util.List;
import java.util.Set;

import org.eclipse.core.commands.ExecutionException;
import org.eclipse.core.resources.IFile;
import org.eclipse.core.resources.IProject;
import org.eclipse.core.runtime.CoreException;
import org.eclipse.core.runtime.IAdaptable;
import org.eclipse.core.runtime.IProgressMonitor;
import org.eclipse.core.runtime.IStatus;
import org.eclipse.jdt.core.IClasspathEntry;
import org.eclipse.jdt.core.IJavaProject;
import org.eclipse.jdt.core.JavaCore;
import org.eclipse.jdt.core.JavaModelException;
import org.eclipse.jem.util.emf.workbench.ProjectUtilities;
import org.eclipse.jem.util.logger.proxy.Logger;
import org.eclipse.jem.workbench.utility.JemProjectUtilities;
import org.eclipse.jst.j2ee.internal.common.ClasspathModel;
import org.eclipse.jst.j2ee.internal.plugin.J2EEPlugin;
import org.eclipse.wst.common.frameworks.datamodel.AbstractDataModelOperation;
import org.eclipse.wst.common.frameworks.datamodel.IDataModel;


public class JARDependencyOperation extends AbstractDataModelOperation {
	public JARDependencyOperation(IDataModel dataModel) {
		super(dataModel);
	}

	public IStatus redo(IProgressMonitor monitor, IAdaptable info) throws ExecutionException {
		// TODO Auto-generated method stub
		return null;
	}
	
	public IStatus undo(IProgressMonitor monitor, IAdaptable info) throws ExecutionException {
		// TODO Auto-generated method stub
		return null;
	}
	
//	private void saveModel(ClasspathModel model, IProgressMonitor monitor) throws InvocationTargetException, InterruptedException, CoreException {
//		if (!model.isDirty())
//			return;
//		validateEdit(model);
//		monitor.beginTask("", 2); //$NON-NLS-1$
//		org.eclipse.jst.j2ee.application.internal.operations.UpdateManifestOperation mfOperation = createManifestOperation(model);
//		IHeadlessRunnableWithProgress buildPathOperation = createBuildPathOperation(model);
//		try {
//			mfOperation.execute(new SubProgressMonitor(monitor, 1), null);
//			buildPathOperation.run(new SubProgressMonitor(monitor, 1));
//		} catch (Exception e) {
//			e.printStackTrace();
//		}
//	}

	/**
	 * @param model
	 */
	protected void validateEdit(ClasspathModel aModel) throws CoreException {
		Set affectedFiles = aModel.getAffectedFiles();
		IFile[] files = (IFile[]) affectedFiles.toArray(new IFile[affectedFiles.size()]);
		IStatus result = J2EEPlugin.getWorkspace().validateEdit(files, null);
		if (!result.isOK())
			throw new CoreException(result);
	}

	protected UpdateJavaBuildPathOperation createBuildPathOperation(ClasspathModel aModel) {
		IJavaProject javaProject = JemProjectUtilities.getJavaProject(aModel.getProject());
		return new UpdateJavaBuildPathOperation(javaProject, aModel.getClassPathSelection());
	}

//	private UpdateManifestOperation createManifestOperation(ClasspathModel aModel) {
//		IDataModel updateManifestDataModel = DataModelFactory.createDataModel(UpdateManifestDataModelProvider.class);
//		updateManifestDataModel.setProperty(UpdateManifestDataModelProperties.PROJECT_NAME, aModel.getProject().getName());
//		updateManifestDataModel.setBooleanProperty(UpdateManifestDataModelProperties.MERGE, false);
//		updateManifestDataModel.setProperty(UpdateManifestDataModelProperties.JAR_LIST, UpdateManifestDataModelProvider.convertClasspathStringToList(aModel.getClassPathSelection().toString()));
//		return new UpdateManifestOperation(updateManifestDataModel);
//	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.jst.j2ee.internal.internal.operations.HeadlessJ2EEOperation#execute(org.eclipse.core.runtime.IProgressMonitor)
	 */
//	protected final void execute(IProgressMonitor monitor) throws CoreException, InvocationTargetException, InterruptedException {
//		JARDependencyDataModel dataModel = (JARDependencyDataModel) operationDataModel;
//		ClasspathModel model = new ClasspathModel(null);
//		model.setProject(dataModel.getProject());
//		//model.setSelectedEARNature(EARNatureRuntime.getRuntime(dataModel.getEARProject()));
//		try {
//			int jarManipulationType = dataModel.getIntProperty(JARDependencyDataModel.JAR_MANIPULATION_TYPE);
//			switch (jarManipulationType) {
//				case JARDependencyDataModel.JAR_MANIPULATION_ADD : {
//					List jarList = (List) dataModel.getUpdateManifestDataModel().getProperty(UpdateManifestDataModel.JAR_LIST);
//					if (!jarList.isEmpty()) {
//						for (int i = 0; i < jarList.size(); i++) {
//							String jarName = (String) jarList.get(i);
//							model.selectDependencyIfNecessary(jarName);
//						}
//					} else {
//						model.selectDependencyIfNecessary(dataModel.getReferencedProject());
//					}
//				}
//					break;
//				case JARDependencyDataModel.JAR_MANIPULATION_REMOVE : {
//					List jarList = (List) dataModel.getUpdateManifestDataModel().getProperty(UpdateManifestDataModel.JAR_LIST);
//					for (int i = 0; i < jarList.size(); i++) {
//						String jarName = (String) jarList.get(i);
//						model.removeDependency(jarName);
//					}
//				}
//					break;
//				case JARDependencyDataModel.JAR_MANIPULATION_INVERT :
//					ClassPathSelection classPathSelection = model.getClassPathSelection();
//					if (classPathSelection != null)
//						classPathSelection.invertClientJARSelection(dataModel.getReferencedProject(), dataModel.getOppositeProject());
//					break;
//			}
//			if (model.isDirty())
//				saveModel(model, monitor);
//		} finally {
//			if (model != null)
//				model.dispose();
//			if (monitor != null)
//				monitor.done();
//		}
//	}
	
	public final IStatus execute(IProgressMonitor monitor, IAdaptable adaptable) throws ExecutionException {
		
		IProject proj = ProjectUtilities.getProject(model.getStringProperty(JARDependencyDataModelProperties.PROJECT_NAME));
		IProject refproj = ProjectUtilities.getProject(model.getStringProperty(JARDependencyDataModelProperties.REFERENCED_PROJECT_NAME));

		try {
			int jarManipulationType = model.getIntProperty(JARDependencyDataModelProperties.JAR_MANIPULATION_TYPE);
			switch (jarManipulationType) {
				case JARDependencyDataModelProperties.JAR_MANIPULATION_ADD :
					updateProjectDependency(proj, refproj, true);
					break;
				case JARDependencyDataModelProperties.JAR_MANIPULATION_REMOVE : 
					updateProjectDependency(proj, refproj, false);
					break;
				case JARDependencyDataModelProperties.JAR_MANIPULATION_INVERT :

					break;
			}
		} finally {
			if (monitor != null)
				monitor.done();
		}
		return OK_STATUS;
	}	
	
	private IClasspathEntry[] getProjectDependency(IProject clientProj){
		IClasspathEntry projectEntry = JavaCore.newProjectEntry(clientProj.getFullPath(), true);
			return new IClasspathEntry[]{projectEntry};	
	}	
	
	private void updateProjectDependency(final IProject ejbProj, final IProject clientProj, final boolean add){
		
		final IJavaProject javaProject = JavaCore.create( ejbProj );
		try {
			final IClasspathEntry[] oldEntries = javaProject.getRawClasspath();
			final IClasspathEntry[] entriesToChange = getProjectDependency( clientProj );
			final List classpathEntries = new ArrayList();
			for (int i = 0; i < oldEntries.length; i++) {
				if (!entryToChange(oldEntries[i], entriesToChange)) {
					classpathEntries.add(oldEntries[i]);
				}
			}
			if (add) {
				for( int j=0; j< entriesToChange.length; j++){
					classpathEntries.add(entriesToChange[j]);
				}
			}
			javaProject.setRawClasspath((IClasspathEntry[])classpathEntries.toArray(new IClasspathEntry[classpathEntries.size()]), null);
		}
		catch (JavaModelException e) {
			Logger.getLogger().logError(e);
		}		
	}
	
	private boolean entryToChange(final IClasspathEntry entry, final IClasspathEntry[] entriesToChange) {
		for (int i = 0; i < entriesToChange.length; i++) {
			if (entriesToChange[i].equals(entry)) {
				return true;
			}
		}
		return false;
	}
}