/*******************************************************************************
 * Copyright (c) 2005, 2007 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
 *******************************************************************************/
package org.eclipse.wst.common.componentcore.internal.operation;

import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;

import org.eclipse.core.commands.ExecutionException;
import org.eclipse.core.resources.IFile;
import org.eclipse.core.resources.IProject;
import org.eclipse.core.resources.ResourcesPlugin;
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.core.runtime.Status;
import org.eclipse.jem.util.UIContextDetermination;
import org.eclipse.jem.util.emf.workbench.ProjectUtilities;
import org.eclipse.wst.common.componentcore.datamodel.properties.IAddReferenceDataModelProperties;
import org.eclipse.wst.common.componentcore.internal.ModulecorePlugin;
import org.eclipse.wst.common.componentcore.internal.StructureEdit;
import org.eclipse.wst.common.componentcore.resources.IVirtualComponent;
import org.eclipse.wst.common.componentcore.resources.IVirtualReference;
import org.eclipse.wst.common.frameworks.datamodel.AbstractDataModelOperation;
import org.eclipse.wst.common.frameworks.datamodel.IDataModel;
import org.eclipse.wst.common.internal.emfworkbench.validateedit.IValidateEditContext;

public class AddReferencesOp extends AbstractDataModelOperation {


	public AddReferencesOp(IDataModel model) {
		super(model);
	}

	public IStatus execute(IProgressMonitor monitor, IAdaptable info) throws ExecutionException {
		if (!validateEdit().isOK())
			return Status.CANCEL_STATUS;
		addReferencedComponents(monitor);
		addProjectReferences();
		return OK_STATUS;
	}
	
	/**
	 * Validate edit for resource state
	 */
	protected IStatus validateEdit() {
		IStatus status = OK_STATUS;
		IValidateEditContext validator = (IValidateEditContext) UIContextDetermination.createInstance(IValidateEditContext.CLASS_KEY);
		IVirtualComponent sourceComp = (IVirtualComponent) model.getProperty(IAddReferenceDataModelProperties.SOURCE_COMPONENT);
		IProject project = sourceComp.getProject();

		if (status.isOK()) {
			StructureEdit sEdit = null;
			try {
				sEdit = StructureEdit.getStructureEditForWrite(project);
				status = validator.validateState(sEdit.getModuleStructuralModel());
			} finally {
				if (sEdit !=null)
					sEdit.dispose();
			}
		}
		
		IFile [] files = new IFile[1];
		files[0] = project.getFile(ProjectUtilities.DOT_PROJECT);
		status = ResourcesPlugin.getWorkspace().validateEdit(files, null);
		return status;
	}
	
	public static List<IVirtualReference> getListFromModel(IDataModel model) {
		Object value = model.getProperty(IAddReferenceDataModelProperties.TARGET_REFERENCE_LIST);
		List<IVirtualReference> modList = value instanceof List ?  (List<IVirtualReference>)value : Arrays.asList(new IVirtualReference[]{(IVirtualReference)value});
		return modList;
	}
	
	protected void addProjectReferences() {

		IVirtualComponent sourceComp = (IVirtualComponent) model.getProperty(IAddReferenceDataModelProperties.SOURCE_COMPONENT);
		List modList = getListFromModel(model);
		List targetprojectList = new ArrayList();
		for (int i = 0; i < modList.size(); i++) {
			IVirtualComponent virtualComponent = ((IVirtualReference) modList.get(i)).getReferencedComponent();
			if(virtualComponent.isBinary()){
				continue;
			}
			IProject targetProject = virtualComponent.getProject();
			targetprojectList.add(targetProject);
		}
		try {
			ProjectUtilities.addReferenceProjects(sourceComp.getProject(), targetprojectList);
		} catch (CoreException e) {
			ModulecorePlugin.logError(e);
		}

	}

	protected void addReferencedComponents(IProgressMonitor monitor) {
		IVirtualComponent sourceComp = (IVirtualComponent) model.getProperty(IAddReferenceDataModelProperties.SOURCE_COMPONENT);
		List<IVirtualReference> refList = getListFromModel(model);
		IVirtualReference[] refs = (IVirtualReference[]) refList.toArray(new IVirtualReference[refList.size()]);
		sourceComp.addReferences(refs);
	}

	public IStatus redo(IProgressMonitor monitor, IAdaptable info) throws ExecutionException {
		return null;
	}

	public IStatus undo(IProgressMonitor monitor, IAdaptable info) throws ExecutionException {
		return null;
	}

}