/*******************************************************************************
 * Copyright (c) 2008 Red Hat, Inc.
 * Distributed under license by Red Hat, Inc. All rights reserved.
 * This program is 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, Inc. - initial API and implementation
 ******************************************************************************/
package org.jboss.tools.smooks.configuration.actions;

import java.util.Collection;

import org.eclipse.emf.common.command.Command;
import org.eclipse.emf.ecore.EObject;
import org.eclipse.emf.edit.command.CommandParameter;
import org.eclipse.emf.edit.command.CreateChildCommand;
import org.eclipse.emf.edit.domain.AdapterFactoryEditingDomain;
import org.eclipse.emf.edit.domain.EditingDomain;
import org.eclipse.emf.edit.ui.action.CreateChildAction;
import org.eclipse.jface.viewers.ISelection;
import org.eclipse.ui.IEditorPart;
import org.eclipse.ui.IWorkbenchPart;
import org.jboss.tools.smooks.configuration.editors.utils.SmooksUIUtils;
import org.jboss.tools.smooks.model.smooks.AbstractReader;
import org.jboss.tools.smooks.model.smooks.SmooksResourceListType;

/**
 * @author Dart (dpeng@redhat.com)
 * 
 */
public class AddSmooksResourceAction extends CreateChildAction {

	public AddSmooksResourceAction(EditingDomain editingDomain, ISelection selection, Object descriptor) {
		super(editingDomain, selection, descriptor);
		resetActionText();
	}

	public AddSmooksResourceAction(IEditorPart editorPart, ISelection selection, Object descriptor) {
		super(editorPart, selection, descriptor);
		resetActionText();
	}

	public AddSmooksResourceAction(IWorkbenchPart workbenchPart, ISelection selection, Object descriptor) {
		super(workbenchPart, selection, descriptor);
		resetActionText();
	}

	public Object getDescriptor() {
		return descriptor;
	}

	public void setDescriptor(Object descriptor) {
		this.descriptor = descriptor;
	}

	protected boolean canCreateReaderCommand(AbstractReader value, SmooksResourceListType resourceList) {
		return !SmooksUIUtils.hasReaderAlready(value.getClass(), resourceList);
	}

	@Override
	protected Command createActionCommand(EditingDomain editingDomain, Collection<?> collection) {
		if (collection.size() == 1) {
			Object obj = collection.iterator().next();
			SmooksResourceListType listType = null;
			if (obj instanceof EObject) {
				listType = SmooksUIUtils.getSmooks11ResourceListType((EObject) obj);
			}
			if (descriptor != null && descriptor instanceof CommandParameter) {
				CommandParameter parameter = (CommandParameter) descriptor;
				if (parameter.getValue() != null) {
					Object value = AdapterFactoryEditingDomain.unwrap(parameter.getValue());
					if (value instanceof AbstractReader) {
						if (!canCreateReaderCommand((AbstractReader) value, listType)) {
							return CreateChildCommand.create(editingDomain, null,
                                    descriptor, collection);
						}
					}
				}
			}
		}
		return super.createActionCommand(editingDomain, collection);
	}

	protected void resetActionText() {
		if (descriptor instanceof CommandParameter) {
			CommandParameter parameter = (CommandParameter) descriptor;
			if (parameter.getValue() != null) {
				Object value = AdapterFactoryEditingDomain.unwrap(parameter.getValue());
				if (value instanceof AbstractReader) {
					// if(value instanceof JsonReader){
					// setText("JSON Reader");
					// }
					//					
					// if(value instanceof ReaderType){
					// setText("Custome Reader");
					// }
				}
			}
		}
	}
}