/**
 * <copyright> Copyright (c) 2008-2009 Jonas Helming, Maximilian Koegel. 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 </copyright>
 */
package org.eclipse.emf.emfstore.client.ui.views.users;

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

import org.eclipse.core.runtime.IAdapterFactory;
import org.eclipse.emf.common.notify.AdapterFactory;
import org.eclipse.emf.ecore.EObject;
import org.eclipse.emf.edit.provider.ComposedAdapterFactory;
import org.eclipse.emf.edit.provider.IItemPropertyDescriptor;
import org.eclipse.emf.edit.provider.IItemPropertySource;
import org.eclipse.emf.edit.provider.ItemPropertyDescriptor.PropertyValueWrapper;
import org.eclipse.emf.edit.ui.provider.AdapterFactoryContentProvider;
import org.eclipse.emf.edit.ui.provider.PropertyDescriptor;
import org.eclipse.emf.edit.ui.provider.PropertySource;
import org.eclipse.emf.emfstore.server.model.accesscontrol.ACOrgUnit;
import org.eclipse.emf.emfstore.server.model.accesscontrol.AccesscontrolPackage;
import org.eclipse.jface.viewers.CellEditor;
import org.eclipse.jface.viewers.DialogCellEditor;
import org.eclipse.jface.viewers.ILabelProvider;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Control;
import org.eclipse.ui.views.properties.IPropertyDescriptor;
import org.eclipse.ui.views.properties.IPropertySource;

/**
 * @author boehlke
 * 
 */
public class PropertySourceAdapterFactory implements IAdapterFactory {

	private class CustomPropertyDescriptor extends PropertyDescriptor {

		private UserUiController controller;

		public CustomPropertyDescriptor(ACOrgUnit object, IItemPropertyDescriptor itemPropertyDescriptor) {
			super(object, itemPropertyDescriptor);
			this.controller = UserUiController.getInstance();
		}

		@Override
		public CellEditor createPropertyEditor(Composite composite) {
			return new DialogCellEditor(composite) {

				@Override
				protected Object openDialogBox(Control cellEditorWindow) {
					return null;
				}
			};
		}
	}

	private class CustomPropertySource extends PropertySource {

		public CustomPropertySource(Object object, IItemPropertySource itemPropertySource) {
			super(object, itemPropertySource);
		}

		@Override
		protected IPropertyDescriptor createPropertyDescriptor(IItemPropertyDescriptor itemPropertyDescriptor) {
			Object object = getEditableValue();
			if (itemPropertyDescriptor.getFeature(object) == AccesscontrolPackage.eINSTANCE.getACOrgUnit_Roles()) {
				return new CustomPropertyDescriptor((ACOrgUnit) object, itemPropertyDescriptor);
			}
			return super.createPropertyDescriptor(itemPropertyDescriptor);
		}

	}

	private class CustomAdapterFactoryContentProvider extends AdapterFactoryContentProvider {

		public CustomAdapterFactoryContentProvider(AdapterFactory adapterFactory) {
			super(adapterFactory);
		}

		@Override
		protected IPropertySource createPropertySource(Object object, IItemPropertySource itemPropertySource) {
			if (object instanceof ACOrgUnit) {
				return new CustomPropertySource(object, itemPropertySource);
			}
			return super.createPropertySource(object, itemPropertySource);
		}

	}

	/**
	 * {@inheritDoc}
	 * 
	 * @see org.eclipse.core.runtime.IAdapterFactory#getAdapter(java.lang.Object, java.lang.Class)
	 */
	public Object getAdapter(Object adaptableObject, Class adapterType) {
		if (adaptableObject instanceof EObject && adapterType == IPropertySource.class) {
			EObject eObject = (EObject) adaptableObject;
			AdapterFactory adapterFactory = new ComposedAdapterFactory(
				ComposedAdapterFactory.Descriptor.Registry.INSTANCE);
			final AdapterFactoryContentProvider contentProvider = new CustomAdapterFactoryContentProvider(
				adapterFactory);
			return new UnwrappingPropertySource(contentProvider.getPropertySource(adaptableObject));
		}
		return null;
	}

	/**
	 * {@inheritDoc}
	 * 
	 * @see org.eclipse.core.runtime.IAdapterFactory#getAdapterList()
	 */
	public Class[] getAdapterList() {
		return new Class[] { IPropertySource.class };
	}

	/**
	 * A property source which unwraps values that are wrapped in an EMF {@link PropertyValueWrapper}
	 * 
	 * @author vainolo
	 * 
	 */
	public class UnwrappingPropertySource implements IPropertySource {
		private IPropertySource source;

		public UnwrappingPropertySource(final IPropertySource source) {
			this.source = source;
		}

		public Object getEditableValue() {
			Object value = source.getEditableValue();
			if (value instanceof PropertyValueWrapper) {
				PropertyValueWrapper wrapper = (PropertyValueWrapper) value;
				return wrapper.getEditableValue(null);
			} else {
				return source.getEditableValue();
			}
		}

		public IPropertyDescriptor[] getPropertyDescriptors() {
			List<IPropertyDescriptor> descriptors = new ArrayList<IPropertyDescriptor>();
			for (IPropertyDescriptor iPropertyDescriptor : source.getPropertyDescriptors()) {
				descriptors.add(new PropertyDescriptorWrapper(iPropertyDescriptor, source.getEditableValue()));
			}
			return descriptors.toArray(new IPropertyDescriptor[0]);
		}

		public Object getPropertyValue(Object id) {
			Object value = source.getPropertyValue(id);
			if (value instanceof PropertyValueWrapper) {
				PropertyValueWrapper wrapper = (PropertyValueWrapper) value;
				return wrapper.getEditableValue(null);
			} else {
				return source.getPropertyValue(id);
			}
		}

		public boolean isPropertySet(Object id) {
			return source.isPropertySet(id);
		}

		public void resetPropertyValue(Object id) {
			source.resetPropertyValue(id);
		}

		public void setPropertyValue(Object id, Object value) {
			source.setPropertyValue(id, value);
		}
	}

	/**
	 * if the property is not editable by the user, returns no property editor
	 * 
	 * @author boehlke
	 * 
	 */
	private static class PropertyDescriptorWrapper implements IPropertyDescriptor {

		private IPropertyDescriptor descriptor;
		private UserUiController controller;
		private Object object;

		public PropertyDescriptorWrapper(IPropertyDescriptor iPropertyDescriptor, Object object) {
			this.descriptor = iPropertyDescriptor;
			this.controller = UserUiController.getInstance();
			this.object = object;
		}

		public CellEditor createPropertyEditor(Composite parent) {
			if (controller.canChangeOrgUnit((ACOrgUnit) this.object)) {
				return descriptor.createPropertyEditor(parent);
			}
			return null;
		}

		public String getCategory() {
			return descriptor.getCategory();
		}

		public String getDescription() {
			return descriptor.getDescription();
		}

		public String getDisplayName() {
			return descriptor.getDisplayName();
		}

		public String[] getFilterFlags() {
			return descriptor.getFilterFlags();
		}

		public Object getHelpContextIds() {
			return descriptor.getHelpContextIds();
		}

		public Object getId() {
			return descriptor.getId();
		}

		public ILabelProvider getLabelProvider() {
			return descriptor.getLabelProvider();
		}

		public boolean isCompatibleWith(IPropertyDescriptor anotherProperty) {
			return descriptor.isCompatibleWith(anotherProperty);
		}

	}
}