/*******************************************************************************
 * Copyright (c) 2004-2011 Abel Hegedus and Daniel Varro
 * 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:
 *    Abel Hegedus - initial API and implementation
 *******************************************************************************/
package org.eclipse.viatra2.core.tracebased;

import org.eclipse.viatra2.core.EDeleteSemantics;
import org.eclipse.viatra2.core.IEntity;
import org.eclipse.viatra2.core.IModelElement;
import org.eclipse.viatra2.core.IModelManager;
import org.eclipse.viatra2.core.IRelation;
import org.eclipse.viatra2.core.notification.ICoreNotificationObject;
import org.eclipse.viatra2.core.notification.ICoreNotificationObjectCreateEntity;
import org.eclipse.viatra2.core.notification.ICoreNotificationObjectCreateInstanceOf;
import org.eclipse.viatra2.core.notification.ICoreNotificationObjectCreateRelation;
import org.eclipse.viatra2.core.notification.ICoreNotificationObjectCreateSupertypeOf;
import org.eclipse.viatra2.core.notification.ICoreNotificationObjectDeleteContainment;
import org.eclipse.viatra2.core.notification.ICoreNotificationObjectDeleteEntity;
import org.eclipse.viatra2.core.notification.ICoreNotificationObjectDeleteInstanceOf;
import org.eclipse.viatra2.core.notification.ICoreNotificationObjectDeleteRelation;
import org.eclipse.viatra2.core.notification.ICoreNotificationObjectDeleteSupertypeOf;
import org.eclipse.viatra2.core.notification.ICoreNotificationObjectMoveTo;
import org.eclipse.viatra2.core.notification.ICoreNotificationObjectSetName;
import org.eclipse.viatra2.core.notification.ICoreNotificationObjectSetRelationFrom;
import org.eclipse.viatra2.core.notification.ICoreNotificationObjectSetRelationTo;
import org.eclipse.viatra2.core.notification.ICoreNotificationObjectSetValue;
import org.eclipse.viatra2.core.notification.ICoreNotificationObjectSetViewInfo;
import org.eclipse.viatra2.core.notification.NotificationType;
import org.eclipse.viatra2.core.simple.SimpleEntity;
import org.eclipse.viatra2.core.simple.SimpleModelElement;
import org.eclipse.viatra2.core.simple.SimpleRelation;
import org.eclipse.viatra2.errors.VPMCoreException;
import org.eclipse.viatra2.errors.VPMCoreNullParameterException;
import org.eclipse.viatra2.framework.IFramework;
import org.eclipse.viatra2.logger.Logger;

/**
 * @author Abel Hegedus
 *
 */
public class TraceNotificationProcessor {

	private TraceModelManager mManager;
	private Logger logger;
	/**
	 * 
	 */
	public TraceNotificationProcessor(TraceTreeManager manager, IFramework fw, IModelManager mManager) {
		this.mManager = (TraceModelManager) mManager;
		logger = fw.getLogger();
		
	}
	
	public boolean doExecuteEvent(ICoreNotificationObject note) throws TraceException{
		// based on the event type and contents, manipulate the model		
		try{
			NotificationType action = note.getActionTypeEnum();
	
			switch(action){
			
			case ACTION_ATOMIC_STEP_READY:
				return false;
			case ACTION_CREATE_ENTITY:
				ICoreNotificationObjectCreateEntity _note = (ICoreNotificationObjectCreateEntity) note;
				IEntity ent = _note.getCreated();
				mManager.undoCreateEntity((SimpleEntity)ent, (SimpleEntity)_note.getContainer());
				mManager.undoCreateContainment((SimpleEntity) _note.getContainer(), (SimpleEntity) ent);
				return true;
			case ACTION_DELETE_ENTITY:
				ICoreNotificationObjectDeleteEntity _note1 = (ICoreNotificationObjectDeleteEntity) note;
				IEntity ent1 = _note1.getDeleted();
				mManager.deleteEntity(ent1, EDeleteSemantics.DELETE_SEMANTICS_FORCE);
				return true;
			case ACTION_CREATE_RELATION:
				ICoreNotificationObjectCreateRelation _note2 = (ICoreNotificationObjectCreateRelation) note;
				IRelation rel = _note2.getNewRelation();
				mManager.undoCreateRelation((SimpleRelation) rel,
						(SimpleModelElement) _note2.getFrom(),
						(SimpleModelElement) _note2.getTo());
				return true;
			case ACTION_DELETE_RELATION:
				ICoreNotificationObjectDeleteRelation _note3 = (ICoreNotificationObjectDeleteRelation) note;
				mManager.deleteRelation(_note3.getDeleted(), EDeleteSemantics.DELETE_SEMANTICS_FORCE);
				return true;
			case ACTION_CREATE_INSTANCEOF:
				ICoreNotificationObjectCreateInstanceOf _note4 = (ICoreNotificationObjectCreateInstanceOf) note;
				SimpleModelElement sup = (SimpleModelElement) _note4.getType();
				SimpleModelElement sub = (SimpleModelElement) _note4.getInstance();
				mManager.newInstanceOfEditor(sup, sub);
				return true;
			case ACTION_DELETE_INSTANCEOF:
				ICoreNotificationObjectDeleteInstanceOf _note5 = (ICoreNotificationObjectDeleteInstanceOf) note;
				sup = (SimpleModelElement) _note5.getType();
				sub = (SimpleModelElement) _note5.getInstance();
				mManager.deleteInstanceOfEditor(sup, sub);
				return true;
			case ACTION_CREATE_SUPERTYPEOF:
				ICoreNotificationObjectCreateSupertypeOf _note6 = (ICoreNotificationObjectCreateSupertypeOf) note;
				sup = (SimpleModelElement) _note6.getSuper();
				sub = (SimpleModelElement) _note6.getSub();
				mManager.newSupertypeOfEditor(sup, sub);
				return true;
			case ACTION_DELETE_SUPERTYPEOF:
				ICoreNotificationObjectDeleteSupertypeOf _note7 = (ICoreNotificationObjectDeleteSupertypeOf) note;
				sup = (SimpleModelElement) _note7.getSuper();
				sub = (SimpleModelElement) _note7.getSub();
				mManager.deleteSupertypeOfEditor(sup, sub);
				return true;
			case ACTION_DELETE_CONTAINMENT:
//				ICoreNotificationObjectDeleteContainment _note8 = (ICoreNotificationObjectDeleteContainment) note;
//				SimpleEntity container = (SimpleEntity) _note8.getParent();
//				SimpleEntity child = (SimpleEntity) _note8.getChild();
//				mManager.undoCreateContainment(container, child);
				// FIXME only called from delete entity, we can ignore it
				return false;
			case ACTION_MOVE_ELEMENT_TO:
				ICoreNotificationObjectMoveTo _note11 = (ICoreNotificationObjectMoveTo) note;
				ent = (SimpleEntity) _note11.getElement();
				SimpleEntity to = (SimpleEntity) _note11.getNewContainer();
				mManager.moveEntityTo(ent, to);
				return true;
			case ACTION_SET_VALUE:
				ICoreNotificationObjectSetValue _note9 = (ICoreNotificationObjectSetValue) note;
				ent = (SimpleEntity) _note9.getEntity();
				String newValue = _note9.getNewValue();
				mManager.setValue(ent, newValue);
				return true;
			case ACTION_SET_NAME:
				ICoreNotificationObjectSetName _note10 = (ICoreNotificationObjectSetName) note;
				SimpleModelElement elem = (SimpleModelElement) _note10.getElement();
				String newName = _note10.getNewName();
				mManager.setName(elem, newName);
				return true;
			case ACTION_SET_RELATION_FROM:
				ICoreNotificationObjectSetRelationFrom _note12 = (ICoreNotificationObjectSetRelationFrom) note;
				rel = (SimpleRelation) _note12.getRelation();
				SimpleModelElement newFrom = (SimpleModelElement) _note12
				.getNewFrom();
				mManager.setRelationFrom(rel, newFrom);
				return true;
			case ACTION_SET_RELATION_TO:
				ICoreNotificationObjectSetRelationTo _note13 = (ICoreNotificationObjectSetRelationTo) note;
				rel = (SimpleRelation) _note13.getRelation();
				SimpleModelElement newTo = (SimpleModelElement) _note13.getNewTo();
				mManager.setRelationTo(rel, newTo);
				return true;
			case ACTION_SET_VIEW_INFO:
				ICoreNotificationObjectSetViewInfo _note14 = (ICoreNotificationObjectSetViewInfo) note;
				mManager.setViewInfo(_note14.getElement(), _note14.getNewViewInfo());
				return true;
			case USER_MARK:
				return false;
			}
		}catch (VPMCoreNullParameterException e) {
			logger.fatal("Error performing doExecute; [VPMNullParameterException] message: "
					+ e.getMessage());
		} catch (VPMCoreException e) {
			throw (TraceException) new TraceException("Error performing doExecute; [VPMCoreException] message: "
					+ e.getMessage()).fillInStackTrace();
		}
		/*
		 * Added a comment to this code to stop the undo manager from throwing unnecessary error messages
		 * which slowes down undo operations.
		 throw new VPMCoreRuntimeException("undo step not defined for step:"
				+ note.toString());
		*/
		//logger.warning("undo step not defined for step:"+ note.toString());
		return false;
	}
	
	public boolean undoEvent(ICoreNotificationObject note) throws TraceException{
		// based on the event type and contents, reverse the model manipulation (see undo manager)	
		try{
			NotificationType action = note.getActionTypeEnum();
	
			switch(action){
			
			case ACTION_ATOMIC_STEP_READY:
				return false;
			case ACTION_CREATE_ENTITY:
				ICoreNotificationObjectCreateEntity _note = (ICoreNotificationObjectCreateEntity) note;
				IEntity ent = _note.getCreated();
				mManager
					.deleteEntity(ent, EDeleteSemantics.DELETE_SEMANTICS_FORCE);
				return true;
			case ACTION_DELETE_ENTITY:
				ICoreNotificationObjectDeleteEntity _note1 = (ICoreNotificationObjectDeleteEntity) note;
				IEntity ent1 = _note1.getDeleted();
				IEntity parent = _note1.getParent();
				mManager
				.undoCreateEntity((SimpleEntity) ent1, (SimpleEntity) parent);
				return true;
			case ACTION_CREATE_RELATION:
				ICoreNotificationObjectCreateRelation _note2 = (ICoreNotificationObjectCreateRelation) note;
				IRelation rel = _note2.getNewRelation();
				mManager.deleteRelation(rel,
						EDeleteSemantics.DELETE_SEMANTICS_FORCE);
				return true;
			case ACTION_DELETE_RELATION:
				ICoreNotificationObjectDeleteRelation _note3 = (ICoreNotificationObjectDeleteRelation) note;
				mManager.undoCreateRelation((SimpleRelation) _note3.getDeleted(),
						(SimpleModelElement) _note3.getFrom(),
						(SimpleModelElement) _note3.getTo());
				return true;
			case ACTION_CREATE_INSTANCEOF:
				ICoreNotificationObjectCreateInstanceOf _note4 = (ICoreNotificationObjectCreateInstanceOf) note;
				SimpleModelElement sup = (SimpleModelElement) _note4.getType();
				SimpleModelElement sub = (SimpleModelElement) _note4.getInstance();
				mManager.deleteInstanceOfEditor(sup, sub);
				return true;
			case ACTION_DELETE_INSTANCEOF:
				ICoreNotificationObjectDeleteInstanceOf _note5 = (ICoreNotificationObjectDeleteInstanceOf) note;
				sup = (SimpleModelElement) _note5.getType();
				sub = (SimpleModelElement) _note5.getInstance();
				mManager.newInstanceOfEditor(sup, sub);
				return true;
			case ACTION_CREATE_SUPERTYPEOF:
				ICoreNotificationObjectCreateSupertypeOf _note6 = (ICoreNotificationObjectCreateSupertypeOf) note;
				sup = (SimpleModelElement) _note6.getSuper();
				sub = (SimpleModelElement) _note6.getSub();
				mManager.deleteSupertypeOfEditor(sup, sub);
				return true;
			case ACTION_DELETE_SUPERTYPEOF:
				ICoreNotificationObjectDeleteSupertypeOf _note7 = (ICoreNotificationObjectDeleteSupertypeOf) note;
				sup = (SimpleModelElement) _note7.getSuper();
				sub = (SimpleModelElement) _note7.getSub();
				mManager.newSupertypeOfEditor(sup, sub);
				return true;
			case ACTION_DELETE_CONTAINMENT:
				ICoreNotificationObjectDeleteContainment _note8 = (ICoreNotificationObjectDeleteContainment) note;
				
				SimpleEntity container = (SimpleEntity) _note8.getParent();
				SimpleEntity child = (SimpleEntity) _note8.getChild();
				mManager.undoCreateContainment(container, child);
				return true;
			case ACTION_SET_VALUE:
				ICoreNotificationObjectSetValue _note9 = (ICoreNotificationObjectSetValue) note;
				ent = (SimpleEntity) _note9.getEntity();
				String oldValue = _note9.getOldValue();
				mManager.setValue(ent, oldValue);
				return true;
			case ACTION_SET_NAME:
				ICoreNotificationObjectSetName _note10 = (ICoreNotificationObjectSetName) note;
				SimpleModelElement elem = (SimpleModelElement) _note10.getElement();
				String oldName = _note10.getOldName();
				mManager.setName(elem, oldName);
				return true;
			case ACTION_MOVE_ELEMENT_TO:
				ICoreNotificationObjectMoveTo _note11 = (ICoreNotificationObjectMoveTo) note;
				ent = (SimpleEntity) _note11.getElement();
				SimpleEntity from = (SimpleEntity) _note11.getOldContainer();
				mManager.moveEntityTo(ent, from);
				return true;
			case ACTION_SET_RELATION_FROM:
				ICoreNotificationObjectSetRelationFrom _note12 = (ICoreNotificationObjectSetRelationFrom) note;
				rel = (SimpleRelation) _note12.getRelation();
				SimpleModelElement oldFrom = (SimpleModelElement) _note12
				.getOldFrom();
				mManager.setRelationFrom(rel, oldFrom);
				return true;
			case ACTION_SET_RELATION_TO:
				ICoreNotificationObjectSetRelationTo _note13 = (ICoreNotificationObjectSetRelationTo) note;
				rel = (SimpleRelation) _note13.getRelation();
				SimpleModelElement oldTo = (SimpleModelElement) _note13.getOldTo();
				mManager.setRelationTo(rel, oldTo);
				return true;
			case ACTION_SET_VIEW_INFO:
				undoSetViewInfo((ICoreNotificationObjectSetViewInfo) note);
				return true;
			case USER_MARK:
				return false;
			}
		}catch (VPMCoreNullParameterException e) {
			logger.fatal("Error performing undo; [VPMNullParameterException] message: "
					+ e.getMessage());
		} catch (VPMCoreException e) {
			throw (TraceException) new TraceException("Error performing undo; [VPMCoreException] message: "
					+ e.getMessage()).fillInStackTrace();
		} catch (Exception e) {
			e.printStackTrace();
		}
		/*
		 * Added a comment to this code to stop the undo manager from throwing unnecessary error messages
		 * which slowes down undo operations.
		 throw new VPMCoreRuntimeException("undo step not defined for step:"
				+ note.toString());
		*/
		//logger.warning("undo step not defined for step:"+ note.toString());
		return false;
	}
	
	void undoSetViewInfo(ICoreNotificationObjectSetViewInfo note) {
		IModelElement me = note.getElement();
		String oldViewInfo = note.getOldViewInfo();
		try {
			mManager.setViewInfo(me, oldViewInfo);
		} catch (VPMCoreException e) {
			logger.fatal("Error performing undo; message: " + e.getMessage());
			// e.printStackTrace();
		}
	}
}