/**
 * Copyright (c) 2010-2012 ISBAN S.L
 * 
 * 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:
 * 		Ruben De Dios (ISBAN S.L)
 * 		Andrez Alvarez Mattos (ISBAN S.L)
 */
package org.eclipse.gmf.tooling.simplemap.model.triggers.mapping;

import org.eclipse.emf.ecore.EAttribute;
import org.eclipse.emf.ecore.EClass;
import org.eclipse.emf.ecore.EcorePackage;
import org.eclipse.emf.transaction.TransactionalEditingDomain;
import org.eclipse.gmf.gmfgraph.ChildAccess;
import org.eclipse.gmf.gmfgraph.DiagramLabel;
import org.eclipse.gmf.gmfgraph.FigureDescriptor;
import org.eclipse.gmf.gmfgraph.Label;
import org.eclipse.gmf.gmfgraph.Node;
import org.eclipse.gmf.gmfgraph.RealFigure;
import org.eclipse.gmf.mappings.FeatureLabelMapping;
import org.eclipse.gmf.mappings.LabelMapping;
import org.eclipse.gmf.mappings.NodeMapping;
import org.eclipse.gmf.tooldef.AbstractTool;
import org.eclipse.gmf.tooling.simplemap.model.triggers.AbstractTrigger;

class SetDomainMetaElementTrigger extends AbstractTrigger {

	private EClass newElement;

	private NodeMapping nodeMapping;

	public SetDomainMetaElementTrigger(TransactionalEditingDomain domain, NodeMapping nodeMapping, EClass newElement) {
		super(domain);

		this.newElement = newElement;
		this.nodeMapping = nodeMapping;
	}

	@Override
	public void executeTrigger() {

		String newElementName = newElement != null ? newElement.getName() : "";

		updateMapping();
		updateCanvas(newElementName);
	}

	private void updateMapping() {
		EAttribute defaultLabelAttribute = getDefaultLabelAttribute();
		FeatureLabelMapping defaultFeatureLabelMapping = getDefaultFeatureLabelMapping();

		if (defaultFeatureLabelMapping != null && defaultLabelAttribute != null)
			defaultFeatureLabelMapping.getFeatures().add(defaultLabelAttribute);
	}

	/**
	 * We search for a candidate to be the Label Attribute
	 * We choose the first String attribute
	 * TODO we can use a string pattern algorithm (i.e Search for "name" attributes) 
	 * @return
	 */
	private EAttribute getDefaultLabelAttribute() {
		if (newElement != null)
			for (EAttribute attribute : newElement.getEAllAttributes()) {
				Class<?> attributeInstanceClass = attribute.getEType().getInstanceClass();
				Class<?> stringInstanceClass = EcorePackage.eINSTANCE.getEString().getInstanceClass();
				if (attributeInstanceClass != null && stringInstanceClass.isAssignableFrom(attributeInstanceClass))
					return attribute;
			}

		return null;
	}

	private FeatureLabelMapping getDefaultFeatureLabelMapping() {
		for (LabelMapping labelMapping : nodeMapping.getLabelMappings())
			if (labelMapping instanceof FeatureLabelMapping)
				return (FeatureLabelMapping) labelMapping;

		return null;
	}

	private void updateCanvas(String newElementName) {

		DiagramLabel diagramLabelToRename = null;

		//Devolvemos el primer label definido
		if (!nodeMapping.getLabelMappings().isEmpty())
			diagramLabelToRename = nodeMapping.getLabelMappings().get(0).getDiagramLabel();

		Node nodeToRename = nodeMapping.getDiagramNode();
		AbstractTool toolToRename = nodeMapping.getTool();

		//Node Name
		if (nodeToRename != null && canRename(nodeToRename)) {
			String newNodeName = getNewCanvasElementName(newElementName, nodeToRename);
			nodeToRename.setName(newNodeName);

			renameNode(nodeToRename, newElementName);
		}

		//Tool Name
		if (toolToRename != null && canRename(toolToRename)) {
			String newToolName = getNewToolName(newElementName, toolToRename);
			toolToRename.setTitle(newToolName);
			toolToRename.setDescription("Create new " + newElementName);
		}

		//Label Mapping Name
		String newDiagramLabelName = newElementName + "Name";

		if (diagramLabelToRename != null && canRename(diagramLabelToRename)) {
			String newLabelName = getNewCanvasElementName(newDiagramLabelName, diagramLabelToRename);
			diagramLabelToRename.setName(newLabelName);

			renameNode(diagramLabelToRename, newElementName);
		}

	}

	private void renameNode(Node nodeToRename, String newElementName) {
		String newFigureName = newElementName + "Figure";

		//Figure Descriptor Name
		FigureDescriptor figDesc = nodeToRename.getFigure();

		String newFigDescName = getNewCanvasElementName(newFigureName, figDesc);

		figDesc.setName(newFigDescName);

		//Figure Name
		if (figDesc.getActualFigure() instanceof RealFigure)
			((RealFigure) figDesc.getActualFigure()).setName(newFigDescName);

		if (nodeToRename instanceof DiagramLabel) {
			ChildAccess labelAccessor = ((DiagramLabel) nodeToRename).getAccessor();

			if (labelAccessor != null && labelAccessor.getFigure() instanceof Label) {
				//Label and Label Accessor Name
				String newLabelName = newElementName + "NameFigure";
				String newLabelAccessorName = "getFigure" + newLabelName;

				((Label) labelAccessor.getFigure()).setName(newLabelName);
				labelAccessor.setAccessor(newLabelAccessorName);
			}

		}

	}

}