package org.eclipse.bpmn2.modeler.ui.features.label;

import org.eclipse.bpmn2.BaseElement;
import org.eclipse.bpmn2.DataInput;
import org.eclipse.bpmn2.DataObject;
import org.eclipse.bpmn2.DataObjectReference;
import org.eclipse.bpmn2.DataOutput;
import org.eclipse.bpmn2.DataStore;
import org.eclipse.bpmn2.DataStoreReference;
import org.eclipse.bpmn2.Event;
import org.eclipse.bpmn2.Gateway;
import org.eclipse.bpmn2.Message;
import org.eclipse.bpmn2.modeler.core.features.ContextConstants;
import org.eclipse.bpmn2.modeler.core.features.FeatureContainer;
import org.eclipse.bpmn2.modeler.core.features.UpdateBaseElementNameFeature;
import org.eclipse.bpmn2.modeler.core.utils.BusinessObjectUtil;
import org.eclipse.graphiti.features.IAddFeature;
import org.eclipse.graphiti.features.ICreateFeature;
import org.eclipse.graphiti.features.IDeleteFeature;
import org.eclipse.graphiti.features.IDirectEditingFeature;
import org.eclipse.graphiti.features.IFeatureProvider;
import org.eclipse.graphiti.features.ILayoutFeature;
import org.eclipse.graphiti.features.IMoveShapeFeature;
import org.eclipse.graphiti.features.IRemoveFeature;
import org.eclipse.graphiti.features.IResizeShapeFeature;
import org.eclipse.graphiti.features.IUpdateFeature;
import org.eclipse.graphiti.features.context.IAddContext;
import org.eclipse.graphiti.features.context.IContext;
import org.eclipse.graphiti.features.context.IMoveShapeContext;
import org.eclipse.graphiti.features.context.IPictogramElementContext;
import org.eclipse.graphiti.features.custom.ICustomFeature;
import org.eclipse.graphiti.features.impl.DefaultMoveShapeFeature;
import org.eclipse.graphiti.mm.algorithms.AbstractText;
import org.eclipse.graphiti.mm.pictograms.ContainerShape;
import org.eclipse.graphiti.mm.pictograms.Shape;

public class LabelFeatureContainer implements FeatureContainer {

	@Override
	public Object getApplyObject(IContext context) {
		if (context.getProperty(ContextConstants.LABEL_CONTEXT) != null
				&& (Boolean) context.getProperty(ContextConstants.LABEL_CONTEXT) == true) {
			if (context instanceof IAddContext) {
				IAddContext addContext = (IAddContext) context;
				return addContext.getNewObject();
			}
		} else if (context instanceof IPictogramElementContext) {
			IPictogramElementContext peContext = (IPictogramElementContext) context;
			BaseElement o = BusinessObjectUtil.getFirstElementOfType(peContext.getPictogramElement(), BaseElement.class);
			if (o != null && (o instanceof Gateway || o instanceof Event)) {
				if (peContext.getPictogramElement() instanceof ContainerShape) {
					ContainerShape container = (ContainerShape) peContext.getPictogramElement();
					if (container.getChildren().size() == 1) {
						Shape shape = container.getChildren().get(0);
						if (shape.getGraphicsAlgorithm() instanceof AbstractText) {
							return o;
						}
					}
				}
			}
		}
		return null;
	}

	@Override
	public boolean canApplyTo(Object o) {
		// these all have Label features
		return o instanceof Gateway ||
				o instanceof Event ||
				o instanceof Message ||
				o instanceof DataInput ||
				o instanceof DataOutput ||
				o instanceof DataObject ||
				o instanceof DataObjectReference ||
				o instanceof DataStore ||
				o instanceof DataStoreReference;
	}

	@Override
	public ICreateFeature getCreateFeature(IFeatureProvider fp) {
		return null;
	}

	@Override
	public IAddFeature getAddFeature(IFeatureProvider fp) {
		return new AddLabelFeature(fp);
	}

	@Override
	public IUpdateFeature getUpdateFeature(IFeatureProvider fp) {
		return new UpdateBaseElementNameFeature(fp);
	}

	@Override
	public IDirectEditingFeature getDirectEditingFeature(IFeatureProvider fp) {
		return null;
	}

	@Override
	public ILayoutFeature getLayoutFeature(IFeatureProvider fp) {
		return new LayoutLabelFeature(fp);
	}

	@Override
	public IRemoveFeature getRemoveFeature(IFeatureProvider fp) {
		return null;
	}

	@Override
	public IMoveShapeFeature getMoveFeature(IFeatureProvider fp) {
		return new DefaultMoveShapeFeature (fp) {
  		 @Override
  		public boolean canMoveShape(IMoveShapeContext context) {
  		   return true;
  		}
  		
  		@Override
  		protected void postMoveShape(IMoveShapeContext context) {
  		  super.postMoveShape(context);
  		}
  		 
		};
	}

	@Override
	public IResizeShapeFeature getResizeFeature(IFeatureProvider fp) {
		return null;
	}

	@Override
	public IDeleteFeature getDeleteFeature(IFeatureProvider fp) {
		return null;
	}
	
	@Override
	public ICustomFeature[] getCustomFeatures(IFeatureProvider fp) {
		return null;
	}
}