/*
 * (c) Copyright 2010-2011 AgileBirds
 *
 * This file is part of OpenFlexo.
 *
 * OpenFlexo is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * OpenFlexo is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with OpenFlexo. If not, see <http://www.gnu.org/licenses/>.
 *
 */
package org.openflexo.foundation.viewpoint;

import org.openflexo.antar.binding.BindingModel;
import org.openflexo.foundation.Inspectors;
import org.openflexo.foundation.viewpoint.ViewPoint.ViewPointBuilder;
import org.openflexo.foundation.viewpoint.binding.EditionPatternPathElement;
import org.openflexo.foundation.viewpoint.binding.ViewPointDataBinding;
import org.openflexo.toolbox.StringUtils;

public class DropScheme extends AbstractCreationScheme {

	private String target;
	private ShapePatternRole targetPatternRole;

	public DropScheme(ViewPointBuilder builder) {
		super(builder);
	}

	@Override
	public EditionSchemeType getEditionSchemeType() {
		return EditionSchemeType.DropScheme;
	}

	@Override
	public String getInspectorName() {
		return Inspectors.VPM.DROP_SCHEME_INSPECTOR;
	}

	public String _getTarget() {
		return target;
	}

	public void _setTarget(String target) {
		this.target = target;
	}

	public EditionPattern getTargetEditionPattern() {
		if (StringUtils.isEmpty(_getTarget())) {
			return null;
		}
		if (isTopTarget()) {
			return null;
		}
		if (getViewPointLibrary() != null) {
			return getViewPointLibrary().getEditionPattern(_getTarget());
		}
		return null;
	}

	public void setTargetEditionPattern(EditionPattern targetEditionPattern) {
		_setTarget(targetEditionPattern != null ? targetEditionPattern.getURI() : null);
		updateBindingModels();
	}

	public boolean isTopTarget() {
		return getTopTarget();
	}

	public boolean getTopTarget() {
		if (StringUtils.isEmpty(_getTarget())) {
			return false;
		}
		return _getTarget().equalsIgnoreCase("top");
	}

	public void setTopTarget(boolean flag) {
		if (flag) {
			_setTarget("top");
		} else {
			_setTarget("");
		}
	}

	public boolean targetHasMultipleRoles() {
		return getTargetEditionPattern() != null && getTargetEditionPattern().getShapePatternRoles().size() > 1;
	}

	public ShapePatternRole getTargetPatternRole() {
		return targetPatternRole;
	}

	public void setTargetPatternRole(ShapePatternRole targetPatternRole) {
		this.targetPatternRole = targetPatternRole;
	}

	public boolean isValidTarget(EditionPattern aTarget, PatternRole contextRole) {
		if (getTargetEditionPattern() != null && getTargetEditionPattern().isAssignableFrom(aTarget)) {
			if (targetHasMultipleRoles()) {
				// TODO make proper implementation when role inheritance will be in use !!!
				return getTargetPatternRole() == null
						|| getTargetPatternRole().getPatternRoleName().equals(contextRole.getPatternRoleName());
			} else {
				return true;
			}
		}
		return false;
	}

	@Override
	protected void appendContextualBindingVariables(BindingModel bindingModel) {
		super.appendContextualBindingVariables(bindingModel);
		bindingModelNeedToBeRecomputed = false;
		if (getTargetEditionPattern() != null) {
			bindingModel.addToBindingVariables(new EditionPatternPathElement<DropScheme>(EditionScheme.TARGET, getTargetEditionPattern(),
					this));
		} else if (_getTarget() != null && !_getTarget().equals("top")) {
			// logger.warning("Cannot find edition pattern " + _getTarget() + " !!!!!!!!!!!!!!");
			bindingModelNeedToBeRecomputed = true;
		}
	}

	private boolean bindingModelNeedToBeRecomputed = false;

	@Override
	public BindingModel getBindingModel() {
		if (bindingModelNeedToBeRecomputed) {
			bindingModelNeedToBeRecomputed = false;
			updateBindingModels();
		}
		return super.getBindingModel();
	}

	@Override
	protected void rebuildActionsBindingModel() {
		if (!bindingModelNeedToBeRecomputed) {
			super.rebuildActionsBindingModel();
		}
	}

	@Override
	public AddShape createAddShapeAction() {
		AddShape newAction = super.createAddShapeAction();
		if (isTopTarget()) {
			newAction.setContainer(new ViewPointDataBinding(EditionScheme.TOP_LEVEL));
		}
		return newAction;
	}

}