/*
 * (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.fge.geomedit.edition;

import java.awt.Color;

import org.openflexo.fge.geom.FGECircle;
import org.openflexo.fge.geom.FGELine;
import org.openflexo.fge.geom.FGEPoint;
import org.openflexo.fge.geom.area.FGEUnionArea;
import org.openflexo.fge.geomedit.GeomEditController;
import org.openflexo.fge.geomedit.Line;
import org.openflexo.fge.geomedit.construction.CircleConstruction;
import org.openflexo.fge.geomedit.construction.PointConstruction;
import org.openflexo.fge.geomedit.construction.TangentLineWithCircleAndPointConstruction;
import org.openflexo.fge.graphics.FGEDrawingGraphics;
import org.openflexo.fge.graphics.ForegroundStyle;
import org.openflexo.fge.graphics.ForegroundStyle.DashStyle;

public class CreateTangentLineWithCircleAndPoint extends Edition {

	public CreateTangentLineWithCircleAndPoint(GeomEditController controller) {
		super("Create tangent line to a circle and crossing point", controller);
		inputs.add(new ObtainCircle("Select circle", controller));
		inputs.add(new ObtainPoint("Select point", controller));
		inputs.add(new ObtainPoint("Select a point identifying side", controller));
	}

	@Override
	public void performEdition() {
		if (((ObtainCircle) inputs.get(0)).getReferencedCircle() != null) {
			((ObtainCircle) inputs.get(0)).getReferencedCircle().getGraphicalRepresentation().setIsSelected(false);
		}

		CircleConstruction circle = ((ObtainCircle) inputs.get(0)).getConstruction();
		PointConstruction point = ((ObtainPoint) inputs.get(1)).getConstruction();
		PointConstruction choosingPoint = ((ObtainPoint) inputs.get(2)).getConstruction();

		addObject(new Line(getController().getDrawing().getModel(), new TangentLineWithCircleAndPointConstruction(circle, point,
				choosingPoint)));

	}

	@Override
	public void paintEdition(FGEDrawingGraphics graphics, FGEPoint lastMouseLocation) {
		if (currentStep == 0) {
			// Nothing to draw
		} else if (currentStep == 1) {
			if (((ObtainCircle) inputs.get(0)).getReferencedCircle() != null) {
				((ObtainCircle) inputs.get(0)).getReferencedCircle().getGraphicalRepresentation().setIsSelected(true);
			}
			FGECircle circle = ((ObtainCircle) inputs.get(0)).getInputData();
			FGEUnionArea tangentPoints = FGECircle.getTangentsPointsToCircle(circle, lastMouseLocation);

			if (tangentPoints.isUnionOfPoints()) {
				graphics.setDefaultForeground(ForegroundStyle.makeStyle(Color.LIGHT_GRAY, 1, DashStyle.MEDIUM_DASHES));
				FGELine line1 = new FGELine(lastMouseLocation, (FGEPoint) tangentPoints.getObjects().firstElement());
				FGELine line2 = new FGELine(lastMouseLocation, (FGEPoint) tangentPoints.getObjects().elementAt(1));
				line1.paint(graphics);
				line2.paint(graphics);
				graphics.setDefaultForeground(ForegroundStyle.makeStyle(Color.RED, 1));
				tangentPoints.getObjects().firstElement().paint(graphics);
				tangentPoints.getObjects().elementAt(1).paint(graphics);
			}
		} else if (currentStep == 2) {
			FGECircle circle = ((ObtainCircle) inputs.get(0)).getInputData();
			FGEPoint point = ((ObtainPoint) inputs.get(1)).getInputData();
			FGEUnionArea tangentPoints = FGECircle.getTangentsPointsToCircle(circle, point);
			if (tangentPoints.isUnionOfPoints()) {
				graphics.setDefaultForeground(ForegroundStyle.makeStyle(Color.LIGHT_GRAY, 1, DashStyle.MEDIUM_DASHES));
				FGELine line1 = new FGELine(point, (FGEPoint) tangentPoints.getObjects().firstElement());
				FGELine line2 = new FGELine(point, (FGEPoint) tangentPoints.getObjects().elementAt(1));
				line1.paint(graphics);
				line2.paint(graphics);
				graphics.setDefaultForeground(ForegroundStyle.makeStyle(Color.RED, 1));
				tangentPoints.getObjects().firstElement().paint(graphics);
				tangentPoints.getObjects().elementAt(1).paint(graphics);
				new FGELine(point, tangentPoints.getNearestPoint(lastMouseLocation)).paint(graphics);
			}
		}
	}
}