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/*
 * Copyright (c) 2011-2017, Peter Abeles. All Rights Reserved.
 *
 * This file is part of BoofCV (http://boofcv.org).
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package boofcv.abst.tracker;

import boofcv.alg.tracker.circulant.CirculantTracker;
import boofcv.struct.image.ImageGray;
import boofcv.struct.image.ImageType;
import georegression.geometry.UtilPolygons2D_F64;
import georegression.struct.shapes.Quadrilateral_F64;
import georegression.struct.shapes.Rectangle2D_F64;
import georegression.struct.shapes.RectangleLength2D_F32;

/**
 * Wrapper around {@link CirculantTracker} for {@link TrackerObjectQuad}.
 *
 * @author Peter Abeles
 */
public class Circulant_to_TrackerObjectQuad> implements TrackerObjectQuad {

	CirculantTracker tracker;
	Rectangle2D_F64 rect = new Rectangle2D_F64();

	ImageType imageType;

	public Circulant_to_TrackerObjectQuad(CirculantTracker tracker , ImageType imageType) {
		this.tracker = tracker;
		this.imageType = imageType;

	}

	@Override
	public boolean initialize(T image, Quadrilateral_F64 location) {


		UtilPolygons2D_F64.bounding(location, rect);

		int width = (int)(rect.p1.x - rect.p0.x);
		int height = (int)(rect.p1.y - rect.p0.y);

		tracker.initialize(image,(int)rect.p0.x,(int)rect.p0.y,width,height);

		return true;
	}

	@Override
	public void hint(Quadrilateral_F64 hint) {
		UtilPolygons2D_F64.bounding(hint, rect);

		int width = (int)(rect.p1.x - rect.p0.x);
		int height = (int)(rect.p1.y - rect.p0.y);

		tracker.setTrackLocation((int)rect.p0.x,(int)rect.p0.y,width,height);
	}

	@Override
	public boolean process(T image, Quadrilateral_F64 results) {

		tracker.performTracking(image);
		RectangleLength2D_F32 r = tracker.getTargetLocation();

		if( r.x0 >= image.width || r.y0 >= image.height )
			return false;
		if( r.x0+r.width < 0 || r.y0+r.height < 0 )
			return false;

		float x0 = r.x0;
		float y0 = r.y0;
		float x1 = r.x0 + r.width;
		float y1 = r.y0 + r.height;

		results.a.x = x0;
		results.a.y = y0;
		results.b.x = x1;
		results.b.y = y0;
		results.c.x = x1;
		results.c.y = y1;
		results.d.x = x0;
		results.d.y = y1;

		return true;
	}

	@Override
	public ImageType getImageType() {
		return imageType;
	}

	@Override
	public CirculantTracker getLowLevelTracker() {
		return tracker;
	}
}