/*
 * Copyright 2010, 2011, 2012, 2013 mapsforge.org
 * Copyright 2013 Hannes Janetzek
 *
 * This file is part of the OpenScienceMap project (http://www.opensciencemap.org).
 *
 * This program is free software: you can redistribute it and/or modify it under the
 * terms of the GNU Lesser General Public License as published by the Free Software
 * Foundation, either version 3 of the License, or (at your option) any later version.
 *
 * This program 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 Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License along with
 * this program. If not, see <http://www.gnu.org/licenses/>.
 */
package org.oscim.awt;

import java.awt.AlphaComposite;
import java.awt.Graphics2D;
import java.awt.RenderingHints;
import java.awt.font.TextLayout;
import java.awt.geom.AffineTransform;

import org.oscim.backend.canvas.Bitmap;
import org.oscim.backend.canvas.Canvas;
import org.oscim.backend.canvas.Paint;

public class AwtCanvas implements Canvas {

	Graphics2D canvas;

	public AwtCanvas() {

	}

	@Override
	public void setBitmap(Bitmap bitmap) {
		if (canvas != null)
			canvas.dispose();

		AwtBitmap awtBitamp = (AwtBitmap) bitmap;

		canvas = awtBitamp.bitmap.createGraphics();

		canvas.setComposite(AlphaComposite.getInstance(AlphaComposite.CLEAR, 0));
		canvas.fillRect(0, 0, bitmap.getWidth(), bitmap.getHeight());

		canvas.setComposite(AlphaComposite.getInstance(AlphaComposite.SRC_OVER, 1.0f));

		canvas.setRenderingHint(RenderingHints.KEY_TEXT_ANTIALIASING,
		                        RenderingHints.VALUE_TEXT_ANTIALIAS_ON);
		//canvas.setRenderingHint(RenderingHints.KEY_FRACTIONALMETRICS, RenderingHints.VALUE_FRACTIONALMETRICS_ON);
		canvas.setRenderingHint(RenderingHints.KEY_RENDERING, RenderingHints.VALUE_RENDER_QUALITY);
		canvas.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);

	}

	@Override
	public void drawText(String text, float x, float y, Paint paint) {

		//		if (paint.isTransparent()) {
		//			return;
		//		}

		AwtPaint awtPaint = (AwtPaint) paint;

		//AwtPaint awtPaint = AwtGraphicFactory.getAwtPaint(paint);

		if (awtPaint.stroke == null) {
			canvas.setColor(awtPaint.color);
			canvas.setFont(awtPaint.font);
			canvas.drawString(text, x + 2, y);
		} else {
			setColorAndStroke(awtPaint);
			TextLayout textLayout = new TextLayout(text,
			                                       awtPaint.font,
			                                       canvas.getFontRenderContext());
			AffineTransform affineTransform = new AffineTransform();
			affineTransform.translate(x + 2, y);
			canvas.draw(textLayout.getOutline(affineTransform));
		}
	}

	private void setColorAndStroke(AwtPaint awtPaint) {
		canvas.setColor(awtPaint.color);
		if (awtPaint.stroke != null) {
			canvas.setStroke(awtPaint.stroke);
		}
	}

	//	@Override
	//	public void drawText(String string, float x, float y, Paint stroke) {
	//		AwtPaint p = (AwtPaint)stroke;
	//
	//		canvas.setFont(p.font);
	//		canvas.setColor(p.color);
	//
	//		canvas.drawString(string, (int)x, (int)y);
	//	}

	@Override
	public void drawBitmap(Bitmap bitmap, float x, float y) {
		// TODO Auto-generated method stub
		throw new UnknownError("not implemented");
	}
}