/*
 * Copyright 2015-2017 devemux86
 *
 * 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 com.kitfox.svg.SVGCache;
import com.kitfox.svg.SVGDiagram;
import com.kitfox.svg.app.beans.SVGIcon;

import org.oscim.backend.CanvasAdapter;

import java.awt.Dimension;
import java.awt.image.BufferedImage;
import java.io.IOException;
import java.io.InputStream;
import java.net.URI;

public class AwtSvgBitmap extends AwtBitmap {
    /**
     * Default size is 20x20px (400px) at 160dpi.
     */
    public static float DEFAULT_SIZE = 400f;

    public static BufferedImage getResourceBitmap(InputStream inputStream, float scaleFactor, float defaultSize, int width, int height, int percent) throws IOException {
        try {
            URI uri = SVGCache.getSVGUniverse().loadSVG(inputStream, Integer.toString(inputStream.hashCode()));
            SVGDiagram diagram = SVGCache.getSVGUniverse().getDiagram(uri);

            double scale = scaleFactor / Math.sqrt((diagram.getHeight() * diagram.getWidth()) / defaultSize);

            float bitmapWidth = (float) (diagram.getWidth() * scale);
            float bitmapHeight = (float) (diagram.getHeight() * scale);

            float aspectRatio = diagram.getWidth() / diagram.getHeight();

            if (width != 0 && height != 0) {
                // both width and height set, override any other setting
                bitmapWidth = width;
                bitmapHeight = height;
            } else if (width == 0 && height != 0) {
                // only width set, calculate from aspect ratio
                bitmapWidth = height * aspectRatio;
                bitmapHeight = height;
            } else if (width != 0 && height == 0) {
                // only height set, calculate from aspect ratio
                bitmapHeight = width / aspectRatio;
                bitmapWidth = width;
            }

            if (percent != 100) {
                bitmapWidth *= percent / 100f;
                bitmapHeight *= percent / 100f;
            }

            SVGIcon icon = new SVGIcon();
            icon.setAntiAlias(true);
            icon.setPreferredSize(new Dimension((int) bitmapWidth, (int) bitmapHeight));
            icon.setScaleToFit(true);
            icon.setSvgURI(uri);
            BufferedImage bufferedImage = new BufferedImage(icon.getIconWidth(), icon.getIconHeight(), BufferedImage.TYPE_INT_ARGB);
            icon.paintIcon(null, bufferedImage.createGraphics(), 0, 0);

            return bufferedImage;
        } catch (Exception e) {
            throw new IOException(e);
        }
    }

    private static BufferedImage getResourceBitmapImpl(InputStream inputStream, int width, int height, int percent) throws IOException {
        synchronized (SVGCache.getSVGUniverse()) {
            return getResourceBitmap(inputStream, CanvasAdapter.getScale(), DEFAULT_SIZE, width, height, percent);
        }
    }

    public AwtSvgBitmap(InputStream inputStream, int width, int height, int percent) throws IOException {
        super(getResourceBitmapImpl(inputStream, width, height, percent));
    }
}