/*
 * Copyright 2013 Hannes Janetzek
 * Copyright 2016-2018 devemux86
 * Copyright 2017 Longri
 *
 * 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 org.oscim.backend.CanvasAdapter;
import org.oscim.backend.Platform;
import org.oscim.backend.canvas.Bitmap;
import org.oscim.backend.canvas.Canvas;
import org.oscim.backend.canvas.Paint;

import java.awt.Font;
import java.awt.FontMetrics;
import java.awt.Graphics2D;
import java.awt.RenderingHints;
import java.awt.image.BufferedImage;
import java.io.IOException;
import java.io.InputStream;
import java.util.Locale;

public class AwtGraphics extends CanvasAdapter {

    public static void init() {
        CanvasAdapter.init(new AwtGraphics());

        String os = System.getProperty("os.name").toLowerCase(Locale.ENGLISH);
        if (os.contains("win"))
            CanvasAdapter.platform = Platform.WINDOWS;
        else if (os.contains("mac"))
            CanvasAdapter.platform = Platform.MACOS;
        else
            CanvasAdapter.platform = Platform.LINUX;
    }

    public static BufferedImage getBitmap(Bitmap bitmap) {
        return ((AwtBitmap) bitmap).bitmap;
    }

    private AwtGraphics() {
        // do nothing
    }

    @Override
    public Paint newPaintImpl() {
        return new AwtPaint();
    }

    @Override
    public Bitmap newBitmapImpl(int width, int height, int format) {
        return new AwtBitmap(width, height, format);
    }

    @Override
    public Canvas newCanvasImpl() {
        return new AwtCanvas();
    }

    static final BufferedImage image;

    static final Graphics2D canvas;

    static {
        image = new BufferedImage(1, 1, BufferedImage.TYPE_INT_ARGB);
        canvas = image.createGraphics();

        canvas.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
        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_STROKE_CONTROL, RenderingHints.VALUE_STROKE_PURE);
    }

    static synchronized FontMetrics getFontMetrics(Font font) {
        canvas.setFont(font);
        // get character measurements
        FontMetrics fm = canvas.getFontMetrics();
        // int ascent = fm.getMaxAscent();
        // int descent = fm.getMaxDescent();
        // int advance = fm.charWidth('W'); // width of widest char, more
        // reliable than getMaxAdvance();
        // int leading = fm.getLeading();
        //
        return fm;
    }

    static synchronized float getTextWidth(FontMetrics fm, String text) {
        //return (float)fm.getStringBounds(text, canvas).getWidth();
        return fm.stringWidth(text);
    }

    @Override
    public Bitmap decodeBitmapImpl(InputStream inputStream) throws IOException {
        return new AwtBitmap(inputStream);
    }

    @Override
    public Bitmap decodeBitmapImpl(InputStream inputStream, int width, int height, int percent) throws IOException {
        return new AwtBitmap(inputStream, width, height, percent);
    }

    @Override
    public Bitmap decodeSvgBitmapImpl(InputStream inputStream, int width, int height, int percent) throws IOException {
        return new AwtSvgBitmap(inputStream, width, height, percent);
    }

    @Override
    public Bitmap loadBitmapAssetImpl(String relativePathPrefix, String src, int width, int height, int percent) throws IOException {
        return createBitmap(relativePathPrefix, src, width, height, percent);
    }
}
