package org.simantics.maps.sg;

import java.awt.AlphaComposite;
import java.awt.BasicStroke;
import java.awt.Color;
import java.awt.Font;
import java.awt.FontMetrics;
import java.awt.Graphics2D;
import java.awt.geom.AffineTransform;
import java.awt.geom.Rectangle2D;

import org.simantics.scenegraph.g2d.G2DNode;
import org.simantics.scenegraph.utils.DPIUtil;

public class MapAttributionNode extends G2DNode {

    private static final long serialVersionUID = 7994492218791569147L;

    private static final Color GRAY              = new Color(100, 100, 100);

    protected boolean enabled = true;

    @Override
    public void render(Graphics2D g2d) {
        if (!enabled)
            return;
        
        AffineTransform ot = g2d.getTransform();
        Color originalColor = g2d.getColor();
        g2d.transform(transform);
        
        g2d.setTransform(new AffineTransform());
        // do the rendering magic
        
        Font rulerFont = new Font("Tahoma", Font.PLAIN, DPIUtil.upscale(9));
        
        //g.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
        g2d.setStroke(new BasicStroke(1));
        g2d.setColor(new Color(0.9f, 0.9f, 0.9f, 0.75f));
        
        Rectangle2D bounds = g2d.getClipBounds();
        if (bounds == null)
            return; // FIXME

        String str = "Map data \u00A9 OpenStreetMap contributors";
        
        g2d.setFont(rulerFont);
        FontMetrics fm = g2d.getFontMetrics();
        Rectangle2D r = fm.getStringBounds(str, g2d);

        double pixels = r.getWidth();
        double scaleRight = bounds.getMaxX();
        double newScaleLeft = scaleRight - pixels;
        double y = bounds.getMaxY();
        g2d.setComposite(AlphaComposite.getInstance(AlphaComposite.SRC_OVER, 0.8f));
        
        
        Rectangle2D vertical = new Rectangle2D.Double(newScaleLeft - 10, y - 15, pixels + 10, 15);
        g2d.fill(vertical);
        
        g2d.setColor(GRAY);
        g2d.setFont(rulerFont);
        
        
        g2d.setColor(Color.BLACK);
        g2d.drawString(str, (int)newScaleLeft - 5, (int)y - 5);
        
        g2d.setColor(originalColor);
        g2d.setTransform(ot);
    }

    @Override
    public Rectangle2D getBoundsInLocal() {
        return null;
    }

    public boolean isEnabled() {
        return enabled;
    }

    public void setEnabled(boolean enabled) {
        this.enabled = enabled;
    }
}