package ch.epfl.alpano;

import java.io.File;
import java.util.Locale;

import javax.imageio.ImageIO;
import ch.epfl.alpano.dem.ContinuousElevationModel;
import ch.epfl.alpano.dem.DiscreteElevationModel;
import ch.epfl.alpano.dem.HgtDiscreteElevationModel;
import ch.epfl.alpano.gui.ChannelPainter;
import ch.epfl.alpano.gui.ImagePainter;
import ch.epfl.alpano.gui.PanoramaRenderer;
import ch.epfl.alpano.gui.PanoramaUserParameters;
import javafx.embed.swing.SwingFXUtils;
import javafx.scene.image.Image;
import ch.epfl.alpano.gui.PredefinedPanoramas;

final class DrawPanoramaNew2 {

    public static void main(String[] as) throws Exception {
        PanoramaUserParameters pano = PredefinedPanoramas.JURA_ALPS.get();

        ContinuousElevationModel cDEM =generatePredefinedCDEM("./HGT/");
        Panorama p = new PanoramaComputer(cDEM)
                .computePanorama(pano.panoramaComputeParameters());
        
        ChannelPainter d = p::distanceAt;
        ChannelPainter sl = p::slopeAt;
        ChannelPainter h = d.div(100000).cycling().mul(360);
        ChannelPainter s = d.div(200000).clamped().inverted();
        ChannelPainter b = sl.mul(2).div(Math.PI).inverted().mul(0.7).add(0.3);
        ChannelPainter o =
                d.map(dist -> dist == Float.POSITIVE_INFINITY ? 0 : 1);

        ImagePainter l = ImagePainter.hsb(h, s, b, o);
       
        Image i = PanoramaRenderer.renderPanorama(p, l);
        ImageIO.write(SwingFXUtils.fromFXImage(i, null),
                "png",
                new File("tests/ch/epfl/alpano/niesen-profile.png"));

    }
    
    private static final ContinuousElevationModel generatePredefinedCDEM(String path){

        DiscreteElevationModel DEM1=null;
        DiscreteElevationModel DEM2=null;
        File file;
        for(int i=6;i<=11;++i){
            for(int j=45;j<=47;++j){
                file = new File(String.format((Locale) null, path+"N%02dE%03d.hgt",j,i));
                if(DEM1==null)
                    DEM1 = new HgtDiscreteElevationModel(file);
                DEM1 = new HgtDiscreteElevationModel(file).union(DEM1);
            }
            if(DEM2==null)
                DEM2=DEM1;
            DEM2=DEM1.union(DEM2);
            DEM1=null;
        }
        return new ContinuousElevationModel(DEM2);
    }
}