package org.simantics.district.network.visualisations.model;

import java.awt.Color;
import java.util.Arrays;
import java.util.List;

public class DynamicColorMap {
    
    static List<RGBIntensity> blues = Arrays.asList(new RGBIntensity(0, 0, 0.1), new RGBIntensity(0, 0, 0.5), new RGBIntensity(0, 0, 0.9));

    public static final DynamicColorMap DEFAULT = new DynamicColorMap("default", blues);
    
    private String label;
    private List<RGBIntensity> intensities;
    
    public DynamicColorMap(String label, List<RGBIntensity> intensities) {
        this.label = label;
        this.intensities = intensities;
    }

    public String getLabel() {
        return label;
    }

    public List<RGBIntensity> getIntensities() {
        return intensities;
    }

    public static class RGBIntensity {
        
        private double red;
        private double green;
        private double blue;
        
        public RGBIntensity(double red, double green, double blue) {
            this.red = red;
            this.green = green;
            this.blue = blue;
        }

        public double getRed() {
            return red;
        }

        public double getGreen() {
            return green;
        }

        public double getBlue() {
            return blue;
        }
    }

    public Color getColor(double value, double defaultMin, double defaultMax) {
        
        double gap = defaultMax - defaultMin;
        double singleGap = gap / getIntensities().size();
        
        int i = 0;
        while (i < getIntensities().size() - 1) {
            if (value <= defaultMin + (i * singleGap)) {
                break;
            }
            i++;
        }
        
        RGBIntensity intensity = getIntensities().get(i);
        return new Color((float)intensity.getRed(), (float)intensity.getGreen(), (float)intensity.getBlue());
    }
}