package nl.rigault.colormix.model;

import java.util.Observable;

public class ColorModel extends Observable {

    private int red, green, blue;

    private static ColorModel theModel = null;

    public static ColorModel getInstance() {
        if (theModel == null) {
            theModel = new ColorModel(255,0,0);
        }

        return theModel;
    }

    private ColorModel(int r, int g, int b) {
        this.red = r;
        this.green = g;
        this.blue = b;
    }

    public void setR(int r) {
        if(this.red != r) {
            if(r<0) {
                this.red = 0;
            }
            else if (r>255) {
                this.red = 255;
            }
            else {
                this.red = r;
            }

            setChanged();
            notifyObservers();
        }
    }

    public void setG(int g) {
        if(this.green != g) {
            if(g<0) {
                this.green = 0;
            }
            else if (g>255) {
                this.green = 255;
            }
            else {
                this.green = g;
            }

            setChanged();
            notifyObservers();
        }
    }

    public void setB(int b) {
        if(this.blue != b) {
            if(b<0) {
                this.blue = 0;
            }
            else if (b>255) {
                this.blue = 255;
            }
            else {
                this.blue = b;
            }

            setChanged();
            notifyObservers();
        }
    }

    public int getR() {
        return red;
    }

    public int getG() {
        return green;
    }

    public int getB() {
        return blue;
    }

}