package GeometricFigures;

abstract public class Figure {
    protected String color;
    protected String type;
    abstract void modifyColor(String string, Observer o);
    protected abstract double getPerimeter();
    abstract public double computePerimeter();

    public Figure(String color, String type) {
        this.color = color;
        this.type = type;
    }

    public String getColor() {
        return color;
    }

    public String getType() {
        return type;
    }

    public String toString() {
        return type + " " + color + " " + Double.toString(computePerimeter());
    }

    public boolean equals(Object o) {
        return (o instanceof Figure) && ((Figure)o).type==type && ((Figure)o).getPerimeter() == this.getPerimeter();
    }

}

package GeometricFigures;

public class Circle extends Figure{

    double pCircle;
    int radius;
    int r;

    public Circle(String color, String type, int radius) {
        super(type,color);
        this.radius = radius;
    }

    public void setRadius(int r) {
        this.radius = r;
    }

    public void setType(String t) {
        this.type = t;
    }

    public void setColor(String c) {
        this.color = c;
    }

    public double computePerimeter() {
        return pCircle = 2 * Math.PI * radius;
    }

    public double getPerimeter() {
        return this.pCircle;
    }

    public void modifyColor(String newcolor, Observer o) {
        this.color = newcolor;
        o.notifyObserver();
    }

}


package GeometricFigures;

public class Square extends Figure{

    int side;
    int s;
    public double pSquare;
    String c;
    String t;


    public Square(String color, String type, int side){
        super(type, color);
        this.side = side;
    }

    public void setSide(int s) {
        this.side = s;
    }

    public void setType(String t) {
        type = t;
    }

    public void setColor(String c) {
        color = c;
    }

    public double computePerimeter() {
        return pSquare = 4 * side;
    }

    public double getPerimeter() {
        return this.pSquare;
    }

    public void modifyColor(String newcolor, Observer o) {
        this.color = newcolor;
        o.notifyObserver();
    }

}


package GeometricFigures;

public class Triangle extends Figure{

    int side1, side2, side3;
    int sd1, sd2, sd3;
    int pTriangle;

    public Triangle(String color, String type, int side1, int side2, int side3) {
        super(type,color);
        this.side1 = side1;
        this.side2 = side2;
        this.side3 = side3;
    }

    public void setTriangle(int sd1, int sd2, int sd3) {
        this.side1 = sd1;
        this.side2 = sd2;
        this.side3 = sd3;
    }

    public void setType(String t) {
        type = t;
    }

    public void setColor(String c) {
        color = c;
    }

    public double computePerimeter() {
        return pTriangle = side1 + side2 + side3;
    }

    public double getPerimeter() {
        return this.pTriangle;
    }

    public void modifyColor(String newcolor, Observer o) {
        this.color = newcolor;
        o.notifyObserver();
    }

}


package GeometricFigures;

public class Observer{

    private Figure[] figures;
    private int i = 0;
    private int j = 0;
    private int noOfFigures;

    public Observer(int noOfFigures) {
        this.noOfFigures = noOfFigures;
        figures = new Figure[noOfFigures];
    }

    public boolean addFigure(Figure f) {
        if(i==0) {
            figures[i] = f;
            i++;
            return true;
        }

        if(i==figures.length) {
            return false;
        }

        for(j=0; j<figures.length; j++) {
            if((f.equals(figures[j])==true)){
                return false;
            }
        }

        if(i<noOfFigures) {
            figures[i] = f;
            i++;
        }

        return true;
    }

    public void notifyObserver() {
        System.out.println("MODIFIED");
    }

    public void printAllFigure() {
        for(i=0 ; i<figures.length ; i++) {
            System.out.println(figures[i]);
        }
    }

}


package GeometricFigures;

public class Main {
    public static void main(String [] args) {

        Figure c1 = new Circle("Circle","Blue",5);
        ((Circle)c1).computePerimeter();
        System.out.println(c1);
        ((Circle)c1).setRadius(4);
        ((Circle)c1).computePerimeter();
        System.out.println(c1);
        ((Circle)c1).setType("Rectangle");
        System.out.println(c1);
        ((Circle)c1).setColor("Pink");
        System.out.println(c1);

        Figure s1 = new Square("Square","Black",4);
        ((Square)s1).computePerimeter();
        System.out.println(s1);
        ((Square)s1).setSide(3);
        ((Square)s1).computePerimeter();
        System.out.println(s1);
        ((Square)s1).setType("Hexagon");
        System.out.println(s1);
        ((Square)s1).setColor("Brown");
        System.out.println(s1);

        Figure t1 = new Triangle("Triangle","Green",1,2,3);
        ((Triangle)t1).computePerimeter();
        System.out.println(t1);
        ((Triangle)t1).setTriangle(4,5,6);
        ((Triangle)t1).computePerimeter();
        System.out.println(t1);
        ((Triangle)t1).setType("Cube");
        System.out.println(t1);
        ((Triangle)t1).setColor("White");
        System.out.println(t1);

        Figure t2 = new Triangle("Triangle","Green",1,2,3);
        ((Triangle)t2).computePerimeter();
        System.out.println(t2);
        ((Triangle)t2).setTriangle(4,5,6);
        ((Triangle)t2).computePerimeter();
        System.out.println(t2);
        ((Triangle)t2).setType("Cube");
        System.out.println(t2);
        ((Triangle)t2).setColor("White");
        System.out.println(t2);

        Observer o1= new Observer(4);

        o1.addFigure(c1);
        o1.addFigure(s1);
        o1.addFigure(t1);
        o1.addFigure(t2);

        o1.printAllFigure();

        c1.modifyColor("Yellow",o1);

    }
}