package exercises;

/**
 *
 * @author Lefteris Moussiades <lmous@teiemt.gr>
 */
public class Complex {
    private double r;
    private double f;
    public static boolean stdNot;
    
    public Complex(double r, double f) {
        this.r=r;
        this.f=f;
    }
    
    public void setR(double r) {
        this.r=r;
    }
    
    public void setF(double f) {
        this.f=f;
    }
    
    public double getR() {
        return r;
    }
    
    public double getF() {
        return f;
    } 
    
    @Override
    public String toString() {
        if (stdNot)
        return "("+r+", "+f+")";
        else
            return r+"+"+f+"i";
    }
    
    public void assign(Complex c) {
        r=c.r;
        f=c.f;
    }
    
    public Complex add(Complex c) {
        double real;
        double fant;
        real=r+c.r;
        fant=f+c.f;
        return new Complex(real, fant);
    }
    
     public Complex subtract(Complex c) {
        double real;
        double fant;
        real=r-c.r;
        fant=f-c.f;
        return new Complex(real, fant);
    }
     
    public Complex multiply(Complex c) {
        double real=r*c.r-f*c.f;
        double fant=r*c.f+f*c.r;
        return new Complex(real, fant);
    } 
    
    public Complex divide(Complex c) {
        double x2=Math.pow(c.r, 2);
        double c2=Math.pow(c.f, 2);
        double real=c.r/(x2+c2);
        double fant=-c.f/(x2+c2);
        Complex oneByZ=new Complex(real,fant);
        return this.multiply(oneByZ);
        
        
    }
     
//    @Override
//    public boolean equals(Object o) {
//        Complex c=(Complex)o;
//        return r==c.r && f==c.f;
//    } 

    @Override
    public int hashCode() {
        int hash = 3;
        hash = 67 * hash + (int) (Double.doubleToLongBits(this.r) ^ (Double.doubleToLongBits(this.r) >>> 32));
        hash = 67 * hash + (int) (Double.doubleToLongBits(this.f) ^ (Double.doubleToLongBits(this.f) >>> 32));
        return hash;
    }

    @Override
    public boolean equals(Object obj) {
        if (this == obj) {
            return true;
        }
        if (obj == null) {
            return false;
        }
        if (getClass() != obj.getClass()) {
            return false;
        }
        final Complex other = (Complex) obj;
        if (Double.doubleToLongBits(this.r) != Double.doubleToLongBits(other.r)) {
            return false;
        }
        if (Double.doubleToLongBits(this.f) != Double.doubleToLongBits(other.f)) {
            return false;
        }
        return true;
    }
    
     
    
    
    public static void main(String[] args) {
        Complex c1=new Complex(2,3);
        Complex c2=new Complex(5,7);
        c1.assign(c2);
        c2.setF(9);
        System.out.println(c1+" "+c2);
        Complex sum=c1.add(c2);
        Complex sub=sum.subtract(c2);
        System.out.println("c1+c2 = " + c1 +" + "+c2+" = "+c1.add(c2));
        System.out.println("sum-c2 = " + sum +" - "+c2+" = "+sum.subtract(c2));
        
    }
    
}