package calculator.atoms;
   
   import calculator.Expression;
   import calculator.operations.Operation;
   import calculator.atoms.visitor.AtomVisitor;
   import visitor.Visitor;
   import java.util.Objects;
   import calculator.functions.*;
   
  /**
   * Complex Number type is used to represent complex e.g. 3 + 2i
   * 
   * @see Expression
   * @see Operation
   * @see Atom
   */
  public class Complex implements Atom {
  
  	private final org.apache.commons.numbers.complex.Complex value;
  
  	/**
  	 * Constructor method
  	 * 
  	 * @param real      The real part
  	 * @param imaginary The imaginary part
  	 */
  	public Complex(double real, double imaginary) {
  		this.value = org.apache.commons.numbers.complex.Complex.ofCartesian(real, imaginary);
  	}
  
  	/**
  	 * Constructor method from an existing Complex object
  	 * 
  	 * @param value The commons-numbers Complex object
  	 */
  	public Complex(org.apache.commons.numbers.complex.Complex value) {
  		this.value = value;
  	}
  
  	/**
  	 * Returns a Complex representing a NaN
  	 *
  	 * @return a NaN Complex
  	 */
  	public static Complex nan() {
  		return new Complex(org.apache.commons.numbers.complex.Complex.ofCartesian(Double.NaN, Double.NaN));
  	}
  
  	/**
  	 * Returns if a complex is a NaN
  	 *
  	 * @return true iff the complex represents a NaN
  	 */
  	public boolean isNaN() {
  		return value.isNaN();
  
  	}
  
  	/**
  	 * getter method to obtain the value contained in the object
  	 *
  	 * @return The commons-numbers Complex number contained in the object
  	 */
  	public org.apache.commons.numbers.complex.Complex getValue() {
  		return value;
  	}
  
  	@Override
  	public Complex apply(Operation o, Atom a) {
  		return o.op(this, (Complex) a);
  	}
  
  	@Override
  	public Atom apply(BinaryFunction f, Atom a) {
  		return f.op(this, (Complex) a);
  	}
  
  	@Override
  	public Complex apply(UnaryFunction o) {
  		return o.op(this);
  	}
  
  	@Override
  	public void accept(AtomVisitor v) {
  		v.visit(this);
  	}
  
  	@Override
  	public void accept(Visitor v) {
  		v.visit(this);
  	}
  
  	@Override
  	public boolean equals(Object o) {
  		if (o == null)
  			return false;
  		if (this == o)
  			return true;
  		if (!(o instanceof Complex))
 			return false;
 		Complex other = (Complex) o;
 		return this.value.equals(other.getValue());
 	}
 
 	@Override
 	public int hashCode() {
 		return Objects.hash(value);
 	}
 
 	@Override
 	public String toString() {return value.toString(); }
 
 }