/*****************************************************************************

 JEP 2.4.1, Extensions 1.1.1
      April 30 2007
      (c) Copyright 2007, Nathan Funk and Richard Morris
      See LICENSE-*.txt for license information.

 *****************************************************************************/
package weasel.jep.function;


import java.util.Stack;
import java.util.Vector;

import weasel.jep.ParseException;
import weasel.jep.type.Complex;


public class Divide extends PostfixMathCommand {
	public Divide() {
		numberOfParameters = 2;
	}

	@Override
	public void run(Stack inStack) throws ParseException {
		checkStack(inStack); // check the stack
		Object param2 = inStack.pop();
		Object param1 = inStack.pop();
		inStack.push(div(param1, param2)); //push the result on the inStack
		return;
	}

	public Object div(Object param1, Object param2) throws ParseException {
		if (param1 instanceof Complex) {
			if (param2 instanceof Complex)
				return div((Complex) param1, (Complex) param2);
			else if (param2 instanceof Number)
				return div((Complex) param1, (Number) param2);
			else if (param2 instanceof Vector) return div((Complex) param1, (Vector) param2);
		} else if (param1 instanceof Number) {
			if (param2 instanceof Complex)
				return div((Number) param1, (Complex) param2);
			else if (param2 instanceof Number)
				return div((Number) param1, (Number) param2);
			else if (param2 instanceof Vector) return div((Number) param1, (Vector) param2);
		} else if (param1 instanceof Vector) {
			if (param2 instanceof Complex)
				return div((Vector) param1, (Complex) param2);
			else if (param2 instanceof Number) return div((Vector) param1, (Number) param2);
		}

		throw new ParseException("Can't divide " + param1.getClass().getSimpleName() + " by " + param2.getClass().getSimpleName());
	}


	public Double div(Number d1, Number d2) {
		return new Double(d1.doubleValue() / d2.doubleValue());
	}

	public Complex div(Complex c1, Complex c2) {
		return c1.div(c2);
	}

	public Complex div(Number d, Complex c) {
		Complex c1 = new Complex(d.doubleValue(), 0);

		return c1.div(c);
	}

	public Complex div(Complex c, Number d) {
		return new Complex(c.re() / d.doubleValue(), c.im() / d.doubleValue());
	}

	public Vector div(Vector v, Number d) {
		Vector result = new Vector();

		for (int i = 0; i < v.size(); i++)
			result.addElement(div((Number) v.elementAt(i), d));

		return result;
	}

	public Vector div(Number d, Vector v) {
		Vector result = new Vector();

		for (int i = 0; i < v.size(); i++)
			result.addElement(div(d, (Number) v.elementAt(i)));

		return result;
	}

	public Vector div(Vector v, Complex c) {
		Vector result = new Vector();

		for (int i = 0; i < v.size(); i++)
			result.addElement(div((Number) v.elementAt(i), c));

		return result;
	}

	public Vector div(Complex c, Vector v) {
		Vector result = new Vector();

		for (int i = 0; i < v.size(); i++)
			result.addElement(div(c, (Number) v.elementAt(i)));

		return result;
	}
}
