package affectors;

import java.io.PrintWriter;
import java.util.Enumeration;
import java.util.Vector;
import main.Node;
import main.Cell;
import main.Globals;

/** This is a special "meta-affector". Rather than calculating something on its own, the
	ProductAff is a container for other affectors. It simply multiplies together the values of
	each affector contained within it. For instance, to add an inhibition to some other term,
	you might wrap the term in a ProductAff along with the <a href="PsiAff">PsiAff</a><p>

<p> <b>Formula</b>
<br>dnodex/dt = SubAffector1 * SubAffector2 * ... * SubAffectorN

<p> <b>Parameters</b>
<br>No Parameters

<p> <b>Usage</b>
<code><font size = "3"><br>&NODEX
<blockquote>&ProductAff
<blockquote>    &[some_affector]
				<br>&[some_other_affector]</blockquote>
			&endProductAff</blockquote>
&endNODEX</code></font>
*/

public class Product extends EnhancerRegionAff implements Cloneable	{
	static final String		desc = "Product of several other affectors";
	static final int	[]	whichSides = { -1 };
	
	public Product() {	}

	protected void setLabelsAndTypes()	{
		setDescriptions(this.desc, null, null);
		setSided(true, whichSides);

		this.Type[GUI_CAPABLE] = 0;
		this.Type[CERTIFICATION] = Affector.RETURNS_DERIV;
		this.Type[MATHTYPE] = Affector.FF;	// ???? None really fit
		this.Type[TERMTYPE] = Affector.PRODUCTION;
	}

	public void setParameterNumbers(int [] param_nums)	{}	// Keep compiler happy

	/** Overrides Affector.getValue() to multiply together the values from
		all the subsidiary affectors. */
	public float getValue(Node which_node)	 {
		float	value = 1;
		
		for(int i = 0; i < numAffectors; i++)
			value *= affectors[i].getValue(which_node);
		return value;
	}
	
	/** Overrides Affector.getNCValue() to multiply together the values from
		all the subsidiary affectors. */
	public float getNCValue(Node which_node)  {
		if(containsTarget) {
			float	value = 1;
			
			for(int i = 0; i < numAffectors; i++)
				value *= affectors[i].getNCValue(which_node);
			return value;
		}
		
		else return super.getNCValue(which_node);
	}



/* The rest of these functions are overrides of Affector functions so that they
	work right for this class. */
	
	public Affector copy()	{
		ProductAff element = null;
		try { element = (ProductAff)this.clone(); }
		catch(CloneNotSupportedException e) { System.out.println("Error cloning ProductAff: " + e.toString()); }
		element.affectors = new Affector[numAffectors];
		element.numAffectors = 0;
		for(int i = 0; i < numAffectors; i++) {
			element.addAffector(affectors[i].copy());
		}
		return element;
	}
}