package initialconditions;

import java.lang.*;
import java.io.*;
import main.BetterTokenizer;
import main.Cell;
import main.GeneralInput;

/**
An initial condition class that sets a middle cell to one value and then the
cells immediately surrounding that middle cell to a second value.
<br>Input Parameters:
<br>Node<br>Value<br>SurroundValue<br>XPos<br>YPos<p>
*/
public class CenterIC extends InitialCondition	{
/** The x,y position of the center cell */	
	int				xPos, yPos;
/** The value given to the surrounding cells. The center cell is set equal to initValue. */
	float			surroundValue;
	
	public final boolean	noiseAware = true;
	
	public CenterIC()	{	super();	}
	
	public CenterIC(String n, int x, int y, float init_value, float surround_value)	{
		super();
		node = n;
		xPos = x;  yPos = y;
		initValue = init_value;
		surroundValue = surround_value;
	}
	
	public void setModel(Cell [] cells)	{
		float cval = initValue;
		float sval = surroundValue;
		if(noiseLevel > 0.0f)	{
			cval += noiseLevel * (float)rng.nextGaussian();
			if(cval < 0.0f) cval = 0.0f;
		}
		try {
			Cell cell = cells[yPos * Cell.arrayWidth + xPos];
			cell.setInitialValue(node, cval);
			for(int i = 0; i < cell.neighbors.length; i++) {
				if(noiseLevel > 0.0f)
				{
					sval = surroundValue + noiseLevel * (float)rng.nextGaussian();
					while(sval >= cval) sval = surroundValue + noiseLevel * (float)rng.nextGaussian();
					if(sval < 0.0f) sval = 0.0f;
				}
				cell.neighbors[i].setInitialValue(node, sval);
			}
		} catch(Exception e)	{ System.out.println(e.toString()); return; }
	}

	protected void loadParameter(String info, BetterTokenizer tokenizer) throws Exception	{
		if(info.equals("XPos")) {
			GeneralInput.nextToken(tokenizer);
			xPos = (int)tokenizer.nval;
		}
		if(info.equals("YPos")) {
			GeneralInput.nextToken(tokenizer);
			yPos = (int)tokenizer.nval;
		}
		if(info.equals("SurroundValue")) {
			GeneralInput.nextToken(tokenizer);
			surroundValue = (float)tokenizer.nval;
		}
		else super.loadParameter(info, tokenizer);
	}

	public void toString(PrintWriter pw, String indent) {
		super.toString(pw, indent);
		pw.println(indent + "&XPos\t" + xPos);
		pw.println(indent + "&YPos\t" + yPos);
		pw.println(indent + "&SurroundValue\t" + surroundValue);
	}
}