package RandomMoveInGrid;

/**
 * Agent.java 
 */

import java.util.Formatter;
import java.awt.Point;
import java.util.ArrayList;

import uchicago.src.sim.util.*;
import uchicago.src.sim.gui.*;
import uchicago.src.sim.space.*;
import uchicago.src.sim.gui.ColorMap;
import java.awt.Color;

public class Agent implements Drawable {
	// class variables
    public  static int          	nextID = 0; // to give each an ID
	public  static Object2DGrid    	world;  	// where the agents live
	public  static Model		   	model;      // the model "in charge"

	// instance variables  
	int 				ID;
	private int 		x, y;

	// the Agent constructor
	public Agent ( ) {
		ID = nextID++;
		x = 0;
		y = 0;
	}

	////////////////////////////////////////////////////////////////////////////
	// step
	// Top level definition of what the agent can do each time its activiated.
	// Currenlty it does this:
	// - get random dx,dy values in -1,0,1 as possible move to make
	// - asks the world to move that way.
	// - if move, cache new x,y values in own instance variables

	public void step () {
		int moved = 0;  // not moved this step

		if ( model.getRDebug() > 0 ) 
			System.out.printf( "   --Agent-step() for ID=%d at x,y=%d,%d.\n",
						   ID, x, y );

		int dx = Model.getUniformIntFromTo( -1, 1 );  // dx = { -1,0,1 } 
		int dy = Model.getUniformIntFromTo( -1, 1 );  // dy = { -1,0,1 }

		if ( model.getRDebug() > 0 ) 
			System.out.printf( "   - try to move dx,dy = %d,%d\n", dx, dy );

		// ask the world to move us: return of null means not allowed,
		// otherwise the Point object has the new x,y values.
		Point pt = model.moveObjectInWorld( this, dx, dy );
		if ( pt == null ) {
			if ( model.getRDebug() > 0 ) 
				System.out.printf( "   - failed to move dx,dy = %d,%d.\n", dx, dy );
		}
		else { // moved to location specified
			x = (int) pt.getX();
			y = (int) pt.getY();
			moved = 1;
		}

		if ( model.getRDebug() > 1 ) 
			System.out.printf("      Agent.step() done. Agent moved = %d.\n", moved );

	}


	////////////////////////////////////////////////////////////////////////////
	// setters and getters
	public void setID(int i) {	
		ID = i; 
	}
	public int getID() {
		return ID;
	}

	// note these are class methods, to set class variables
	public static void setWorld( Object2DGrid w ) {
		world = w;
	}
	public static void setModel( Model m ) { model = m; }

	// instance variables to cache own x,y location
	public int getX() { return x; }
	public void setX( int i ) { x = i; }
	public int getY() { return y; }
	public void setY( int i ) { y = i; }

	// we implement Drawable interface, so we need this method
	// so that the agent can draw itself when requested
	// (by the GUI display).
    public void draw( SimGraphics g ) {
		g.drawFastRoundRect( Color.blue );
    }

}