/**
*		@author Kaushik Raj
*		@see	http://www.cis.syr.edu/~kraj/java/
*		@email	kraj@syr.edu
*	
*		(c) copyright-98 Kaushik Raj
*		All Rights Reserved.
*
*       This source code is free for all non-commercial purposes, as long as the name
*       and the url address given above is written with the modified program. The author does not gives
*       the permission to publish the source code in any book or any other publishing media.
*
*
*       The author doesnot takes any responsibility for the software/hardware damages
*       that may occur due to this program.
*/

/**
*	File : ControlPanel.java
*	Last update : 10 July,1998
*/

import java.awt.*;
import java.applet.*;

/**
*	ControlPanel class controls the panel where buttons are
*	given for new game and to change the size of maze.
*/
public class ControlPanel extends Panel {
	
	
	/* displays the label */
	private Label senseLabel;
	private Label levelLabel;
	private Button newGameButton;
	private Button bRatSensePlus,bRatSenseMinus;
	private Button bMazeLevelPlus,bMazeLevelMinus;
	private TextField ratSenseText,gameLevelText;

	private MazeGame mg;

	final static private int MIN_SENSE_LEVEL=1,MAX_SENSE_LEVEL=4;
	final static private int MIN_GAME_LEVEL=6,MAX_GAME_LEVEL=20;

	/* default values of the game */
	private int noOfRows=10;
	private int noOfSmellBlocks=2;

	/* make the panel board */
	public ControlPanel(MazeGame mg) {

		
		setLayout(null);
		setForeground(Color.white);
		setBackground(Color.black);

		setFont(new Font("Times",Font.BOLD,12));
		senseLabel=new Label("Sense Power");
		levelLabel=new Label("Game Level");

		bRatSensePlus=new Button("+");
		bRatSenseMinus=new Button("-");

		bMazeLevelPlus=new Button("+");
		bMazeLevelMinus=new Button("-");

		ratSenseText=new TextField("");
		gameLevelText=new TextField("");

		newGameButton=new Button("NEW GAME");

		levelLabel.reshape(24,12,81,21);
		senseLabel.reshape(24,84,96,25);

		bMazeLevelMinus.reshape(24,48,26,24);
		bMazeLevelPlus.reshape(96,48,26,24);

		bRatSenseMinus.reshape(24,120,26,24);
		bRatSensePlus.reshape(96,120,26,24);

		ratSenseText.reshape(60,48,26,24);
		gameLevelText.reshape(60,120,26,24);

		newGameButton.reshape(24,168,98,28);

		add(senseLabel);
		add(levelLabel);
		add(bRatSensePlus);
		add(bRatSenseMinus);
		add(bMazeLevelPlus);
		add(bMazeLevelMinus);
		add(ratSenseText);
		add(gameLevelText);
		add(newGameButton);

		validate();
		this.mg=mg;
		updateLevels();
	}

	public boolean handleEvent(Event event) {
		return super.handleEvent(event);
	}

	/** returns the level of the game at present */
	public int getGameLevel(){
		return noOfRows;
	}

	/** returns the smell power of the rat */
	public int getSensingPower(){
		return noOfSmellBlocks;
	}

	/** if the new game button is clicked new game starts
	*	otherwise if other buttons are clicked the game level
	*	is increased or decreased as asked by the user 
	*/
   public boolean action(Event e,Object o) { 
	   if (e.target==newGameButton) { 
		   //System.out.println("Button Clicked");
		   mg.makePlayAgain() ; 
	   }else
	   if (e.target==bMazeLevelMinus) setGameLevel(false);
	   else if (e.target==bMazeLevelPlus) setGameLevel(true);
	   else if (e.target==bRatSenseMinus) setSenseLevel(false);
	   else if (e.target==bRatSensePlus) setSenseLevel(true);
	   

	   return true ;
   }

   /** private call to set the game level */
   private void setGameLevel(boolean increase){
	   if (increase){
		   if (noOfRows>=MAX_GAME_LEVEL);
		   else noOfRows++;
	   }else{
		   if (noOfRows<=MIN_GAME_LEVEL);
		   else noOfRows--;
	   }
		updateLevels();
   }

   /** private call to swet the sense level of the rat */
   private void setSenseLevel(boolean increase){
	   if (increase){
		   if (noOfSmellBlocks>=MAX_SENSE_LEVEL);
		   else noOfSmellBlocks++;
	   }else{
		   if (noOfSmellBlocks<=MIN_SENSE_LEVEL);
		   else noOfSmellBlocks--;
	   }
	   updateLevels();
   }

   /** updates the display at the control panel */
   private void updateLevels(){
	   String sGame=""+getGameLevel();
	   String sSense=""+getSensingPower();
		
	   ratSenseText.setText(sGame);
	   gameLevelText.setText(sSense);
   }
}