/*
TestTank.java
	(C) Copyright 2000 by Scott Sherman.  All rights reserved.
Scott Sherman 6-00...

	a sample pawn external to the CyberClash project
*/

import com.loki3.cyber.pawn.*;

public class TestTank implements GameListener, DamageListener, EnergyListener
{
	// GameListener
	public boolean use(Pawn pawn)
	{
		mPawn = pawn;
		// ask to be notified of damage to the pawn
		mPawn.addDamageListener(this);
		// ask to be notified when we run out of gas or start to get low
		mPawn.getEnergy().addEnergyListener(this, 40);
		return true;
	}

	public void gameStarted()
	{
		mTime = 0;
	}

	public void gameTick(double tick)
	{
		mTime += tick;	// keep track of elapsed time
		// change speed occasionally for the fun of it
		if ( (mTime % 40) == 0 )
			mPawn.changeSpeed(0);
		else if ( (mTime % 40) == 20 )
			mPawn.changeSpeed(mPawn.getMaxSpeed());
		// and direction too
		if ( (mTime % 49) == 0 )
			mPawn.turnLeft(30);
		if ( (mTime % 49) == 25 )
			mPawn.turnRight(40);
	}
	public void gameEnded()	{ mPawn = null; }

	// DamageListener
	public void unitDamaged(Unit unit, double amount)	{}
	public void unitDestroyed(Unit unit)   {}

	// EnergyListener
	public void energyLow(Unit unit, double remaining)	{}
	public void energyDrained(Unit unit)	{}

	Pawn mPawn = null;
	double mTime = 0;	// number of ticks since game began
}