/*
  Author:  James Tam
  Version: March 13, 2017

  Features:
  * Tracks and manages information for appearance and fuel capacity.


 */

public class Car
{
    public static final int STARTING_FUEL = 40;
    public static final int STANDARD_DISTANCE = 2;
    public static final int CONSUMPTION_RATE = 2;
    public static final char STARTING_LOOK = 'c';

    private char appearance;
    protected int fuel;

    public Car()
    {
	setAppearance(STARTING_LOOK);
	fuel = STARTING_FUEL;
    }

    // As the car moves, this class or child classes can specify for that type of car
    // how much fuel to consume.
    protected void consumeFuel(int amount)
    {
        int temp = fuel - amount;
	if (temp < 0)
	    fuel = 0;
	else
	    fuel = temp;
    }

    public int getFuel()
    {
	return fuel;
    }

    // Allows external queries of the fuel state of a particular car.
    public boolean isEmpty()
    {
	if (fuel <= 0)
	    return(true);
	else
	    return(false);
    }

    // Car internally knows how much fuel to use and how far to move. However the 
    // actual movement in the virtual track must be done by another class hence
    // this method must communicate to the caller how far it moves.


    // If this method is overriden then all child class methods must also display
    // the same debugging messages shown below.
    public int move()
    {
	consumeFuel(CONSUMPTION_RATE);
	System.out.println("Current fuel: " + fuel);
	System.out.println("Fuel use: " + CONSUMPTION_RATE);
	System.out.println("Distance traveled: " + STANDARD_DISTANCE);
	return(STANDARD_DISTANCE);
    }

    public void setAppearance (char anAppearance)
    {
	appearance = anAppearance;
    }

    public void setFuel (int newFuel)
    {
	if (newFuel < 0)
	    System.out.println("Fuel cannot be set to a negative value");
	else
	    fuel = newFuel;
    }

    public String toString() 
    {
	String s = "";
	s = s + appearance;
	return s;
    }
}