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package com.company;

public class Vehicle {

    private String name;
    private String size;

    private int currentVelocity;
    private int currentDirection;

    public Vehicle(String name, String size) {
        this.name = name;
        this.size = size;

        this.currentDirection = 0;
        this.currentVelocity = 0;

    }

    public void steer (int direction){
        this.currentDirection += direction;
        System.out.println("Vehicle.steer(): Steering at " + currentDirection + "degrees.");
    }
    public void move(int velocity,int direction){
        currentVelocity = velocity;
        currentDirection = direction;
        System.out.println("Vehicle.move(): Moving at " + currentVelocity + " in direction " + currentDirection);
    }

    public String getName() {
        return name;
    }

    public String getSize() {
        return size;
    }

    public int getCurrentVelocity() {
        return currentVelocity;
    }

    public int getCurrentDirection() {
        return currentDirection;
    }
    public void stop(){
        this.currentVelocity = 0;
    }
}
          

package com.company;

public class Car extends Vehicle {

    private int wheels;
    private int doors;
    private int gears;
    private boolean isManuel;

    private int currentGear;

    public Car(String name, String size,
               int wheels, int doors,
               int gears, boolean isManuel) {
        super(name, size);
        this.wheels = wheels;
        this.doors = doors;
        this.gears = gears;
        this.isManuel = isManuel;
        this.currentGear = 1;
    }

    public void changeGear(int currentGear) {
        this.currentGear = currentGear;
        System.out.println("Car.setCurrentGear(): Change to " + this.currentGear + " gear.");
    }
    public void changeVelocity(int speed,int direction){
        System.out.println("Car.changeVelocity(): Velocity " +speed + " direction " + direction);
        move(speed,direction);

    }
}

package com.company;

public class Audi extends Car {
    private int roadServiceMonths;

    public Audi(int roadServiceMonths) {
        super("Audi", "4WD", 5, 5, 6, false);
        this.roadServiceMonths = roadServiceMonths;
    }

    public void accelerate(int rate){
        int newVelocity = getCurrentVelocity() + rate;
        if (newVelocity == 0){
            stop();
            changeGear(1);
        } else if (newVelocity > 10 && newVelocity <= 20){
            changeGear(2);
        } else if (newVelocity > 0 && newVelocity <= 10){
            changeGear(1);
        } else if (newVelocity > 20 && newVelocity <= 30){
            changeGear(3);
        } else {
            changeGear(4);
        }

        if (newVelocity > 0){
            changeVelocity(newVelocity,getCurrentDirection());
        }
    }
}