PIbd-21_Zhirnova_A_E_DoubleDeckerBus._Hard/DoubleDeckerBus/MovementStrategy/AbstractStrategy.java

package DoubleDeckerBus.MovementStrategy;

import DoubleDeckerBus.DirectionType;

public abstract class AbstractStrategy {
    private IMoveableObject _moveableObject;

    private Status _state = Status.NotInit;

    private int FieldWidth;

    protected int FieldWidth() {
        return FieldWidth;
    }

    private int FieldHeight;

    protected int FieldHeight() {
        return FieldHeight;
    }

    public Status GetStatus() {
        return _state;
    }

    public void SetData(IMoveableObject moveableObject, int width, int height) {
        if (moveableObject == null) {
            _state = Status.NotInit;
            return;
        }

        _state = Status.InProgress;
        _moveableObject = moveableObject;
        FieldWidth = width;
        FieldHeight = height;
    }

    public void MakeStep() {
        if (_state != Status.InProgress) {
            return;
        }

        if (IsTargetDestination()) {
            _state = Status.Finish;
            return;
        }
        MoveToTarget();
    }

    protected boolean MoveLeft() {
        return MoveTo(DirectionType.Left);
    }

    protected boolean MoveRight() {
        return MoveTo(DirectionType.Right);
    }

    protected boolean MoveUp() {
        return MoveTo(DirectionType.Up);
    }

    protected boolean MoveDown() {
        return MoveTo(DirectionType.Down);
    }

    protected ObjectParameters GetObjectParameters(){
        if (_moveableObject != null) {
            return _moveableObject.GetObjectParameters();
        }
        else {
            return null;
        }
    }

    protected Integer GetStep() {
        if (_state != Status.InProgress) {
            return null;
        }
        return _moveableObject.GetStep();
    }

    protected abstract void MoveToTarget();

    protected abstract boolean IsTargetDestination();

    private boolean MoveTo(DirectionType directionType) {
        if (_state != Status.InProgress) {
            return false;
        }

        if (_moveableObject.CheckCanMove(directionType)) {
            _moveableObject.MoveObject(directionType);
            return true;
        }

        return false;
    }
}