namespace ProjectCruiser.MoveStrategy;

public class MoveToCentre : AbstractStrategy
{
    protected override bool IsTargetDestination()
    {
        ObjParameters? objP = GetObjectParameters;
        if (objP == null)
        {
            return false;
        }

        return objP.ObjectMiddleHorizontal - GetStep() 
            <= FieldWidth / 2 && objP.ObjectMiddleHorizontal 
            + GetStep() >= FieldWidth / 2

            && objP.ObjectMiddleVertical - GetStep() 
            <= FieldHeight / 2 && objP.ObjectMiddleVertical 
            + GetStep() >= FieldHeight / 2;
    }

    protected override void MoveToTarget()
    {
        ObjParameters? objP = GetObjectParameters;
        if (objP == null)
        {
            return;
        }

        int diffx = objP.ObjectMiddleHorizontal - FieldWidth / 2;
        if (Math.Abs(diffx) > GetStep())
        {
            if (diffx > 0)
            {
                MoveLeft();
            }
            else { MoveRight(); }
        }

        int diffy = objP.ObjectMiddleVertical - FieldHeight / 2;
        if (Math.Abs(diffy) > GetStep())
        {
            if (diffy > 0)
            {
                MoveUp();
            }
            else { MoveDown(); }
        }
    }
}