namespace ProjectAirplaneWithRadar.MovementStrategy
{
    /// <summary>
    /// Стратегия перемещения объекта в центр экрана
    /// </summary>
    public class MoveToCenter : AbstractStrategy
    {
        protected override bool IsTargetDestination()
        {
            ObjectParameters? objParams = GetObjectParameters;
            if (objParams == null)
            {
                return false;
            }

            return objParams.ObjectMiddleHorizontal - GetStep() <= FieldWidth / 2 && objParams.ObjectMiddleHorizontal + GetStep() >= FieldWidth / 2 &&
            objParams.ObjectMiddleVertical - GetStep() <= FieldHeight / 2 && objParams.ObjectMiddleVertical + GetStep() >= FieldHeight / 2;
        }

        protected override void MoveToTarget()
        {
            ObjectParameters? objParams = GetObjectParameters;
            if (objParams == null)
            {
                return;
            }

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

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