using ProjectMonorail.Drawings;

namespace ProjectMonorail.MovementStrategy;

/// <summary>
/// Класс-реализация IMoveableObject с использованием DrawingTrain
/// </summary>
public class MoveableTrain : IMovableObjects
{
    /// <summary>
    /// Поле-объект класса DrawingTrain или его наследника
    /// </summary>
    private readonly DrawingTrain? _train = null;

    /// <summary>
    /// Конструктор
    /// </summary>
    /// <param name="train">Объект класса DrawingTrain</param>
    public MoveableTrain(DrawingTrain train)
    {
        _train = train;
    }

    public ObjectParameters? GetObjectPosition
    {
        get
        {
            if(_train == null || _train.EntityTrain == null || !_train.GetPosX.HasValue || !_train.GetPosY.HasValue)
            {
                return null;
            }
            return new ObjectParameters(_train.GetPosX.Value, _train.GetPosY.Value, _train.GetWidth, _train.GetHeight);
        }
    }

    public int GetStep => (int)(_train?.EntityTrain?.Step ?? 0);

    public bool TryMoveObject(MovementDirection direction)
    {
        if (_train == null || _train.EntityTrain == null)
        {
            return false;
        }
        return _train.MoveTransport(GetDirectionType(direction));
    }

    /// <summary>
    /// Конвертация из MovementDirection в DirectionType
    /// </summary>
    /// <param name="direction">MovementDirection</param>
    /// <returns>DirectionType</returns>
    private static DirectionType GetDirectionType(MovementDirection direction)
    {
        return direction switch
        {
            MovementDirection.Up => DirectionType.Up,
            MovementDirection.Down => DirectionType.Down,
            MovementDirection.Left => DirectionType.Left,
            MovementDirection.Right => DirectionType.Right,
            _ => DirectionType.Unknown,
        };
    }
}