using WarmlyLocomotive.Entities;

namespace WarmlyLocomotive.Drawnings;
/// <summary>
/// Класс, отвечающий за прорисовку и перемещение объекта-сущности
/// </summary>
public class DrawningLocomotive
{
    /// <summary>
    /// Класс-сущность
    /// </summary>
    public EntityLocomotive? EntityLocomotive { get; protected set; }
    /// <summary>
    /// Ширина окна
    /// </summary>
    private int? _pictureWidth;
    /// <summary>
    /// Высота окна
    /// </summary>
    private int? _pictureHeight;
    /// <summary>
    /// Левая координата прорисовки паровоза
    /// </summary>
    protected int? _startPosX;
    /// <summary>
    /// Верхняя кооридната прорисовки паровоза
    /// </summary>
    protected int? _startPosY;
    /// <summary>
    /// Ширина прорисовки паровоза
    /// </summary>
    private readonly int _drawningLocomotiveWidth = 150;
    /// <summary>
    /// Высота прорисовки паровоза
    /// </summary>
    private readonly int _drawningLocomotiveHeight = 70;

    /// <summary>
    /// Координата X объекта
    /// </summary>
    public int? GetPosX => _startPosX;

    /// <summary>
    /// Координата Y объекта
    /// </summary>
    public int? GetPosY => _startPosY;

    /// <summary>
    /// Ширина объекта
    /// </summary>
    public int GetWidth => _drawningLocomotiveWidth;

    /// <summary>
    /// Высота объекта
    /// </summary>
    public int GetHeight => _drawningLocomotiveHeight;


    /// <summary>
    /// Пустой конструктор
    /// </summary>
    private DrawningLocomotive()
    {
        _pictureWidth = null;
        _pictureHeight = null;
        _startPosX = null;
        _startPosY = null;
    }

    /// <summary>
    /// Конструктор
    /// </summary>
    /// <param name="speed">Скорость</param>
    /// <param name="weight">Вес</param>
    /// <param name="bodyColor">Основной цвет</param>
    public DrawningLocomotive(int speed, double weight, Color bodyColor) : this()
    {
        EntityLocomotive = new EntityLocomotive(speed, weight, bodyColor);
    }

    /// <summary>
    /// Конструктор для наследников
    /// </summary>
    /// <param name="drawningLocomotiveWidth">Ширина прорисовки паровоза</param>
    /// <param name="drawningLocomotiveHeight">Высота прорисовки паровоза</param>
    protected DrawningLocomotive(int drawningLocomotiveWidth, int drawningLocomotiveHeight) : this()
    {
        _drawningLocomotiveWidth = drawningLocomotiveWidth;
        _pictureHeight = drawningLocomotiveHeight;
    }

    /// <summary>
    /// Установка границ поля
    /// </summary>

    public bool SetPictureSize(int width, int height)
    {
        if (width > _drawningLocomotiveWidth && height > _drawningLocomotiveHeight)
        {
            _pictureWidth = width;
            _pictureHeight = height;

            //todo
            if (_startPosX != null && _startPosY != null)
            {
                //проверка х
                if (_startPosX.Value + _drawningLocomotiveWidth > _pictureWidth)
                {
                    _startPosX = _pictureWidth - _drawningLocomotiveWidth;
                }
                else if (_startPosX.Value < 0)
                {
                    _startPosX = 0;
                }

                //проверка у
                if (_startPosY.Value + _drawningLocomotiveHeight > _pictureHeight)
                {
                    _startPosY = _pictureHeight - _drawningLocomotiveHeight;
                }
                else if (_startPosY.Value < 0)
                {
                    _startPosY = 0;
                }

            }
            return true;
        }
        return false;

    }
    /// <summary>
    /// Установка позиции
    /// </summary>

    public void SetPosition(int x, int y)
    {
        if (!_pictureHeight.HasValue || !_pictureWidth.HasValue)
        {
            return;
        }

        //проверка у
        if (y + _drawningLocomotiveHeight > _pictureHeight)
        {
            _startPosY = _pictureHeight - _drawningLocomotiveHeight;
        }
        else if (y < 0)
        {
            _startPosY = 0;
        }
        else
        {
            _startPosY = y;
        }

        //проверка х
        if (x + _drawningLocomotiveWidth > _pictureWidth)
        {
            _startPosX = _pictureWidth - _drawningLocomotiveWidth;
        }
        else if (x < 0)
        {
            _startPosX = 0;
        }
        else
        {
            _startPosX = x;
        }

    }
    /// <summary>
    /// Изменение направления перемещения
    /// </summary>

    public bool MoveTransport(DirectionType direction)
    {
        if (EntityLocomotive == null || !_startPosX.HasValue || !_startPosY.HasValue)
        {
            return false;
        }
        switch (direction)
        {
            //влево
            case DirectionType.Left:
                if (_startPosX.Value - EntityLocomotive.Step > 0)
                {
                    _startPosX -= (int)EntityLocomotive.Step;
                }
                return true;
            //вверх
            case DirectionType.Up:
                if (_startPosY.Value - EntityLocomotive.Step > 0)
                {
                    _startPosY -= (int)EntityLocomotive.Step;
                }
                return true;
            // вправо
            case DirectionType.Right:
                if (_startPosX.Value + EntityLocomotive.Step + _drawningLocomotiveWidth < _pictureWidth)
                {
                    _startPosX += (int)EntityLocomotive.Step;
                }
                return true;
            //вниз
            case DirectionType.Down:
                if (_startPosY.Value + EntityLocomotive.Step + _drawningLocomotiveHeight < _pictureHeight)
                {
                    _startPosY += (int)EntityLocomotive.Step;
                }
                return true;
            default:
                return false;
        }
    }
    /// <summary>
    /// Прорисовка объекта
    /// </summary>

    public virtual void DrawTransport(Graphics g)
    {
        if (EntityLocomotive == null || !_startPosX.HasValue || !_startPosY.HasValue)
        {
            return;
        }
        Pen pen = new(Color.Black);

        //локомотив
        Brush br = new SolidBrush(EntityLocomotive.BodyColor);
        Brush blBr = new SolidBrush(Color.Black);
        g.DrawRectangle(pen, _startPosX.Value, _startPosY.Value + 30, 140, 20);
        g.FillRectangle(br, _startPosX.Value, _startPosY.Value + 30, 140, 20);
        Point point1 = new Point(_startPosX.Value, _startPosY.Value + 30);
        Point point2 = new Point(_startPosX.Value + 20, _startPosY.Value);
        Point point3 = new Point(_startPosX.Value + 140, _startPosY.Value);
        Point point4 = new Point(_startPosX.Value + 140, _startPosY.Value + 30);
        Point[] body = { point1, point2, point3, point4 };
        g.DrawPolygon(pen, body);
        g.FillPolygon(br, body);
        g.DrawRectangle(pen, _startPosX.Value + 140, _startPosY.Value + 10, 10, 40);
        g.FillRectangle(br, _startPosX.Value + 140, _startPosY.Value + 10, 10, 40);

        //колеса
        g.DrawEllipse(pen, _startPosX.Value, _startPosY.Value + 50, 20, 20);
        g.FillEllipse(blBr, _startPosX.Value, _startPosY.Value + 50, 20, 20);
        g.DrawEllipse(pen, _startPosX.Value + 30, _startPosY.Value + 50, 20, 20);
        g.FillEllipse(blBr, _startPosX.Value + 30, _startPosY.Value + 50, 20, 20);
        g.DrawEllipse(pen, _startPosX.Value + 90, _startPosY.Value + 50, 20, 20);
        g.FillEllipse(blBr, _startPosX.Value + 90, _startPosY.Value + 50, 20, 20);
        g.DrawEllipse(pen, _startPosX.Value + 120, _startPosY.Value + 50, 20, 20);
        g.FillEllipse(blBr, _startPosX.Value + 120, _startPosY.Value + 50, 20, 20);


    }
}