namespace ArmoredVehicle
{
    /// <summary>
    /// Карта с набром объектов под нее
    /// </summary>
    /// <typeparam name="T"></typeparam>
    /// <typeparam name="U"></typeparam>
    internal class MapWithSetMachineGeneric<T, U>
        where T : class, IDrawningObject
        where U : AbstractMap
    {
        /// <summary>
        /// Ширина окна отрисовки
        /// </summary>
        private readonly int _pictureWidth;
        /// <summary>
        /// Высота окна отрисовки
        /// </summary>
        private readonly int _pictureHeight;
        /// <summary>
        /// Размер занимаемого объектом места (ширина)
        /// </summary>
        private readonly int _placeSizeWidth = 210;
        /// <summary>
        /// Размер занимаемого объектом места (высота)
        /// </summary>
        private readonly int _placeSizeHeight = 90;
        /// <summary>
        /// Набор объектов
        /// </summary>
        private readonly SetMachineGeneric<T> _setMachines;
        /// <summary>
        /// Карта
        /// </summary>
        private readonly U _map;
        /// <summary>
        /// Конструктор
        /// </summary>
        /// <param name="picWidth"></param>
        /// <param name="picHeight"></param>
        /// <param name="map"></param>
        public MapWithSetMachineGeneric(int picWidth, int picHeight, U map)
        {
            int width = picWidth / _placeSizeWidth;
            int height = picHeight / _placeSizeHeight;
            _setMachines = new SetMachineGeneric<T>(width * height);
            _pictureWidth = picWidth;
            _pictureHeight = picHeight;
            _map = map;
        }
        
        /// <summary>
        /// Перегрузка оператора сложения
        /// </summary>
        /// <param name="map"></param>
        /// <param name="machine"></param>
        /// <returns></returns>
        public static int operator +(MapWithSetMachineGeneric<T, U> map, T machine)
        {
            return map._setMachines.Insert(machine);
        }
        /// <summary>
        /// Перегрузка оператора вычитания
        /// </summary>
        /// <param name="map"></param>
        /// <param name="position"></param>
        /// <returns></returns>
        public static T operator -(MapWithSetMachineGeneric<T, U> map, int position)
        {
            return map._setMachines.Remove(position);
        }
        /// <summary>
        /// Вывод всего набора объектов
        /// </summary>
        /// <returns></returns>
        public Bitmap ShowSet()
        {
            Bitmap bmp = new(_pictureWidth, _pictureHeight);
            Graphics gr = Graphics.FromImage(bmp);
            DrawBackground(gr);
            DrawMachine(gr);
            return bmp;
        }
        /// <summary>
        /// Просмотр объекта на карте
        /// </summary>
        /// <returns></returns>
        public Bitmap ShowOnMap()
        {
            Shaking();
            foreach (var machine in _setMachines.GetMachine())
            {
                return _map.CreateMap(_pictureWidth, _pictureHeight, machine);
            }
            return new(_pictureWidth, _pictureHeight);
        }
        /// <summary>
        /// Перемещение объекта по крате
        /// </summary>
        /// <param name="direction"></param>
        /// <returns></returns>
        public Bitmap MoveObject(Direction direction)
        {
            if (_map != null)
            {
                return _map.MoveObject(direction);
            }
            return new(_pictureWidth, _pictureHeight);
        }
        /// <summary>
        /// "Взбалтываем" набор, чтобы все элементы оказались в начале
        /// </summary>
        private void Shaking()
        {

            int j = _setMachines.Count - 1;
            for (int i = 0; i < _setMachines.Count; i++)
            {
                if (_setMachines[i] == null)
                {
                    for (; j > i; j--)
                    {
                        var car = _setMachines[j];
                        if (car != null)
                        {
                            _setMachines.Insert(car, i);
                            _setMachines.Remove(j);
                            break;
                        }
                    }
                    if (j <= i)
                    {
                        return;
                    }
                }
            }

        }
        /// <summary>
        /// Метод отрисовки фона
        /// </summary>
        /// <param name="g"></param>
        private void DrawBackground(Graphics g)
        {
            Pen pen = new(Color.LawnGreen, 5);
            for (int i = 0; i < _pictureWidth / _placeSizeWidth; i++)
            {
                for (int j = 0; j < _pictureHeight / _placeSizeHeight + 1; ++j)
                {//линия рамзетки места
                    int dop = 0;
                    if(i>0 && j>0)
                    {
                        dop = 30;
                    }
                    g.DrawRectangle(pen, new Rectangle(i * _placeSizeWidth + dop, j * _placeSizeHeight + dop, i * _placeSizeWidth + _placeSizeWidth, j * _placeSizeHeight + _placeSizeHeight));
                }
            }
        }
        /// <summary>
        /// Метод прорисовки объектов
        /// </summary>
        /// <param name="g"></param>
        private void DrawMachine(Graphics g)
        {
            int width = _pictureWidth / _placeSizeWidth;
            int height = _pictureHeight / _placeSizeHeight;

            int currentWidth = 0;
            int currentHeight = 0;

            foreach (var machine in _setMachines.GetMachine())
            {
                int dop = 0;
                if (currentWidth > 0 && currentHeight > 0)
                {
                    dop = 30;
                }

                machine.SetObject(currentWidth * _placeSizeWidth + dop,
                    currentHeight * _placeSizeHeight + dop,
                    _pictureWidth, _pictureHeight);
                machine?.DrawningObject(g);
                if (currentWidth < width - 1)
                {
                    currentWidth++;
                }
                else
                {
                    currentWidth = 0;
                    currentHeight++;
                }
                if (currentHeight > height) return;

            }

        }
    }
}