using ProjectTank.DrawningObjects;
using ProjectTank.MovementStrategy;

namespace ProjectTank.Generics
{
    /// <summary>
    /// Параметризованный класс для набора объектов DrawningCar
    /// </summary>
    /// <typeparam name="T"></typeparam>
    /// <typeparam name="U"></typeparam>
    internal class TanksGenericCollection<T, U> where T : DrawningTankBase where U : IMoveableObject
    {
        /// <summary>
        /// Ширина окна прорисовки
        /// </summary>
        private readonly int _pictureWidth;
        /// <summary>
        /// Высота окна прорисовки
        /// </summary>
        private readonly int _pictureHeight;
        /// <summary>
        /// Размер занимаемого объектом места (ширина)
        /// </summary>
        private readonly int _placeSizeWidth = 150;
        /// <summary>
        /// Размер занимаемого объектом места (высота)
        /// </summary>
        private readonly int _placeSizeHeight = 100;
        /// <summary>
        /// Набор объектов
        /// </summary>
        private readonly SetGeneric<T> _collection;
        /// <summary>
        /// Конструктор
        /// </summary>
        /// <param name="picWidth"></param>
        /// <param name="picHeight"></param>
        public TanksGenericCollection(int picWidth, int picHeight)
        {
            int width = picWidth / _placeSizeWidth;
            int height = picHeight / _placeSizeHeight;
            _pictureWidth = picWidth;
            _pictureHeight = picHeight;
            _collection = new SetGeneric<T>(width * height);
        }
        /// <summary>
        /// Перегрузка оператора сложения
        /// </summary>
        /// <param name="collect"></param>
        /// <param name="obj"></param>
        /// <returns></returns>
        public static int operator +(TanksGenericCollection<T,U> collect, T? obj)
        {
            if (obj == null) return -1;
            return collect?._collection.Insert(obj) ?? -1;
        }
        /// <summary>
        /// Перегрузка оператора вычитания
        /// </summary>
        /// <param name="collect"></param>
        /// <param name="pos"></param>
        /// <returns></returns>
        public static bool operator -(TanksGenericCollection<T, U> collect, int pos)
        {
            T? obj = collect._collection.Get(pos);
            
            if (obj != null) return collect._collection.Remove(pos);
            return false;
        }
        
        /// <summary>
        /// Получение объекта IMoveableObject
        /// </summary>
        /// <param name="pos"></param>
        /// <returns></returns>
        public U? GetU(int pos)
        {
            return (U?)_collection.Get(pos)?.GetMoveableObject;
        }
        /// <summary>
        /// Вывод всего набора объектов
        /// </summary>
        /// <returns></returns>
        public Bitmap ShowTanks()
        {
            Bitmap bmp = new(_pictureWidth, _pictureHeight);
            Graphics gr = Graphics.FromImage(bmp);
            DrawBackground(gr);
            DrawObjects(gr);
            return bmp;
        }
        /// <summary>
        /// Метод отрисовки фона
        /// </summary>
        /// <param name="g"></param>
        private void DrawBackground(Graphics g)
        {
            Pen pen = new(Color.Black, 3);

            for (int i = 0; i < _pictureWidth / _placeSizeWidth; i++)
            {
                for (int j = 0; j < _pictureHeight / _placeSizeHeight + 1; ++j)
                {
                    //линия рамзетки места
                    g.DrawLine(pen, i * _placeSizeWidth, j * _placeSizeHeight, i * _placeSizeWidth + _placeSizeWidth / 2, j * _placeSizeHeight);
                }
                g.DrawLine(pen, i * _placeSizeWidth, 0, i * _placeSizeWidth, _pictureHeight / _placeSizeHeight * _placeSizeHeight);
            }
        }
        /// <summary>
        /// Метод прорисовки объектов
        /// </summary>
        /// <param name="g"></param>
        private void DrawObjects(Graphics g)
        {
            for (int i = 0; i < _collection.Count; i++)
            {
                DrawningTankBase tank = _collection.Get(i);
                if (tank != null)
                {
                    int columnsCount = _pictureHeight / _placeSizeHeight + 1;

                    int colIndex = i % columnsCount;
                    int rowIndex = i / columnsCount;
                    
                    tank.SetPosition(colIndex * _placeSizeWidth + 2, rowIndex * _placeSizeHeight + 2);
                    tank.DrawTransport(g);
                }
            }
        }
    }
}