using Cruiser.MovementStrategy;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using Cruiser.Drawing;

namespace Cruiser.Generics
{
    /// <summary>
    /// Параметризованный класс для набора объектов DrawingCruiser
    /// </summary>
    /// <typeparam name="T"></typeparam>
    /// <typeparam name="U"></typeparam>
    internal class CarsGenericCollection<T, U>
    where T : DrawingCruiser
    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 = 160;
        /// <summary>
        /// Размер занимаемого объектом места (высота)
        /// </summary>
        private readonly int _placeSizeHeight = 60;
        /// <summary>
        /// Набор объектов
        /// </summary>
        private readonly SetGeneric<T> _collection;
        /// <summary>
        /// Конструктор
        /// </summary>
        /// <param name="picWidth"></param>
        /// <param name="picHeight"></param>
        public CarsGenericCollection(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 bool operator +(CarsGenericCollection<T, U> collect, T? obj)
        {
            if (obj == null)
            {
                return false;
            }
            return collect._collection.Insert(obj);
        }
        /// <summary>
        /// Перегрузка оператора вычитания
        /// </summary>
        /// <param name="collect"></param>
        /// <param name="pos"></param>
        /// <returns></returns>
        public static T? operator -(CarsGenericCollection<T, U> collect, int pos)
        {
            T? obj = collect._collection[pos];
            if (obj != null)
            {
                collect._collection.Remove(pos);
            }
            return obj;
        }
        /// <summary>
        /// Получение объекта IMoveableObject
        /// </summary>
        /// <param name="pos"></param>
        /// <returns></returns>
        public U? GetU(int pos)
        {
            return (U?)_collection[pos]?.GetMoveableObject;
        }
        /// <summary>
        /// Вывод всего набора объектов
        /// </summary>
        /// <returns></returns>
        public Bitmap ShowCruiser()
        {
            Bitmap bmp = new(_pictureWidth, _pictureHeight);
            Graphics gr = Graphics.FromImage(bmp);
            DrawObjects(gr);
            DrawBackground(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; j++) 
                {
                    g.DrawRectangle(pen, i * _placeSizeWidth, j * _placeSizeHeight, _placeSizeWidth, _placeSizeHeight);
                }
                
            }
        }
        /// <summary>
        /// /// Метод прорисовки объектов
        /// </summary>
        /// <param name="g"></param>
        private void DrawObjects(Graphics g)
        {
            int Ix = 0;
            int Iy = 0;
            int i = 0;
            foreach (var cruiser in _collection.GetCruisers())
            {
                _collection[i]?.SetPosition(Ix, Iy);
                _collection[i]?.DrawTransport(g);
                Ix += _placeSizeWidth;
                if (Ix + _placeSizeHeight > _pictureWidth) 
                {
                    Ix = 0;
                    Iy = _placeSizeHeight;
                }
                i++;
            }
        }
    }

}