using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using DumpTruck.DrawingObjects;
using DumpTruck.MovementStrategy;

namespace DumpTruck.Generics
{
    /// <summary>
    /// Параметризованный класс для набора объектов DrawingTruck
    /// </summary>
    /// <typeparam name="T"></typeparam>
    /// <typeparam name="U"></typeparam>
    internal class TrucksGenericCollection<T, U>
    where T : DrawingTruck
    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 = 180;
        /// <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 TrucksGenericCollection(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 +(TrucksGenericCollection<T, U> collect, T? obj)
        {
            if (obj == null)
            {
                return -1;
            }
            return collect._collection.Insert(obj);
        }
		/// <summary>
		/// Перегрузка оператора вычитания
		/// </summary>
		/// <param name="collect"></param>
		/// <param name="pos"></param>
		/// <returns></returns>
		public static T? operator -(TrucksGenericCollection<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 ShowTrucks()
        {
            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)
        {
            int index = 0;
            foreach (var truck in _collection.GetTrucks())
            {     
                if (truck != null)
                {
					truck.SetPosition(index % (_pictureWidth / _placeSizeWidth) * _placeSizeWidth, index / (_pictureWidth / _placeSizeWidth) * _placeSizeHeight);
					truck.DrawTransport(g);
                }
                index++;
            }
        }
    }
}