using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace Artilleries
{
    internal class MapWithSetArtilleriesGeneric<T, U>
        where T : class, IDrawingObject
        where U : AbstractMap
    {
        private readonly int _pictureWidth;
        private readonly int _pictureHeight;
        private readonly int _placeSizeWidth = 210;
        private readonly int _placeSizeHeight = 90;
        private readonly SetArtilleriesGeneric<T> _setArtilleries;
        private readonly U _map;

        public MapWithSetArtilleriesGeneric(int picWidth, int picHeight, U map)
        {
            int width = picWidth / _placeSizeWidth;
            int height = picHeight / _placeSizeHeight;
            _setArtilleries = new SetArtilleriesGeneric<T>(width * height);
            _pictureWidth = picWidth;
            _pictureHeight = picHeight;
            _map = map;
        }

        public static bool operator +(MapWithSetArtilleriesGeneric<T, U> map, T artillery)
        {
            return map._setArtilleries.Insert(artillery); // TODO
        }

        public static bool operator -(MapWithSetArtilleriesGeneric<T, U> map, int position)
        {
            return map._setArtilleries.Remove(position); // TODO
        }

        public Bitmap ShowSet()
        {
            Bitmap bmp = new(_pictureWidth, _pictureHeight);
            Graphics gr = Graphics.FromImage(bmp);
            DrawBackground(gr);
            DrawArtilleries(gr);
            return bmp;
        }

        public Bitmap ShowOnMap()
        {
            Shaking();
            for (int i = 0; i < _setArtilleries.Count; i++)
            {
                var car = _setArtilleries.Get(i);
                if (car != null)
                {
                    return _map.CreateMap(_pictureWidth, _pictureHeight, car);
                }
            }
            return new(_pictureWidth, _pictureHeight);
        }

        public Bitmap MoveObject(Direction direction)
        {
            if (_map != null)
            {
                return _map.MoveObject(direction);
            }
            return new(_pictureWidth, _pictureHeight);
        }

        private void Shaking()
        {
            int j = _setArtilleries.Count - 1;
            for (int i = 0; i < _setArtilleries.Count; i++)
            {
                if (_setArtilleries.Get(i) == null)
                {
                    for (; j > i; j--)
                    {
                        var car = _setArtilleries.Get(j);
                        if (car != null)
                        {
                            _setArtilleries.Insert(car, i);
                            _setArtilleries.Remove(j);
                            break;
                        }
                    }
                    if (j <= i)
                    {
                        return;
                    }
                }
            }
        }

        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)
                {// TODO
                    g.DrawLine(pen, i * _placeSizeWidth, j * _placeSizeHeight, i *
                   _placeSizeWidth + _placeSizeWidth / 2, j * _placeSizeHeight);
                }
                g.DrawLine(pen, i * _placeSizeWidth, 0, i * _placeSizeWidth,
               (_pictureHeight / _placeSizeHeight) * _placeSizeHeight);
            }
        }

        private void DrawArtilleries(Graphics g)
        {
            for (int i = 0; i < _setArtilleries.Count; i++)
            {
                // TODO установка позиции
                _setArtilleries.Get(i)?.DrawingObject(g);
            }
        }
    }
}