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

namespace WinFormsApp1
{
    internal class MapWithSetTraktorGeneric<T, U>
            where T : class, IDrawningObject
            where U : AbstractMap
    {
        private readonly int _pictureWidth;
        private readonly int _pictureHeight;
        private readonly int _placeSizeWidth = 250;
        private readonly int _placeSizeHeight = 250;
        private readonly SetTraktorGeneric<T> _setTraktors;
        private readonly U _map;

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

        public static int operator +(MapWithSetTraktorGeneric<T, U> map, T bus)
        {
            return map._setTraktors.Insert(bus);
        }

        public static T operator -(MapWithSetTraktorGeneric<T, U> map, int position)
        {
            return map._setTraktors.Remove(position);
        }

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

        public Bitmap ShowOnMap()
        {
            Shaking();
            for (int i = 0; i < _setTraktors.Count; i++)
            {
                var bus = _setTraktors.Get(i);
                if (bus != null)
                {
                    return _map.CreateMap(_pictureWidth, _pictureHeight, bus);
                }
            }
            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 = _setTraktors.Count - 1;
            for (int i = 0; i < _setTraktors.Count; i++)
            {
                if (_setTraktors.Get(i) == null)
                {
                    for (; j > i; j--)
                    {
                        var bus = _setTraktors.Get(j);
                        if (bus != null)
                        {
                            _setTraktors.Insert(bus, i);
                            _setTraktors.Remove(j);
                            break;
                        }
                    }
                    if (j <= i)
                    {
                        return;
                    }
                }
            }
        }

        private void DrawBackground(Graphics g)
        {
            Pen pen = new(Color.Black, 3);
            Brush brush = new SolidBrush(Color.LightSlateGray);
            g.FillRectangle(brush, 0, 0, _pictureWidth, _pictureHeight);
            for (int i = 0; i <= _pictureWidth / _placeSizeWidth; i++)
            {
                for (int j = 0; j <= _pictureHeight / _placeSizeHeight + 1; ++j)
                {
                    g.DrawLine(pen, i * _placeSizeWidth, j * _placeSizeHeight, i * _placeSizeWidth + _placeSizeWidth, j * _placeSizeHeight);
                    g.DrawLine(pen, i * _placeSizeWidth, j * _placeSizeHeight + 10, i * _placeSizeWidth + _placeSizeWidth, j * _placeSizeHeight + 10);
                }
                g.DrawLine(pen, i * _placeSizeWidth, 0, i * _placeSizeWidth, (_pictureHeight / _placeSizeHeight) * _placeSizeHeight);
            }
        }

        private void DrawTraktors(Graphics g)
        {
            int widthEl = _pictureWidth / _placeSizeWidth;
            int heightEl = _pictureHeight / _placeSizeHeight;

            int curWidth = 0;
            int curHeight = 0;

            for (int i = _setTraktors.Count; i >= 0; i--)
            {
                _setTraktors.Get(i)?.SetObject(
                    _pictureWidth - _placeSizeWidth * curWidth - 60,
                    curHeight * _placeSizeHeight + 30, _pictureWidth, _pictureHeight);
                _setTraktors.Get(i)?.DrawningObject(g);

                if (curWidth < widthEl)
                    curWidth++;
                else
                {
                    curWidth = 1;
                    curHeight++;
                }
                if (curHeight > heightEl)
                {
                    return;
                }

            }
        }
    }
}