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

namespace Sailboat
{
    class MapWithSetBoatsGeneric<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 SetBoatsGeneric<T> _setBoats;
        private readonly U _map;

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

        public static int operator +(MapWithSetBoatsGeneric<T, U> map, T boat)
        {
            return map._setBoats.Insert(boat);
        }

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

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

        public Bitmap ShowOnMap()
        {
            Shaking();
            foreach (var bus in _setBoats.GetBoats())
            {
                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 = _setBoats.Count - 1;
            for (int i = 0; i < _setBoats.Count; i++)
            {
                if (_setBoats[i] == null)
                {
                    for (; j > i; j--)
                    {
                        var boat = _setBoats[j];
                        if (boat != null)
                        {
                            _setBoats.Insert(boat, i);
                            _setBoats.Remove(j);
                            break;
                        }
                    }
                    if (j <= i)
                    {
                        return;
                    }
                }
            }
        }

        private void DrawBackground(Graphics g)
        {
           Pen pen = new(Color.Brown, 3);
            g.FillRectangle(Brushes.Aqua, 0, 0, _pictureWidth, _pictureHeight);
            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);
            }
        }

        private void DrawBoats(Graphics g)
        {
            int width = _pictureWidth / _placeSizeWidth;
            int height = _pictureHeight / _placeSizeHeight;

            int currentWidth = 0;
            int currentHeight = 0;

            foreach (var boat in _setBoats.GetBoats())
            {

                boat?.SetObject(currentWidth * _placeSizeWidth,
                    currentHeight * _placeSizeHeight,
                    _pictureWidth, _pictureHeight);
                boat?.DrawingObject(g);

                if (currentWidth < width - 1)
                {
                    currentWidth++;
                }
                else
                {
                    currentHeight++;
                    currentWidth = 0;
                }
                if (currentHeight > height) return;
            }
        }
    }
}