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 int operator +(MapWithSetArtilleriesGeneric<T, U> map, T artillery)
        {
            return map._setArtilleries.Insert(artillery);
        }

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

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

        public Bitmap ShowOnMap()
        {
            Shaking();
            foreach (var artillery in _setArtilleries.GetArtilleries())
            {
                return _map.CreateMap(_pictureWidth, _pictureHeight, artillery);
            }
            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[i] == null)
                {
                    for (; j > i; j--)
                    {
                        var car = _setArtilleries[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);
            Brush boxBrush = new SolidBrush(Color.DarkGreen);
            Pen thinPen = new Pen(Color.Black, 2);
            Brush flagBrush = new SolidBrush(Color.Red);
            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 / 2, j * _placeSizeHeight);
                    g.FillRectangle(boxBrush, i * _placeSizeWidth + 5, j * _placeSizeHeight + _placeSizeHeight * 3 / 4 - 5, _placeSizeWidth / 3 - 5, _placeSizeHeight / 3 - 5);
                    g.DrawLine(thinPen, i * _placeSizeWidth + 5, j * _placeSizeHeight + _placeSizeHeight * 3 / 4 - 5, i * _placeSizeWidth + _placeSizeWidth / 3, j * _placeSizeHeight + _placeSizeHeight * 3 / 4 + _placeSizeHeight / 3 - 10);
                    g.DrawLine(thinPen, i * _placeSizeWidth + 5, j * _placeSizeHeight + _placeSizeHeight * 3 / 4 + _placeSizeHeight / 3 - 10, i * _placeSizeWidth + _placeSizeWidth / 3, j * _placeSizeHeight + _placeSizeHeight * 3 / 4 - 5);
                    g.FillRectangle(flagBrush, i * _placeSizeWidth + _placeSizeWidth * 5 / 12, j * _placeSizeHeight + _placeSizeHeight * 5 / 8 - 5, _placeSizeWidth / 5, _placeSizeHeight / 5);
                    g.DrawLine(thinPen, i * _placeSizeWidth + _placeSizeWidth * 5 / 12, j * _placeSizeHeight + _placeSizeHeight - 5, i * _placeSizeWidth + _placeSizeWidth * 5 / 12, j * _placeSizeHeight + _placeSizeHeight * 5 / 8 - 5);
                }
                g.DrawLine(pen, i * _placeSizeWidth, 0, i * _placeSizeWidth, (_pictureHeight / _placeSizeHeight) * _placeSizeHeight);
            }
        }

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

            int index = 0;
            foreach (var artillery in _setArtilleries.GetArtilleries())
            {
                artillery.SetObject(index % width * _placeSizeWidth + 10, (height - 1 - index / width) * _placeSizeHeight + 10, _pictureWidth, _pictureHeight);
                artillery.DrawingObject(g);
                index++;
            }
        }
    }
}