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

namespace Catamaran
{
    /// <summary>
    /// Карта с набром объектов под нее
    /// </summary>
    /// <typeparam name="T"></typeparam>
    /// <typeparam name="U"></typeparam>
    internal class MapWithSetBoatsGeneric<T, U>
        where T : class, IDrawingObject
        where U : AbstractMap
    {
        /// <summary>
        /// Ширина окна отрисовки
        /// </summary>
        private readonly int _pictureWidth;
        /// <summary>
        /// Высота окна отрисовки
        /// </summary>
        private readonly int _pictureHeight;
        /// <summary>
        /// Размер занимаемого объектом места (ширина)
        /// </summary>
        private readonly int _placeSizeWidth = 210;
        /// <summary>
        /// Размер занимаемого объектом места (высота)
        /// </summary>
        private readonly int _placeSizeHeight = 90;
        /// <summary>
        /// Набор объектов
        /// </summary>
        private readonly SetBoatsGeneric<T> _setBoats;
        /// <summary>
        /// Карта
        /// </summary>
        private readonly U _map;
        /// <summary>
        /// Конструктор
        /// </summary>
        /// <param name="picWidth"></param>
        /// <param name="picHeight"></param>
        /// <param name="map"></param>
        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;
        }
        /// <summary>
        /// Перегрузка оператора сложения
        /// </summary>
        /// <param name="map"></param>
        /// <param name="Boat"></param>
        /// <returns></returns>
        public static int operator +(MapWithSetBoatsGeneric<T, U> map, T Boat)
        {
            return map._setBoats.Insert(Boat);
        }
        /// <summary>
        /// Перегрузка оператора вычитания
        /// </summary>
        /// <param name="map"></param>
        /// <param name="position"></param>
        /// <returns></returns>
        public static T operator -(MapWithSetBoatsGeneric<T, U> map, int position)
        {
            return map._setBoats.Remove(position);
        }
        /// <summary>
        /// Вывод всего набора объектов
        /// </summary>
        /// <returns></returns>
        public Bitmap ShowSet()
        {
            Bitmap bmp = new Bitmap(_pictureWidth, _pictureHeight);
            Graphics gr = Graphics.FromImage(bmp);
            DrawBackground(gr);
            DrawBoats(gr);
            return bmp;
        }
        /// <summary>
        /// Просмотр объекта на карте
        /// </summary>
        /// <returns></returns>
        public Bitmap ShowOnMap()
        {
            Shaking();
            foreach (var boat in _setBoats.GetBoats())
            {
                return _map.CreateMap(_pictureWidth, _pictureHeight, boat);
            }
            return new Bitmap(_pictureWidth, _pictureHeight);
        }
        /// <summary>
        /// Перемещение объекта по крате
        /// </summary>
        /// <param name="direction"></param>
        /// <returns></returns>
        public Bitmap MoveObject(Direction direction)
        {
            if (_map != null)
            {
                return _map.MoveObject(direction);
            }
            return new Bitmap(_pictureWidth, _pictureHeight);
        }
        /// <summary>
        /// "Взбалтываем" набор, чтобы все элементы оказались в начале
        /// </summary>
        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;
                    }
                }
            }
        }
        /// <summary>
        /// Метод отрисовки фона
        /// </summary>
        /// <param name="g"></param>
        private void DrawBackground(Graphics g)
        {
            Pen pen = new Pen(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);
                    for (int k = 0; k < 7; k++)
                    {
                        g.DrawEllipse(pen, i * _placeSizeWidth + 15 * k, j * _placeSizeHeight, 15, 15);
                        g.DrawEllipse(pen, i * _placeSizeWidth + 15 * k, j * _placeSizeHeight - 15, 15, 15);
                    }
                }
                g.DrawLine(pen, i * _placeSizeWidth, 0, i * _placeSizeWidth, (_pictureHeight / _placeSizeHeight) * _placeSizeHeight);
                for (int k = 0; k < 6 * 4; k++)
                {
                    g.DrawEllipse(pen, i * _placeSizeWidth, 0 + 15 * k, 15, 15);
                }
            }
        }
        /// <summary>
        /// Метод прорисовки объектов
        /// </summary>
        /// <param name="g"></param>
        private void DrawBoats(System.Drawing.Graphics g)
        {
            int numberOfSeatsInWidth = _pictureWidth / _placeSizeWidth;
            int numberOfSeatsInHeight = _pictureHeight / _placeSizeHeight;
            int bottomLine = (numberOfSeatsInHeight - 1) * _placeSizeHeight;
            for (int i = 0; i < _setBoats.Count; i++)
            {
                // TODO установка позиции
                _setBoats[i]?.SetObject(i % numberOfSeatsInWidth * _placeSizeWidth, bottomLine - i / numberOfSeatsInWidth * _placeSizeHeight, _pictureWidth, _pictureHeight);
                _setBoats[i]?.DrawingObject(g);
            }
        }
    }
}