import java.awt.*;
import java.awt.image.BufferedImage;
import java.util.LinkedList;

public class MapWithSetLocomotivesGeneric
        <T extends IDrawningObject, U extends AbstractMap>
{
    /// Ширина окна отрисовки
    private final int _pictureWidth;
    /// Высота окна отрисовки
    private final int _pictureHeight;
    /// Размер занимаемого объектом места (ширина)
    private final int _placeSizeWidth = 210;
    /// Размер занимаемого объектом места (высота)
    private final int _placeSizeHeight = 90;

    /// Набор объектов
    //TODO переделал на public, узнать так ли вообще надо?
    public final SetLocomotivesGeneric<T> _setLocomotives;

    // Список удаленных объектов
    LinkedList<DrawningObjectLocomotive> deletedLocomotives = new LinkedList<>();

    public DrawningObjectLocomotive getDeleted() {
        if (deletedLocomotives.isEmpty()) return null;
        return deletedLocomotives.removeFirst();
    }
    /// Карта
    private final U _map;
    /// Конструктор
    public MapWithSetLocomotivesGeneric(int picWidth, int picHeight, U map)
    {
        int width = picWidth / _placeSizeWidth;
        int height = picHeight / _placeSizeHeight;
        _setLocomotives = new SetLocomotivesGeneric<T>(width * height);
        _pictureWidth = picWidth;
        _pictureHeight = picHeight;
        _map = map;
    }

    /// Добавление
    public int Plus(T locomotive)
    {
        return this._setLocomotives.Insert(locomotive);
    }
    /// Удаление
    public T Minus(int position)
    {
        T temp = this._setLocomotives.Remove(position);
        if (temp == null) return null;
        if (temp instanceof DrawningObjectLocomotive) deletedLocomotives.add((DrawningObjectLocomotive) temp);
        return temp;
    }
    /// Вывод всего набора объектов
    public BufferedImage ShowSet()
    {
        BufferedImage bmp = new BufferedImage(_pictureWidth, _pictureHeight, BufferedImage.TYPE_INT_RGB);
        Graphics gr = bmp.getGraphics();
        DrawBackground((Graphics2D)gr);
        DrawLocomotives((Graphics2D)gr);
        return bmp;
    }

    /// Просмотр объекта на карте
    public BufferedImage ShowOnMap()
    {
        Shaking();
        for (var locomotive : _setLocomotives.GetLocomotives())
        {
            if (locomotive != null)
            {
                return _map.CreateMap(_pictureWidth, _pictureHeight, locomotive);
            }
        }
        return new BufferedImage(_pictureWidth, _pictureHeight, BufferedImage.TYPE_INT_RGB);
    }

    /// Перемещение объекта по крате
    public BufferedImage MoveObject(Direction direction)
    {
        if (_map != null)
        {
            return _map.MoveObject(direction);
        }
        return new BufferedImage(_pictureWidth, _pictureHeight, BufferedImage.TYPE_INT_RGB);
    }

    /// "Взбалтываем" набор, чтобы все элементы оказались в начале
    private void Shaking()
    {
        int j = _setLocomotives.Count() - 1;
        for (int i = 0; i < _setLocomotives.Count(); i++)
        {
            if (_setLocomotives.Get(i) == null)
            {
                for (; j > i; j--)
                {
                    var locomotive = _setLocomotives.Get(j);
                    if (locomotive != null)
                    {
                        _setLocomotives.Insert(locomotive, i);
                        _setLocomotives.Remove(j);
                        break;
                    }
                }
                if (j <= i)
                {
                    return;
                }
            }
        }
    }

    /// Метод отрисовки фона
    private void DrawBackground(Graphics2D g)
    {
        g.setColor(Color.WHITE);
        g.fillRect(0,0,600, 500);
        for (int j = _placeSizeHeight; j < _pictureHeight; j+= _placeSizeHeight)
        {
            //нижняя линия рельс
            g.setColor(Color.BLACK);
            g.setStroke(new BasicStroke(5));

            g.drawLine(0, j, _pictureWidth, j);
            for (int i = 0; i < _pictureWidth; i+=20)
            {
                g.drawLine(i, j, i, j + 10);
            }
            g.drawLine(0, j + 10, _pictureWidth, j + 10);

            //верхняя линия рельс

            g.setColor(Color.GRAY);

            g.drawLine(0, j - 20, _pictureWidth, j - 20);
            for (int i = 0; i < _pictureWidth; i += 20)
            {
                g.drawLine(i, j - 20, i, j - 10);
            }
            g.drawLine(0, j - 10, _pictureWidth, j - 10);

            //фонари
            for (int i = _placeSizeWidth; i < _pictureWidth; i += _placeSizeWidth)
            {
                g.setColor(Color.BLACK);
                g.setStroke(new BasicStroke(10));
                g.drawLine(i, j - _placeSizeHeight + 20, i, j);
                g.setColor(Color.YELLOW);
                g.setStroke(new BasicStroke(20));
                g.drawLine(i, j - _placeSizeHeight + 18, i, j - _placeSizeHeight + 38);
            }
        }
        g.setStroke(new BasicStroke(2));
    }

    /// Метод прорисовки объектов
    private void DrawLocomotives(Graphics2D g)
    {
        int width = _pictureWidth / _placeSizeWidth;
        int height = _pictureHeight / _placeSizeHeight;

        int curWidth = 0;
        int curHeight = 0;

        for (var locomotive : _setLocomotives.GetLocomotives())
        {
            // установка позиции
            if (locomotive != null) locomotive.SetObject(curWidth * _placeSizeWidth + 10, curHeight * _placeSizeHeight + 18, _pictureWidth, _pictureHeight);
            if (locomotive != null) locomotive.DrawningObject(g);
            if (curWidth < width) curWidth++;
            else
            {
                curWidth = 0;
                curHeight++;
            }
        }
    }

}