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

public abstract class AbstractMap {
    private IDrawningObject _drawningObject = null;
    protected int[][] _map = null;
    protected int _width;
    protected int _height;
    protected float _size_x;
    protected float _size_y;
    protected final Random _random = new Random();
    protected final int _freeRoad = 0;
    protected final int _barrier = 1;

    public Image CreateMap(int width, int height, IDrawningObject drawningObject)
    {
        _width = width;
        _height = height;
        _drawningObject = drawningObject;
        do {
            GenerateMap();
        } while (!SetObjectOnMap());
        return DrawMapWithObject();
    }

    public Image MoveObject(Direction direction)
    {
        _drawningObject.moveObject(direction);
        if (objectIntersects()) {
            switch (direction) {
                case Left -> _drawningObject.moveObject(Direction.Right);
                case Right -> _drawningObject.moveObject(Direction.Left);
                case Up -> _drawningObject.moveObject(Direction.Down);
                case Down -> _drawningObject.moveObject(Direction.Up);
            }
        }
        return DrawMapWithObject();
    }

    private boolean SetObjectOnMap()
    {
        if (_drawningObject == null || _map == null)
        {
            return false;
        }

        int x = _random.nextInt(0, 10);
        int y = _random.nextInt(0, 10);
        _drawningObject.setObject(x, y, _width, _height);

        var Location = _drawningObject.getCurrentPosition();

        if (objectIntersects()){
            int startLocX = (int)(Location[0] / _size_x);
            int startLocY = (int)(Location[2] / _size_y);
            int endLocX = (int)(Location[1] / _size_x);
            int endLocY = (int)(Location[3] / _size_y);
            for (int j = startLocX; j <= endLocX; j++)
            {
                for (int i = startLocY; i <= endLocY; i++)
                {
                    if (_map[i][j] == _barrier) _map[i][j] = _freeRoad;
                }
            }
        }

        return true;
    }

    private boolean objectIntersects() {
        float[] location = _drawningObject.getCurrentPosition();
        Rectangle self = new Rectangle((int) location[0], (int) location[2], (int) location[1] - (int) location[0], (int) location[3] - (int) location[2]);
        for (int i = 0; i < _map.length; i++)
        {
            for (int j = 0; j < _map[i].length; j++)
            {
                if (_map[i][j] == _barrier)
                {
                    if (self.intersects(new Rectangle(j * (int) _size_x, i * (int) _size_y, (int) _size_x, (int) _size_y)))
                    {
                        return true;
                    }
                }
            }
        }

        return false;
    }

    private Image DrawMapWithObject() {
        Image img = new BufferedImage(_width, _height, BufferedImage.TYPE_INT_ARGB);
        if (_drawningObject == null || _map == null) {
            return img;
        }
        Graphics2D g = (Graphics2D) img.getGraphics();
        for (int i = 0; i < _map.length; ++i)
        {
            for (int j = 0; j < _map[i].length; ++j)
            {
                if (_map[i][j] == _freeRoad)
                {
                    DrawRoadPart(g, i, j);
                } else if (_map[i][j] == _barrier)
                {
                    DrawBarrierPart(g, i, j);
                }
            }
        }
        _drawningObject.drawningObject(g);
        return img;
    }

    protected abstract void GenerateMap();
    protected abstract void DrawRoadPart(Graphics2D g, int i, int j);
    protected abstract void DrawBarrierPart(Graphics2D g, int i, int j);
}