#pragma once
#ifndef _NB_GRID
#define _NB_GRID

#include <exception>

#include "Draw.h"

namespace NB{

class ConwayGridError : std::runtime_error {
public:
    ConwayGridError(const std::string&);
};

struct Vec2 {
    float x;
    float y;
};

enum Cell : unsigned char {
    Dead = 0,
    Alive = 1
};

class ConwayGrid {
public:
    typedef std::vector<std::vector<Cell>> CellGrid;

    ConwayGrid(const Shader&, unsigned int m=2, unsigned int n=2, Vec2 bl={-1, -1}, Vec2 tr={1, 1});
    
    CellGrid getCells() const;
    
    void setCells(const CellGrid&);
    Cell& at(unsigned int, unsigned int);
    void calcNext();
    void sendCells();
    void draw();
    void click(double, double);

private:
    unsigned int _m, _n;
    Vec2 _bl, _tr, _cell_size;
    std::vector<float> _cell_verts;
    std::vector<float> _cell_offsets;
    DrawInstanceBuffer _buffer;
    CellGrid _cells;
};

}

#endif