#pragma once

#include <set>

#include "PaintDevice.h"

class Engine
{
public:
    enum class ErrorCode
    {
        success = 0,
        paint_device_not_ready
    };

    virtual ~Engine() = default;

    ErrorCode run();

protected:
    void track_key(int key);

    void untrack_key(int key);

    PaintDevice& paint_device()
    {
        return m_PaintDevice;
    }

    virtual bool end() const = 0;

    virtual void on_button_press(
            int button
    ) = 0;

    virtual void update(
            int dt
    ) = 0;

    virtual void render(
            PaintDevice& paintDevice
    ) = 0;

private:
    void updateInput();

    PaintDevice m_PaintDevice;

    std::set<int> m_TrackedKeys;
};