#ifndef SCENENODE_H
#define SCENENODE_H

#include "command.h"
#include <vector>
#include <memory>
#include <SFML/Graphics.hpp>

class SceneNode;
using SceneNodeUPtr = std::unique_ptr<SceneNode>;
using SceneNodeSPtr = std::shared_ptr<SceneNode>;
using SceneNodeConstSPtr = std::shared_ptr<const SceneNode>;

class SceneNode : public std::enable_shared_from_this<SceneNode>,
        public sf::Transformable,
        public sf::Drawable,
        private sf::NonCopyable
{
public:
    explicit SceneNode();
    virtual ~SceneNode();

    bool attachChild(const SceneNodeSPtr &child);
    SceneNodeSPtr detachChild(const SceneNode& node);

    sf::Transform getWorldTransform() const;
    sf::Vector2f  getWorldPosition() const;

    void update(const sf::Time& dt);
    void onCommand(const Command& command, const sf::Time& dt);

    virtual Category::Type category() const;

private:
    std::vector<SceneNodeSPtr> vec_children;
    SceneNodeSPtr parent;

    virtual void draw(sf::RenderTarget& target, sf::RenderStates states) const override final;
    virtual void drawCurrent(sf::RenderTarget& target, sf::RenderStates states) const;
    virtual void updateCurrent(const sf::Time& dt);

    void updateChildren(const sf::Time& dt);
};

#endif // SCENENODE_H