scene_manager.h

#pragma once

#include "util/shared_ptr.h"
#include "util/vector.h"
#include "util/queue.h"
#include "core/scene/entity.h"
#include "renderer/cameras/camera.h"

namespace blowbox
{
    class SceneManager
    {
        friend class BlowboxCore;
        friend class EntityFactory;
        friend class Entity;
    public:
        SceneManager();

        ~SceneManager();

    protected:
        void Startup();

        void Update();

        void PostUpdate();

        void Shutdown();

        void AddEntity(SharedPtr<Entity> entity);

        void RemoveEntity(SharedPtr<Entity> entity);

    public:
        SharedPtr<Entity> GetRootEntity();

        Vector<SharedPtr<Entity>>& GetEntities();

        const Vector<SharedPtr<Entity>>& GetEntities() const;

        void SetMainCamera(SharedPtr<Camera> camera);

        SharedPtr<Camera> GetMainCamera();

    private:
        SharedPtr<Entity> root_entity_;                     
        Vector<SharedPtr<Entity>> all_entities_;            

        Queue<SharedPtr<Entity>> entities_to_be_added_;     
        Queue<SharedPtr<Entity>> entities_to_be_removed_;   

        SharedPtr<Camera> main_camera_;                     
    };
}