#pragma once

#include <string>

#include "types.h"

namespace crepe {

class Mediator;
class Transform;
class Metadata;

/**
 * \brief Represents a GameObject
 *
 * This class represents a GameObject. The GameObject class is only used as an interface for
 * the game programmer. The actual implementation is done in the ComponentManager.
 */
class GameObject {
private:
	/**
	 * This constructor creates a new GameObject. It creates a new Transform and Metadata
	 * component and adds them to the ComponentManager.
	 *
	 * \param mediator Reference to mediator
	 * \param id The id of the GameObject
	 * \param name The name of the GameObject
	 * \param tag The tag of the GameObject
	 * \param position The position of the GameObject
	 * \param rotation The rotation of the GameObject
	 * \param scale The scale of the GameObject
	 */
	GameObject(
		Mediator & mediator, game_object_id_t id, const std::string & name,
		const std::string & tag, const vec2 & position, double rotation, double scale
	);
	//! ComponentManager instances GameObject
	friend class ComponentManager;

protected:
	GameObject(GameObject &&) = default;

	GameObject(const GameObject &) = delete;
	GameObject & operator=(const GameObject &) = delete;
	GameObject & operator=(GameObject &&) = delete;

public:
	//! The id of the GameObject
	const game_object_id_t id;
	//! This entity's transform
	Transform & transform;
	//! This entity's metadata
	Metadata & metadata;

public:
	/**
	 * \brief Set the parent of this GameObject
	 *
	 * This method sets the parent of this GameObject. It sets the parent in the Metadata
	 * component of this GameObject and adds this GameObject to the children list of the parent
	 * GameObject.
	 *
	 * \param parent The parent GameObject
	 */
	void set_parent(const GameObject & parent);
	/**
	 * \brief Add a component to the GameObject
	 *
	 * This method adds a component to the GameObject. It forwards the arguments to the
	 * ComponentManager.
	 *
	 * \tparam T The type of the component
	 * \tparam Args The types of the arguments
	 * \param args The arguments to create the component
	 * \return The created component
	 */
	template <typename T, typename... Args>
	T & add_component(Args &&... args);
	/**
	 * \brief Components will not be deleted if this method is called
	 *
	 * This method sets the persistent flag of the GameObject to true. If the persistent
	 * flag is set to true, the GameObject will not be deleted when the scene is changed.
	 *
	 * \param persistent The persistent flag
	 */
	void set_persistent(bool persistent = true);

protected:
	Mediator & mediator;
};

} // namespace crepe

#include "GameObject.hpp"