// Copyright (C) 2015 Jérôme Leclercq
// This file is part of the "Nazara Engine - Utility module"
// For conditions of distribution and use, see copyright notice in Config.hpp

#pragma once

#ifndef NAZARA_SKELETON_HPP
#define NAZARA_SKELETON_HPP

#include <Nazara/Prerequesites.hpp>
#include <Nazara/Core/ObjectLibrary.hpp>
#include <Nazara/Core/ObjectRef.hpp>
#include <Nazara/Core/RefCounted.hpp>
#include <Nazara/Core/Signal.hpp>
#include <Nazara/Math/Box.hpp>
#include <Nazara/Utility/Joint.hpp>
#include <vector>

class NzSkeleton;

using NzSkeletonConstRef = NzObjectRef<const NzSkeleton>;
using NzSkeletonLibrary = NzObjectLibrary<NzSkeleton>;
using NzSkeletonRef = NzObjectRef<NzSkeleton>;

struct NzSkeletonImpl;

class NAZARA_API NzSkeleton : public NzRefCounted
{
	friend NzJoint;
	friend NzSkeletonLibrary;
	friend class NzUtility;

	public:
		NzSkeleton() = default;
		NzSkeleton(const NzSkeleton& skeleton);
		~NzSkeleton();

		bool Create(unsigned int jointCount);
		void Destroy();

		const NzBoxf& GetAABB() const;
		NzJoint* GetJoint(const NzString& jointName);
		NzJoint* GetJoint(unsigned int index);
		const NzJoint* GetJoint(const NzString& jointName) const;
		const NzJoint* GetJoint(unsigned int index) const;
		NzJoint* GetJoints();
		const NzJoint* GetJoints() const;
		unsigned int GetJointCount() const;
		int GetJointIndex(const NzString& jointName) const;

		void Interpolate(const NzSkeleton& skeletonA, const NzSkeleton& skeletonB, float interpolation);
		void Interpolate(const NzSkeleton& skeletonA, const NzSkeleton& skeletonB, float interpolation, unsigned int* indices, unsigned int indiceCount);

		bool IsValid() const;

		NzSkeleton& operator=(const NzSkeleton& skeleton);

		template<typename... Args> static NzSkeletonRef New(Args&&... args);

		// Signals:
		NazaraSignal(OnSkeletonDestroy, const NzSkeleton*); //< Args: me
		NazaraSignal(OnSkeletonJointsInvalidated, const NzSkeleton*); //< Args: me
		NazaraSignal(OnSkeletonRelease, const NzSkeleton*); //< Args: me

	private:
		void InvalidateJoints();
		void InvalidateJointMap();
		void UpdateJointMap() const;

		static bool Initialize();
		static void Uninitialize();

		NzSkeletonImpl* m_impl = nullptr;

		static NzSkeletonLibrary::LibraryMap s_library;
};

#include <Nazara/Utility/Skeleton.inl>

#endif // NAZARA_SKELETON_HPP