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

#pragma once

#ifndef NAZARA_TEXTURE_HPP
#define NAZARA_TEXTURE_HPP

#include <Nazara/Prerequesites.hpp>
#include <Nazara/Core/NonCopyable.hpp>
#include <Nazara/Core/ObjectLibrary.hpp>
#include <Nazara/Core/ObjectRef.hpp>
#include <Nazara/Core/RefCounted.hpp>
#include <Nazara/Core/Resource.hpp>
#include <Nazara/Core/ResourceManager.hpp>
#include <Nazara/Core/Signal.hpp>
#include <Nazara/Renderer/Config.hpp>
#include <Nazara/Renderer/Enums.hpp>
#include <Nazara/Utility/AbstractImage.hpp>
#include <Nazara/Utility/CubemapParams.hpp>
#include <Nazara/Utility/Image.hpp>

class NzTexture;

using NzTextureConstRef = NzObjectRef<const NzTexture>;
using NzTextureLibrary = NzObjectLibrary<NzTexture>;
using NzTextureManager = NzResourceManager<NzTexture, NzImageParams>;
using NzTextureRef = NzObjectRef<NzTexture>;

struct NzTextureImpl;

class NAZARA_RENDERER_API NzTexture : public NzAbstractImage, public NzRefCounted, public NzResource, NzNonCopyable
{
	friend NzTextureLibrary;
	friend NzTextureManager;
	friend class NzRenderer;

	public:
		NzTexture() = default;
		NzTexture(nzImageType type, nzPixelFormat format, unsigned int width, unsigned int height, unsigned int depth = 1, nzUInt8 levelCount = 1);
		explicit NzTexture(const NzImage& image);
		~NzTexture();

		bool Create(nzImageType type, nzPixelFormat format, unsigned int width, unsigned int height, unsigned int depth = 1, nzUInt8 levelCount = 1);
		void Destroy();

		bool Download(NzImage* image) const;

		bool EnableMipmapping(bool enable);

		void EnsureMipmapsUpdate() const;

		unsigned int GetDepth(nzUInt8 level = 0) const;
		nzPixelFormat GetFormat() const;
		unsigned int GetHeight(nzUInt8 level = 0) const;
		nzUInt8 GetLevelCount() const;
		nzUInt8 GetMaxLevel() const;
		unsigned int GetMemoryUsage() const;
		unsigned int GetMemoryUsage(nzUInt8 level) const;
		NzVector3ui GetSize(nzUInt8 level = 0) const;
		nzImageType GetType() const;
		unsigned int GetWidth(nzUInt8 level = 0) const;

		bool HasMipmaps() const;

		void InvalidateMipmaps();
		bool IsValid() const;

		// Load
		bool LoadFromFile(const NzString& filePath, const NzImageParams& params = NzImageParams(), bool generateMipmaps = true);
		bool LoadFromImage(const NzImage& image, bool generateMipmaps = true);
		bool LoadFromMemory(const void* data, std::size_t size, const NzImageParams& params = NzImageParams(), bool generateMipmaps = true);
		bool LoadFromStream(NzInputStream& stream, const NzImageParams& params = NzImageParams(), bool generateMipmaps = true);

		// LoadArray
		bool LoadArrayFromFile(const NzString& filePath, const NzImageParams& imageParams = NzImageParams(), bool generateMipmaps = true, const NzVector2ui& atlasSize = NzVector2ui(2, 2));
		bool LoadArrayFromImage(const NzImage& image, bool generateMipmaps = true, const NzVector2ui& atlasSize = NzVector2ui(2, 2));
		bool LoadArrayFromMemory(const void* data, std::size_t size, const NzImageParams& imageParams = NzImageParams(), bool generateMipmaps = true, const NzVector2ui& atlasSize = NzVector2ui(2, 2));
		bool LoadArrayFromStream(NzInputStream& stream, const NzImageParams& imageParams = NzImageParams(), bool generateMipmaps = true, const NzVector2ui& atlasSize = NzVector2ui(2, 2));

		// LoadCubemap
		bool LoadCubemapFromFile(const NzString& filePath, const NzImageParams& imageParams = NzImageParams(), bool generateMipmaps = true, const NzCubemapParams& cubemapParams = NzCubemapParams());
		bool LoadCubemapFromImage(const NzImage& image, bool generateMipmaps = true, const NzCubemapParams& params = NzCubemapParams());
		bool LoadCubemapFromMemory(const void* data, std::size_t size, const NzImageParams& imageParams = NzImageParams(), bool generateMipmaps = true, const NzCubemapParams& cubemapParams = NzCubemapParams());
		bool LoadCubemapFromStream(NzInputStream& stream, const NzImageParams& imageParams = NzImageParams(), bool generateMipmaps = true, const NzCubemapParams& cubemapParams = NzCubemapParams());

		// LoadFace
		bool LoadFaceFromFile(nzCubemapFace face, const NzString& filePath, const NzImageParams& params = NzImageParams());
		bool LoadFaceFromMemory(nzCubemapFace face, const void* data, std::size_t size, const NzImageParams& params = NzImageParams());
		bool LoadFaceFromStream(nzCubemapFace face, NzInputStream& stream, const NzImageParams& params = NzImageParams());

		bool SetMipmapRange(nzUInt8 minLevel, nzUInt8 maxLevel);

		bool Update(const NzImage& image, nzUInt8 level = 0);
		bool Update(const NzImage& image, const NzBoxui& box, nzUInt8 level = 0);
		bool Update(const NzImage& image, const NzRectui& rect, unsigned int z = 0, nzUInt8 level = 0);
		bool Update(const nzUInt8* pixels, unsigned int srcWidth = 0, unsigned int srcHeight = 0, nzUInt8 level = 0);
		bool Update(const nzUInt8* pixels, const NzBoxui& box, unsigned int srcWidth = 0, unsigned int srcHeight = 0, nzUInt8 level = 0);
		bool Update(const nzUInt8* pixels, const NzRectui& rect, unsigned int z = 0, unsigned int srcWidth = 0, unsigned int srcHeight = 0, nzUInt8 level = 0);

		// Fonctions OpenGL
		unsigned int GetOpenGLID() const;

		static bool IsFormatSupported(nzPixelFormat format);
		static bool IsMipmappingSupported();
		static bool IsTypeSupported(nzImageType type);
		template<typename... Args> static NzTextureRef New(Args&&... args);

		// Signals:
		NazaraSignal(OnTextureDestroy, const NzTexture* /*texture*/);
		NazaraSignal(OnTextureRelease, const NzTexture* /*texture*/);

	private:
		bool CreateTexture(bool proxy);

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

		NzTextureImpl* m_impl = nullptr;

		static NzTextureLibrary::LibraryMap s_library;
		static NzTextureManager::ManagerMap s_managerMap;
		static NzTextureManager::ManagerParams s_managerParameters;
};

#include <Nazara/Renderer/Texture.inl>

#endif // NAZARA_TEXTURE_HPP