// Copyright (C) 2022 Jérôme "Lynix" Leclercq (lynix680@gmail.com)
// This file is part of the "Nazara Engine - Graphics module"
// For conditions of distribution and use, see copyright notice in Config.hpp

#pragma once

#ifndef NAZARA_GRAPHICS_HPP
#define NAZARA_GRAPHICS_HPP

#include <Nazara/Prerequisites.hpp>
#include <Nazara/Graphics/Config.hpp>
#include <Nazara/Graphics/Material.hpp>
#include <Nazara/Graphics/MaterialInstance.hpp>
#include <Nazara/Graphics/MaterialPassRegistry.hpp>
#include <Nazara/Graphics/TextureSamplerCache.hpp>
#include <Nazara/Renderer/RenderDevice.hpp>
#include <Nazara/Renderer/RenderPassCache.hpp>
#include <Nazara/Renderer/RenderPipelineLayout.hpp>
#include <Nazara/Renderer/Renderer.hpp>
#include <NZSL/FilesystemModuleResolver.hpp>
#include <optional>

namespace Nz
{
	class RenderBuffer;

	class NAZARA_GRAPHICS_API Graphics : public ModuleBase<Graphics>
	{
		friend ModuleBase;

		public:
			using Dependencies = TypeList<Renderer>;

			struct Config;
			struct DefaultMaterials;
			struct DefaultTextures;

			Graphics(Config config);
			~Graphics();

			inline const std::shared_ptr<RenderPipeline>& GetBlitPipeline(bool transparent) const;
			inline const std::shared_ptr<RenderPipelineLayout>& GetBlitPipelineLayout() const;
			inline const DefaultMaterials& GetDefaultMaterials() const;
			inline const DefaultTextures& GetDefaultTextures() const;
			inline MaterialPassRegistry& GetMaterialPassRegistry();
			inline const MaterialPassRegistry& GetMaterialPassRegistry() const;
			inline MaterialInstanceLoader& GetMaterialInstanceLoader();
			inline const MaterialInstanceLoader& GetMaterialInstanceLoader() const;
			inline MaterialLoader& GetMaterialLoader();
			inline const MaterialLoader& GetMaterialLoader() const;
			inline PixelFormat GetPreferredDepthFormat() const;
			inline PixelFormat GetPreferredDepthStencilFormat() const;
			inline const std::shared_ptr<RenderDevice>& GetRenderDevice() const;
			inline const RenderPassCache& GetRenderPassCache() const;
			inline TextureSamplerCache& GetSamplerCache();
			inline const std::shared_ptr<nzsl::FilesystemModuleResolver>& GetShaderModuleResolver() const;

			struct Config
			{
				RenderDeviceFeatures forceDisableFeatures;
				bool useDedicatedRenderDevice = true;
			};

			struct DefaultMaterials
			{
				std::shared_ptr<Material> basicMaterial;
				std::shared_ptr<Material> phongMaterial;
				std::shared_ptr<Material> pbrMaterial;

				std::shared_ptr<MaterialInstance> basicDefault;
				std::shared_ptr<MaterialInstance> basicNoDepth;
				std::shared_ptr<MaterialInstance> basicTransparent;
			};

			struct DefaultTextures
			{
				std::array<std::shared_ptr<Texture>, ImageTypeCount> depthTextures;
				std::array<std::shared_ptr<Texture>, ImageTypeCount> whiteTextures;
			};

		private:
			void BuildBlitPipeline();
			void BuildDefaultMaterials();
			void BuildDefaultTextures();
			void RegisterMaterialPasses();
			void RegisterShaderModules();
			template<std::size_t N> void RegisterEmbedShaderModule(const UInt8(&content)[N]);
			void SelectDepthStencilFormats();

			std::optional<RenderPassCache> m_renderPassCache;
			std::optional<TextureSamplerCache> m_samplerCache;
			std::shared_ptr<nzsl::FilesystemModuleResolver> m_shaderModuleResolver;
			std::shared_ptr<RenderDevice> m_renderDevice;
			std::shared_ptr<RenderPipeline> m_blitPipeline;
			std::shared_ptr<RenderPipeline> m_blitPipelineTransparent;
			std::shared_ptr<RenderPipelineLayout> m_blitPipelineLayout;
			DefaultMaterials m_defaultMaterials;
			DefaultTextures m_defaultTextures;
			MaterialInstanceLoader m_materialInstanceLoader;
			MaterialLoader m_materialLoader;
			MaterialPassRegistry m_materialPassRegistry;
			PixelFormat m_preferredDepthFormat;
			PixelFormat m_preferredDepthStencilFormat;

			static Graphics* s_instance;
	};
}

#include <Nazara/Graphics/Graphics.inl>

#endif // NAZARA_GRAPHICS_HPP