#pragma once
#include "texture.hh"
#include "shaders.hh"


enum class E_ODbgMode {
	LDR ,
	LDR_ALPHA ,
	HDR ,
	DEPTH ,
	__COUNT__
};


struct T_OutputDebugger
{
	friend struct T_Texture;

	T_OutputDebugger( );
	NO_COPY( T_OutputDebugger );
	NO_MOVE( T_OutputDebugger );
	~T_OutputDebugger( );

	void registerTexture(
			__rw__ T_Texture& texture ,
			__rd__ const E_ODbgMode mode ,
			__rd__ std::string const& name );

	bool& uiEnabled( )
		{ return enabled_; }
	void makeUI( );

	bool isActive( ) const
		{ return selected_ != -1; }
	void debugOutput( );

    private:
	struct T_Texture_
	{
		GLuint id;
		uint32_t levels;
		E_ODbgMode mode;
		std::string name;
		//
		int submode;
		int lod;
	};

	using F_SubmodeSetup = std::function< void( GLuint ) >;
	struct T_Submode_
	{
		std::string name;
		T_ShaderPipeline pipeline;
		F_SubmodeSetup setup;
	};

	bool enabled_ = false;
	uint32_t nRegistered_ = 0;
	std::vector< T_Texture_ > outputs_;
	std::vector< T_Submode_ > submodes_[ int( E_ODbgMode::__COUNT__ ) ];
	char* smCombo_[ int( E_ODbgMode::__COUNT__ ) ];

	int32_t selected_ = -1;
	char* selectorItems_;
	std::vector< int32_t > selectorMapping_;

	void registerSubmode(
			__rd__ const E_ODbgMode mode ,
			__rd__ std::string const& name ,
			__rd__ std::string const& shader ,
			__rd__ F_SubmodeSetup setup = F_SubmodeSetup( ) );
	void initSubmodeCombo( );

	int32_t registerTexture(
			__rd__ const GLuint id ,
			__rd__ const uint32_t levels ,
			__rd__ const E_ODbgMode mode ,
			__rd__ std::string const& name );
	void unregisterTexture(
			__rd__ const uint32_t index );

	void makeSelectorItems( );
	void clearSelectorItems( );
};