#pragma once

#include "filewatcher.hh"


/*= T_ShaderCode =============================================================*/

struct T_ShaderCode
{
	T_ShaderCode( ) = delete;
	T_ShaderCode( T_ShaderCode const& ) = delete;
	T_ShaderCode( T_ShaderCode&& ) = delete;

	explicit T_ShaderCode( __rd__ const int nparts );
	~T_ShaderCode( );

	void setPart(
			__rd__	const int index ,
			__rd__	char const* const string );
	void setPart(
			__rd__	const int index ,
			__rd__	void const* const data ,
			__rd__	const int size );
	bool loadPart(
			__rd__	const int index ,
			__rd__	std::string const& source ,
			__rw__	std::vector< std::string >& errors );

	GLuint createProgram(
			__rd__	GLenum type ,
			__rw__	std::vector< std::string >& errors ) const;

    private:
	std::vector< char* > code;
};

struct T_ShaderProgram
{
	T_ShaderProgram( ) = delete;
	T_ShaderProgram( T_ShaderProgram const& ) = delete;
	T_ShaderProgram( T_ShaderProgram&& ) = delete;

	T_ShaderProgram( __rd__ GLenum programType );
	~T_ShaderProgram( );

	void addChunk( __rd__ std::string const& string );
	void addFile( __rd__ std::string const& source );

	void load( );
	bool activate( ) const;

	GLuint id( ) const { return program_; }

	static T_ShaderProgram const& FullscreenQuad( );

    private:
	T_WatchedFiles files_;

	std::vector< bool > chunksOrFiles_;
	std::vector< std::string > parts_;

	std::vector< std::string > errors_;

	GLenum programType_;
	GLuint program_;
};