#include "captcha.hpp"

#include <b64/encode.h>
#include <sstream>

#define GIFSIZE 17646
extern "C" {
	const int gifsize = GIFSIZE;
	void captcha( unsigned char im[70*200], unsigned char l[6]);
	void makegif(unsigned char im[70*200], unsigned char gif[gifsize]);
}

struct captcha generateCaptcha( )
{
	struct captcha c;
	unsigned char l[6];
	unsigned char *im = new unsigned char[70*200];
	unsigned char *gif = new unsigned char[gifsize];

	captcha( im, l );

	c.text = std::string( (char *)l );

	std::ostringstream raws( std::stringstream::out | std::stringstream::binary );
	makegif( im, gif );
	raws.write( (char *)gif, gifsize );
	std::string raw = raws.str( );
	
	std::istringstream in( std::ios_base::in | std::ios_base::binary );
	in.str( raw );
	
	base64::encoder E;
	std::string base_s;
	base_s.reserve( 3 * gifsize );
	std::ostringstream base( base_s, std::stringstream::out | std::stringstream::binary );
	E.encode( in, base );
	c.base64 = base.str( );
	
	delete gif;
	delete im;
	
	return c;
}