#ifndef WAVEFRONTBRUSHVISITOR_H_
#define WAVEFRONTBRUSHVISITOR_H_

/* greebo: This visits every brush/face and exports it into the given TextFileOutputStream
 *
 * Inherits from BrushVisitor class in radiant/brush.h
 */
#include "../brush/BrushVisit.h"
#include "stream/stringstream.h"
#include "stream/textfilestream.h"

/* Exporterclass which will pass every visit-call to a special formatexporter.
 */
class CExportFormatWavefront: public BrushVisitor
{
		TextFileOutputStream& m_file;

		StringOutputStream vertexbuffer;
		StringOutputStream texcoordbuffer;
		StringOutputStream facebuffer;

		size_t vertices;
		size_t exported;

	public:

		CExportFormatWavefront (TextFileOutputStream& file) :
			m_file(file)
		{
			exported = 0;
			vertices = 0;
		}

		virtual ~CExportFormatWavefront (void)
		{
		}

		void visit (scene::Instance& instance)
		{
			BrushInstance* bptr = Instance_getBrush(instance);
			if (bptr) {
				Brush& brush(bptr->getBrush());
				m_file << "\ng " << brush.name() << exported << "\n";
				brush.forEachFace(*this);
				m_file << vertexbuffer.c_str() << "\n";
				m_file << texcoordbuffer.c_str();
				m_file << facebuffer.c_str() << "\n";
				vertexbuffer.clear();
				texcoordbuffer.clear();
				facebuffer.clear();
				++exported;
			}
		}

		void visit (Face& face) const
		{
			// cast the stupid const away
			const_cast<CExportFormatWavefront*> (this)->visit(face);
		}

		void visit (Face& face)
		{
			size_t v_start = vertices;
			const Winding& w(face.getWinding());
			for (size_t i = 0; i < w.size(); ++i) {
				vertexbuffer << "v " << w[i].vertex.x() << " " << w[i].vertex.y() << " " << w[i].vertex.z() << "\n";
				texcoordbuffer << "vt " << w[i].texcoord.x() << " " << w[i].texcoord.y() << "\n";
				++vertices;
			}

			facebuffer << "\nf";
			for (size_t i = v_start; i < vertices; ++i)
				facebuffer << " " << i + 1 << "/" << i + 1;
		}
}; // class CExportFormatWavefront

#endif /*WAVEFRONTBRUSHVISITOR_H_*/
