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//
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#ifndef NVBLASTEXTEXPORTEROBJREADER_H
#define NVBLASTEXTEXPORTEROBJREADER_H
#include <memory>
#include <string>
#include <vector>
#include "NvBlastExtExporter.h"

namespace Nv
{
namespace Blast
{
class Mesh;

class ObjFileReader : public IMeshFileReader
{
public:
	ObjFileReader();
	~ObjFileReader() = default;

	virtual void release() override;

	/*
	Load from the specified file path, returning a mesh or nullptr if failed
	*/
	virtual void loadFromFile(const char* filename) override;
	
	virtual uint32_t getVerticesCount() const override
	{
		return mVertexPositions.size();
	}

	virtual uint32_t getIndicesCount() const override
	{
		return mIndices.size();
	}

	/**
	Check whether file contained an collision geometry
	*/
	virtual bool isCollisionLoaded() override;

	/**
	Retrieve collision geometry if it exist
	*/
	virtual uint32_t getCollision(uint32_t*& hullsOffset, Nv::Blast::CollisionHull**& hulls) override;

	/**
		Get loaded vertex positions
	*/
	virtual NvcVec3* getPositionArray() override;
	/**
		Get loaded vertex normals
	*/
	virtual NvcVec3* getNormalsArray() override;
	/**
		Get loaded vertex uv-coordinates
	*/
	virtual NvcVec2* getUvArray() override;
	/**
		Get loaded triangle indices
	*/
	virtual uint32_t* getIndexArray() override;

	/**
		Get loaded per triangle material ids.
	*/
	int32_t*		getMaterialIds() override { return mPerFaceMatId.data(); };

	/**
		Get loaded per triangle smoothing groups. Currently not supported by OBJ.
	*/ 
	int32_t*		getSmoothingGroups() override { return nullptr; };

	/**
		Get material name.
	*/
	const char*			getMaterialName(int32_t id) override { return mMaterialNames[id].c_str(); }

	/**
		Get material count.
	*/
	int32_t		getMaterialCount() { return mMaterialNames.size(); };

private:
	std::vector<NvcVec3>	mVertexPositions;
	std::vector<NvcVec3>	mVertexNormals;
	std::vector<NvcVec2>	mVertexUv;
	std::vector<uint32_t>		mIndices;

	std::vector<std::string>	mMaterialNames;
	std::vector<int32_t>		mPerFaceMatId;

};

}
}

#endif // NVBLASTEXTEXPORTEROBJREADER_H