/*

Open Asset Import Library (assimp)

----------------------------------------------------------------------

Copyright (c) 2006-2026, assimp team

All rights reserved.

Redistribution and use of this software in source and binary forms,

with or without modification, are permitted provided that the

following conditions are met:

* Redistributions of source code must retain the above

  copyright notice, this list of conditions and the

  following disclaimer.

* Redistributions in binary form must reproduce the above

  copyright notice, this list of conditions and the

  following disclaimer in the documentation and/or other

  materials provided with the distribution.

* Neither the name of the assimp team, nor the names of its

  contributors may be used to endorse or promote products

  derived from this software without specific prior

  written permission of the assimp team.

THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS

"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT

LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR

A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT

OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,

SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT

LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,

DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY

THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT

(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE

OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

----------------------------------------------------------------------*/

#ifndef OBJFILEMTLIMPORTER_H_INC

#define OBJFILEMTLIMPORTER_H_INC

#include <assimp/defs.h>

#include <string>

#include <vector>

#include "Common/Maybe.h"

struct aiColor3D;

struct aiString;

namespace Assimp {

namespace ObjFile {

struct Model;

struct Material;

} // namespace ObjFile

/**

 *  @class  ObjFileMtlImporter

 *  @brief  Loads the material description from a mtl file.

 */

class ObjFileMtlImporter {

public:

    static const size_t BUFFERSIZE = 2048;

    using DataArray = std::vector<char>;

    using DataArrayIt = std::vector<char>::iterator;

    using ConstDataArrayIt = std::vector<char>::const_iterator;

    //! \brief  The class default constructor

    ObjFileMtlImporter(std::vector<char> &buffer, const std::string &strAbsPath,

            ObjFile::Model *pModel);

    //! \brief  The class destructor

    ~ObjFileMtlImporter() = default;

    ObjFileMtlImporter(const ObjFileMtlImporter &rOther) = delete;

    ObjFileMtlImporter &operator=(const ObjFileMtlImporter &rOther) = delete;

private:

    /// Load the whole material description

    void load();

    /// Get color data.

    void getColorRGBA(aiColor3D *pColor);

    void getColorRGBA(Maybe<aiColor3D> &value);

    /// Get illumination model from loaded data

    void getIlluminationModel(int &illum_model);

    /// Gets a float value from data.

    void getFloatValue(ai_real &value);

    void getFloatValue(Maybe<ai_real> &value);

    void getFloatIfMaterialValid(ai_real ObjFile::Material::*member);

    void getFloatIfMaterialValid(Maybe<ai_real> ObjFile::Material::*member);

    /// Creates a new material from loaded data.

    void createMaterial();

    /// Get texture name from loaded data.

    void getTexture();

    void getTextureOption(bool &clamp, int &clampIndex, aiString *&out);

private:

    //! Absolute pathname

    std::string m_strAbsPath;

    //! Data iterator showing to the current position in data buffer

    DataArrayIt m_DataIt;

    //! Data iterator to end of buffer

    DataArrayIt m_DataItEnd;

    //! USed model instance

    ObjFile::Model *m_pModel;

    //! Current line in file

    unsigned int m_uiLine;

    //! Helper buffer

    std::vector<char> m_buffer;

};

} // Namespace Assimp

#endif // OBJFILEMTLIMPORTER_H_INC