/*
Open Asset Import Library (assimp)
----------------------------------------------------------------------

Copyright (c) 2006-2016, 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 OBJ_FILEPARSER_H_INC
#define OBJ_FILEPARSER_H_INC

#include <vector>
#include <string>
#include <map>
#include <assimp/vector2.h>
#include <assimp/vector3.h>
#include <assimp/mesh.h>

namespace Assimp {

namespace ObjFile {
    struct Model;
    struct Object;
    struct Material;
    struct Point3;
    struct Point2;
}

class ObjFileImporter;
class IOSystem;
class ProgressHandler;

/// \class  ObjFileParser
/// \brief  Parser for a obj waveform file
class ObjFileParser {
public:
    typedef std::vector<char> DataArray;
    typedef std::vector<char>::iterator DataArrayIt;
    typedef std::vector<char>::const_iterator ConstDataArrayIt;

public:
    /// \brief  Constructor with data array.
    ObjFileParser(const std::vector<char> &Data,const std::string &strModelName, IOSystem* io, ProgressHandler* progress);
    /// \brief  Destructor
    ~ObjFileParser();
    /// \brief  Model getter.
    ObjFile::Model *GetModel() const;

private:
    /// Parse the loaded file
    void parseFile();
    /// Method to copy the new delimited word in the current line.
    bool getNextFloat(ConstDataArrayIt &dataIt, const ConstDataArrayIt dataItEnd, float &result);
    /// Method to copy the new line.
    void copyNextLine(std::vector<char> &buffer, ConstDataArrayIt &dataIt, const ConstDataArrayIt dataItEnd);
    /// Stores the vector
    void getVector( std::vector<aiVector3D> &point3d_array, ConstDataArrayIt &dataIt, const ConstDataArrayIt dataItEnd);
    /// Stores the following 3d vector.
    void getVector3(std::vector<aiVector3D> &point3d_array, ConstDataArrayIt &dataIt, const ConstDataArrayIt dataItEnd);
    /// Stores the following 3d vector.
    void getVector2(std::vector<aiVector2D> &point2d_array, ConstDataArrayIt &dataIt, const ConstDataArrayIt dataItEnd);
    /// Stores the following face.
    void getFace(aiPrimitiveType type, ConstDataArrayIt &dataIt, const ConstDataArrayIt dataItEnd);
    /// Reads the material description.
    void getMaterialDesc(ConstDataArrayIt &dataIt, const ConstDataArrayIt dataItEnd);
    /// Gets a a material library.
    void getMaterialLib(ConstDataArrayIt &dataIt, const ConstDataArrayIt dataItEnd);
    /// Creates a new material.
    void getNewMaterial(ConstDataArrayIt &dataIt, const ConstDataArrayIt dataItEnd);
    /// Gets the group name from file.
    void getGroupName(ConstDataArrayIt &dataIt, const ConstDataArrayIt dataItEnd);
    /// Gets the group number from file.
    void getGroupNumber();
    /// Gets the group number and resolution from file.
    void getGroupNumberAndResolution();
    /// Returns the index of the material. Is -1 if not material was found.
    int getMaterialIndex( const std::string &strMaterialName );
    /// Parse object name
    void getObjectName(ConstDataArrayIt &dataIt, const ConstDataArrayIt dataItEnd);
    /// Creates a new object.
    void createObject( const std::string &strObjectName );
    /// Creates a new mesh.
    void createMesh( const std::string &meshName );
    /// Returns true, if a new mesh instance must be created.
    bool needsNewMesh( const std::string &rMaterialName );
    /// Error report in token
    void reportErrorTokenInFace();

private:
    // Copy and assignment constructor should be private
    // because the class contains pointer to allocated memory
    ObjFileParser(const ObjFileParser& rhs);
    ObjFileParser& operator=(const ObjFileParser& rhs);

    /// Default material name
    static const std::string DEFAULT_MATERIAL;
    //! Data buffer
    const std::vector<char> &m_DataBuffer;
    //! Pointer to model instance
    ObjFile::Model *m_pModel;
    //! Current line (for debugging)
    unsigned int m_uiLine;
    /// Pointer to IO system instance.
    IOSystem *m_pIO;
    //! Pointer to progress handler
    ProgressHandler* m_progress;
    /// Path to the current model
};

}   // Namespace Assimp

#endif