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/*===========================================================================*\
 *                                                                           *
 *   $Revision: 1278 $                                                         *
 *   $Date: 2015-06-09 10:58:41 +0200 (Di, 09 Jun 2015) $                   *
 *                                                                           *
\*===========================================================================*/


//=============================================================================
//
//  Implements a reader module for OFF files
//
//=============================================================================


#ifndef __PLYREADER_HH__
#define __PLYREADER_HH__


//=== INCLUDES ================================================================



#include <iosfwd>
#include <string>
#include <cstdio>
#include <vector>

#include <OpenMesh/Core/System/config.h>
#include <OpenMesh/Core/Utils/SingletonT.hh>
#include <OpenMesh/Core/IO/reader/BaseReader.hh>

#ifndef WIN32
#include <string.h>
#endif

//== NAMESPACES ===============================================================


namespace OpenMesh {
namespace IO {


//== FORWARDS =================================================================


class BaseImporter;


//== IMPLEMENTATION ===========================================================


/**
    Implementation of the PLY format reader. This class is singleton'ed by
    SingletonT to OFFReader. It can read custom properties, accessible via the name
    of the custom properties. List properties has the type std::vector<Type>.

*/

class OPENMESHDLLEXPORT _PLYReader_ : public BaseReader
{
public:

  _PLYReader_();

  std::string get_description() const { return "PLY polygon file format"; }
  std::string get_extensions()  const { return "ply"; }
  std::string get_magic()       const { return "PLY"; }

  bool read(const std::string& _filename,
        BaseImporter& _bi,
        Options& _opt);

  bool read(std::istream& _is,
            BaseImporter& _bi,
            Options& _opt);

  bool can_u_read(const std::string& _filename) const;

  enum ValueType {
    Unsupported,
    ValueTypeINT8, ValueTypeCHAR,
    ValueTypeUINT8, ValueTypeUCHAR,
    ValueTypeINT16, ValueTypeSHORT,
    ValueTypeUINT16, ValueTypeUSHORT,
    ValueTypeINT32, ValueTypeINT,
    ValueTypeUINT32, ValueTypeUINT,
    ValueTypeFLOAT32, ValueTypeFLOAT,
    ValueTypeFLOAT64, ValueTypeDOUBLE
  };

private:

  bool can_u_read(std::istream& _is) const;

  bool read_ascii(std::istream& _in, BaseImporter& _bi, const Options& _opt) const;
  bool read_binary(std::istream& _in, BaseImporter& _bi, bool swap, const Options& _opt) const;

  float readToFloatValue(ValueType _type , std::fstream& _in) const;
  template<typename Handle>
  void readCustomProperty(std::istream& _in, BaseImporter& _bi, Handle _h, const std::string& _propName, const ValueType _valueType, const ValueType _listIndexType) const;

  void readValue(ValueType _type , std::istream& _in, float& _value) const;
  void readValue(ValueType _type, std::istream& _in, double& _value) const;
  void readValue(ValueType _type , std::istream& _in, unsigned int& _value) const;
  void readValue(ValueType _type , std::istream& _in, int& _value) const;

  void readInteger(ValueType _type, std::istream& _in, int& _value) const;
  void readInteger(ValueType _type, std::istream& _in, unsigned int& _value) const;

  /// Read unsupported properties in PLY file
  void consume_input(std::istream& _in, int _count) const {
	  _in.read(reinterpret_cast<char*>(&buff[0]), _count);
  }

  mutable unsigned char buff[8];

  /// Available per file options for reading
  mutable Options options_;

  /// Options that the user wants to read
  mutable Options userOptions_;

  mutable unsigned int vertexCount_;
  mutable unsigned int faceCount_;

  mutable ValueType vertexType_;
  mutable uint vertexDimension_;

  enum Property {
    XCOORD,YCOORD,ZCOORD,
    TEXX,TEXY,
    COLORRED,COLORGREEN,COLORBLUE,COLORALPHA,
    XNORM,YNORM,ZNORM, CUSTOM_PROP, VERTEX_INDICES,
    UNSUPPORTED
  };

  /// Stores sizes of property types
  mutable std::map<ValueType, int> scalar_size_;

  // Number of vertex properties
  struct PropertyInfo
  {
    Property       property;
    ValueType      value;
    std::string    name;//for custom properties
    ValueType      listIndexType;//if type is unsupported, the poerty is not a list. otherwise, it the index type
    PropertyInfo():property(UNSUPPORTED),value(Unsupported),name(""),listIndexType(Unsupported){}
    PropertyInfo(Property _p, ValueType _v):property(_p),value(_v),name(""),listIndexType(Unsupported){}
    PropertyInfo(Property _p, ValueType _v, const std::string& _n):property(_p),value(_v),name(_n),listIndexType(Unsupported){}
  };
  mutable std::vector< PropertyInfo > vertexProperties_;
  mutable std::vector< PropertyInfo > faceProperties_;

};


//== TYPE DEFINITION ==========================================================


/// Declare the single entity of the PLY reader
extern _PLYReader_  __PLYReaderInstance;
OPENMESHDLLEXPORT _PLYReader_&  PLYReader();


//=============================================================================
} // namespace IO
} // namespace OpenMesh
//=============================================================================
#endif
//=============================================================================
