// Copyright (C) 2010, Guy Barrand. All rights reserved.
// See the file tools.license for terms.

#ifndef tools_rroot_info
#define tools_rroot_info

//#include "buffer"
//#include "element"
#include "named"
#include "obj_array"
#include "../forit"

namespace tools {
namespace rroot {

class streamer_element : public virtual iro {
  static const std::string& s_store_class() {
    static const std::string s_v("TStreamerElement");
    return s_v;
  }
public:
  static const std::string& s_class() {
    static const std::string s_v("tools::rroot::streamer_element");
    return s_v;
  }
  static cid id_class() {return streamer_element_cid();}
public: //iro
  virtual void* cast(const std::string& a_class) const {
    if(void* p = cmp_cast<streamer_element>(this,a_class)) return p;
    return 0;
  }
  virtual void* cast(cid a_class) const {
    if(void* p = cmp_cast<streamer_element>(this,a_class)) {return p;}
    else return 0;
  }
  virtual const std::string& s_cls() const {return s_class();}
  virtual iro* copy() const {return new streamer_element(*this);}

  virtual bool stream(buffer& a_buffer) {
    short v;
    unsigned int s, c;
    if(!a_buffer.read_version(v,s,c)) return false;
    if(!Named_stream(a_buffer,fName,fTitle)) return false;
    if(!a_buffer.read(fType)) return false;
    if(!a_buffer.read(fSize)) return false;
    if(!a_buffer.read(fArrayLength)) return false;
    if(!a_buffer.read(fArrayDim)) return false;
    if(!a_buffer.read_fast_array<int>(fMaxIndex,5)) return false;
    if(!a_buffer.read(fTypeName)) return false;
    return a_buffer.check_byte_count(s,c,s_store_class());
  }
public:
  virtual void out(std::ostream& aOut) const {
    std::string _fname;
    fullName(_fname);
    char s[128];
    snpf(s,sizeof(s),"  %-14s%-15s offset=%3d type=%2d %-20s",
      fTypeName.c_str(),_fname.c_str(),fOffset,fType,fTitle.c_str());
    aOut << s << std::endl;
  }
public:
  streamer_element()
  :fName(),fTitle(),fType(-1)
  ,fSize(0),fArrayLength(0),fArrayDim(0),fOffset(0)
  ,fTypeName(){
#ifdef TOOLS_MEM
    mem::increment(s_class().c_str());
#endif
    for(int i=0;i<5;i++) fMaxIndex[i] = 0;
  }
  virtual ~streamer_element(){
#ifdef TOOLS_MEM
    mem::decrement(s_class().c_str());
#endif
  }
protected:
  streamer_element(const streamer_element& a_from)
  :iro(a_from)
  ,fName(a_from.fName),fTitle(a_from.fTitle)
  ,fType(a_from.fType),fSize(a_from.fSize)
  ,fArrayLength(a_from.fArrayLength)
  ,fArrayDim(a_from.fArrayDim),fOffset(a_from.fOffset)
  ,fTypeName(a_from.fTypeName){
#ifdef TOOLS_MEM
    mem::increment(s_class().c_str());
#endif
    for(int i=0;i<5;i++) fMaxIndex[i] = a_from.fMaxIndex[i];
  }
  streamer_element& operator=(const streamer_element& a_from){
    fName = a_from.fName;
    fTitle = a_from.fTitle;
    fType = a_from.fType;
    fSize = a_from.fSize;
    fArrayLength = a_from.fArrayLength;
    fArrayDim = a_from.fArrayDim;
    fOffset = a_from.fOffset;
    fTypeName = a_from.fTypeName;
    for(int i=0;i<5;i++) fMaxIndex[i] = a_from.fMaxIndex[i];
    return *this;
  }
public:
  virtual void fullName(std::string& a_s) const {
    a_s = fName;
    for (int i=0;i<fArrayDim;i++) {
      char cdim[32];
      snpf(cdim,sizeof(cdim),"[%d]",fMaxIndex[i]);
      a_s += cdim;
    }
  }
protected: //Named
  std::string fName;
  std::string fTitle;
protected:
  int fType;            //element type
  int fSize;            //sizeof element
  int fArrayLength;     //cumulative size of all array dims
  int fArrayDim;        //number of array dimensions
  int fMaxIndex[5];     //Maximum array index for array dimension "dim"
  int fOffset;          //!element offset in class
  //FIXME Int_t         fNewType;         //!new element type when reading
  std::string fTypeName;        //Data type name of data member
};

class dummy_streamer_element : public streamer_element {
  typedef streamer_element parent;
public: //iro
  virtual iro* copy() const {return new dummy_streamer_element(*this);}
  virtual bool stream(buffer& a_buffer) {
    //the below code skips correctly the data in the file.
    uint32 startpos = a_buffer.length();
    short v;
    unsigned int s,c;
    if(!a_buffer.read_version(v,s,c)) return false;

    if(!parent::stream(a_buffer)) return false;

    a_buffer.set_offset(startpos+c+sizeof(unsigned int));
    if(!a_buffer.check_byte_count(s,c,"dummy_streamer_element")) return false;
    return true;
  }
public:
  dummy_streamer_element(){}
  virtual ~dummy_streamer_element(){}
protected:
  dummy_streamer_element(const dummy_streamer_element& a_from):iro(a_from),parent(a_from){}
  dummy_streamer_element& operator=(const dummy_streamer_element& a_from){
    parent::operator=(a_from);
    return *this;
  }
};

class StreamerInfo : public virtual iro {
  static const std::string& s_store_class() {
    static const std::string s_v("TStreamerInfo");
    return s_v;
  }
public:
  static const std::string& s_class() {
    static const std::string s_v("tools::rroot::StreamerInfo");
    return s_v;
  }
  static cid id_class() {return StreamerInfo_cid();}
public: //iro
  virtual void* cast(const std::string& a_class) const {
    if(void* p = cmp_cast<StreamerInfo>(this,a_class)) return p;
    return 0;
  }
  virtual void* cast(cid a_class) const {
    if(void* p = cmp_cast<StreamerInfo>(this,a_class)) {return p;}
    else return 0;
  }
  virtual const std::string& s_cls() const {return s_class();}
  virtual iro* copy() const {return new StreamerInfo(*this);}

  virtual bool stream(buffer& a_buffer) {
    short v;
    unsigned int s, c;
    if(!a_buffer.read_version(v,s,c)) return false;

    if(!Named_stream(a_buffer,m_name,m_title)) return false;
    if(!a_buffer.read(m_check_sum)) return false;
    if(!a_buffer.read(m_streamed_class_version)) return false;

    //TObjArray        *fElements;       //Array of TStreamerElements
   {obj_array<streamer_element>* obj;
    ifac::args args;
    args[ifac::arg_class()] = (void*)&(streamer_element::s_class());
    if(!pointer_stream(a_buffer,m_fac,args,obj)) {
      a_buffer.out() << "tools::rroot::StreamerInfo::stream : "
                     << "can't read fElements."
                     << std::endl;
      return false;
    }
    if(obj) m_elements.operator=(*obj);
    delete obj;}

    return a_buffer.check_byte_count(s,c,s_store_class());
  }
public:
  void out(std::ostream& a_out) const {
    a_out << "StreamerInfo for class :" 
          << " " << m_name << ", version=" << m_streamed_class_version
          << std::endl;
    tools_vforcit(streamer_element*,m_elements,it) (*it)->out(a_out);
  }
public:
  StreamerInfo(ifac& a_fac)
  :m_fac(a_fac)
  ,m_name()
  ,m_title()
  ,m_check_sum(0)
  ,m_streamed_class_version(0)
  ,m_elements(a_fac,true,true)
  {
#ifdef TOOLS_MEM
    mem::increment(s_class().c_str());
#endif
  }
  virtual ~StreamerInfo(){
#ifdef TOOLS_MEM
    mem::decrement(s_class().c_str());
#endif
  }
protected:
  StreamerInfo(const StreamerInfo& a_from)
  :iro(a_from)
  ,m_fac(a_from.m_fac)
  ,m_name(a_from.m_name)
  ,m_title(a_from.m_name)
  ,m_check_sum(a_from.m_check_sum)
  ,m_streamed_class_version(a_from.m_streamed_class_version)
  ,m_elements(a_from.m_elements)
  {
#ifdef TOOLS_MEM
    mem::increment(s_class().c_str());
#endif
  }
  StreamerInfo& operator=(const StreamerInfo& a_from){
    m_name = a_from.m_name;
    m_title = a_from.m_name;
    m_check_sum = a_from.m_check_sum;
    m_streamed_class_version = a_from.m_streamed_class_version;
    m_elements = a_from.m_elements;
    return *this;
  }  
public:
protected:
  ifac& m_fac;
protected: //Named
  std::string m_name;
  std::string m_title;
protected:
  unsigned int m_check_sum;    //checksum of original class
  int m_streamed_class_version; //Class version identifier
  //int fNumber;               //!Unique identifier
  obj_array<streamer_element> m_elements; //Array of TStreamerElements
};

}}

#endif