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

#ifndef tools_sg_field
#define tools_sg_field

#include <ostream>

#include "../scast"
#include "../S_STRING"

#ifdef TOOLS_MEM
#include "../mem"
#endif

namespace tools {
namespace io {
class iwbuf;
class irbuf;
}}

namespace tools {
namespace sg {

class field {
public:
  TOOLS_SCLASS(tools::sg::field)
  virtual void* cast(const std::string& a_class) const {
    if(void* p = cmp_cast<field>(this,a_class)) {return p;}
    else return 0;
  }
  virtual const std::string& s_cls() const = 0;
public:
  virtual bool write(io::iwbuf&) = 0;
  virtual bool read(io::irbuf&) = 0;
  virtual bool dump(std::ostream&) = 0;
  //virtual bool s_value(std::string& a_s) const = 0;
  virtual bool s_value(std::string& a_s) const {a_s.clear();return false;}
protected:
  field():m_touched(true){
#ifdef TOOLS_MEM
    mem::increment(s_class().c_str());
#endif
  }
public:
  virtual ~field(){
#ifdef TOOLS_MEM
    mem::decrement(s_class().c_str());
#endif
  }
protected:
  field(const field&):m_touched(true){
#ifdef TOOLS_MEM
    mem::increment(s_class().c_str());
#endif
  }
  field& operator=(const field&){m_touched=false;return *this;}
public:
  void touch() {m_touched = true;}
  bool touched() const {return m_touched;}
  void reset_touched() {m_touched = false;}
protected:
  bool m_touched;
};

}}

#define TOOLS_FIELD_DESC_NODE_CLASS(a__class) \
  static const std::string s_node_class(#a__class);

#define TOOLS_ADD_FIELD_DESC(a__field) \
  s_v.push_back(tools::sg::field_desc(s_node_class+"."+#a__field,this->a__field.s_cls(),(char*)((tools::sg::field*)&(this->a__field))-(char*)((tools::sg::node*)this),true)); 

#define TOOLS_ADD_FIELD_DESC_NOT_EDITABLE(a__field) \
  s_v.push_back(tools::sg::field_desc(s_node_class+"."+#a__field,this->a__field.s_cls(),(char*)((tools::sg::field*)&(this->a__field))-(char*)((tools::sg::node*)this),false)); 

#define TOOLS_ADD_FIELD_DESC_ENUM(a__key) s_v.back().add_enum(#a__key,a__key);
#define TOOLS_ADD_FIELD_DESC_OPT(a__value) s_v.back().add_opt(a__value);

#endif