// File: fobject.h
// Provides: class FObject
//
//  Base class
//  ══════════
//
// ▕▔▔▔▔▔▔▔▔▔▏
// ▕ FObject ▏
// ▕▁▁▁▁▁▁▁▁▁▏

#ifndef _FOBJECT_H
#define _FOBJECT_H

#include <sys/time.h> // need for gettimeofday
#include <cstdlib>
#include <list>
#include <vector>

#include "fevent.h"


#define null NULL

typedef unsigned char  uChar;
typedef unsigned int   uInt;
typedef unsigned long  uLong;
typedef unsigned char  uInt8;
typedef unsigned short uInt16;
typedef unsigned int   uInt32;
typedef u_int64_t      uInt64;

typedef signed int     sInt;
typedef signed long    sLong;
typedef signed char    sInt8;
typedef signed short   sInt16;
typedef signed int     sInt32;
typedef int64_t        sInt64;

typedef long double    lDouble;

//----------------------------------------------------------------------
// class FObject
//----------------------------------------------------------------------

#pragma pack(push)
#pragma pack(1)

class FObject
{
 public:
   struct timer_data
   {
     int       id;
     timeval   interval;
     timeval   timeout;
     FObject*  object;
   };

   // Typedef
   typedef std::list<FObject*> object_list;
   typedef std::vector<timer_data> TimerList;

   // Constructor
   explicit FObject (FObject* = 0);

   // Destructor
   virtual ~FObject();

   // Accessors
   virtual const char* getClassName() const;
   FObject*            getParent() const;
   object_list         getChildren() const;
   int                 numOfChildren() const;

   // Inquiries
   bool                hasParent() const;
   bool                hasChildren() const;
   bool                isTimerInUpdating() const;

   // Methods
   void                removeParent();
   void                addChild (FObject*);
   void                delChild (FObject*);

   // Timer methods
   static void         getCurrentTime (timeval&);
   int                 addTimer (int);
   bool                delTimer (int);
   bool                delOwnTimer();
   bool                delAllTimer();

   // Data Members
   static TimerList* timer_list;

 protected:
   // Event handler
   virtual bool event (FEvent*);
   virtual void onTimer (FTimerEvent*);

 private:
   // Disable copy constructor
   FObject (const FObject&);

   // Disable assignment operator (=)
   FObject& operator = (const FObject&);

   // Data Members
   FObject*     parent_obj;
   object_list  children_list;
   bool         has_parent;
   static bool  timer_modify_lock;
};

#pragma pack(pop)

//----------------------------------------------------------------------
inline const char* FObject::getClassName() const
{ return "FObject"; }

//----------------------------------------------------------------------
inline FObject* FObject::getParent() const
{ return parent_obj; }

//----------------------------------------------------------------------
inline FObject::object_list FObject::getChildren() const
{ return children_list; }

//----------------------------------------------------------------------
inline int FObject::numOfChildren() const
{ return int(children_list.size()); }

//----------------------------------------------------------------------
inline bool FObject::hasParent() const
{ return has_parent; }

//----------------------------------------------------------------------
inline bool FObject::hasChildren() const
{ return bool( ! children_list.empty() ); }

//----------------------------------------------------------------------
inline bool FObject::isTimerInUpdating() const
{ return timer_modify_lock; }

//----------------------------------------------------------------------
inline void FObject::removeParent()
{ parent_obj = 0; }


//----------------------------------------------------------------------
// Operator functions for timeval
//----------------------------------------------------------------------

static inline timeval operator + (const timeval& t1, const timeval& t2)
{
  timeval tmp;
  tmp.tv_sec = t1.tv_sec + t2.tv_sec;

  if ( (tmp.tv_usec = t1.tv_usec + t2.tv_usec) >= 1000000 )
  {
    tmp.tv_sec++;
    tmp.tv_usec -= 1000000;
  }

  return tmp;
}

//----------------------------------------------------------------------
static inline timeval operator - (const timeval& t1, const timeval& t2)
{
  timeval tmp;
  tmp.tv_sec = t1.tv_sec - t2.tv_sec;

  if ( (tmp.tv_usec = t1.tv_usec - t2.tv_usec) < 0 )
  {
    tmp.tv_sec--;
    tmp.tv_usec += 1000000;
  }

  return tmp;
}

//----------------------------------------------------------------------
static inline timeval& operator += (timeval& t1, const timeval& t2)
{
  t1.tv_sec += t2.tv_sec;

  if ( (t1.tv_usec += t2.tv_usec) >= 1000000 )
  {
    t1.tv_sec++;
    t1.tv_usec -= 1000000;
  }

  return t1;
}

//----------------------------------------------------------------------
static inline bool operator < (const timeval& t1, const timeval& t2)
{
  return (t1.tv_sec < t2.tv_sec)
      || (t1.tv_sec == t2.tv_sec && t1.tv_usec < t2.tv_usec);
}

#endif  // _FOBJECT_H