/** @file
 *
 * @par History
 */


#include "gameclck.h"

#include <ctime>
#include <string>

#include "../clib/spinlock.h"
#include "../clib/stlutil.h"
#include "globals/uvars.h"
#include "polclock.h"

namespace Pol
{
namespace Core
{
static gameclock_t gameclock;

static time_t last_read;

static Clib::SpinLock _gameclock_lock;

void start_gameclock()
{
  Clib::SpinLockGuard lock( _gameclock_lock );
  std::string gameclock_str;
  if ( gamestate.global_properties->getprop( "gameclock", gameclock_str ) )
  {
    char ch_s;
    ISTRINGSTREAM is( gameclock_str );
    is >> ch_s >> gameclock;
  }
  else
  {
    gameclock = 0;
  }

  last_read = poltime();
}

void update_gameclock()
{
  OSTRINGSTREAM os;
  os << "s" << read_gameclock();
  gamestate.global_properties->setprop( "gameclock", OSTRINGSTREAM_STR( os ) );
}

void stop_gameclock()
{
  update_gameclock();
}

gameclock_t read_gameclock()
{
  Clib::SpinLockGuard lock( _gameclock_lock );
  time_t new_last_read = poltime();
  unsigned int diff = static_cast<unsigned int>( new_last_read - last_read );
  gameclock += diff;
  last_read = new_last_read;
  return gameclock;
}
}
}