#ifndef __MarketHours_h_
#define __MarketHours_h_

#include <time.h>

/* We don't do a great job handling market hours.  The start and end time seem
 * to be spread throughout the Delphi and PHP code, hardcoded everywhere.  This
 * is at attempt at at least identifying all of the cases where we need to know
 * the market hours.
 */

class MarketHours
{ // This class is just a trick to allow people to read values as an inline
  // reference to a simple variable, but to have no ability to change them. 
private:
  static int _open;
  static int _close;
  static int _minutesOfTrading;
public:
  static int open() { return _open; }
  static int close() { return _close; }
  static int minutesOfTrading() { return _minutesOfTrading; }
  static void init();
};

// These are quoted in seconds
#define MARKET_HOURS_MINUTE 60
#define MARKET_HOURS_HOUR (60 * MARKET_HOURS_MINUTE)
#define MARKET_HOURS_OPEN (MarketHours::open())
#define MARKET_HOURS_CLOSE (MarketHours::close())
#define MARKET_HOURS_PERIOD (MARKET_HOURS_MINUTE * 15)
#define MINUTES_OF_TRADING (MarketHours::minutesOfTrading())


inline int secondOfTheDay(time_t time)
{
  struct tm brokenDown;
  localtime_r(&time, &brokenDown);
  return brokenDown.tm_sec 
    + brokenDown.tm_min * MARKET_HOURS_MINUTE 
    + brokenDown.tm_hour * MARKET_HOURS_HOUR;
}

inline time_t midnight(time_t time)
{ // This is imperfect.  Around daylight savings time it will not be right.
  // As long as we are just trying to reset once a day, this should be
  // sufficient.
  return time - secondOfTheDay(time);
}

// This will go forward or backward to the nearest midnight.
inline time_t roundToMidnight(time_t time)
{ return midnight(time + 12 * MARKET_HOURS_HOUR); }

inline time_t nyToLocal(time_t time)
{
  return time - 3 * MARKET_HOURS_HOUR;
}

inline time_t localToNy(time_t time)
{
  return time + 3 * MARKET_HOURS_HOUR;
}

#define MARKET_HOURS_DAY (MARKET_HOURS_HOUR * 24)

#endif