//+------------------------------------------------------------------+
//|                                                    BarSeries.mqh  |
//|                                                                  |
//|                      KnitPkg for MetaTrader                        |
//|                                                                  |
//|                          MIT License                             |
//|                    Copyright (c) 2025 Douglas Rechia             |
//|                                                                  |
//|  Typed series implementations for individual bar components.     |
//|  Each class wraps a specific OHLCV field via the ITimeSeries<T>      |
//|  interface.                                                      |
//|                                                                  |
//+------------------------------------------------------------------+

#include "Bar.mqh"

//+------------------------------------------------------------------+
//| BaseBarTimeSeries — generic template base for bar series
//+------------------------------------------------------------------+
template<typename T>
class BaseBarTimeSeries : public ITimeSeries<T>
  {
protected:
   IBar*             m_bar;
public:
                     BaseBarTimeSeries(IBar *bar) { m_bar = bar; }
   virtual T         ValueAtShift(int shift = 0) = 0;
   int               Size() { return m_bar.Size(); }
  };

//+------------------------------------------------------------------+
//| BarTimeSeries — datetime series accessor
//+------------------------------------------------------------------+
class BarTimeSeries : public BaseBarTimeSeries<datetime>
  {
public:
                     BarTimeSeries(IBar *bar) : BaseBarTimeSeries(bar) {}
   virtual datetime  ValueAtShift(int shift = 0)       { return m_bar.Time(shift); };
  };

//+------------------------------------------------------------------+
//| BarOpenTimeSeries — open price series accessor
//+------------------------------------------------------------------+
class BarOpenTimeSeries : public BaseBarTimeSeries<double>
  {
public:
                     BarOpenTimeSeries(IBar *bar) : BaseBarTimeSeries(bar) {}
   virtual double    ValueAtShift(int shift = 0)       { return m_bar.Open(shift); };
  };

//+------------------------------------------------------------------+
//| BarHighTimeSeries — high price series accessor
//+------------------------------------------------------------------+
class BarHighTimeSeries : public BaseBarTimeSeries<double>
  {
public:
                     BarHighTimeSeries(IBar *bar) : BaseBarTimeSeries(bar) {}
   virtual double    ValueAtShift(int shift = 0)       { return m_bar.High(shift); };
  };

//+------------------------------------------------------------------+
//| BarLowTimeSeries — low price series accessor
//+------------------------------------------------------------------+
class BarLowTimeSeries : public BaseBarTimeSeries<double>
  {
public:
                     BarLowTimeSeries(IBar *bar) : BaseBarTimeSeries(bar) {}
   virtual double    ValueAtShift(int shift = 0)       { return m_bar.Low(shift); };
  };

//+------------------------------------------------------------------+
//| BarCloseTimeSeries — close price series accessor
//+------------------------------------------------------------------+
class BarCloseTimeSeries : public BaseBarTimeSeries<double>
  {
public:
                     BarCloseTimeSeries(IBar *bar) : BaseBarTimeSeries(bar) {}
   virtual double    ValueAtShift(int shift = 0)       { return m_bar.Close(shift); };
  };

//+------------------------------------------------------------------+
//| BarVolumeTimeSeries — real volume series accessor
//+------------------------------------------------------------------+
class BarVolumeTimeSeries : public BaseBarTimeSeries<long>
  {
public:
                     BarVolumeTimeSeries(IBar *bar) : BaseBarTimeSeries(bar) {}
   virtual long      ValueAtShift(int shift = 0)       { return m_bar.Volume(shift); };
  };

//+------------------------------------------------------------------+
//| BarTickVolumeTimeSeries — tick volume series accessor
//+------------------------------------------------------------------+
class BarTickVolumeTimeSeries : public BaseBarTimeSeries<long>
  {
public:
                     BarTickVolumeTimeSeries(IBar *bar) : BaseBarTimeSeries(bar) {}
   virtual long      ValueAtShift(int shift = 0)       { return m_bar.TickVolume(shift); };
  };

//+------------------------------------------------------------------+