//*-- Author :    Damir Buskulic   22/11/01

//////////////////////////////////////////////////////////////////////////
//                                                                      //
// VVirtualFrameChannel                                                 //
//                                                                      //
// Virtual frame channel (ABC for frame channel)                        //
//                                                                      //
//////////////////////////////////////////////////////////////////////////

// need XOPEN for strptime()
#define _XOPEN_SOURCE 1
#define _BSD_SOURCE 1
#     include <time.h>

#include "VVirtualFrameChannel.h"

ClassImp(VVirtualFrameChannel)

//______________________________________________________________________________
VVirtualFrameChannel::VVirtualFrameChannel()
{
// Default constructor for frame channel
   mRefTime.SetTimeD(0);
   mFrameInfoDB = 0;
   mTimerInterval  = 0;
}

//______________________________________________________________________________
VVirtualFrameChannel::~VVirtualFrameChannel()
{
// Default destructor for frame channel
   if (mFrameInfoDB) mFrameInfoDB->Close();
   delete mFrameInfoDB;
}

//______________________________________________________________________________
 Bool_t VVirtualFrameChannel::Connect(char* connectDB, Option_t* openopt)
{
// Connect to the Frame database "connectDB"
   
   if (!mFrameInfoDB) mFrameInfoDB = new VVirtualFrameInfoDB();
   return mFrameInfoDB->Open(connectDB,openopt);
}

//______________________________________________________________________________
 void VVirtualFrameChannel::Disconnect()
{
// Disconnect to the Frame database "connectDB"
   
   if (mFrameInfoDB) {
      mFrameInfoDB->Close();
      delete mFrameInfoDB;
      mFrameInfoDB = 0;
   }
}

//______________________________________________________________________________
 void VVirtualFrameChannel::BuildInfoDB(char* nameDB, char* frameFiles, Option_t* opt)
{
// Builds a new meta info database given frame file path and names
// has to be overloaded
 
   Warning("BuildInfoDB","This function has to be overloaded in derived class");
}

//______________________________________________________________________________
 void VVirtualFrameChannel::SetRefTime(const char* when, Int_t leaps)
{
// Sets the reference time to be the one defined in the string "when"
// this variable has a standard time format : 
//     day/month/Year(full) hour(1-24):min:sec
// for example 12/04/2000 23:45:03
//
// when can be equal to
//  - "now" : In that case, the ref. time set
//           will be the actual time when the command is issued. The user
//           may then try to see what hapened a few minutes/hours/days ago.
//
//  - "start" : In that case, the ref. time set
//           will be the start time of the first frame indexed in the database.
//
// leaps are the leap seconds to be given for conversion to GPS time.
// if you do not know it, set 0 but be warned that the start times of the
// frames you will ask for will probably be shifted by this amount.
// It is around 34 seconds in the beginning of 2000 and grows roughly
// 1s per year.

   struct tm* timeinput;
   timeinput = new tm;
// The string "when" can be "now"
   TString swhen = when;
   if (!swhen.CompareTo("now",TString::kIgnoreCase)) {
      mRefTime.SetTimeD((double)(time(0) + leaps -19 -315964800));
      return;
// The string "when" can be "start"
   } else if (!swhen.CompareTo("start",TString::kIgnoreCase)) {
      mRefTime.SetTimeD(GetStart());
      return;
   }
   
   char* c = strptime(when,"%d/%m/%Y %H:%M:%S",timeinput);
   if (!c) {
      Warning("VFrDatabase","Wrong format for the time string");
      return;
   }
   
   time_t timeoutput = mktime(timeinput);
   mRefTime.SetTimeD((double)(timeoutput + leaps -19 -315964800));
}

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