/* -------------------------------------------------------------------------
 * BKG NTRIP Server
 * -------------------------------------------------------------------------
 *
 * Class:      bncRtnetUploadCaster
 *
 * Purpose:    Connection to NTRIP Caster
 *
 * Author:     L. Mervart
 *
 * Created:    29-Mar-2011
 *
 * Changes:    
 *
 * -----------------------------------------------------------------------*/

#include <math.h>
#include "bncrtnetuploadcaster.h" 
#include "bncsettings.h"
#include "bncephuser.h"
#include "bncclockrinex.h"
#include "bncsp3.h"

using namespace std;

// Constructor
////////////////////////////////////////////////////////////////////////////
bncRtnetUploadCaster::bncRtnetUploadCaster(const QString& mountpoint,
                                 const QString& outHost, int outPort,
                                 const QString& password, 
                                 const QString& crdTrafo, bool  CoM, 
                                 const QString& sp3FileName,
                                 const QString& rnxFileName,
                                 const QString& outFileName, int iRow) :
  bncUploadCaster(mountpoint, outHost, outPort, password, iRow, 0) {

  _crdTrafo   = crdTrafo;
  _CoM        = CoM;

  // Member that receives the ephemeris
  // ----------------------------------
  _ephUser = new bncEphUser();

  bncSettings settings;
  QString     intr  = settings.value("uploadIntr").toString();
  int         sampl = settings.value("uploadSampl").toInt();

  // Raw Output
  // ----------
  if (!outFileName.isEmpty()) {
    _outFile = new bncoutf(outFileName, intr, sampl);
  }
  else {
    _outFile = 0;
  }

  // RINEX writer
  // ------------
  if (!rnxFileName.isEmpty()) {
    _rnx = new bncClockRinex(rnxFileName, intr, sampl);
  }
  else {
    _rnx = 0;
  }

  // SP3 writer
  // ----------
  if (!sp3FileName.isEmpty()) {
    _sp3 = new bncSP3(sp3FileName, intr, sampl);
  }
  else {
    _sp3 = 0;
  }

  // Set Transformation Parameters
  // -----------------------------
  if      (_crdTrafo == "ETRF2000") {
    _dx  =    0.0541;
    _dy  =    0.0502;
    _dz  =   -0.0538;
    _dxr =   -0.0002;
    _dyr =    0.0001;
    _dzr =   -0.0018;
    _ox  =  0.000891;
    _oy  =  0.005390;
    _oz  = -0.008712;
    _oxr =  0.000081;
    _oyr =  0.000490;
    _ozr = -0.000792;
    _sc  =      0.40;
    _scr =      0.08;
    _t0  =    2000.0;
  }
  else if (_crdTrafo == "NAD83") {
    _dx  =    0.9963;
    _dy  =   -1.9024;
    _dz  =   -0.5210;
    _dxr =    0.0005;
    _dyr =   -0.0006;
    _dzr =   -0.0013;
    _ox  = -0.025915;
    _oy  = -0.009426;
    _oz  = -0.011599;
    _oxr = -0.000067;
    _oyr =  0.000757;
    _ozr =  0.000051;
    _sc  =      0.78;
    _scr =     -0.10;
    _t0  =    1997.0;
  }
  else if (_crdTrafo == "GDA94") {
    _dx  =   -0.07973;
    _dy  =   -0.00686;
    _dz  =    0.03803;
    _dxr =    0.00225;
    _dyr =   -0.00062;
    _dzr =   -0.00056;
    _ox  =  0.0000351;
    _oy  = -0.0021211;
    _oz  = -0.0021411;
    _oxr = -0.0014707;
    _oyr = -0.0011443;
    _ozr = -0.0011701;
    _sc  =      6.636;
    _scr =      0.294;
    _t0  =     1994.0;
  }
  else if (_crdTrafo == "SIRGAS2000") {
    _dx  =   -0.0051;
    _dy  =   -0.0065;
    _dz  =   -0.0099;
    _dxr =    0.0000;
    _dyr =    0.0000;
    _dzr =    0.0000;
    _ox  =  0.000150;
    _oy  =  0.000020;
    _oz  =  0.000021;
    _oxr =  0.000000;
    _oyr =  0.000000;
    _ozr =  0.000000;
    _sc  =     0.000;
    _scr =     0.000;
    _t0  =    0000.0;
  }
  else if (_crdTrafo == "SIRGAS95") {
    _dx  =    0.0077;
    _dy  =    0.0058;
    _dz  =   -0.0138;
    _dxr =    0.0000;
    _dyr =    0.0000;
    _dzr =    0.0000;
    _ox  =  0.000000;
    _oy  =  0.000000;
    _oz  = -0.000030;
    _oxr =  0.000000;
    _oyr =  0.000000;
    _ozr =  0.000000;
    _sc  =     1.570;
    _scr =     0.000;
    _t0  =    0000.0;
  }
  else if (_crdTrafo == "Custom") {
    bncSettings settings;
    _dx  = settings.value("trafo_dx").toDouble();
    _dy  = settings.value("trafo_dy").toDouble();
    _dz  = settings.value("trafo_dz").toDouble();
    _dxr = settings.value("trafo_dxr").toDouble();
    _dyr = settings.value("trafo_dyr").toDouble();
    _dzr = settings.value("trafo_dzr").toDouble();
    _ox  = settings.value("trafo_ox").toDouble();
    _oy  = settings.value("trafo_oy").toDouble();
    _oz  = settings.value("trafo_oz").toDouble();
    _oxr = settings.value("trafo_oxr").toDouble();
    _oyr = settings.value("trafo_oyr").toDouble();
    _ozr = settings.value("trafo_ozr").toDouble();
    _sc  = settings.value("trafo_sc").toDouble();
    _scr = settings.value("trafo_scr").toDouble();
    _t0  = settings.value("trafo_t0").toDouble();
  }
}

// Destructor
////////////////////////////////////////////////////////////////////////////
bncRtnetUploadCaster::~bncRtnetUploadCaster() {
  if (isRunning()) {
    wait();
  }
  delete _outFile;
  delete _rnx;
  delete _sp3;
  delete _ephUser;
}

// 
////////////////////////////////////////////////////////////////////////////
void bncRtnetUploadCaster::decodeRtnetStream(char* buffer, int bufLen) {
                                        
  QMutexLocker locker(&_mutex);

  // Append to internal buffer
  // -------------------------
  _rtnetStreamBuffer.append(QByteArray(buffer, bufLen));

  // Select buffer part that contains last epoch
  // -------------------------------------------
  QStringList lines;
  int iEpoBeg = _rtnetStreamBuffer.lastIndexOf('*');   // begin of last epoch
  if (iEpoBeg == -1) {
    _rtnetStreamBuffer.clear();
    return;
  }
  _rtnetStreamBuffer = _rtnetStreamBuffer.mid(iEpoBeg);

  int iEpoEnd = _rtnetStreamBuffer.lastIndexOf("EOE"); // end   of last epoch
  if (iEpoEnd == -1) {
    return;
  }
  else {
    lines = _rtnetStreamBuffer.left(iEpoEnd).split('\n', QString::SkipEmptyParts);
    _rtnetStreamBuffer = _rtnetStreamBuffer.mid(iEpoEnd+3);
  }

  if (lines.size() < 2) {
    return;
  }

  // Keep the last unfinished line in buffer
  // ---------------------------------------
  int iLastEOL = _rtnetStreamBuffer.lastIndexOf('\n');
  if (iLastEOL != -1) {
    _rtnetStreamBuffer = _rtnetStreamBuffer.mid(iLastEOL+1);
  }

  // Read first line (with epoch time)
  // ---------------------------------
  QTextStream in(lines[0].toAscii());
  QString hlp;
  int     year, month, day, hour, min;
  double  sec;
  in >> hlp >> year >> month >> day >> hour >> min >> sec;
  bncTime epoTime; epoTime.set( year, month, day, hour, min, sec);

  struct ClockOrbit co;
  memset(&co, 0, sizeof(co));
  co.GPSEpochTime      = static_cast<int>(epoTime.gpssec());
  co.GLONASSEpochTime  = static_cast<int>(fmod(epoTime.gpssec(), 86400.0))
                       + 3 * 3600 - gnumleap(year, month, day);
  co.ClockDataSupplied = 1;
  co.OrbitDataSupplied = 1;
  co.SatRefDatum       = DATUM_ITRF;
  
  struct Bias bias;
  memset(&bias, 0, sizeof(bias));
  bias.GPSEpochTime     = co.GPSEpochTime;
  bias.GLONASSEpochTime = co.GLONASSEpochTime;
  
  for (int ii = 1; ii < lines.size(); ii++) {
 
    QString      prn;
    ColumnVector xx(14); xx = 0.0;
  
    QTextStream in(lines[ii].toAscii());

    in >> prn;
    if (prn[0] == 'P') {
      prn.remove(0,1);
    }

    const bncEphUser::t_ephPair* ephPair = _ephUser->ephPair(prn);
    if (ephPair) {
      t_eph* eph = ephPair->last;

// receptDateTime() not (yet?) defined 
//      if (ephPair->prev && 
//           eph->receptDateTime().secsTo(QDateTime::currentDateTime()) < 60) {
//        eph = ephPair->prev;
//      }

      in >> xx(1) >> xx(2) >> xx(3) >> xx(4) >> xx(5) 
         >> xx(6) >> xx(7) >> xx(8) >> xx(9) >> xx(10)
         >> xx(11) >> xx(12) >> xx(13) >> xx(14);
      xx(1) *= 1e3;          // x-crd
      xx(2) *= 1e3;          // y-crd
      xx(3) *= 1e3;          // z-crd
      xx(4) *= 1e-6;         // clk
      xx(5) *= 1e-6;         // rel. corr.
                             // xx(6), xx(7), xx(8) ... PhaseCent - CoM
                             // xx(9)  ... P1-C1 DCB in meters
                             // xx(10) ... P1-P2 DCB in meters
                             // xx(11) ... dT
      xx(12) *= 1e3;         // x-crd at time + dT
      xx(13) *= 1e3;         // y-crd at time + dT
      xx(14) *= 1e3;         // z-crd at time + dT
  
      struct ClockOrbit::SatData* sd = 0;
      if      (prn[0] == 'G') {
        sd = co.Sat + co.NumberOfGPSSat;
        ++co.NumberOfGPSSat;
      }
      else if (prn[0] == 'R') {
        sd = co.Sat + CLOCKORBIT_NUMGPS + co.NumberOfGLONASSSat;
        ++co.NumberOfGLONASSSat;
      }
      if (sd) {
        QString outLine;
        processSatellite(eph, epoTime.gpsw(), epoTime.gpssec(), prn, 
                         xx, sd, outLine);
        if (_outFile) {
          _outFile->write(epoTime.gpsw(), epoTime.gpssec(), outLine);
        }
      }
  
      struct Bias::BiasSat* biasSat = 0;
      if      (prn[0] == 'G') {
        biasSat = bias.Sat + bias.NumberOfGPSSat;
        ++bias.NumberOfGPSSat;
      }
      else if (prn[0] == 'R') {
        biasSat = bias.Sat + CLOCKORBIT_NUMGPS + bias.NumberOfGLONASSSat;
        ++bias.NumberOfGLONASSSat;
      }
  
      // Coefficient of Ionosphere-Free LC
      // ---------------------------------
      const static double a_L1_GPS =  2.54572778;
      const static double a_L2_GPS = -1.54572778;
      const static double a_L1_Glo =  2.53125000;
      const static double a_L2_Glo = -1.53125000;
  
      if (biasSat) {
        biasSat->ID = prn.mid(1).toInt();
        biasSat->NumberOfCodeBiases = 3;
        if      (prn[0] == 'G') {
          biasSat->Biases[0].Type = CODETYPEGPS_L1_Z;
          biasSat->Biases[0].Bias = - a_L2_GPS * xx(10);
          biasSat->Biases[1].Type = CODETYPEGPS_L1_CA;
          biasSat->Biases[1].Bias = - a_L2_GPS * xx(10) + xx(9);
          biasSat->Biases[2].Type = CODETYPEGPS_L2_Z;
          biasSat->Biases[2].Bias = a_L1_GPS * xx(10);
        }
        else if (prn[0] == 'R') {
          biasSat->Biases[0].Type = CODETYPEGLONASS_L1_P;
          biasSat->Biases[0].Bias = - a_L2_Glo * xx(10);
          biasSat->Biases[1].Type = CODETYPEGLONASS_L1_CA;
          biasSat->Biases[1].Bias = - a_L2_Glo * xx(10) + xx(9);
          biasSat->Biases[2].Type = CODETYPEGLONASS_L2_P;
          biasSat->Biases[2].Bias = a_L1_Glo * xx(10);
        }
      }
    }
  }

  QByteArray hlpBufferCo;  

  const double ORBIT_RATE = 0.0;

  // Orbit and Clock Corrections together
  // ------------------------------------
  if (ORBIT_RATE == 0.0) {
    if (co.NumberOfGPSSat > 0 || co.NumberOfGLONASSSat > 0) {
      char obuffer[CLOCKORBIT_BUFFERSIZE];
      int len = MakeClockOrbit(&co, COTYPE_AUTO, 0, obuffer, sizeof(obuffer));
      if (len > 0) {
        hlpBufferCo = QByteArray(obuffer, len);
      }
    }
  }

  // Orbit and Clock Corrections separately
  // --------------------------------------
  else {
    if (co.NumberOfGPSSat > 0) {
      char obuffer[CLOCKORBIT_BUFFERSIZE];
      if (fmod(epoTime.gpssec(), ORBIT_RATE) == 0.0) {
        int len1 = MakeClockOrbit(&co, COTYPE_GPSORBIT, 0, obuffer, sizeof(obuffer));
        if (len1 > 0) {
          hlpBufferCo += QByteArray(obuffer, len1);
        }
      }
      int len2 = MakeClockOrbit(&co, COTYPE_GPSCLOCK, 0, obuffer, sizeof(obuffer));
      if (len2 > 0) {
        hlpBufferCo += QByteArray(obuffer, len2);
      }
    }
    if (co.NumberOfGLONASSSat > 0) {
      char obuffer[CLOCKORBIT_BUFFERSIZE];
      if (fmod(epoTime.gpssec(), ORBIT_RATE) == 0.0) {
        int len1 = MakeClockOrbit(&co, COTYPE_GLONASSORBIT, 0, obuffer, sizeof(obuffer));
        if (len1 > 0) {
          hlpBufferCo += QByteArray(obuffer, len1);
        }
      }
      int len2 = MakeClockOrbit(&co, COTYPE_GLONASSCLOCK, 0, obuffer, sizeof(obuffer));
      if (len2 > 0) {
        hlpBufferCo += QByteArray(obuffer, len2);
      }
    }
  }
  
  // Biases
  // ------
  QByteArray hlpBufferBias;  
  if (bias.NumberOfGPSSat > 0 || bias.NumberOfGLONASSSat > 0) {
    char obuffer[CLOCKORBIT_BUFFERSIZE];
    int len = MakeBias(&bias, BTYPE_AUTO, 0, obuffer, sizeof(obuffer));
    if (len > 0) {
      hlpBufferBias = QByteArray(obuffer, len);
    }
  }

  if (hlpBufferCo.size() > 0) {
    _outBuffer = hlpBufferCo + hlpBufferBias;
  }
}

// 
////////////////////////////////////////////////////////////////////////////
void bncRtnetUploadCaster::processSatellite(t_eph* eph, int GPSweek, 
                                       double GPSweeks, const QString& prn, 
                                       const ColumnVector& xx, 
                                       struct ClockOrbit::SatData* sd,
                                       QString& outLine) {

  const double secPerWeek = 7.0 * 86400.0;

  ColumnVector rsw(3);
  ColumnVector rsw2(3);
  double dClk;

  for (int ii = 1; ii <= 2; ++ii) {

    int    GPSweek12  = GPSweek;
    double GPSweeks12 = GPSweeks;
    if (ii == 2) {
      GPSweeks12 += xx(11);
      if (GPSweeks12 > secPerWeek) {
        GPSweek12  += 1;
        GPSweeks12 -= secPerWeek;
      }
    }

    ColumnVector xB(4);
    ColumnVector vv(3);

    eph->position(GPSweek12, GPSweeks12, xB.data(), vv.data());
    
    ColumnVector xyz;
    if (ii == 1) {
      xyz = xx.Rows(1,3);
    }
    else {
      xyz = xx.Rows(12,14);
    }
    
    // Correction Center of Mass -> Antenna Phase Center
    // -------------------------------------------------
    if (! _CoM) {
      xyz(1) += xx(6);
      xyz(2) += xx(7);
      xyz(3) += xx(8);
    }
    
    if (_crdTrafo != "IGS05") {
      crdTrafo(GPSweek12, xyz);
    }
    
    ColumnVector dx = xB.Rows(1,3) - xyz ;
    
    if (ii == 1) {
      XYZ_to_RSW(xB.Rows(1,3), vv, dx, rsw);
      dClk = (xx(4) + xx(5) - xB(4)) * 299792458.0;
    }
    else {
      XYZ_to_RSW(xB.Rows(1,3), vv, dx, rsw2);
    }
  }

  if (sd) {
    sd->ID                    = prn.mid(1).toInt();
    sd->IOD                   = eph->IOD();
    sd->Clock.DeltaA0         = dClk;
    sd->Orbit.DeltaRadial     = rsw(1);
    sd->Orbit.DeltaAlongTrack = rsw(2);
    sd->Orbit.DeltaCrossTrack = rsw(3);
    sd->Orbit.DotDeltaRadial     = (rsw2(1) - rsw(1)) / xx(11);
    sd->Orbit.DotDeltaAlongTrack = (rsw2(2) - rsw(2)) / xx(11);
    sd->Orbit.DotDeltaCrossTrack = (rsw2(3) - rsw(3)) / xx(11);
  }

  outLine.sprintf("%d %.1f %s  %3d  %10.3f  %8.3f %8.3f %8.3f\n", 
                  GPSweek, GPSweeks, eph->prn().toAscii().data(),
                  eph->IOD(), dClk, rsw(1), rsw(2), rsw(3));

  if (_rnx) {
    _rnx->write(GPSweek, GPSweeks, prn, xx);
  }
  if (_sp3) {
    _sp3->write(GPSweek, GPSweeks, prn, xx);
  }
}

// Transform Coordinates
////////////////////////////////////////////////////////////////////////////
void bncRtnetUploadCaster::crdTrafo(int GPSWeek, ColumnVector& xyz) {

  // Current epoch minus 2000.0 in years
  // ------------------------------------
  double dt = (GPSWeek - (1042.0+6.0/7.0)) / 365.2422 * 7.0 + 2000.0 - _t0;

  ColumnVector dx(3);

  dx(1) = _dx + dt * _dxr;
  dx(2) = _dy + dt * _dyr;
  dx(3) = _dz + dt * _dzr;

  static const double arcSec = 180.0 * 3600.0 / M_PI;

  double ox = (_ox + dt * _oxr) / arcSec;
  double oy = (_oy + dt * _oyr) / arcSec;
  double oz = (_oz + dt * _ozr) / arcSec;

  double sc = 1.0 + _sc * 1e-9 + dt * _scr * 1e-9;

  Matrix rMat(3,3);
  rMat(1,1) = 1.0;
  rMat(1,2) = -oz;
  rMat(1,3) =  oy;
  rMat(2,1) =  oz;
  rMat(2,2) = 1.0;
  rMat(2,3) = -ox;
  rMat(3,1) = -oy;
  rMat(3,2) =  ox;
  rMat(3,3) = 1.0;

  xyz = sc * rMat * xyz + dx;
}

