//
// C++ Interface: Scantable
//
// Description:
//
//
// Author: Malte Marquarding <asap@atnf.csiro.au>, (C) 2005
//
// Copyright: See COPYING file that comes with this distribution
//
//
#ifndef ASAPSCANTABLE_H
#define ASAPSCANTABLE_H

// STL
#include <string>
#include <vector>
// AIPS++
#include <casa/aips.h>
#include <casa/Arrays/MaskedArray.h>
#include <casa/BasicSL/String.h>
#include <casa/Utilities/CountedPtr.h>

#include <tables/Tables/Table.h>
#include <tables/Tables/ArrayColumn.h>
#include <tables/Tables/ScalarColumn.h>

#include <measures/TableMeasures/ScalarMeasColumn.h>

#include <coordinates/Coordinates/SpectralCoordinate.h>

#include "Logger.h"
#include "STHeader.h"
#include "STFrequencies.h"
#include "STWeather.h"
#include "STFocus.h"
#include "STTcal.h"
#include "STMolecules.h"
#include "STSelector.h"
#include "STHistory.h"
#include "STPol.h"
#include "STFit.h"
#include "STFitEntry.h"

namespace asap {

/**
  * This class contains and wraps a casa::Table, which is used to store
  * all the information. This can be either a MemoryTable or a
  * disk based Table.
  * It provides access functions to the underlying table
  * It contains n subtables:
  * @li weather
  * @li frequencies
  * @li molecules
  * @li tcal
  * @li focus
  * @li fits
  *
  * @brief The main ASAP data container
  * @author Malte Marquarding
  * @date
  * @version
*/
class Scantable : private Logger
{

friend class STMath;

public:
  /**
   * Default constructor
   */
  explicit Scantable(casa::Table::TableType ttype = casa::Table::Memory);

  /**
   * Create a Scantable object form an existing table on disk
   * @param[in] name the name of the existing Scantable
   */
  explicit Scantable(const std::string& name, casa::Table::TableType ttype = casa::Table::Memory);

  /// @fixme this is only sensible for MemoryTables....
  Scantable(const Scantable& other, bool clear=true);

  /**
   * Destructor
   */
  virtual ~Scantable();

  /**
   * get a const reference to the underlying casa::Table
   * @return const \ref casa::Table reference
   */
  const casa::Table& table() const;

  /**
   * get a reference to the underlying casa::Table with the Selection
   * object applied if set
   * @return casa::Table reference
   */
  casa::Table& table();


  /**
   * Get a handle to the selection object
   * @return constant STSelector reference
   */
  const STSelector& getSelection() const { return selector_; }

  /**
   * Set the data to be a subset as defined by the STSelector
   * @param selection a STSelector object
   */
  void setSelection(const STSelector& selection);

  /**
   * unset the selection of the data
   */
  void unsetSelection();
  /**
   * set the header
   * @param[in] sth an STHeader object
   */
  void setHeader( const STHeader& sth );

  /**
   * get the header information
   * @return an STHeader object
   */
  STHeader getHeader( ) const;

  /**
   * Checks if the "other" Scantable is conformant with this,
   * i.e. if  header values are the same.
   * @param[in] other another Scantable
   * @return true or false
   */
  bool conformant( const Scantable& other);

  /**
   *
   * @param stype The type of the source, 0 = on, 1 = off
   */
  void setSourceType(int stype);


  /**
   * The number of scans in the table
   * @return number of scans in the table
   */
  int nscan() const;

  casa::MEpoch::Types getTimeReference() const;


  casa::MEpoch getEpoch(int whichrow) const;

  /**
   * Get global antenna position
   * @return casa::MPosition
   */
  casa::MPosition getAntennaPosition() const;

  /**
   * the @ref casa::MDirection for a specific row
   * @param[in] whichrow the row number
   * return casa::MDirection
   */
  casa::MDirection getDirection( int whichrow ) const;

  /**
   * get the direction type as a string, e.g. "J2000"
   * @param[in] whichrow the row number
   * return the direction string
   */
  std::string getDirectionString( int whichrow ) const;

  /**
   * set the direction type as a string, e.g. "J2000"
   * @param[in] refstr the direction type
   */
  void setDirectionRefString(const std::string& refstr="");

  /**
   * get the direction reference string
   * @return a string describing the direction reference
   */
  std::string getDirectionRefString() const;

  /**
   *  Return the Flux unit of the data, e.g. "Jy" or "K"
   * @return string
   */
  std::string getFluxUnit() const;

  /**
   * Set the Flux unit of the data
   * @param unit a string representing the unit, e.g "Jy" or "K"
   */
  void setFluxUnit( const std::string& unit );

  /**
   * Set the Stokes type of the data
   * @param feedtype a string representing the type, e.g "circular" or "linear"
   */
  void setFeedType( const std::string& feedtype );

  /**
   *
   * @param instrument a string representing an insturment. see xxx
   */
  void setInstrument( const std::string& instrument );

  /**
   * (Re)calculate the azimuth and elevationnfor all rows
   */
  void calculateAZEL();

  /**
   * "hard" flag the data, this flags everything selected in setSelection()
   * param[in] msk a boolean mask of length nchan describing the points to
   * to be flagged
   */
  //void flag( const std::vector<bool>& msk = std::vector<bool>());
  void flag( const std::vector<bool>& msk = std::vector<bool>(), bool unflag=false);

  /**
   * Return a list of row numbers with respect to the original table.
   * @return a list of unsigned ints
   */
  std::vector<unsigned int> rownumbers() const;


  /**
   * Get the number of beams in the data or a specific scan
   * @param scanno the scan number to get the number of beams for.
   * If scanno<0 the number is retrieved from the header.
   * @return an integer number
   */
  int nbeam(int scanno=-1) const;
  /**
   * Get the number of IFs in the data or a specific scan
   * @param scanno the scan number to get the number of IFs for.
   * If scanno<0 the number is retrieved from the header.
   * @return an integer number
   */
  int nif(int scanno=-1) const;
  /**
   * Get the number of polarizations in the data or a specific scan
   * @param scanno the scan number to get the number of polarizations for.
   * If scanno<0 the number is retrieved from the header.
   * @return an integer number
   */
  int npol(int scanno=-1) const;

  std::string getPolType() const;


  /**
   * Get the number of integartion cycles
   * @param scanno the scan number to get the number of rows for.
   * If scanno<0 the number is retrieved from the header.
   * @return the number of rows (for the specified scanno)
   */
  int nrow(int scanno=-1) const;

  int getBeam(int whichrow) const;
  std::vector<uint> getBeamNos() const { return getNumbers(beamCol_); }

  int getIF(int whichrow) const;
  std::vector<uint> getIFNos() const { return getNumbers(ifCol_); }

  int getPol(int whichrow) const;
  std::vector<uint> getPolNos() const { return getNumbers(polCol_); }

  std::vector<uint> getScanNos() const { return getNumbers(scanCol_); }
  int getScan(int whichrow) const { return scanCol_(whichrow); }

  /**
   * Get the number of channels in the data or a specific IF. This currently
   * varies only with IF number
   * @param ifno the IF number to get the number of channels for.
   * If ifno<0 the number is retrieved from the header.
   * @return an integer number
   */
  int nchan(int ifno=-1) const;
  int getChannels(int whichrow) const;

  int ncycle(int scanno=-1) const;
  int getCycle(int whichrow) const { return cycleCol_(whichrow); }

  double getInterval(int whichrow) const
    { return integrCol_(whichrow); }

  float getTsys(int whichrow) const
    { return casa::Vector<casa::Float>(tsysCol_(whichrow))(0); }
  float getElevation(int whichrow) const
    { return elCol_(whichrow); }
  float getAzimuth(int whichrow) const
    { return azCol_(whichrow); }
  float getParAngle(int whichrow) const
  { return focus().getParAngle(mfocusidCol_(whichrow)); }

  std::string getSourceName(int whichrow) const
    { return srcnCol_(whichrow); }

  std::vector<bool> getMask(int whichrow) const;
  std::vector<float> getSpectrum(int whichrow,
                                 const std::string& poltype = "" ) const;

  void setSpectrum(const std::vector<float>& spec, int whichrow);

  std::string getPolarizationLabel(int index, const std::string& ptype) const
    { return STPol::getPolLabel(index, ptype ); }

  /**
   * Write the Scantable to disk
   * @param filename the output file name
   */
  void makePersistent(const std::string& filename);

  std::vector<std::string> getHistory() const
    { return historyTable_.getHistory(); };

  void addHistory(const std::string& hist) { historyTable_.addEntry(hist); }

  void appendToHistoryTable(const STHistory& otherhist)
    { historyTable_.append(otherhist); }

  std::string summary(bool verbose=false);
  std::string getTime(int whichrow=-1, bool showdate=true) const;
  double getIntTime(int whichrow) const { return integrCol_(whichrow); }

  // returns unit, conversion frame, doppler, base-frame

  /**
   * Get the frequency set up
   * This is forwarded to the STFrequencies subtable
   * @return unit, frame, doppler
   */
  std::vector<std::string> getCoordInfo() const
    { return freqTable_.getInfo(); };

  void setCoordInfo(std::vector<string> theinfo)
    { return freqTable_.setInfo(theinfo); };


  std::vector<double> getAbcissa(int whichrow) const;

  std::vector<float> getWeather(int whichrow) const;

  std::string getAbcissaLabel(int whichrow) const;
  std::vector<double> getRestFrequencies() const
    { return moleculeTable_.getRestFrequencies(); }

  void setRestFrequencies(double rf, const std::string& name = "",
                          const std::string& = "Hz");
  void setRestFrequencies(const std::string& name);

  void shift(int npix);

  casa::SpectralCoordinate getSpectralCoordinate(int whichrow) const;

  void convertDirection(const std::string& newframe);

  STFrequencies& frequencies() { return freqTable_; }
  const STFrequencies& frequencies() const { return freqTable_; }
  STWeather& weather() { return weatherTable_; }
  const STWeather& weather() const { return weatherTable_; }
  STFocus& focus() { return focusTable_; }
  const STFocus& focus() const { return focusTable_; }
  STTcal& tcal() { return tcalTable_; }
  const STTcal& tcal() const { return tcalTable_; }
  STMolecules& molecules() { return moleculeTable_; }
  const STMolecules& molecules() const { return moleculeTable_; }
  STHistory& history() { return historyTable_; }
  const STHistory& history() const { return historyTable_; }
  STFit& fit() { return fitTable_; }
  const STFit& fit() const { return fitTable_; }

  std::vector<std::string> columnNames() const;

  void addFit(const STFitEntry& fit, int row);
  STFitEntry getFit(int row) const
    { STFitEntry fe; fitTable_.getEntry(fe, mfitidCol_(row)); return fe; }

  //Added by TT
  /**
   * Get the antenna name
   * @return antenna name string
   */
  std::string getAntennaName() const;

  /**
   * For GBT MS data only. check a scan list
   * against the information found in GBT_GO table for
   * scan number orders to get correct pairs.
   * @param[in] scan list
   * @return status
   */
  int checkScanInfo(const std::vector<int>& scanlist) const;

  /**
   * Get the direction as a vector, for a specific row
   * @param[in] whichrow the row numbyyer
   * @return the direction in a vector
   */
  std::vector<double> getDirectionVector(int whichrow) const;

  /**
   * Set a flag indicating whether the data was parallactified
   * @param[in] flag true or false
   */
  void parallactify(bool flag)
    { focus().setParallactify(flag); }

private:

  casa::Matrix<casa::Float> getPolMatrix( casa::uInt whichrow ) const;

  /**
   * Turns a time vale into a formatted string
   * @param x
   * @return
   */
  std::string formatSec(casa::Double x) const;

  std::string formatTime(const casa::MEpoch& me, bool showdate)const;

  /**
   *  Turns a casa::MDirection into a nicely formatted string
   * @param md an casa::MDirection
   * @return
   */
  std::string formatDirection(const casa::MDirection& md) const;


  /**
   * Create a unique file name for the paged (temporary) table
   * @return just the name
   */
  static casa::String generateName();

  /**
   * attach to cached columns
   */
  void attach();

  /**
   * Set up the main casa::Table
   */
  void setupMainTable();

  void attachSubtables();
  void copySubtables(const Scantable& other);

  /**
   * Convert an "old" asap1 style row index into a new index
   * @param[in] therow
   * @return and index into @table_
   */
  int rowToScanIndex(int therow);

  std::vector<uint> getNumbers(const casa::ScalarColumn<casa::uInt>& col) const;

  static const casa::uInt version_ = 3;

  STSelector selector_;

  casa::Table::TableType type_;

  // the actual data
  casa::Table table_;
  casa::Table originalTable_;

  STTcal tcalTable_;
  STFrequencies freqTable_;
  STWeather weatherTable_;
  STFocus focusTable_;
  STMolecules moleculeTable_;
  STHistory historyTable_;
  STFit fitTable_;

  // Cached Columns to avoid reconstructing them for each row get/put
  casa::ScalarColumn<casa::Double> integrCol_;
  casa::MDirection::ScalarColumn dirCol_;
  casa::MEpoch::ScalarColumn timeCol_;
  casa::ScalarColumn<casa::Float> azCol_;
  casa::ScalarColumn<casa::Float> elCol_;
  casa::ScalarColumn<casa::String> srcnCol_, fldnCol_;
  casa::ScalarColumn<casa::uInt> scanCol_, beamCol_, ifCol_, polCol_, cycleCol_;
  casa::ScalarColumn<casa::Int> rbeamCol_, srctCol_;
  casa::ArrayColumn<casa::Float> specCol_, tsysCol_;
  casa::ArrayColumn<casa::uChar> flagsCol_;

  // id in frequencies table
  casa::ScalarColumn<casa::uInt> mfreqidCol_;
  // id in tcal table
  casa::ScalarColumn<casa::uInt> mtcalidCol_;

  casa::ArrayColumn<casa::String> histitemCol_;
  casa::ScalarColumn<casa::Int> mfitidCol_;
  casa::ScalarColumn<casa::uInt> mweatheridCol_;

  casa::ScalarColumn<casa::uInt> mfocusidCol_;

  casa::ScalarColumn<casa::uInt> mmolidCol_;

  static std::map<std::string, STPol::STPolFactory *> factories_;
  void initFactories();

};


} // namespace

#endif