/* -----------------------------------------------------------------------------
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the Software are granted under this license.

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Copyright (c) 2018-2023, Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. & The VVdeC Authors.
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     this list of conditions and the following disclaimer.

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THIS LICENSE. THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
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------------------------------------------------------------------------------------------- */

#include "CommonDef.h"
#include "StatCounter.h"

#include <string>
#include <ostream>
#include <sstream>
#include <vector>
#include <cstdarg>

namespace vvdec
{

#define OUTPUT(...) { snprintf( cStr, sizeof(cStr), __VA_ARGS__ ); m_str << cStr; }
#define OUTSTR( _w, ... ) { m_str << std::setw( (int)_w ) << __VA_ARGS__; }
#define OUTSTRC( _w, _c ) { m_str << std::setfill( _c ) << std::setw( (int)_w  ) << _c << std::setfill( ' ' ); }
#define OUTSTRF( _w, _p, ... ) { m_str << std::fixed << std::setw( (int)_w ) << std::setprecision(_p) << __VA_ARGS__; }
#define OUTPUT_COND_SIZE_IDX(_stype,_idx,...) { sprintf( cStr, __VA_ARGS__ ); m_str << cStr; }
#define MIN_SIZE_IDX 2
#define IDX_TO_SIZE(_i) (1<<_i)

////////////////////////////////////////////////////////////////////////////////////
// report2D

template<typename T>
std::ostream& StatCounters::report2D( std::ostream& os, const StatCounter2DSet<T>& cntSet, bool axisInBlockSizes, bool absoluteNumbers, bool weightedByArea, bool secondColumnInPercentage, bool ratiosWithinSingleElement, int refCntId )
{
  char cStr[512];
  std::stringstream m_str;

  CHECK_RECOVERABLE( !axisInBlockSizes && weightedByArea, "Mode is not supported" );

  //OUTPUT( "DISTRIBUTION (in %s \r\n", isAbsolute ? "number of occurances)": ( !isWeightedByArea ? "in % of blocks)" : "in % of area)" ) );
  const size_t xDim = cntSet.getDimHor();
  const size_t yDim = cntSet.getDimVer();
  const size_t totalNumCnt = cntSet.getNumCntTypes();
  const int firstSizeIdx = axisInBlockSizes ? MIN_SIZE_IDX: 0;

  double totalArea = 0.0;
  if( weightedByArea && !ratiosWithinSingleElement )
  {
    for( int j = firstSizeIdx; j < yDim; j++ )
    {
      for( int cntIdx = firstSizeIdx; cntIdx < totalNumCnt; cntIdx++ )
      {
        for( int i = 0; i < xDim; i++ )
        {
          size_t blockArea = IDX_TO_SIZE( j )  * IDX_TO_SIZE( i );
          totalArea += blockArea * cntSet[cntIdx][j][i];
        }
      }
    }
  }

  // Get max string length across all counter names
  int maxCntNameLen = 0;
  for( int cntIdx = 0; cntIdx < totalNumCnt; cntIdx++ )
  {
    int len = (int)cntSet[cntIdx].getName().length();
    if( len > maxCntNameLen )
      maxCntNameLen = len;
  }
  int leftW = 12 + maxCntNameLen + 2;

  // Determine the max symbols (numbers) in the string of the counter output
  const size_t maxSymbolsInMantissa = 6;
  size_t numSymbolsInMantissa = 0;
  for( int j = firstSizeIdx; j < yDim; j++ )
  {
    for( int i = firstSizeIdx; i < xDim; i++ )
    {
      for( int cntIdx = 0; cntIdx < totalNumCnt; cntIdx++ )
      {
        std::stringstream ss;
        ss << std::fixed << std::setprecision( 1 ) << ( cntSet[cntIdx][j][i] );
        const size_t syms = ss.str().size();
        if( syms > numSymbolsInMantissa )
          numSymbolsInMantissa = syms;
      }
    }
  }

  // Derive scaling factor depending of the range of the numbers
  int64_t scalingFactor = 1;
  while( numSymbolsInMantissa > maxSymbolsInMantissa + 3 )
  {
    scalingFactor *= 1000;
    numSymbolsInMantissa -= 3;
  }
  numSymbolsInMantissa = std::max<size_t>( maxSymbolsInMantissa, numSymbolsInMantissa );
  const size_t numSymbolsInExp = absoluteNumbers && secondColumnInPercentage ? 6: 0; // second value in percentage
  const size_t numTotalValSyms = numSymbolsInMantissa + numSymbolsInExp + 1;
  if( absoluteNumbers && scalingFactor > 1 )
  {
    OUTPUT( "Scaling factor = %lld\r\n", (long long)scalingFactor );
  }

  // Legend over X-axis

  OUTSTR( leftW, " " );
  for( int i = firstSizeIdx; i < xDim; i++ )
  {
    OUTSTR( numTotalValSyms, (axisInBlockSizes ? IDX_TO_SIZE( i ): i) );
  }
  OUTSTR( 0, "\r\n" );
  OUTSTR( leftW, " " );
  OUTSTRC( (numTotalValSyms * (xDim - firstSizeIdx)), '-' );
  OUTSTR( 0, "\r\n" );

  // Data over Y and X axis

  // Derive counters that contains the data
  std::vector<T> cntAccum;
  for( int cntIdx = 0; cntIdx < totalNumCnt; cntIdx++ )
  {
    cntAccum.push_back( cntSet[cntIdx].total() );
  }

  // --- Loop over heights ---
  for( int j = firstSizeIdx; j < yDim; j++ )
  {
    OUTSTR( 9, (axisInBlockSizes ? IDX_TO_SIZE( j ): j)  );

    // --- Loop over counters ---
    int outputCount = 0;
    for( int cntIdx = 0; cntIdx < totalNumCnt; cntIdx++ )
    {
      // Skip counter if it doesn't contain data
      if( cntAccum[cntIdx] == 0 )
        continue;

      // Counter Name

      OUTSTR( outputCount == 0 ? 0 : 12, " | " );
      OUTSTR( maxCntNameLen, std::left << cntSet[cntIdx].getName().c_str() << std::internal );
      OUTSTR( 2, " " );
      outputCount++;

      // --- Loop over widths ---
      for( int i = firstSizeIdx; i < xDim; i++ )
      {
        double val = (double)cntSet[cntIdx][j][i];
          
        if( val > 0 )
        {
          OUTSTR( 0, " " );
          if( absoluteNumbers )
          {
            OUTSTR( numSymbolsInMantissa, (int)(val / (double)scalingFactor) );
            if( secondColumnInPercentage )
            {
              double totalAmount = ratiosWithinSingleElement ? ( refCntId >= 0 ? cntSet[refCntId][j][i] : ( double ) cntSet.total( i, j ) ) : ( refCntId >= 0 ? ( double ) cntSet.total( refCntId ) : ( double ) cntSet.total() );
              val = val * (double)100.0 / totalAmount;
              OUTSTRF( numSymbolsInExp, 1, val );
            }
          }
          else
          {
            double totalAmount = ratiosWithinSingleElement ? ( refCntId >= 0 ? cntSet[refCntId][j][i] : ( double ) cntSet.total( i, j ) ) : ( refCntId >= 0 ? ( double ) cntSet.total( refCntId ) : ( double ) cntSet.total() );
            if( !weightedByArea )
            {
              val = ((cntSet[cntIdx][j][i])) * (double)100.0 / totalAmount;
              OUTSTRF( numSymbolsInMantissa, 1, val );
            }
            else
            {
              int blockArea = IDX_TO_SIZE( j )  * IDX_TO_SIZE( i );
              val = (blockArea * (cntSet[cntIdx][j][i])) * (double)100.0 / ( ratiosWithinSingleElement ? totalAmount * blockArea : totalArea );
              OUTSTRF( numSymbolsInMantissa, 1, val );
            }
          }
        }
        else
        {
          OUTSTR( numTotalValSyms, "." );
        }
      }
      OUTSTR( 0, "\r\n" );
    }
    // Empty line to separate heights
    OUTSTR( 0, "\r\n" );
  }

  os << m_str.str();
  return os;
}

template std::ostream& StatCounters::report2D<double>( std::ostream& os, const StatCounter2DSet<double>& counters, bool axisInBlockSizes, bool absoluteNumbers, bool weightedByArea, bool secondColumnInPercentage, bool ratiosWithinSingleElement, int refCntId );
template std::ostream& StatCounters::report2D<int64_t>( std::ostream& os, const StatCounter2DSet<int64_t>& counters, bool axisInBlockSizes, bool absoluteNumbers, bool weightedByArea, bool secondColumnInPercentage, bool ratiosWithinSingleElement, int refCntId );

}