/*
 * (c) Copyright Ascensio System SIA 2010-2023
 *
 * This program is a free software product. You can redistribute it and/or
 * modify it under the terms of the GNU Affero General Public License (AGPL)
 * version 3 as published by the Free Software Foundation. In accordance with
 * Section 7(a) of the GNU AGPL its Section 15 shall be amended to the effect
 * that Ascensio System SIA expressly excludes the warranty of non-infringement
 * of any third-party rights.
 *
 * This program is distributed WITHOUT ANY WARRANTY; without even the implied
 * warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR  PURPOSE. For
 * details, see the GNU AGPL at: http://www.gnu.org/licenses/agpl-3.0.html
 *
 * You can contact Ascensio System SIA at 20A-6 Ernesta Birznieka-Upish
 * street, Riga, Latvia, EU, LV-1050.
 *
 * The  interactive user interfaces in modified source and object code versions
 * of the Program must display Appropriate Legal Notices, as required under
 * Section 5 of the GNU AGPL version 3.
 *
 * Pursuant to Section 7(b) of the License you must retain the original Product
 * logo when distributing the program. Pursuant to Section 7(e) we decline to
 * grant you any rights under trademark law for use of our trademarks.
 *
 * All the Product's GUI elements, including illustrations and icon sets, as
 * well as technical writing content are licensed under the terms of the
 * Creative Commons Attribution-ShareAlike 4.0 International. See the License
 * terms at http://creativecommons.org/licenses/by-sa/4.0/legalcode
 *
 */

#include "FormattedDiskPagePAPX.h"

namespace DocFileFormat
{
	FormattedDiskPagePAPX::~FormattedDiskPagePAPX()
	{
	  RELEASEARRAYOBJECTS( rgfc );
	  RELEASEARRAYOBJECTS( rgbx );

	  if ( grppapx != NULL )
	  {
	    for ( unsigned int i = 0; i < grppapxSize; i++ )
		{
		  RELEASEOBJECT( grppapx[i] );
		}

		RELEASEARRAYOBJECTS( grppapx );
	  }
	}

	/*========================================================================================================*/
	
	FormattedDiskPagePAPX::FormattedDiskPagePAPX( POLE::Stream* wordStream, int offset, POLE::Stream* dataStream, int nWordVersion, bool fComplex): 
																		FormattedDiskPage(), rgbx(NULL), grppapxSize(0), grppapx(NULL)
	{
		Type = Paragraph;
		WordStream = wordStream;

		//read the 512 bytes (FKP)
		unsigned char* bytes = NULL;
		bytes = new unsigned char[512];

		WordStream->seek( offset);
		WordStream->read( bytes, 512);

		//get the count
		crun = bytes[511];

		//create and fill the array with the adresses
		rgfcSize	= crun + 1;
		rgfc		= new int[rgfcSize];

		int j = 0;
      
		for ( unsigned int i = 0; i < rgfcSize; i++ )
		{
			rgfc[i] = FormatUtils::BytesToInt32( bytes, j, 512 );
			j += 4;
		}
		rgbx = new BX[crun];
		grppapxSize = crun;
		grppapx = new ParagraphPropertyExceptions*[grppapxSize];

		for ( unsigned int i = 0; i < grppapxSize; i++ )
		{
			grppapx[i] = NULL;
		}

		j = 4 * ( crun + 1 );

		unsigned char phe[12];
      
		for ( unsigned char i = 0; i < crun; i++ )
		{
			BX bx;
			bx.wordOffset = bytes[j];
			j++;
		
			if (fComplex || nWordVersion == 0)
			{
				memcpy( phe, ( bytes + j), 12 );

				//fill the rgbx array
				bx.phe = ParagraphHeight( phe, 12, false );

				j += 12;
			}
			else if (nWordVersion == 2)
			{
				memcpy( phe, ( bytes + bx.wordOffset * 2  + j + 1), 6);

				//fill the rgbx array
				bx.phe = ParagraphHeight( phe, 6, false );
			}
			else
			{
				memcpy( phe, ( bytes + j), 6);

				//fill the rgbx array
				bx.phe = ParagraphHeight( phe, 6, false );

				j += 6;
			}
			rgbx[i] = bx;

			if ( bx.wordOffset != 0 )
			{
				unsigned char padbyte = 0;
				unsigned char cw = bytes[bx.wordOffset * 2];
				//if that unsigned char is zero, it's a pad unsigned char, and the word count is the following unsigned char
				if ( cw == 0 )
				{
					padbyte = 1;
					cw = bytes[bx.wordOffset * 2 + 1];
				}
				if ( cw != 0 )
				{
					int sz = cw * 2;
					//read the bytes for papx
					unsigned char* papx = new unsigned char[sz];
					memcpy( papx, ( bytes + (bx.wordOffset * 2) + padbyte + 1 ), sz );

					//parse PAPX and fill grppapx
					grppapx[i] = new ParagraphPropertyExceptions( papx, sz, dataStream, nWordVersion );

					RELEASEARRAYOBJECTS( papx );
				}

			}
			else
			{
				//create a PAPX which doesn't modify anything
				grppapx[i] = new ParagraphPropertyExceptions();
			}
		}

		RELEASEARRAYOBJECTS( bytes );
	}

	/*========================================================================================================*/

	/// Parses the 0Table (or 1Table) for FKP _entries containing PAPX
	std::vector<FormattedDiskPagePAPX*>* FormattedDiskPagePAPX::GetAllPAPXFKPs( FileInformationBlock* fib, POLE::Stream* wordStream, POLE::Stream* tableStream, POLE::Stream* dataStream)
    {
      std::vector<FormattedDiskPagePAPX*>* PAPXlist = new std::vector<FormattedDiskPagePAPX*>();

      //get bintable for PAPX
	  unsigned char* binTablePapx = new unsigned char[fib->m_FibWord97.lcbPlcfBtePapx];

	  if (tableStream)
	  {
		  tableStream->seek( fib->m_FibWord97.fcPlcfBtePapx);
		  tableStream->read( binTablePapx, fib->m_FibWord97.lcbPlcfBtePapx);
	  }
	
	  //there are n offsets and n-1 fkp's in the bin table

	  if (fib->m_nWordVersion > 0 && fib->m_FibBase.fComplex == false)
	  {
			int	n		= ( ( (int)fib->m_FibWord97.lcbPlcfBtePapx - 8 ) / 6 ) + 1;

			unsigned int first = FormatUtils::BytesToInt32(binTablePapx, 0, fib->m_FibWord97.lcbPlcfBtePapx );
			unsigned int last = FormatUtils::BytesToInt32(binTablePapx, 4, fib->m_FibWord97.lcbPlcfBtePapx );
			
			int start_papx = 8;
			if (fib->m_FibWord97.lcbPlcfBtePapx - 8 >  (n - 1) * 4)
			{
				start_papx+= ((n-1) * 4); //дублирование crun 
			}

			int offset = 0;
			for ( unsigned int i = start_papx; i < fib->m_FibWord97.lcbPlcfBtePapx; i += 2 )
			{
				//indexed FKP is the xth 512byte page
				int fkpnr = FormatUtils::BytesToInt16( binTablePapx, i, fib->m_FibWord97.lcbPlcfBtePapx );

				//so starts at:
				int offset = fkpnr * 512;

				//parse the FKP and add it to the list
				PAPXlist->push_back( new FormattedDiskPagePAPX( wordStream, offset, dataStream, fib->m_nWordVersion, fib->m_FibBase.fComplex) );
			}

			//if (PAPXlist->back()->rgfc[PAPXlist->back()->rgfcSize-1] < last)
			//{
			//	PAPXlist->back()->rgfc[PAPXlist->back()->rgfcSize-1] = last;
			//	//tableStream->read( binTablePapx, fib->m_FibWord97.lcbPlcfBtePapx);
			//	//offset+=512;
			//	//PAPXlist->push_back( new FormattedDiskPagePAPX( wordStream, offset, dataStream ) );
			//}
	  }
	  else
	  {
		  int n = ( ( (int)fib->m_FibWord97.lcbPlcfBtePapx - 4 ) / 8 ) + 1;
		  //Get the indexed PAPX FKPs
		  for ( unsigned int i = ( n * 4 ); i < fib->m_FibWord97.lcbPlcfBtePapx; i += 4 )
		  {
			//indexed FKP is the xth 512byte page
			int fkpnr = FormatUtils::BytesToInt32( binTablePapx, i, fib->m_FibWord97.lcbPlcfBtePapx );

			//so starts at:
			int offset = fkpnr * 512;

			//parse the FKP and add it to the list
			PAPXlist->push_back( new FormattedDiskPagePAPX( wordStream, offset, dataStream, fib->m_nWordVersion, fib->m_FibBase.fComplex) );
		  }

	  }
	
	  RELEASEARRAYOBJECTS( binTablePapx );

      return PAPXlist;
    }

	/*========================================================================================================*/

	/// Returns a list of all PAPX FCs between they given boundaries.
	std::vector<int>* FormattedDiskPagePAPX::GetFileCharacterPositions
	(
      int fcMin,
      int fcMax,
      FileInformationBlock* fib, 
      POLE::Stream* wordStream, 
      POLE::Stream* tableStream,
      POLE::Stream* dataStream
	)
    {
      std::vector<int>* cpList = new std::vector<int>();
	  std::vector<FormattedDiskPagePAPX*> *fkps = FormattedDiskPagePAPX::GetAllPAPXFKPs( fib, wordStream, tableStream, dataStream );
      unsigned int i = 0;
	  FormattedDiskPagePAPX* fkp = NULL;

	  for (size_t i = 0; i < fkps->size(); ++i )
      {
		fkp = fkps->at(i);

        //the last entry of each is always the same as the first entry of the next FKP
        //so, ignore all last _entries except for the last FKP.
		int max_ = fkp->rgfcSize;
        
		if ( i++ < fkps->size() - 1 )
		{
		  max_--;
		}
         
		for ( int j = 0; j < max_; j++ )
        {
          if( ( fkp->rgfc[j] >= fcMin ) && ( fkp->rgfc[j] < fcMax ) )
		  {
			  cpList->push_back( fkp->rgfc[j] );
          }
        }

		RELEASEOBJECT( fkp );
	  }

	  fkps->clear();
	  RELEASEOBJECT( fkps );

      return cpList;
    }

	/*========================================================================================================*/

    /// Returnes a list of all ParagraphPropertyExceptions which correspond to text 
    /// between the given offsets.
	std::vector<ParagraphPropertyExceptions*>* FormattedDiskPagePAPX::GetParagraphPropertyExceptions
	(
      int fcMin,
      int fcMax,
      FileInformationBlock* fib, 
      POLE::Stream* wordStream, 
      POLE::Stream* tableStream,
      POLE::Stream* dataStream
	)
    {
      std::vector<ParagraphPropertyExceptions*>* ppxList = new std::vector<ParagraphPropertyExceptions*>();
	  std::vector<FormattedDiskPagePAPX*>* fkps = FormattedDiskPagePAPX::GetAllPAPXFKPs( fib, wordStream, tableStream, dataStream );
      
	  for (size_t i = 0; i < fkps->size(); ++i)
	  {
		  FormattedDiskPagePAPX* fkp = fkps->at(i);

		  for (unsigned int j = 0; j < fkp->grppapxSize; j++)
		  {
			  if ((fkp->rgfc[j] >= fcMin) && (fkp->rgfc[j] < fcMax))
			  {
				  ppxList->push_back(fkp->grppapx[j]);
			  }
		  }

		  RELEASEOBJECT(fkp);

		  fkps->clear();
		  RELEASEOBJECT(fkps);
	  }
      return ppxList;
	}
}