/* ====================================================================
   Licensed to the Apache Software Foundation (ASF) under one or more
   contributor license agreements.  See the NOTICE file distributed with
   this work for additional information regarding copyright ownership.
   The ASF licenses this file to You under the Apache License, Version 2.0
   (the "License"); you may not use this file except in compliance with
   the License.  You may obtain a copy of the License at

       http://www.apache.org/licenses/LICENSE-2.0

   Unless required by applicable law or agreed to in writing, software
   distributed under the License is distributed on an "AS IS" BASIS,
   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   See the License for the specific language governing permissions and
   limitations under the License.
==================================================================== */

package org.apache.poi.hwpf.sprm;

import org.apache.logging.log4j.LogManager;
import org.apache.logging.log4j.Logger;
import org.apache.poi.hwpf.usermodel.ShadingDescriptor80;

import org.apache.poi.hwpf.model.Colorref;
import org.apache.poi.hwpf.model.Hyphenation;
import org.apache.poi.hwpf.model.StyleSheet;
import org.apache.poi.hwpf.usermodel.BorderCode;
import org.apache.poi.hwpf.usermodel.CharacterProperties;
import org.apache.poi.hwpf.usermodel.DateAndTime;
import org.apache.poi.hwpf.usermodel.ShadingDescriptor;
import org.apache.poi.util.Internal;
import org.apache.poi.util.LittleEndian;

@Internal
public final class CharacterSprmUncompressor extends SprmUncompressor
{
    private static final Logger LOG = LogManager.getLogger(CharacterSprmUncompressor.class);

    public CharacterSprmUncompressor()
  {
  }

    @Deprecated
    public static CharacterProperties uncompressCHP(
            CharacterProperties parent, byte[] grpprl, int offset )
    {
        CharacterProperties newProperties = parent.copy();
        applySprms( parent, grpprl, offset, true, newProperties );
        return newProperties;
    }

    public static CharacterProperties uncompressCHP( StyleSheet styleSheet,
            CharacterProperties parStyle, byte[] grpprl, int offset )
    {
        CharacterProperties newProperties;
        if ( parStyle == null )
        {
            parStyle = new CharacterProperties();
            newProperties = new CharacterProperties();
        }
        else
        {
            newProperties = parStyle.copy();
        }

        /*
         * not fully conform to specification, but the fastest way to make it
         * work. Shall be rewritten if any errors would be found -- vlsergey
         */
        Integer style = getIstd( grpprl, offset );
        if ( style != null )
        {
            try
            {
                applySprms( parStyle, styleSheet.getCHPX( style ), 0, false,
                        newProperties );
            }
            catch ( Exception exc )
            {
                LOG.atError().withThrowable(exc).log("Unable to apply all style {} CHP SPRMs to CHP", style);
            }
        }

        CharacterProperties styleProperties = newProperties;
        newProperties = styleProperties.copy();

        try
        {
            applySprms( styleProperties, grpprl, offset, true, newProperties );
        }
        catch ( Exception exc )
        {
            LOG.atError().withThrowable(exc).log("Unable to process all direct CHP SPRMs");
        }
        return newProperties;
    }

    private static void applySprms( CharacterProperties parentProperties,
            byte[] grpprl, int offset, boolean warnAboutNonChpSprms,
            CharacterProperties targetProperties )
    {
        SprmIterator sprmIt = new SprmIterator( grpprl, offset );

        while ( sprmIt.hasNext() )
        {
            SprmOperation sprm = sprmIt.next();

            if ( sprm.getType() != 2 )
            {
                if ( warnAboutNonChpSprms )
                {
                    LOG.atWarn().log("Non-CHP SPRM returned by SprmIterator: {}", sprm);
                }
                continue;
            }

            unCompressCHPOperation( parentProperties, targetProperties, sprm );
        }
    }

    private static Integer getIstd( byte[] grpprl, int offset )
    {
        Integer style = null;
        try
        {
            SprmIterator sprmIt = new SprmIterator( grpprl, offset );
            while ( sprmIt.hasNext() )
            {
                SprmOperation sprm = sprmIt.next();

                if ( sprm.getType() == 2 && sprm.getOperation() == 0x30 )
                {
                    // sprmCIstd (0x4A30)
                    style = Integer.valueOf( sprm.getOperand() );
                }
            }
        }
        catch ( Exception exc )
        {
            LOG.atError().withThrowable(exc).log("Unable to extract istd from direct CHP SPRM");
        }
        return style;
    }

  /**
   * Used in decompression of a chpx. This performs an operation defined by
   * a single sprm.
   *
   * @param oldCHP The base CharacterProperties.
   * @param newCHP The current CharacterProperties.
   * @param sprm an SPRM opearation
   */
  static void unCompressCHPOperation (CharacterProperties oldCHP,
                                      CharacterProperties newCHP,
                                      SprmOperation sprm)
  {

    switch (sprm.getOperation())
    {
      case 0:
        newCHP.setFRMarkDel (getFlag (sprm.getOperand()));
        break;
      case 0x1:
        newCHP.setFRMark (getFlag (sprm.getOperand()));
        break;
      case 0x2:
        newCHP.setFFldVanish (getFlag (sprm.getOperand()));
        break;
        case 0x3:
            // sprmCPicLocation -- 0x6A03
            /*
             * [MS-DOC]
             *
             * Page 104 of 622
             *
             * A signed 32-bit integer that specifies either the position in the
             * Data Stream of a picture or binary data or the name of an OLE
             * object storage.
             */
            newCHP.setFcPic( sprm.getOperand() );
            newCHP.setFSpec( true );
            break;
      case 0x4:
        newCHP.setIbstRMark ((short) sprm.getOperand());
        break;
      case 0x5:
        newCHP.setDttmRMark (new DateAndTime(sprm.getGrpprl(), sprm.getGrpprlOffset()));
        break;
      case 0x6:
        newCHP.setFData (getFlag (sprm.getOperand()));
        break;
      case 0x7:
        //don't care about this
        break;
      case 0x8:
        //short chsDiff = (short)((param & 0xff0000) >>> 16);
        int operand =sprm.getOperand();
        short chsDiff = (short) (operand & 0x0000ff);
        newCHP.setFChsDiff (getFlag (chsDiff));
        newCHP.setChse ((short) (operand & 0xffff00));
        break;
      case 0x9:
        newCHP.setFSpec (true);
        newCHP.setFtcSym (LittleEndian.getShort (sprm.getGrpprl(), sprm.getGrpprlOffset()));
        newCHP.setXchSym (LittleEndian.getShort (sprm.getGrpprl(), sprm.getGrpprlOffset() + 2));
        break;
      case 0xa:
        newCHP.setFOle2 (getFlag (sprm.getOperand()));
        break;
      case 0xb:

        // Obsolete
        break;
      case 0xc:
        newCHP.setIcoHighlight ((byte) sprm.getOperand());
        newCHP.setFHighlight (getFlag (sprm.getOperand()));
        break;
      case 0xd:

        //  undocumented
        break;
      case 0xe:
        newCHP.setFcObj (sprm.getOperand());
        break;
      case 0xf:

        // undocumented
        break;
      case 0x10:

        // undocumented
        break;

        // undocumented till 0x30

      case 0x11:
        // sprmCFWebHidden
        break;
      case 0x12:
        break;
      case 0x13:
        break;
      case 0x14:
        break;
      case 0x15:
        // sprmCRsidProp
        break;
      case 0x16:
        // sprmCRsidText
        break;
      case 0x17:
        // sprmCRsidRMDel
        break;
      case 0x18:
        // sprmCFSpecVanish
        break;
      case 0x19:
        break;
      case 0x1a:
        // sprmCFMathPr
        break;
      case 0x1b:
        break;
      case 0x1c:
        break;
      case 0x1d:
        break;
      case 0x1e:
        break;
      case 0x1f:
        break;
      case 0x20:
        break;
      case 0x21:
        break;
      case 0x22:
        break;
      case 0x23:
        break;
      case 0x24:
        break;
      case 0x25:
        break;
      case 0x26:
        break;
      case 0x27:
        break;
      case 0x28:
        break;
      case 0x29:
        break;
      case 0x2a:
        break;
      case 0x2b:
        break;
      case 0x2c:
        break;
      case 0x2d:
        break;
      case 0x2e:
        break;
      case 0x2f:
        break;
        case 0x30:
            newCHP.setIstd( sprm.getOperand() );
            // 0x30 is supported by uncompressCHP(...)
            break;
      case 0x31:

        //permutation vector for fast saves, who cares!
        break;
      case 0x32:
        newCHP.setFBold (false);
        newCHP.setFItalic (false);
        newCHP.setFOutline (false);
        newCHP.setFStrike (false);
        newCHP.setFShadow (false);
        newCHP.setFSmallCaps (false);
        newCHP.setFCaps (false);
        newCHP.setFVanish (false);
        newCHP.setKul ((byte) 0);
        newCHP.setIco ((byte) 0);
        break;
        case 0x33:
            // preserve the fSpec setting from the original CHP
            boolean fSpec = newCHP.isFSpec();
            newCHP = oldCHP.copy();
            newCHP.setFSpec( fSpec );
            return;
      case 0x34:
        // sprmCKcd
        break;
      case 0x35:
        newCHP.setFBold (getCHPFlag ((byte) sprm.getOperand(), oldCHP.isFBold ()));
        break;
      case 0x36:
        newCHP.setFItalic (getCHPFlag ((byte) sprm.getOperand(), oldCHP.isFItalic ()));
        break;
      case 0x37:
        newCHP.setFStrike (getCHPFlag ((byte) sprm.getOperand(), oldCHP.isFStrike ()));
        break;
      case 0x38:
        newCHP.setFOutline (getCHPFlag ((byte) sprm.getOperand(), oldCHP.isFOutline ()));
        break;
      case 0x39:
        newCHP.setFShadow (getCHPFlag ((byte) sprm.getOperand(), oldCHP.isFShadow ()));
        break;
      case 0x3a:
        newCHP.setFSmallCaps (getCHPFlag ((byte) sprm.getOperand(), oldCHP.isFSmallCaps ()));
        break;
      case 0x3b:
        newCHP.setFCaps (getCHPFlag ((byte) sprm.getOperand(), oldCHP.isFCaps ()));
        break;
      case 0x3c:
        newCHP.setFVanish (getCHPFlag ((byte) sprm.getOperand(), oldCHP.isFVanish ()));
        break;
      case 0x3d:
        newCHP.setFtcAscii ((short) sprm.getOperand());
        break;
      case 0x3e:
        newCHP.setKul ((byte) sprm.getOperand());
        break;
      case 0x3f:
        operand = sprm.getOperand();
        int hps = operand & 0xff;
        if (hps != 0)
        {
          newCHP.setHps (hps);
        }

        //byte cInc = (byte)(((byte)(param & 0xfe00) >>> 4) >> 1);
        byte cInc = (byte) ((operand & 0xff00) >>> 8);
        cInc >>>= 1;
        if (cInc != 0)
        {
          newCHP.setHps (Math.max (newCHP.getHps () + (cInc * 2), 2));
        }

        //byte hpsPos = (byte)((param & 0xff0000) >>> 8);
        byte hpsPos = (byte) ((operand & 0xff0000) >>> 16);
        if (hpsPos != (byte)0x80)
        {
          newCHP.setHpsPos (hpsPos);
        }
        boolean fAdjust = (operand & 0x0100) > 0;
        if (fAdjust && (hpsPos & 0xFF) != 128 && hpsPos != 0 && oldCHP.getHpsPos () == 0)
        {
          newCHP.setHps (Math.max (newCHP.getHps () + ( -2), 2));
        }
        if (fAdjust && hpsPos == 0 && oldCHP.getHpsPos () != 0)
        {
          newCHP.setHps (Math.max (newCHP.getHps () + 2, 2));
        }
        break;
      case 0x40:
        newCHP.setDxaSpace (sprm.getOperand());
        break;
      case 0x41:
        newCHP.setLidDefault ((short) sprm.getOperand());
        break;
      case 0x42:
        newCHP.setIco ((byte) sprm.getOperand());
        break;
      case 0x43:
        newCHP.setHps (sprm.getOperand());
        break;
      case 0x44:
        byte hpsLvl = (byte) sprm.getOperand();
        newCHP.setHps (Math.max (newCHP.getHps () + (hpsLvl * 2), 2));
        break;
      case 0x45:
        newCHP.setHpsPos ((short) sprm.getOperand());
        break;
      case 0x46:
        if (sprm.getOperand() != 0)
        {
          if (oldCHP.getHpsPos () == 0)
          {
            newCHP.setHps (Math.max (newCHP.getHps () + ( -2), 2));
          }
        }
        else
        {
          if (oldCHP.getHpsPos () != 0)
          {
            newCHP.setHps (Math.max (newCHP.getHps () + 2, 2));
          }
        }
        break;
      case 0x47:
        /*CharacterProperties genCHP = new CharacterProperties ();
        genCHP.setFtcAscii (4);
        genCHP = (CharacterProperties) unCompressProperty (varParam, genCHP,
          styleSheet);
        CharacterProperties styleCHP = styleSheet.getStyleDescription (oldCHP.
          getBaseIstd ()).getCHP ();
        if (genCHP.isFBold () == newCHP.isFBold ())
        {
          newCHP.setFBold (styleCHP.isFBold ());
        }
        if (genCHP.isFItalic () == newCHP.isFItalic ())
        {
          newCHP.setFItalic (styleCHP.isFItalic ());
        }
        if (genCHP.isFSmallCaps () == newCHP.isFSmallCaps ())
        {
          newCHP.setFSmallCaps (styleCHP.isFSmallCaps ());
        }
        if (genCHP.isFVanish () == newCHP.isFVanish ())
        {
          newCHP.setFVanish (styleCHP.isFVanish ());
        }
        if (genCHP.isFStrike () == newCHP.isFStrike ())
        {
          newCHP.setFStrike (styleCHP.isFStrike ());
        }
        if (genCHP.isFCaps () == newCHP.isFCaps ())
        {
          newCHP.setFCaps (styleCHP.isFCaps ());
        }
        if (genCHP.getFtcAscii () == newCHP.getFtcAscii ())
        {
          newCHP.setFtcAscii (styleCHP.getFtcAscii ());
        }
        if (genCHP.getFtcFE () == newCHP.getFtcFE ())
        {
          newCHP.setFtcFE (styleCHP.getFtcFE ());
        }
        if (genCHP.getFtcOther () == newCHP.getFtcOther ())
        {
          newCHP.setFtcOther (styleCHP.getFtcOther ());
        }
        if (genCHP.getHps () == newCHP.getHps ())
        {
          newCHP.setHps (styleCHP.getHps ());
        }
        if (genCHP.getHpsPos () == newCHP.getHpsPos ())
        {
          newCHP.setHpsPos (styleCHP.getHpsPos ());
        }
        if (genCHP.getKul () == newCHP.getKul ())
        {
          newCHP.setKul (styleCHP.getKul ());
        }
        if (genCHP.getDxaSpace () == newCHP.getDxaSpace ())
        {
          newCHP.setDxaSpace (styleCHP.getDxaSpace ());
        }
        if (genCHP.getIco () == newCHP.getIco ())
        {
          newCHP.setIco (styleCHP.getIco ());
        }
        if (genCHP.getLidDefault () == newCHP.getLidDefault ())
        {
          newCHP.setLidDefault (styleCHP.getLidDefault ());
        }
        if (genCHP.getLidFE () == newCHP.getLidFE ())
        {
          newCHP.setLidFE (styleCHP.getLidFE ());
        }*/
        break;
      case 0x48:
        newCHP.setIss ((byte) sprm.getOperand());
        break;
      case 0x49:
        newCHP.setHps (LittleEndian.getShort (sprm.getGrpprl(), sprm.getGrpprlOffset()));
        break;
      case 0x4a:
        int increment = LittleEndian.getShort (sprm.getGrpprl(), sprm.getGrpprlOffset());
        newCHP.setHps (Math.max (newCHP.getHps () + increment, 8));
        break;
      case 0x4b:
        newCHP.setHpsKern (sprm.getOperand());
        break;
        // Microsoft Office Word 97-2007 Binary File Format (.doc) Specification
        // Page 59 of 210
        case 0x4c:
            // sprmCMajority50 -- 0xCA4C
            // unCompressCHPOperation (oldCHP, newCHP, 0x47, param, varParam,
            // styleSheet, opSize);
            break;
        case 0x4d:
            // sprmCHpsMul -- 0x4A4D
            float percentage = sprm.getOperand() / 100.0f;
            int add = (int) ( percentage * newCHP.getHps() );
            newCHP.setHps( newCHP.getHps() + add );
            break;
        case 0x4e:
            // sprmCHresi -- 0x484e
            Hyphenation hyphenation = new Hyphenation(
                    (short) sprm.getOperand() );
            newCHP.setHresi( hyphenation );
            break;
      case 0x4f:
        newCHP.setFtcAscii ((short) sprm.getOperand());
        break;
      case 0x50:
        newCHP.setFtcFE ((short) sprm.getOperand());
        break;
      case 0x51:
        newCHP.setFtcOther ((short) sprm.getOperand());
        break;
      case 0x52:
        // sprmCCharScale
        break;
      case 0x53:
        newCHP.setFDStrike (getFlag (sprm.getOperand()));
        break;
      case 0x54:
        newCHP.setFImprint (getFlag (sprm.getOperand()));
        break;
        case 0x55:
            // sprmCFSpec -- 0x0855
            newCHP.setFSpec( getFlag( sprm.getOperand() ) );
            break;
      case 0x56:
        newCHP.setFObj (getFlag (sprm.getOperand()));
        break;
        case 0x57:
            // sprmCPropRMark -- 0xCA57
            /*
             * Microsoft Office Word 97-2007 Binary File Format (.doc)
             * Specification
             *
             * Page 78 of 210
             *
             * sprmCPropRMark (opcode 0xCA57) is interpreted by moving the first
             * parameter byte to chp.fPropRMark, the next two bytes to
             * chp.ibstPropRMark, and the remaining four bytes to
             * chp.dttmPropRMark.
             */
            byte[] buf = sprm.getGrpprl();
            int offset = sprm.getGrpprlOffset();
            newCHP.setFPropRMark( buf[offset] != 0 );
            newCHP.setIbstPropRMark( LittleEndian.getShort( buf, offset + 1 ) );
            newCHP.setDttmPropRMark( new DateAndTime( buf, offset + 3 ) );
            break;
      case 0x58:
        newCHP.setFEmboss (getFlag (sprm.getOperand()));
        break;
      case 0x59:
        newCHP.setSfxtText ((byte) sprm.getOperand());
        break;
      case 0x5a:
        // sprmCFBiDi
        break;
      case 0x5b:
        break;
      case 0x5c:
        // sprmCFBoldBi
        break;
      case 0x5d:
        // sprmCFItalicBi
        break;
      case 0x5e:
        // sprmCFtcBi
        break;
      case 0x5f:
        // sprmCLidBi
        break;
      case 0x60:
        // sprmCIcoBi
        break;
      case 0x61:
        // sprmCHpsBi
        break;
        case 0x62:
            // sprmCDispFldRMark -- 0xCA62
            /*
             * Microsoft Office Word 97-2007 Binary File Format (.doc)
             * Specification
             *
             * Page 78 of 210
             *
             * sprmCDispFldRMark (opcode 0xCA62) is interpreted by moving the
             * first parameter byte to chp.fDispFldRMark, the next two bytes to
             * chp.ibstDispFldRMark, the next four bytes to
             * chp.dttmDispFldRMark, and the remaining 32 bytes to
             * chp.xstDispFldRMark.
             */
            byte[] xstDispFldRMark = new byte[32];
            buf = sprm.getGrpprl();
            offset = sprm.getGrpprlOffset();
            newCHP.setFDispFldRMark( 0 != buf[offset] );
            newCHP.setIbstDispFldRMark( LittleEndian.getShort( buf, offset + 1 ) );
            newCHP.setDttmDispFldRMark( new DateAndTime( buf, offset + 3 ) );
            System.arraycopy( buf, offset + 7, xstDispFldRMark, 0, 32 );
            newCHP.setXstDispFldRMark( xstDispFldRMark );
            break;
      case 0x63:
        newCHP.setIbstRMarkDel ((short) sprm.getOperand());
        break;
      case 0x64:
        newCHP.setDttmRMarkDel (new DateAndTime(sprm.getGrpprl(), sprm.getGrpprlOffset()));
        break;
      case 0x65:
        newCHP.setBrc (new BorderCode(sprm.getGrpprl(), sprm.getGrpprlOffset()));
        break;
        case 0x66:
            // sprmCShd80
            /*
             * "A Shd80 structure that specifies the background shading for the text. By default, text is not shaded."
             *
             * Word (.doc) Binary File Format. Copyright (c) 2011 Microsoft
             * Corporation. Release: Tuesday, March 15, 2011
             */
            ShadingDescriptor80 oldDescriptor = new ShadingDescriptor80(
                    sprm.getGrpprl(), sprm.getGrpprlOffset() );
            ShadingDescriptor newDescriptor = oldDescriptor
                    .toShadingDescriptor();
            newCHP.setShd( newDescriptor );
            break;
      case 0x67:
        // Obsolete
        break;
      case 0x68:
        //  sprmCFUsePgsuSettings
        break;
      case 0x69:
        break;
      case 0x6a:
        break;
      case 0x6b:
        break;
      case 0x6c:
        break;
      case 0x6d:
        newCHP.setLidDefault ((short) sprm.getOperand());
        break;
      case 0x6e:
        newCHP.setLidFE ((short) sprm.getOperand());
        break;
      case 0x6f:
        newCHP.setIdctHint ((byte) sprm.getOperand());
        break;
        case 0x70:
            // sprmCCv -- 0x6870
            newCHP.setCv( new Colorref( sprm.getOperand() ) );
            break;
      case 0x71:
        // sprmCShd
        break;
      case 0x72:
        // sprmCBrc
        break;
      case 0x73:
        // sprmCRgLid0
        break;
      case 0x74:
          // sprmCRgLid1
          break;
        case 0x75:
            // sprmCFNoProof -- 0x875
            /*
             * "A ToggleOperand value that specifies whether the text is excluded from the proofing analysis. By default, text is not excluded from the proofing analysis."
             *
             * Word (.doc) Binary File Format. Copyright (c) 2012 Microsoft
             * Corporation. Released: October 8, 2012
             */
            newCHP.setFNoProof(getCHPFlag((byte) sprm.getOperand(),
                    oldCHP.isFNoProof()));
            break;
      default:
          LOG.atDebug().log("Unknown CHP sprm ignored: {}", sprm);
          break;
    }
  }

  private static boolean getCHPFlag (byte x, boolean oldVal)
  {
    /*
         switch(x)
         {
     case 0:
       return false;
     case 1:
       return true;
     case (byte)0x80:
       return oldVal;
     case (byte)0x81:
       return !oldVal;
     default:
       return false;
         }
     */
    if (x == 0)
    {
      return false;
    }
    else if (x == 1)
    {
      return true;
    }
    else if ((x & 0x81) == 0x80)
    {
      return oldVal;
    }
    else if ((x & 0x81) == 0x81)
    {
      return!oldVal;
    }
    else
    {
      return false;
    }
  }

}
