/*
    Copyright (C) 2022 Nicola L.C. Talbot
    www.dickimaw-books.com

    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation; either version 3 of the License, or
    (at your option) any later version.

    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with this program; if not, write to the Free Software
    Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
*/
package com.dickimawbooks.texparserlib.latex.glossaries;

import java.io.IOException;

import com.dickimawbooks.texparserlib.*;
import com.dickimawbooks.texparserlib.latex.*;

public class GlsSetField extends AbstractGlsCommand
{
   public GlsSetField(String name, GlossariesSty sty)
   {
      this(name, false, false, sty);
   }

   public GlsSetField(String name, boolean expand, boolean global, GlossariesSty sty)
   {
      this(name, expand, global, true, sty);
   }

   public GlsSetField(String name, boolean expand, boolean global,
     boolean checkExists, GlossariesSty sty)
   {
      super(name, sty);
      this.expand = expand;
      this.global = global;
      this.checkExists = checkExists;
   }

   public Object clone()
   {
      return new GlsSetField(getName(), expand, global, checkExists, getSty());
   }

   @Override
   public boolean canExpand()
   {
      return false;
   }

   @Override
   public TeXObjectList expandonce(TeXParser parser, TeXObjectList stack)
     throws IOException
   {
      return null;
   }

   public void process(TeXParser parser, TeXObjectList stack)
     throws IOException
   {
      GlsLabel glslabel = popEntryLabel(parser, stack);

      String field = sty.getFieldName(popLabelString(parser, stack));

      TeXObject defn = popArg(parser, stack);

      GlossaryEntry entry = glslabel.getEntry();

      if (entry == null)
      {
         if (checkExists)
         {
            sty.undefWarnOrError(stack, 
              GlossariesSty.ENTRY_NOT_DEFINED, glslabel.getLabel());
         }
         else
         {
            String internalField = sty.getInternalFieldName(field);

            String csname = String.format("glo@%s@%s", 
               glslabel.getLabel(), internalField);

            sty.getParser().putControlSequence(!global,
               new GenericCommand(true, csname, null, defn));
         }
      }
      else
      {
         if (expand)
         {
            defn = TeXParserUtils.expandFully(defn, parser, stack);
         }

         entry.setField(field, defn, !global, stack);
      }
   }

   public void process(TeXParser parser)
     throws IOException
   {
      process(parser, parser);
   }

   protected boolean expand=false, global=false, checkExists=true;
}
