/*
    * Themis: Java Project Framework
    * Copyright 2012-2026. Tony Washer
    *
    * Licensed 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 io.github.tonywasher.joceanus.themis.lethe.analysis;
  
  import io.github.tonywasher.joceanus.oceanus.base.OceanusException;
  import io.github.tonywasher.joceanus.themis.exc.ThemisDataException;
  import io.github.tonywasher.joceanus.themis.lethe.analysis.ThemisAnalysisContainer.ThemisAnalysisAdoptable;
  import io.github.tonywasher.joceanus.themis.lethe.analysis.ThemisAnalysisStatement.ThemisAnalysisStatementHolder;
  
  import java.util.ArrayDeque;
  import java.util.Collections;
  import java.util.Deque;
  import java.util.Iterator;
  
  /**
   * Switch construct.
   */
  public class ThemisAnalysisSwitch
          implements ThemisAnalysisContainer, ThemisAnalysisAdoptable, ThemisAnalysisStatementHolder {
      /**
       * The switch value.
       */
      private final ThemisAnalysisStatement theSwitch;
  
      /**
       * The contents.
       */
      private final Deque<ThemisAnalysisElement> theContents;
  
      /**
       * The number of lines.
       */
      private final int theNumLines;
  
      /**
       * The parent.
       */
      private ThemisAnalysisContainer theParent;
  
      /**
       * Constructor.
       *
       * @param pParser the parser
       * @param pLine   the initial switch line
       * @throws OceanusException on error
       */
      ThemisAnalysisSwitch(final ThemisAnalysisParser pParser,
                           final ThemisAnalysisLine pLine) throws OceanusException {
          /* Access details from parser */
          theParent = pParser.getParent();
  
          /* Parse the switch */
          final Deque<ThemisAnalysisElement> myHeaders = ThemisAnalysisBuilder.parseHeaders(pParser, pLine);
          theNumLines = myHeaders.size() + 1;
          theSwitch = new ThemisAnalysisStatement(myHeaders);
  
          /* Parse the body */
          final Deque<ThemisAnalysisElement> myLines = ThemisAnalysisBuilder.processBody(pParser);
  
          /* Create a parser */
          theContents = new ArrayDeque<>();
          final ThemisAnalysisParser myParser = new ThemisAnalysisParser(myLines, theContents, theParent);
          processLines(myParser);
      }
  
      /**
       * process the lines.
       *
       * @param pParser the parser
       * @throws OceanusException on error
       */
      void processLines(final ThemisAnalysisParser pParser) throws OceanusException {
          /* Loop through the lines */
          while (pParser.hasLines()) {
              /* Access next line */
              final ThemisAnalysisLine myLine = (ThemisAnalysisLine) pParser.popNextLine();
  
              /* Process comments and blanks */
              final boolean processed = pParser.processCommentsAndBlanks(myLine)
                      || pParser.processCase(this, myLine);
  
              /* If we haven't processed yet */
              if (!processed) {
                  /* We should never reach here */
                  throw new ThemisDataException("Unexpected code in switch");
             }
         }
     }
 
     @Override
     public Deque<ThemisAnalysisElement> getContents() {
         return theContents;
     }
 
     @Override
     public Iterator<ThemisAnalysisStatement> statementIterator() {
         return Collections.singleton(theSwitch).iterator();
     }
 
     @Override
     public ThemisAnalysisContainer getParent() {
         return theParent;
     }
 
     @Override
     public void setParent(final ThemisAnalysisContainer pParent) {
         theParent = pParent;
     }
 
     @Override
     public int getNumLines() {
         return theNumLines;
     }
 
     @Override
     public String toString() {
         return theSwitch.toString();
     }
 }