/*
    * Derivative Work
    * Copyright SOFTEC sa. All rights reserved.
    *
    * Original work from yuicompressor-maven-plugin
    * Copyright David Bernard
    *
    * This library is free software; you can redistribute it and/or
    * modify it under the terms of the GNU Lesser General Public
   * License as published by the Free Software Foundation; either
   * version 2.1 of the License, or (at your option) any later version.
   *
   * This library 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
   * Lesser General Public License for more details.
   *
   * You should have received a copy of the GNU Lesser General Public
   * License along with this library; if not, write to the Free Software
   * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
   */
  package org.codehaus.mojo.javascript.compress;
  
  import org.mozilla.javascript.ErrorReporter;
  import org.mozilla.javascript.EvaluatorException;
  
  public class ErrorReporter4Mojo implements ErrorReporter {
  
      private String defaultFilename_;
      private boolean acceptWarn_;
      private JSCompressorLogger log_;
      private int warningCnt_;
      private int errorCnt_;
  
      public ErrorReporter4Mojo(JSCompressorLogger log, boolean jswarn) {
          log_ = log;
          acceptWarn_ = jswarn;
      }
  
      public JSCompressorLogger getLogger()
      {
          return log_;
      }
  
      public void setDefaultFileName(String v) {
          if (v.length() == 0) {
              v = null;
          }
          defaultFilename_ = v;
      }
  
      public int getErrorCnt() {
          return errorCnt_;
      }
  
      public int getWarningCnt() {
          return warningCnt_;
      }
  
      public void error(String message, String sourceName, int line, String lineSource, int lineOffset) {
          String fullMessage = newMessage(message, sourceName, line, lineSource, lineOffset);
          log_.error(fullMessage);
          errorCnt_++;
      }
  
      public EvaluatorException runtimeError(String message, String sourceName, int line, String lineSource, int lineOffset) {
          error(message, sourceName, line, lineSource, lineOffset);
          throw new EvaluatorException(message, sourceName, line, lineSource, lineOffset);
      }
  
      public void warning(String message, String sourceName, int line, String lineSource, int lineOffset) {
          if( message.indexOf("is declared but is apparently never used.") != -1
              || message.indexOf("Try to use a single 'var' statement per scope.") != -1) return;
          
          if (acceptWarn_) {
              String fullMessage = newMessage(message, sourceName, line, lineSource, lineOffset);
              log_.warn(fullMessage);
              warningCnt_++;
          }
      }
  
      private String newMessage(String message, String sourceName, int line, String lineSource, int lineOffset) {
          StringBuilder back = new StringBuilder();
          if ((sourceName == null) || (sourceName.length() == 0)) {
              sourceName = defaultFilename_;
          }
          if (sourceName != null) {
              back.append(sourceName)
                  .append(":line ")
                  .append(line)
                  .append(":column ")
                  .append(lineOffset)
                  .append(':')
                  ;
          }
          if ((message != null) && (message.length() != 0)) {
              back.append(message);
          } else {
              back.append("unknown error");
         }
         if ((lineSource != null) && (lineSource.length() != 0)) {
             back.append("\n\t")
                 .append(lineSource)
                 ;
         }
         return back.toString();
     }
 
 }