/**
    * Copyright (C) 2010-2012 Joerg Bellmann <joerg.bellmann@googlemail.com>
    *
    * 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 com.googlecode.t7mp.scanner;
  
  import java.io.File;
  import java.io.IOException;
  import java.util.Collection;
  import java.util.List;
  import java.util.Set;
  import java.util.TimerTask;
  
  import org.apache.commons.io.FileUtils;
  import org.apache.commons.io.FilenameUtils;
  
  import com.google.common.base.Predicates;
  import com.google.common.collect.Collections2;
  import com.googlecode.t7mp.PluginLog;
  import com.googlecode.t7mp.util.FileUtil;
  
  public final class ModifiedFileTimerTask extends TimerTask {
  
      private static final String DEF_STATIC = FilenameUtils.separatorsToSystem("src/main/webapp/");
      private static final String DEF_CLASSES = FilenameUtils.separatorsToSystem("target/classes/");
      private long lastrun = System.currentTimeMillis();
      private final File rootDirectory;
      private final File webappDirectory;
      private final List<String> suffixe;
      private final PluginLog log;
  
      public ModifiedFileTimerTask(File rootDirectory, File webappDirectory, List<String> suffixe, PluginLog log) {
          this.rootDirectory = rootDirectory;
          this.webappDirectory = webappDirectory;
          this.suffixe = suffixe;
          this.log = log;
      }
  
      @Override
      public void run() {
          long timeStamp = lastrun;
          lastrun = System.currentTimeMillis();
          Set<File> fileSet = FileUtil.getAllFiles(rootDirectory);
          Collection<File> changedFiles = Collections2.filter(fileSet,
                  Predicates.and(new ModifiedFilePredicate(timeStamp), new FileSuffixPredicate(suffixe)));
          for (File file : changedFiles) {
              String absolutePath = file.getAbsolutePath();
              String def = getResourceDef(absolutePath);
  
              int endIndex = absolutePath.lastIndexOf(def);
              String copyFragment = absolutePath.substring(endIndex + def.length());
              File copyToFile = new File(webappDirectory, copyFragment);
              log.debug("CHANGED: " + absolutePath);
              log.debug("COPY TO : " + copyToFile.getAbsolutePath());
              try {
                  FileUtils.copyFile(file, copyToFile);
                  FileUtils.touch(copyToFile);
              } catch (IOException e) {
                  e.printStackTrace();
              }
          }
          log.debug("-----------END SCAN-------------");
      }
  
      private String getResourceDef(String absolutePath) {
          if (absolutePath.lastIndexOf(DEF_STATIC) != -1) {
              return DEF_STATIC;
          } else {
              return DEF_CLASSES;
          }
      }
  }