/*
 * 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.oodt.cas.protocol.cli.action;

//JDK imports
import java.io.File;
import java.net.URI;
import java.net.URISyntaxException;

//OODT imports
import org.apache.oodt.cas.cli.exception.CmdLineActionException;
import org.apache.oodt.cas.protocol.Protocol;
import org.apache.oodt.cas.protocol.ProtocolFile;
import org.apache.oodt.cas.protocol.system.ProtocolManager;

/**
 * A {@link ProtocolAction} which will downlaod a url
 * 
 * @author bfoster (Brian Foster)
 */
public class DownloadCliAction extends ProtocolCliAction {

   protected URI uri;
   protected String toDir;
   protected Protocol usedProtocol;

   @Override
   public void execute(ActionMessagePrinter printer)
         throws CmdLineActionException {
      try {
         usedProtocol = createProtocol(getProtocolManager());
         ProtocolFile fromFile = createProtocolFile();
         String toFilename = fromFile.equals(ProtocolFile.SEPARATOR)
               || fromFile.getName().isEmpty() ? uri.getHost() : fromFile
               .getName();
         File toFile = (toDir != null) ? new File(toDir, toFilename)
               : new File(toFilename);
         usedProtocol.get(fromFile, toFile.getAbsoluteFile());
      } catch (Exception e) {
         throw new CmdLineActionException("Failed to download : "
               + e.getMessage(), e);
      }
   }

   public void setUrl(String urlString) throws URISyntaxException {
      uri = new URI(urlString);
   }

   public void setToDir(String toDir) {
      this.toDir = toDir;
   }

   protected Protocol getUsedProtocol() {
      return usedProtocol;
   }

   protected ProtocolFile createProtocolFile() throws URISyntaxException {
      return new ProtocolFile(uri.getPath(), false);
   }

   protected Protocol createProtocol(ProtocolManager protocolManager)
         throws URISyntaxException {
      return protocolManager.getProtocolBySite(
            new URI(uri.getScheme(), uri.getHost(), null, null),
            getAuthentication(), null);
   }
}