/*
    * 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.commons.net.examples.mail;
  
  import java.io.BufferedReader;
  import java.io.FileNotFoundException;
  import java.io.FileReader;
  import java.io.IOException;
  import java.io.InputStreamReader;
  import java.io.PrintWriter;
  import java.io.Writer;
  import java.util.ArrayList;
  import java.util.List;
  
  import org.apache.commons.net.PrintCommandListener;
  import org.apache.commons.net.io.Util;
  import org.apache.commons.net.smtp.SMTPClient;
  import org.apache.commons.net.smtp.SMTPReply;
  import org.apache.commons.net.smtp.SimpleSMTPHeader;
  
  /**
   * This is an example program using the SMTP package to send a message
   * to the specified recipients.  It prompts you for header information and
   * a file name containing the message.
   */
  
  public final class SMTPMail
  {
  
      public static void main(final String[] args)
      {
          final String sender;
          final String recipient;
          final String subject;
          final String fileName;
          final String server;
          String cc;
          final List<String> ccList = new ArrayList<>();
          final BufferedReader stdin;
          FileReader fileReader = null;
          final Writer writer;
          final SimpleSMTPHeader header;
          final SMTPClient client;
  
          if (args.length < 1)
          {
              System.err.println("Usage: SMTPMail <smtpserver>");
              System.exit(1);
          }
  
          server = args[0];
  
          stdin = new BufferedReader(new InputStreamReader(System.in));
  
          try
          {
              System.out.print("From: ");
              System.out.flush();
  
              sender = stdin.readLine();
  
              System.out.print("To: ");
              System.out.flush();
  
              recipient = stdin.readLine();
  
              System.out.print("Subject: ");
              System.out.flush();
  
              subject = stdin.readLine();
  
              header = new SimpleSMTPHeader(sender, recipient, subject);
  
  
              while (true)
              {
                  System.out.print("CC <enter one address per line, hit enter to end>: ");
                  System.out.flush();
  
                  cc = stdin.readLine();
  
                  if (cc== null || cc.isEmpty()) {
                      break;
                  }
 
                 header.addCC(cc.trim());
                 ccList.add(cc.trim());
             }
 
             System.out.print("Filename: ");
             System.out.flush();
 
             fileName = stdin.readLine();
 
             try
             {
                 fileReader = new FileReader(fileName);
             }
             catch (final FileNotFoundException e)
             {
                 System.err.println("File not found. " + e.getMessage());
             }
 
             client = new SMTPClient();
             client.addProtocolCommandListener(new PrintCommandListener(
                                                   new PrintWriter(System.out), true));
 
             client.connect(server);
 
             if (!SMTPReply.isPositiveCompletion(client.getReplyCode()))
             {
                 client.disconnect();
                 System.err.println("SMTP server refused connection.");
                 System.exit(1);
             }
 
             client.login();
 
             client.setSender(sender);
             client.addRecipient(recipient);
 
 
 
             for (final String recpt : ccList) {
                 client.addRecipient(recpt);
             }
 
             writer = client.sendMessageData();
 
             if (writer != null)
             {
                 writer.write(header.toString());
                 Util.copyReader(fileReader, writer);
                 writer.close();
                 client.completePendingCommand();
             }
 
             if (fileReader != null ) {
                 fileReader.close();
             }
 
             client.logout();
 
             client.disconnect();
         }
         catch (final IOException e)
         {
             e.printStackTrace();
             System.exit(1);
         }
     }
 }