/*************************************************************************

"FreePastry" Peer-to-Peer Application Development Substrate 

Copyright 2002, Rice University. All rights reserved.

Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are
met:

- Redistributions of source code must retain the above copyright
notice, this list of conditions and the following disclaimer.

- Redistributions in binary form must reproduce the above copyright
notice, this list of conditions and the following disclaimer in the
documentation and/or other materials provided with the distribution.

- Neither  the name  of Rice  University (RICE) nor  the names  of its
contributors may be  used to endorse or promote  products derived from
this software without specific prior written permission.

This software is provided by RICE and the contributors on an "as is"
basis, without any representations or warranties of any kind, express
or implied including, but not limited to, representations or
warranties of non-infringement, merchantability or fitness for a
particular purpose. In no event shall RICE or contributors be liable
for any direct, indirect, incidental, special, exemplary, or
consequential damages (including, but not limited to, procurement of
substitute goods or services; loss of use, data, or profits; or
business interruption) however caused and on any theory of liability,
whether in contract, strict liability, or tort (including negligence
or otherwise) arising in any way out of the use of this software, even
if advised of the possibility of such damage.

********************************************************************************/
/*
 *  Created on Jul 13, 2005
 */
package rice.p2p.splitstream.testing;

import java.io.*;
import java.net.*;
import java.nio.channels.*;
import java.util.Random;

import rice.environment.Environment;
import rice.p2p.splitstream.ChannelId;
import rice.pastry.*;
import rice.pastry.socket.SocketPastryNodeFactory;
import rice.pastry.standard.RandomNodeIdFactory;

/**
 * @version $Id: pretty.settings 2305 2005-03-11 20:22:33Z jeffh $
 * @author Jeff Hoye
 */
public class SplitStreamDistTest {
  /**
   * DESCRIBE THE FIELD
   */
  public final static int DEFAULT_PORT = 53245;
  //13245;
  /**
   * DESCRIBE THE FIELD
   */
  public final static int WAIT_TO_JOIN_DELAY = 3000;
  // 300000;
  /**
   * DESCRIBE THE FIELD
   */
  public final static int WAIT_TO_SUBSCRIBE_DELAY = 3000;
  // 60000;
  /**
   * DESCRIBE THE FIELD
   */
  public final static int IM_ALIVE_PERIOD = 5000;

  /**
   * DESCRIBE THE FIELD
   */
  public static String INSTANCE = "DistSplitStreamTest";

//  public static final String BOOTNODE = "ricepl-3.cs.rice.edu";
  /**
   * DESCRIBE THE FIELD
   */
  public final static String BOOTNODE = "jeffh.cs.rice.edu";

  /**
   * DESCRIBE THE FIELD
   */
  public final static boolean nameSelf = true;

  /**
   * Usage java rice.p2p.splitstream.testing.SplitStreamDistTest
   * <artificialchurn?> <bootstrap> <port>
   *
   * <bootport>
   *
   * @param args
   * @throws Exception
   */
  public static void main(String[] args) throws Exception {

    String suffix = "";

    if (nameSelf) {
      suffix += "." + InetAddress.getLocalHost().getHostName();
    }
    String outfileString = "ss.txt" + suffix;

    // setup output
    PrintStream ps = new PrintStream(new FileOutputStream(outfileString, true));
    System.setErr(ps);
    System.setOut(ps);

    // setup environment
    final Environment env = new Environment();
    System.out.println("BOOTUP:" + env.getTimeSource().currentTimeMillis());

    // **************** parse args ***************
    // artificial churn
    boolean artificialChurn = false;
    if (args.length > 0) {
//      artificialChurn = Boolean.getBoolean(args[0]);
    }

    // parse non automatic bootstrap
    String bootNode = BOOTNODE;
    if (args.length > 1) {
      bootNode = args[1];
    }

    // parse non automatic port
    int port = DEFAULT_PORT;
    if (args.length > 2) {
      port = Integer.parseInt(args[2]);
    }

    boolean isBootNode = false;
    InetAddress localAddress = InetAddress.getLocalHost();
    if (localAddress.getHostName().startsWith(bootNode)) {
      isBootNode = true;
    }
    System.out.println("isBootNode:" + isBootNode);

    if (IM_ALIVE_PERIOD > 0) {
      new Thread(
        new Runnable() {
          public void run() {
            while (true) {
              System.out.println("ImALIVE:" + env.getTimeSource().currentTimeMillis());
              try {
                Thread.sleep(IM_ALIVE_PERIOD);
              } catch (Exception e) {
              }
            }
          }
        }, "ImALIVE").start();
    }

    if (!isBootNode) {
      int waitTime = env.getRandomSource().nextInt(WAIT_TO_JOIN_DELAY);
      System.out.println("Waiting for " + waitTime + " millis before continuing..." + env.getTimeSource().currentTimeMillis());
      Thread.sleep(waitTime);
      System.out.println("Starting connection process " + env.getTimeSource().currentTimeMillis());
    }

    // test port bindings before proceeding
    boolean success = false;
    while (!success) {
      try {
        InetSocketAddress bindAddress = new InetSocketAddress(InetAddress.getLocalHost(), port);

        // udp test
        DatagramChannel channel = DatagramChannel.open();
        channel.configureBlocking(false);
        channel.socket().bind(bindAddress);
        channel.close();

        ServerSocketChannel channel1 = ServerSocketChannel.open();
        channel1.configureBlocking(false);
        channel1.socket().bind(bindAddress);
        channel1.close();

        success = true;
      } catch (Exception e) {
        System.out.println("Couldn't bind on port " + port + " trying " + (port + 1));
        port++;

      }
    }
    InetAddress bootaddr = InetAddress.getByName(bootNode);

    // make bootport
    int bootport = port;
    if (args.length > 3) {
      bootport = Integer.parseInt(args[3]);
    }
    InetSocketAddress bootaddress = new InetSocketAddress(bootaddr, bootport);

    // Generate the NodeIds Randomly
    NodeIdFactory nidFactory = new RandomNodeIdFactory(env);

    // construct the PastryNodeFactory, this is how we use rice.pastry.socket
    PastryNodeFactory factory = new SocketPastryNodeFactory(nidFactory, port, env);

    // This will return null if we there is no node at that location
    NodeHandle bootHandle = ((SocketPastryNodeFactory) factory).getNodeHandle(bootaddress);

    if (bootHandle == null) {
      if (isBootNode) {
        // go ahead and start a new ring
      } else {
        // don't boot your own ring unless you are ricepl-1
        System.out.println("Couldn't find bootstrap... exiting.");
        System.exit(23);
      }
    }

    // construct a node, passing the null boothandle on the first loop will cause the node to start its own ring
    final PastryNode node = factory.newNode(bootHandle);
    System.out.println("Node " + node + " created.");

    Runtime.getRuntime().addShutdownHook(
      new Thread() {
        public void run() {
          System.out.println("SHUTDOWN " + env.getTimeSource().currentTimeMillis() + " " + node);
        }
      });

    synchronized (node) {
      while (!node.isReady()) {
        System.out.println("Waiting for node to go ready.  " + env.getTimeSource().currentTimeMillis());
        node.wait(5000);
      }
    }

//    if (!isBootNode) {
//      System.out.println("Sleeping a minute at "+env.getTimeSource().currentTimeMillis());
//      Thread.sleep(1*60*1000);
//      System.out.println("Done sleeping at "+env.getTimeSource().currentTimeMillis());
//    }
    MySplitStreamClient app = new MySplitStreamClient(node, INSTANCE);
    ChannelId CHANNEL_ID = new ChannelId(generateId());
    app.attachChannel(CHANNEL_ID);

    if (!isBootNode) {
      System.out.println("Sleeping(2) for " + WAIT_TO_SUBSCRIBE_DELAY + " at " + env.getTimeSource().currentTimeMillis());
      Thread.sleep(WAIT_TO_SUBSCRIBE_DELAY);
      System.out.println("Done(2) sleeping at " + env.getTimeSource().currentTimeMillis());
    }

    app.subscribeToAllChannels();
    if (isBootNode) {
      app.startPublishTask();
    }

    // this is to cause different connections to open
    if (artificialChurn) {
      while (true) {
        Thread.sleep(1 * 60 * 1000);
        if (!isBootNode) {
          if (env.getRandomSource().nextInt(60) == 0) {
            System.out.println("Killing self to cause churn. " + env.getTimeSource().currentTimeMillis() + ":" + node);
            System.exit(25);
          }
        }
      }
    }
  }

  /**
   * DESCRIBE THE METHOD
   *
   * @return DESCRIBE THE RETURN VALUE
   */
  private static Id generateId() {
    byte[] data = new byte[20];
    new Random(100).nextBytes(data);
    return rice.pastry.Id.build(data);
  }

}
