package org.litesoft.p2pchat;

import java.io.*;
import java.util.*;


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//
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// hereby released into the public domain.
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// There is ABSOLUTELY NO WARRANTY OF ANY KIND: not for the design, fitness
// (for a particular purpose), level of errors (or lack thereof), or
// applicability of this software.  The entire risk as to the quality
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// NOTE: Should you discover a bug, have a recogmendation for a change, wish
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/**
 * @author  Devin Smith and George Smith
 * @version 0.4 08/04/13 Close Peer on removal
 * @version 0.3 02/02/02 Added IllegalArgument.ifNull for all public params that may not be null
 * @version 0.2 01/28/02 Refactored and Added Licence
 * @version 0.1 12/27/01 Initial Version
 */
public class ActivePeerManager
  implements ActivePeersSupport, PendingPeersSupport {
  private MyInfo zMyInfo;
  private UserDialog zUserDialog;
  private PendingPeerManager zPendingPeerManager;
  private Vector<ActivePeer> zListofPeers = new Vector<ActivePeer>();
  private int zPeerCnt = 0;

  public ActivePeerManager(MyInfo pMyInfo, UserDialog pUserDialog, PendingPeerManager pPendingPeerManager) {
    IllegalArgument.ifNull("MyInfo", zMyInfo = pMyInfo);
    IllegalArgument.ifNull("UserDialog", zUserDialog = pUserDialog);
    IllegalArgument.ifNull("PendingPeerManager", zPendingPeerManager = pPendingPeerManager);
    zUserDialog.setActivePeerManager(this);
    zPendingPeerManager.start(this);
  }

  public synchronized void removeActivePeer(ActivePeer pRequester) {
    IllegalArgument.ifNull("Requester", pRequester);
    zListofPeers.removeElement(pRequester);
    pRequester.close();
  }

  public synchronized void clear() {
    while (!zListofPeers.isEmpty()) {
      ActivePeer p = (ActivePeer) zListofPeers.lastElement();
      zListofPeers.removeElement(p);
      p.close();
    }
  }

  public synchronized PeerInfo[] getPeerInfos() {
    PeerInfo[] retval = new PeerInfo[zListofPeers.size()];
    for (int i = 0; i < retval.length; i++)
      retval[i] = ((ActivePeer) (zListofPeers.elementAt(i))).getPeerInfo();
    return retval;
  }

  public synchronized void sendToAllCHAT(String pMessage) {
    IllegalArgument.ifNull("Message", pMessage);
    for (Enumeration<ActivePeer> it = zListofPeers.elements(); it.hasMoreElements();)
      ((ActivePeer) it.nextElement()).sendCHAT(pMessage);
  }

  public synchronized void sendToAllNAME() {
    for (Enumeration<ActivePeer> it = zListofPeers.elements(); it.hasMoreElements();)
      ((ActivePeer) it.nextElement()).sendNAME();
  }

  public synchronized ActivePeer getPeerListenerByID(String pID) {
    if (pID != null)
      for (Enumeration<ActivePeer> it = zListofPeers.elements(); it.hasMoreElements();) {
        ActivePeer peer = (ActivePeer) it.nextElement();
        if (pID.equals(peer.getPeerInfo().getID()))
          return peer;
      }
    return null;
  }

  public synchronized ActivePeer getPeerListenerByInfo(PeerInfo info) {
    if (info != null) {
      for (Enumeration<ActivePeer> it = zListofPeers.elements(); it.hasMoreElements();) {
        ActivePeer peer = (ActivePeer) it.nextElement();
        if (info.equals(peer.getPeerInfo())) {
          return peer;
        }
      }
    }
    return null;
  }

  public synchronized boolean isAlreadyConnected(PeerInfo pPeerInfo) {
    if (pPeerInfo != null)
      for (Enumeration<ActivePeer> it = zListofPeers.elements(); it.hasMoreElements();)
        if (((ActivePeer) it.nextElement()).getPeerInfo().equals(pPeerInfo))
          return true;

    return false;
  }
  
  public synchronized void addActivePeer(PeerInfo pPeerInfo, InputStream pInputStream, OutputStream pOutputStream) {
    IllegalArgument.ifNull("PeerInfo", pPeerInfo);
    IllegalArgument.ifNull("InputStream", pInputStream);
    IllegalArgument.ifNull("OutputStream", pOutputStream);
    pPeerInfo.setID(String.valueOf(++zPeerCnt));
    zListofPeers.addElement(
      new ActivePeer(zMyInfo, zUserDialog, this, zPendingPeerManager,
                     pPeerInfo, pInputStream, pOutputStream));
  }

  public synchronized void addActivePeer(PeerInfo pPeerInfo, PeerReader reader, PeerWriter writer) {
    IllegalArgument.ifNull("PeerInfo", pPeerInfo);
    IllegalArgument.ifNull("PeerReader", reader);
    IllegalArgument.ifNull("PeerWriter", writer);
    pPeerInfo.setID(String.valueOf(++zPeerCnt));
    zListofPeers.addElement(
      new ActivePeer(zMyInfo, zUserDialog, this, zPendingPeerManager,
                     pPeerInfo, reader, writer));
  }
}