/*
 * mcu.cxx
 *
 * Main MCU process routines for a simple MCU
 *
 * Copyright (C) 2000 Equivalence Pty. Ltd.
 * Copyright (C) 2004 Post Increment
 *
 * The contents of this file are subject to the Mozilla Public License
 * Version 1.0 (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.mozilla.org/MPL/
 *
 * Software distributed under the License is distributed on an "AS IS"
 * basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
 * the License for the specific language governing rights and limitations
 * under the License.
 *
 * The Original Code is Portable Windows Library.
 *
 * The Initial Developer of the Original Code is Equivalence Pty. Ltd.
 *
 * Portions of ths code were written by by Post Increment (http://www.postincrement.com) 
 * with the assistance of funding from Stonevoice, slc. http://www.stonevoice.com
 *
 * Portions of this code were written by Post Increment (http://www.postincrement.com) 
 * with the assistance of funding from Citron Networks (http://www.citron.com.tw)
 *
 * Contributor(s): Derek J Smithies (derek@indranet.co.nz)
 *                 Craig Southeren (craig@postincrement.com)
 *
 * $Log: mcu.cxx,v $
 * Revision 1.2  2007/10/20 12:04:57  shorne
 * Fix small compile error with ptlib v1.12
 *
 * Revision 1.1  2007/10/17 19:44:31  shorne
 * Initial Commit
 *
 * Revision 2.2.2.1  2007/08/16 20:29:01  shorne
 * Better Gatekeeper anf Gateway prefix support
 *
 * Revision 2.3  2007/02/12 23:36:23  csoutheren
 * Applied 1636260 - OpenMCU patch to have return link in web UI
 * Thanks to RM Fleming
 *
 * Revision 2.2  2006/07/14 05:28:01  csoutheren
 * Removed old code
 *
 * Revision 2.1  2006/06/09 04:39:59  csoutheren
 * Migrated VideoBranch to main trunk
 *
 * Revision 1.1.2.5  2006/04/26 13:09:08  csoutheren
 * Fix problem when connecting file not available
 * Add optional time limit for rooms
 *
 * Revision 1.1.2.4  2006/04/18 00:32:41  csoutheren
 * Removed dependence on custom.h
 *
 * Revision 1.1.2.3  2006/04/06 01:11:16  csoutheren
 * Latest sources include
 *   - premedia blanking and optional image display
 *   - ablity to defer conference join for authentication if required
 *   - more bulletproofing on conference join
 *   - new video copy/fill functions
 *
 * Revision 1.1.2.2  2006/04/06 00:50:30  csoutheren
 * Latest changes (more to come)
 *
 * Revision 1.1.2.1  2006/03/28 05:13:38  csoutheren
 * Normalised file headers
 * Fixed problem with QCIF video
 * Seperated H.323 and MCU process functions into seperate files
 *
 */

#include <ptlib.h>

#include "version.h"
#include "mcu.h"
#include "h323.h"

const WORD DefaultHTTPPort = 1420;

extern PHTTPServiceProcess::Info ProductInfo;

static const char LogLevelKey[]           = "Log Level";
static const char UserNameKey[]           = "Username";
static const char PasswordKey[]           = "Password";
static const char HttpPortKey[]           = "HTTP Port";

static const char CallLogFilenameKey[]    = "Call log filename";

#if P_SSL
static const char HTTPCertificateFileKey[]  = "HTTP Certificate";
#endif
static const char DefaultRoomKey[]          = "Default room";
static const char DefaultRoomTimeLimitKey[] = "Room time limit";

static const char DefaultCallLogFilename[] = "mcu_log.txt"; 
static const char DefaultRoom[]            = "room101";

#if OPENMCU_VIDEO
static const char ForceSplitVideoKey[]   = "Force split screen video";
#endif

#define new PNEW


///////////////////////////////////////////////////////////////

class MainStatusPage : public PServiceHTTPString
{
 // PCLASSINFO(MainStatusPage, PServiceHTTPString);

  public:
    MainStatusPage(OpenMCU & app, PHTTPAuthority & auth);
    
    virtual BOOL Post(
      PHTTPRequest & request,
      const PStringToString &,
      PHTML & msg
    );
  
  private:
    OpenMCU & app;
};

class InvitePage : public PServiceHTTPString
{
 // PCLASSINFO(InvitePage, PServiceHTTPString);

  public:
    InvitePage(OpenMCU & app, PHTTPAuthority & auth);

    virtual BOOL Post(
      PHTTPRequest & request,       // Information on this request.
      const PStringToString & data, // Variables in the POST data.
      PHTML & replyMessage          // Reply message for post.
    );
  
  private:
    OpenMCU & app;
};

///////////////////////////////////////////////////////////////
// This really isn't the default count only a counter
// for sending aliases and prefixes to the gatekeeper
int OpenMCU::defaultRoomCount = 5;

OpenMCU::OpenMCU()
  : OpenMCUProcessAncestor(ProductInfo)
{
  endpoint = NULL;
}

void OpenMCU::Main()
{
  Suspend();
}

BOOL OpenMCU::OnStart()
{
  // change to the default directory to the one containing the executable
  PDirectory exeDir = GetFile().GetDirectory();

#if defined(_WIN32) && defined(_DEBUG)
  // Special check to aid in using DevStudio for debugging.
  if (exeDir.Find("\\Debug\\") != P_MAX_INDEX)
    exeDir = exeDir.GetParent();
#endif
  exeDir.Change();

  httpNameSpace.AddResource(new PHTTPDirectory("data", "data"));
  httpNameSpace.AddResource(new PServiceHTTPDirectory("html", "html"));

  manager  = CreateConferenceManager();
  endpoint = CreateEndPoint(*manager);

  return PHTTPServiceProcess::OnStart();
}

void OpenMCU::OnStop()
{
  delete endpoint;
  endpoint = NULL;

  delete manager;
  manager = NULL;

  PHTTPServiceProcess::OnStop();
}

void OpenMCU::OnControl()
{
  // This function get called when the Control menu item is selected in the
  // tray icon mode of the service.
  PStringStream url;
  url << "http://";

  PString host = PIPSocket::GetHostName();
  PIPSocket::Address addr;
  if (PIPSocket::GetHostAddress(host, addr))
    url << host;
  else
    url << "localhost";

  url << ':' << DefaultHTTPPort;

  PURL::OpenBrowser(url);
}

BOOL OpenMCU::Initialise(const char * initMsg)
{
  PConfig cfg("Parameters");

  // Set log level as early as possible
//  SetLogLevel((PSystemLog::Level)cfg.GetInteger(LogLevelKey, GetLogLevel()));
#if PTRACING

    SetLogLevel(PSystemLog::Debug6);
    PTrace::Initialise(6,"c:\\trace.txt");

/*  if (GetLogLevel() >= PSystemLog::Warning)
    PTrace::SetLevel(GetLogLevel()-PSystemLog::Warning);
  else
    PTrace::SetLevel(0);
  PTrace::ClearOptions(PTrace::Timestamp);
  PTrace::SetOptions(PTrace::DateAndTime); */
#endif

  // Get the HTTP basic authentication info
  PString adminUserName = cfg.GetString(UserNameKey);
  PString adminPassword = PHTTPPasswordField::Decrypt(cfg.GetString(PasswordKey));

  PHTTPSimpleAuth authority(GetName(), adminUserName, adminPassword);

  // Create the parameters URL page, and start adding fields to it
  PConfigPage * rsrc = new PConfigPage(*this, "Parameters", "Parameters", authority);

  // HTTP authentication username/password
  rsrc->Add(new PHTTPStringField(UserNameKey, 25, adminUserName));
  rsrc->Add(new PHTTPPasswordField(PasswordKey, 25, adminPassword));

  // Log level for messages
  rsrc->Add(new PHTTPIntegerField(LogLevelKey,
                                  PSystemLog::Fatal, PSystemLog::NumLogLevels-1,
                                  GetLogLevel(),
                                  "1=Fatal only, 2=Errors, 3=Warnings, 4=Info, 5=Debug"));

#if P_SSL
  // SSL certificate file.
  PString certificateFile = cfg.GetString(HTTPCertificateFileKey, "server.pem");
  rsrc->Add(new PHTTPStringField(HTTPCertificateFileKey, 25, certificateFile));
  if (!SetServerCertificate(certificateFile, TRUE)) {
    PSYSTEMLOG(Fatal, "MCU\tCould not load certificate \"" << certificateFile << '"');
    return FALSE;
  }
#endif

  // HTTP Port number to use.
  WORD httpPort = (WORD)cfg.GetInteger(HttpPortKey, DefaultHTTPPort);
  rsrc->Add(new PHTTPIntegerField(HttpPortKey, 1, 32767, httpPort));

  endpoint->Initialise(cfg, rsrc);

  // get default "room" (conference) name
  defaultRoomName = cfg.GetString(DefaultRoomKey, DefaultRoom);
  rsrc->Add(new PHTTPStringField(DefaultRoomKey, 25, defaultRoomName));

  // get conference time limit 
  roomTimeLimit = cfg.GetInteger(DefaultRoomTimeLimitKey, 0);
  rsrc->Add(new PHTTPIntegerField(DefaultRoomTimeLimitKey, 0, 10800, roomTimeLimit));

  OnCreateConfigPage(cfg, *rsrc);

  // default log file name
  logFilename = cfg.GetString(CallLogFilenameKey, DefaultCallLogFilename);