/*
   orxonox - the future of 3D-vertical-scrollers

   Copyright (C) 2004 orx

   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; either version 2, or (at your option)
   any later version.

   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.

   You should have received a copy of the GNU General Public License
   along with this program; if not, write to the Free Software Foundation,
   Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.


   ### File Specific:
   main-programmer: Patrick Boenzli
   co-programmer: Christian Meyer
   co-programmer: Benjamin Grauer: injected ResourceManager/GraphicsEngine/GUI
*/

#define DEBUG_SPECIAL_MODULE DEBUG_MODULE_ORXONOX
#include "orxonox.h"

#include "globals.h"

#include "gui/qt/qt_gui.h"
#include "gui/qt/qt_gui_datadir_fallback.h"

#include "parser/ini_parser/ini_parser.h"
#include "util/loading/game_loader.h"
#include "util/signal_handler.h"

//ENGINES
#include "graphics_engine.h"
#include "sound_engine.h"
#include "util/loading/resource_manager.h"
#include "cd_engine.h"
#include "text_engine.h"
#include "event_handler.h"

#include "util/loading/factory.h"
#include "fast_factory.h"

#include "benchmark.h"

#include "class_list.h"
#include "shell_command_class.h"
#include "shell_command.h"
#include "shell_buffer.h"

#include "util/loading/load_param_description.h"

#include "network_manager.h"

#include "state.h"
#include "lib/parser/preferences/cmd_line_prefs_reader.h"
#include "lib/parser/preferences/ini_file_prefs_reader.h"
#include <string.h>

int verbose = 5;

using namespace std;

SHELL_COMMAND(restart, Orxonox, restart);

REGISTER_ARG_FLAG( l, license,    "misc",  "showLicenseAndExit", "Prints the license and exit",      "1" );
REGISTER_ARG_FLAG( c, client,     "game",  "gameType",           "Connect to Server (-H)",           "multiplayer_client" );
REGISTER_ARG_FLAG( s, server,     "game",  "gameType",           "Start Orxonox as Game Server",     "multiplayer_server" );
REGISTER_ARG_ARG(  H, host,       "game",  "host",               "Host to connect to",               "host");
REGISTER_ARG_ARG(  p, port,       "game",  "port",               "Port to use",                      "port" );
REGISTER_ARG_FLAG( g, gui,        "game",  "showGui",            "starts the orxonox with the configuration GUI", "1");

REGISTER_ARG_FLAG( f, fullscreen, "video", "Fullscreen-mode",    "start Orxonox in fullscreen mode", "1");
REGISTER_ARG_FLAG( w, windowed,   "video", "Fullscreen-mode",    "start Orxonox in windowed mode",   "0");
REGISTER_ARG_ARG(  r, resolution, "video", "Resolution",         "Sets resolution / window size",    "res");

REGISTER_ARG_FLAG( a, audio,      "audio", "Disable-Audio",      "Enable audio",                     "0" );
REGISTER_ARG_FLAG( m, mute ,      "audio", "Disable-Audio",      "Disable audio",                    "1" );
REGISTER_ARG_ARG(  _, audio_channels, "audio", "Audio-Channels", "Sets # audio channels", "num" );
REGISTER_ARG_ARG(  _, music_volume, "audio", "Music-Volume", "Sets music volume", "vol" );
REGISTER_ARG_ARG(  _, effects_volume, "audio", "Effects-Volume", "Sets effects volume", "vol" );

#ifndef __WIN32__
REGISTER_ARG_FLAG( _, write_bt_to_file, "misc", "bt-to-file", "Write backtrace to file", "1");
#endif

REGISTER_ARG_ARG(  t, telnetport,  "network","telnetport",        "Port to use for network debug output",               "port" );
REGISTER_ARG_ARG(  _, write_dict,  "compression", "writedict",    "write packets to DATA/dicts/newdict",               "numBytes" );


/**
 *  create a new Orxonox

   In this funcitons only global values are set. The game will not be started here.
*/
Orxonox::Orxonox ()
{
  this->setClassID(CL_ORXONOX, "Orxonox");
  this->setName("orxonox-main");

  this->argc = 0;
  this->argv = NULL;

  /* this way, there is no network enabled: */
  this->serverName = "";
  this->port = -1;

  this->configFileName = "";
}

/**
 *  remove Orxonox from memory
*/
Orxonox::~Orxonox ()
{
  // game-specific
  delete GameLoader::getInstance();

  // class-less services/factories
  Factory::deleteFactories();
  FastFactory::deleteAll();
  OrxShell::ShellCommandClass::unregisterAllCommands();

  LoadClassDescription::deleteAllDescriptions();

  // handlers
  delete ResourceManager::getInstance(); // deletes the Resource Manager

  // engines
  delete CDEngine::getInstance();
  delete OrxSound::SoundEngine::getInstance();
  delete GraphicsEngine::getInstance(); // deleting the Graphics
  delete EventHandler::getInstance();

  // output-buffer
  delete OrxShell::ShellBuffer::getInstance();

  SDL_QuitSubSystem(SDL_INIT_TIMER);
  ClassList::debug();
  
  Preferences::getInstance()->save();

  PRINT(3)
  (
    "===================================================\n" \
    "Thanks for playing orxonox.\n" \
    "visit: http://www.orxonox.net for new versions.\n" \
    "===================================================\n" \
    ORXONOX_LICENSE_SHORT
  );

  Orxonox::singletonRef = NULL;
}

/**
 *  this is a singleton class to prevent duplicates
 */
Orxonox* Orxonox::singletonRef = NULL;

// DANGEROUS
void Orxonox::restart()
{
  //   int argc = this->argc;
  //   char** argv = this->argv;
  //
  //   Orxonox *orx = Orxonox::getInstance();
  //
  //   delete orx;
  //
  //   orx = Orxonox::getInstance();
  //
  //   if((*orx).init(argc, argv) == -1)
  //   {
  //     PRINTF(1)("! Orxonox initialization failed\n");
  //     return;
  //   }
  //
  //   printf("finished inizialisation\n");
  //   orx->start();
}

/**
 * @brief this finds the config file
 * @returns the new config-fileName
 * Since the config file varies from user to user and since one may want to specify different config files
 * for certain occasions or platforms this function finds the right config file for every occasion and stores
 * it's path and name into configfilename
*/
const std::string& Orxonox::getConfigFile ()
{
  File orxConfFile("orxonox.conf");
  if (orxConfFile.isFile())
  {
    this->configFileName =  "orxonox.conf";
  }
  else
    this->configFileName = File(DEFAULT_CONFIG_FILE).name();

  PRINTF(3)("Parsed Config File: '%s'\n", this->configFileName.c_str());
  return this->configFileName;
}

/**
 * initialize Orxonox with command line
 */
int Orxonox::init (int argc, char** argv, const std::string & name, int port)
{
  this->argc = argc;
  this->argv = argv;

  this->serverName = name;
  this->port = port;

  // initialize the Config-file
  this->getConfigFile();

  // windows must not write into stdout.txt and stderr.txt
  /*#ifdef __WIN32__
  freopen( "CON", "w", stdout );
  freopen( "CON", "w", stderr );
  #endif*/

  // initialize everything
  SDL_Init(0);
  if( initVideo() == -1)
    return -1;
  if( initResources () == -1)
    return -1;
  if( initSound() == -1)
    return -1;
  if( initInput() == -1)
    return -1;
  if( initNetworking () == -1)
    return -1;
  if( initMisc () == -1)
    return -1;

  return 0;
}


/**
 * initializes SDL and OpenGL
 */
int Orxonox::initVideo()
{
  PRINTF(3)("> Initializing video\n");

  GraphicsEngine::getInstance();

  GraphicsEngine::getInstance()->initFromPreferences();

  std::string iconName = ResourceManager::getFullName("pictures/fighter-top-32x32.bmp");
  if (!iconName.empty())
  {
    GraphicsEngine::getInstance()->setWindowName(PACKAGE_NAME " " PACKAGE_VERSION, iconName);
  }
  return 0;
}


/**
 * initializes the sound engine
 */
int Orxonox::initSound()
{
  PRINT(3)("> Initializing sound\n");
  // SDL_InitSubSystem(SDL_INIT_AUDIO);
  OrxSound::SoundEngine::getInstance();

  OrxSound::SoundEngine::getInstance()->loadSettings();
  OrxSound::SoundEngine::getInstance()->initAudio();
  return 0;
}


/**
 * initializes input functions
 */
int Orxonox::initInput()
{
  PRINT(3)("> Initializing input\n");

  EventHandler::getInstance()->init();
  EventHandler::getInstance()->subscribe(GraphicsEngine::getInstance(), ES_ALL, EV_VIDEO_RESIZE);

  return 0;
}


/**
 * initializes network system
 */
int Orxonox::initNetworking()
{
  PRINT(3)("> Initializing networking\n");

  if( this->serverName != "") // we are a client
  {
    State::setOnline(true);
    NetworkManager::getInstance()->establishConnection(this->serverName, port);
  }
  else if( this->port > 0)
  {    // we are a server
    State::setOnline(true);
    NetworkManager::getInstance()->createServer(port);
  }
  return 0;
}

//#include "util/loading/dynamic_loader.h"

/**
 * initializes and loads resource files
 */
int Orxonox::initResources()
{
  PRINTF(3)("> Initializing resources\n");

  PRINT(3)("initializing ResourceManager\n");

  // init the resource manager
  std::string dataPath;
  if ((dataPath = Preferences::getInstance()->getString(CONFIG_SECTION_GENERAL, CONFIG_NAME_DATADIR, ""))!= "")
  {
    if (!ResourceManager::getInstance()->setDataDir(dataPath) &&
        !ResourceManager::getInstance()->verifyDataDir(DEFAULT_DATA_DIR_CHECKFILE))
    {
      PRINTF(1)("Data Could not be located in %s\n", dataPath.c_str());
    }
  }


  while (!ResourceManager::getInstance()->verifyDataDir(DEFAULT_DATA_DIR_CHECKFILE))
  {

    PRINTF(1)("The DataDirectory %s could not be verified\n\nh" \
              "!!!  Please Change in File %s Section %s Entry %s to a suitable value !!!\n",
              ResourceManager::getInstance()->getDataDir().c_str(),
              this->configFileName.c_str(),
              CONFIG_SECTION_GENERAL,
              CONFIG_NAME_DATADIR );
    OrxGui::Gui* gui = new OrxGui::QtGuiDataDirFallback(argc, argv);
    gui->startGui();
    if (gui->getState() == OrxGui::Gui::Quitting)
      return(-1);
    delete gui;
    ResourceManager::getInstance()->setDataDir(Preferences::getInstance()->getString(CONFIG_SECTION_GENERAL, CONFIG_NAME_DATADIR, ""));

  }


  //! @todo this is a hack and should be loadable
  std::string imageDir = ResourceManager::getInstance()->getFullName("maps");
  ResourceManager::getInstance()->addImageDir(imageDir);
  imageDir = ResourceManager::getInstance()->getFullName("pictures");
  ResourceManager::getInstance()->addImageDir(imageDir);

  //  DynamicLoader::loadDyLib("libtest.so");
  return 0;
}

/**
 * initializes miscelaneous features
 * @return -1 on failure
 */
int Orxonox::initMisc()
{
  OrxShell::ShellBuffer::getInstance();

  // start the collision detection engine
  CDEngine::getInstance();

  return 0;
}

/**
 *  starts the orxonox game or menu
 * here is the central orxonox state manager. There are currently two states
 * - menu
 * - game-play
 * both states manage their states themselfs again.
*/
void Orxonox::start()
{

  this->gameLoader = GameLoader::getInstance();

  if( this->port != -1)
    this->gameLoader->loadNetworkCampaign("worlds/DefaultNetworkCampaign.oxc");
  else
    this->gameLoader->loadCampaign("worlds/DefaultCampaign.oxc");                       /* start orxonox in single player mode */

  //  this->gameLoader->loadDebugCampaign(DEBUG_CAMPAIGN_0);
  this->gameLoader->init();
  this->gameLoader->start();
}


/**
 * handles sprecial events from localinput
 * @param event: an event not handled by the CommandNode
 */
// void Orxonox::graphicsHandler(SDL_Event* event)
// {
//   // Handle special events such as reshape, quit, focus changes
//   switch (event->type)
//     {
//     case SDL_VIDEORESIZE:
//       GraphicsEngine* tmpGEngine = GraphicsEngine::getInstance();
//       tmpGEngine->resolutionChanged(event->resize);
//       break;
//     }
// }






bool showGui = false;

/**********************************
*** ORXONOX MAIN STARTING POINT ***
**********************************/
/**
 *
 *  main function
 *
 * here the journey begins
*/
int main(int argc, char** argv)
{
  CmdLinePrefsReader prefs;

  IniFilePrefsReader ini(File(DEFAULT_CONFIG_FILE).name());
  Preferences::getInstance()->setUserIni(File(DEFAULT_CONFIG_FILE).name());

  prefs.parse(argc, argv);

  if ( Preferences::getInstance()->getString("misc", "showLicenseAndExit", "") == "1" )
  {
    PRINT(0)(ORXONOX_LICENSE_SHORT);
    return 0;
  }

  if ( Preferences::getInstance()->getString("misc", "bt-to-file", "1") == "1" )
  {
    SignalHandler::getInstance()->doCatch( argv[0], "orxonox.backtrace" );
    SignalHandler::getInstance()->registerCallback( EventHandler::releaseMouse, NULL );
  }

  if( Preferences::getInstance()->getString("game", "showGui", "") == "1" )
    showGui = true;
  else if( Preferences::getInstance()->getString( "game", "gameType", "" ) == "multiplayer_server" ||
           Preferences::getInstance()->getString( "game", "gameType", "" ) == "multiplayer_client" )
    return startNetworkOrxonox(argc, argv);

  return startOrxonox(argc, argv, "", -1);
}



/**
 * starts orxonox in network mode
 * @param argc parameters count given to orxonox
 * @param argv parameters given to orxonox
 */
int startNetworkOrxonox(int argc, char** argv)
{

  std::string gameType = Preferences::getInstance()->getString( "game", "gameType", "" );

  if ( gameType == "multiplayer_client" )
  {
    int port = Preferences::getInstance()->getInt( "game", "port", DEFAULT_ORXONOX_PORT );
    std::string host = Preferences::getInstance()->getString( "game", "host", "" );

    if ( host == "" )
    {
      printf("You need to specify a host to connect to ( -H <host> )\n");
      return 1;
    }

    printf("Starting Orxonox as client: connecting to %s, on port %i\n", host.c_str(), port);

    startOrxonox(argc, argv, host.c_str(), port);
  }
  else if ( gameType == "multiplayer_server" )
  {
    int port = Preferences::getInstance()->getInt( "game", "port", DEFAULT_ORXONOX_PORT );

    printf("Starting Orxonox as server: listening on port %i\n", port);

    startOrxonox(argc, argv, "", port);
  }
  return 1;
}



/**
 * starts orxonox
 * @param argc parameters count given to orxonox
 * @param argv parameters given to orxonox
 */
int startOrxonox(int argc, char** argv, const std::string & name, int port)
{
  // checking for existence of the configuration-files, or if the lock file is still used
  if (showGui || (!File("./orxonox.conf").isFile() &&
                  !File(DEFAULT_CONFIG_FILE).isFile())
#if DEBUG_LEVEL <= 3 // developers do not need to see the GUI, when orxonox fails
      || ResourceManager::isFile(DEFAULT_LOCK_FILE)
#endif
     )
  {
    File lockFile(DEFAULT_LOCK_FILE);
    if (lockFile.isFile())
      lockFile.remove();

    // starting the GUI
    OrxGui::QtGui gui(argc, argv);
    gui.startGui();

    if (gui.getState() & OrxGui::Gui::Quitting)
      return 0;

  }

  PRINT(0)(">>> Starting Orxonox <<<\n");

  File(DEFAULT_LOCK_FILE).touch();

  Orxonox *orx = Orxonox::getInstance();

  if( orx->init(argc, argv, name, port) == -1)
  {
    PRINTF(1)("! Orxonox initialization failed\n");
    return -1;
  }

  printf("finished inizialisation\n");
  orx->start();

  delete orx;
  File("~/.orxonox/orxonox.lock").remove();
  return 0;
}