/* 
   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.

   ### File Specific:
   main-programmer: Christian Meyer
   co-programmer: Patrick Boenzli
*/

#define DEBUG_SPECIAL_MODULE DEBUG_MODULE_COMMAND_NODE

#include "command_node.h"
#include "keynames.h"
#include "ini_parser.h"
#include "world_entity.h"
#include "game_loader.h"
#include "world.h"
#include "list.h"
#include "orxonox.h"

#include <stdio.h>
#include <string.h>
#include <stdlib.h>

using namespace std;

/**
   \brief constructs a CommandNode to handle remote input
   \param ID: unique denumerator to identify the node in the network
*/
CommandNode::CommandNode (int ID)
{
  this->bound = new tList<WorldEntity>();
  this->aliases = NULL;
  this->netID = ID;
  this->bLocalInput = false;
  this->bEnabled = true;
  this->world = NULL;
}

/**
   \brief constructs a CommandNode to handle local input
   \param filename: The path and name of the file to load the key bindings from
*/
CommandNode::CommandNode (char* filename = DEFAULT_KEYBIND_FILE)
{
  this->aliases = NULL;
  this->bLocalInput = true;
  this->netID = 0;
  this->bound = new tList<WorldEntity>();
  this->bEnabled = true;
  this->world = NULL;
  this->loadBindings (filename);
}

/**
   \brief removes the CommandNode from memory
*/
CommandNode::~CommandNode ()
{
  if( aliases != NULL) free (aliases);
  if( bound != NULL) delete bound; /* \todo should this delete bound? dangerous FIX */
}


/**
  \brief this resets the command node

   deleting all data contained in the command node to fill it up again

  \todo coppling to different game-entities
  \todo reset/destroy has to be redesigned
*/

void CommandNode::reset()
{
  this->bound->destroy();
  //this->bound = NULL; /* \todo this produces a NULLpointer error.. FIX */
  this->bEnabled = false;
  this->world = NULL;
}

void CommandNode::enable(bool bEnabled)
{
  this->bEnabled = bEnabled;
}


/**
  \brief adds Node to a GameWorld

   this is usefull, if you want to catch events in a world class. usualy
   this is done automaticaly via GameLoader. Reset it via 
   CommandNode::reset()

*/
void CommandNode::addToWorld(World* world)
{
  this->world = world;
}


/**
   \brief loads new key bindings from a file
   \param filename: The path and name of the file to load the bindings from
*/
void CommandNode::loadBindings (char* filename)
{
  FILE* stream;
  
  PRINTF(4)("Loading key bindings from %s\n", filename);
  
  if( filename == NULL) filename = DEFAULT_KEYBIND_FILE;
  
  // remove old bindings if present
  if( aliases != NULL)
    {
      free (aliases);
      aliases = NULL;
    }
  
  // create parser
  IniParser parser (filename);
  if( parser.getSection ("Bindings") == -1)
    {
      PRINTF(1)("Could not find key bindings in %s\n", filename);
      return;
    }
  // allocate empty lookup table
  aliases = (KeyBindings*) calloc (1, sizeof (KeyBindings));
  
  char namebuf[256];
  char valuebuf[256];
  memset (namebuf, 0, 256);
  memset (valuebuf, 0, 256);
  int* index;
  
  while( parser.nextVar (namebuf, valuebuf) != -1)
    {
      index = nameToIndex (namebuf);
      switch( index[0])
	{
	case 0:
	  PRINTF(4)("Key binding %d(%s) set to %s\n", index[1], SDLKToKeyname( index[1]), valuebuf);
	  strcpy (aliases->keys[index[1]], valuebuf);
	  break;
	case 1:
	  PRINTF(4)("Button binding %d(%s) set to %s\n", index[1], SDLBToButtonname( index[1]), valuebuf);
	  strcpy (aliases->buttons[index[1]], valuebuf);
	  break;
	default:
	  break;
	}
      memset (namebuf, 0, 256);
      memset (valuebuf, 0, 256);
    }
}

/**
   \brief binds a WorldEntity to the CommandNode
   \param entity: Pointer to the entity to bind
*/
void CommandNode::bind (WorldEntity* entity)
{
  bound->add (entity);
}

/**
   \brief removes an entity from the list of the CommandNode
   \param entity: Pointer to the entity to relese
*/
void CommandNode::unbind (WorldEntity* entity)
{
  bound->remove (entity);
}

int* CommandNode::nameToIndex (char* name)
{
  coord[0] = -1;
  coord[1] = -1;
  int c;
  if( (c = keynameToSDLK (name)) != -1)
    {
      coord[1] = c;
      coord[0] = 0;
    }
  if( (c = buttonnameToSDLB (name)) != -1)
    {
      coord[1] = c;
      coord[0] = 1;
    }
  return coord;
}

/**
   \brief tells the CommandNode to run through all pending events and relay them accordingly
*/
void CommandNode::process ()
{
  if( this->bEnabled) 
    {
      if( bLocalInput) processLocal ();
      else processNetwork ();
    }
}

void CommandNode::processLocal ()
{
  SDL_Event event;
  Command cmd;
  while( SDL_PollEvent (&event))
    {
      PRINTF(3)("CommandNode::processLocal() =========================got Event\n");
      memset (cmd.cmd, 0, CMD_LENGHT); 
      switch( event.type)
	{
	case SDL_KEYDOWN:
	  strcpy (cmd.cmd, aliases->keys[event.key.keysym.sym]);
	  cmd.bUp = false;
	  if( strlen (cmd.cmd) > 0) relay(&cmd);
	  break;
	case SDL_KEYUP:
	  strcpy( cmd.cmd, aliases->keys[event.key.keysym.sym]);
	  cmd.bUp = true;
	  if( strlen (cmd.cmd) > 0) relay(&cmd);
	  break;
	case SDL_MOUSEMOTION:
	  strcpy( cmd.cmd, "cursor");
	  cmd.x = event.motion.x;
	  cmd.y = event.motion.y;
	  cmd.xrel = event.motion.xrel;
	  cmd.yrel = event.motion.yrel;
	  break;
	case SDL_MOUSEBUTTONUP:
	  strcpy( cmd.cmd, aliases->buttons[event.button.button]);
	  cmd.bUp = true;
	  if( strlen (cmd.cmd) > 0) relay(&cmd);
	  break;
	case SDL_MOUSEBUTTONDOWN:
	  strcpy( cmd.cmd, aliases->buttons[event.button.button]);
	  cmd.bUp = false;
	  if( strlen (cmd.cmd) > 0) relay(&cmd);
	  break;
	case SDL_JOYAXISMOTION:
	case SDL_JOYBALLMOTION:
	case SDL_JOYHATMOTION:
	case SDL_JOYBUTTONDOWN:
	case SDL_JOYBUTTONUP:
	  break;
	default:
	  Orxonox *orx = Orxonox::getInstance();
	  orx->eventHandler(&event);
	  break;
	}
    }
}


void CommandNode::processNetwork ()
{

}


void CommandNode::relay (Command* cmd)
{
  Orxonox *orx = Orxonox::getInstance();
  if( orx->systemCommand (cmd)) return;

  GameLoader* gl = GameLoader::getInstance();
  if( gl->worldCommand(cmd)) return;

  if( bLocalInput) sendOverNetwork (cmd);
  
  if( this->world->command(cmd)) return;

  WorldEntity* entity = bound->enumerate();
  while( entity != NULL)
    {
      entity->command (cmd); /*no absorbtion of command! strange*/
      entity = bound->nextElement();
    }
}


/**
   \brief sets the network identifier of the CommandNode
   \param ID: the new ID to use
*/
void CommandNode::setNetID (int ID)
{
  netID = ID;
}

void CommandNode::sendOverNetwork (Command* cmd)
{
}