// BotConfig.C  -*- C++ -*-
// Copyright (C) 2004 Clinton Ebadi

// 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 of the License, or
// 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.

#include "BotConfig.H"
#include "Bot.H"
#include "StringTokenizer.H"
#include <iostream>
#include <string>
#include <list>
#include <algorithm>

BotConfig::BotConfig (std::string cf)
  : config_filename (cf)
{ }

bool BotConfig::read_config ()
{
  std::ifstream config_file (config_filename.c_str ());
  std::string current_line;
  unsigned int line_number = 1;

  options_db.clear ();

  if (!config_file)
    {
      // FIXME: log lines (needs local bot object, probably a
      // redesign. UGH).
      
      // Bot::logLine ("Error: Config File Not Found `" +
      // config_filename + "'");
      return false;
    }

  while (!config_file.eof ())
    {
      std::getline (config_file, current_line);
      if (current_line.length () == 0 || current_line[0] == '#')
	{
	  line_number++;
	  continue;
	}
      
      StringTokenizer st (current_line);
      std::string command = st.nextToken('=').trim().toUpper();
      StringTokenizer params (st.nextToken('=').trim());

      options_db[command] = t_option_values (t_value_list (), 
					    t_watcher_list ());
      while (params.hasMoreTokens (','))
	{
	  options_db[command].first.push_back (params.nextToken (',').trim());
	}
    }
  return true;
}


BotConfig::t_option_values BotConfig::get_option_values (std::string key)
{
  t_options_db::const_iterator cf_iter = 
    options_db.find (key);

  if (cf_iter != options_db.end ())
    return cf_iter->second;
  else
    return t_option_values (); // Empty vector
}

std::string BotConfig::set_config_file (std::string fname)
{
  std::string old_config_filename = config_filename;
  config_filename = fname;
  options_db.clear ();
  read_config ();
  return old_config_filename;
}

namespace
{
  struct push_back_
  {
    BotConfig::t_value_list* lst;
    
    push_back_ (BotConfig::t_value_list* l)
      : lst (l) 
    {}

    void operator()(BotConfig::t_value val)
    {
      lst->push_back (val);
    }
  };
}

void BotConfig::set_option_value (std::string key, t_value_list values, 
				  bool append)
{
  t_options_db::iterator cf_iter = options_db.find (key);
  if (cf_iter != options_db.end ())
    {
      if (append)
	{
	  // FIXME: Potentially slow (make this push_front in 3.0)
	  std::for_each (values.begin (), values.end (),
			 push_back_ (&cf_iter->second.first));
	}
	  else
	    cf_iter->second.first = values;
    }
}