/**
 * hermes antispam proxy
 * Copyright (C) 2006, 2007 Juan José Gutiérrez de Quevedo <juanjo@gutierrezdequevedo.com>
 *
 * 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; version 2 of the License
 *
 * 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.,
 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * @author Juan José Gutiérrez de Quevedo <juanjo@gutierrezdequevedo.com>
 */
#include "Configfile.h"

#include <unistd.h>

extern LOGGER_CLASS hermes_log;

/**
 * default config
 *
 */
Configfile::Configfile()
{
%templ_default_values%
}

void Configfile::parse(string file)
{
  ifstream f;
  char line[255];
  int equalpos;

  LINF("parsing "+Utils::get_canonical_filename(file)+" configuration file");
  f.open(file.c_str(),ios::in);
  while(!f.eof())
  {
    f.getline(line,255);
    string l=Utils::trim(line);
    if('#'!=l[0]&&l!=""&&l.find("="))
    {
      equalpos=l.find("=");
      string option=Utils::trim(l.substr(0,equalpos));
      string value=Utils::trim(l.substr(equalpos+1));
      //if(false==cfg.getBackground())
      //  cout << option << " -> " << value << endl;

      //this is a bit of a hack, but simplifies a lot this function
      #define PARSE_INT(x,y) if(x==option) y=Configfile::parseAsInt(value); else
      #define PARSE_BOOL(x,y) if(x==option) y=Configfile::parseAsBool(value); else
      #define PARSE_STRING(x,y) if(x==option) y=Configfile::parseAsString(value); else
      #define PARSE_LIST(x,y) if(x==option) y=Configfile::parseAsList(value); else

      %templ_parsevars%
      {
        throw Exception("Option \""+option+"\" with value \""+value+"\" is not recognized",__FILE__,__LINE__);
      }
      #undef PARSE_INT
      #undef PARSE_BOOL
      #undef PARSE_STRING
      #undef PARSE_LIST
    }
  }
  #ifndef WIN32
    uid=Utils::usertouid(user);
    gid=Utils::grouptogid(group);
  #endif //WIN32
  f.close();
}

//again, this is a BIG HACK, but it simplifies code a lot
#define GET_VAR(x,y,z) z Configfile::x(){ return y;}

GET_VAR(getUid,uid,int)
GET_VAR(getGid,gid,int)
%templ_getmethods%

#undef GET_VAR

void Configfile::validateConfig()
{
  #ifndef WIN32
    //check if we are root if we want to bind to a port lower than 1024
    if(getuid()!=0&&listening_port<1024)
      throw Exception(_("You can't bind to a port lower than 1024 without being root"),__FILE__,__LINE__);
  #endif //WIN32

  #ifdef HAVE_SSL
    //check if ssl is usable
    if(!Utils::file_exists(certificate_file))
      throw Exception("Certificate file "+certificate_file+" doesn't exist.\nTo generate a certificate look in hermesrc.example, there is an example there.",__FILE__,__LINE__);

    if(!Utils::file_exists(private_key_file))
      throw Exception("Private key file "+private_key_file+" doesn't exist.\nTo generate a private key look in hermesrc.example, there is an example there.",__FILE__,__LINE__);
  #endif //HAVE_SSL

  #ifndef WIN32
  //check if chroot dir exist //TODO: check that files needed in chroot exist
  //for now only /etc/resolv.conf, but we're working on it :-D
  if(""!=chroot&&!Utils::dir_exists(chroot))
    throw Exception("Directory "+chroot+" doesn't exist, can't chroot to it.",__FILE__,__LINE__);
  #endif //WIN32

  //check if we have submit_stats on but no user and password
  if(getSubmitStats()&&(""==getSubmitStatsUsername()||""==getSubmitStatsPassword()))
    throw Exception("You have configured hermes to send stats, but have not configured a username or password.\n"
      "If you don't have one, go to http://www.hermes-project.com and register there",__FILE__,__LINE__);

  #ifndef HAVE_SSL
  //check if we have activated submit_stats_ssl not having ssl activated
  if(getSubmitStatsSsl())
    throw Exception("You have configured stats submission through SSL, but hermes was compiled without SSL support",__FILE__,__LINE__);
  #endif //HAVE_SSL
  
}

string Configfile::parseAsString(string str)
{
  //remove "" round the string
  if('"'==str[0])
    str=str.substr(1);
  if('"'==str[str.length()-1])
    str=str.substr(0,str.length()-1);

  return str;
}

bool Configfile::parseAsBool(string str)
{
  if("yes"==str||"on"==str||"1"==str||"true"==str)
    return true;
  else
    return false;
}

long int Configfile::parseAsInt(string str)
{
  long int value;

  errno=0; //to know why we do this, read NOTES on strtol(3)
  value=strtol(str.c_str(),NULL,10);
  if(errno)
    throw Exception("Error parsing as int ("+Utils::errnotostrerror(errno)+")",__FILE__,__LINE__);

  return value;
}

list<string> Configfile::parseAsList(string str)
{
  list<string> tmpList;
  string::size_type startpos=0,endpos=0,len;
  string tmpstr;

  str=Configfile::parseAsString(str); //remove quotes around string

  len=str.length();
  while(startpos<len&&string::npos!=endpos)
  {
    endpos=str.find(',',startpos);
    if(string::npos==endpos)
      tmpstr=str.substr(startpos);
    else
      tmpstr=str.substr(startpos,endpos-startpos);
    tmpList.push_back(Utils::trim(tmpstr));
    startpos=endpos+1;
  }

  return tmpList;
}