#include <stdlib.h>

#include <applicat.h>
#include <config.h>
#include <utility.h>
#include <scanner.h>

// questo sara' il principale, per ora non c'e'
#define CONFIG_FILE        "prassi.ini"
// file parametri studio (uno per studio, per ora e' il principale)
#define CONFIG_FILE_STUDIO "prassis.ini"
// file parametri ditta (uno per ditta)
#define CONFIG_FILE_DITTA  "prassid.ini"

extern "C"
{
  int rename(const char*, const char*);
};

bool TConfig::_read_paragraph()
     // ritorna TRUE se il paragrafo c'era, FALSE altrimenti
{
  bool itwas = FALSE;
  _data.destroy();
  TScanner scan(_file);
  if (scan.paragraph(_paragraph))
    {
      itwas = TRUE;
      // populate array
      TString l, key, val;
      for (;;)
	{
	  l = scan.line();
	  if (l[0] == '#') continue;
	  if (l == "" || l[0] == '[') break;
	  int ind = l.find('=');
	  if (ind == -1) 
	    {
	      warning_box("Errore configurazione: file %s, vicino a riga %ud",
			  (const char*)_file, scan.linenum());
	      continue;
	    }
	  
	  key = l.left(ind);  key.trim();
	  val = l.mid(ind+1); val.trim();
	  // sostituzione abilitata
	  _data.add(key,val,TRUE);
	}
    }
  return itwas;
}

void TConfig::_write_paragraph(ofstream& out)
{
  _data.restart();            
  TString cnf(16);
  cnf << '[' << _paragraph << ']';
  out << cnf << '\n';  
  for (int i = 0; i < _data.items(); i++)
    {
      THash_object* o = _data.get_hashobj();
      out << o->key() << "\t= " << (TString&)(o->obj()) << '\n';
    }
  out << '\n';
}

void TConfig::_write_file()
{
  ifstream in(_file);       
  TFilename temp;
  temp.temp("__tmp__.cnf");
  ofstream out(temp);
  
  TFixed_string l(__tmp_string, sizeof(__tmp_string)); 
  TString cnf(16);
  cnf << '[' << _paragraph << ']';
  bool skip = FALSE, done = FALSE;

  while (!in.eof())
    {
      in.getline(__tmp_string,sizeof(__tmp_string)-1);
      l.trim();

      if (cnf == l)
	    {
	      // write paragraph and all variables
	      _write_paragraph(out);
	      skip = TRUE; done = TRUE;
	    }
      else 
       { 
      	  if (skip)  skip = l[0] != '[';
      	  if (!skip) out << l << '\n';
       }
    }
  // new paragraph
  if (!done) _write_paragraph(out);

  out.close(); in.close();
  TFilename bak(_file); bak.ext("bak");
  rename(_file,bak);
  fcopy(temp,_file);
  remove(temp);
}


void TConfig::_check_paragraph(const char* section)
{
 if (section != NULL && section != _paragraph)
    {
      if (_dirty) _write_file();
      _paragraph = section; 
      _dirty = FALSE;
      _read_paragraph();
    }
}

TString& TConfig::get(const char* var, const char* section, int index)
{
  // ritorna valore di variabile nella sezione corrente o in
  // quella specificata
  static TFixed_string s(__tmp_string, 256);
  TString vvar(var); if (index != -1) vvar << '(' << index << ')';
 
 _check_paragraph(section);

  if (_data.is_key(vvar)) 
    s = (TString&)_data[vvar];
  else 
  {
#ifdef DBG
    error_box("Can't find '%s' in section '%s' of '%s'", 
              var, (const char*)_paragraph, (const char*)_file);
#endif  
    s = "";
  }  

  return s;
}

long TConfig::get_long(const char* var, const char* section, int index)
{ 
  return atol(get(var,section,index)); 
}

bool TConfig::get_bool(const char* var, const char* section, int index)
{
  const TString& s = get(var, section, index).upper();
  return s != "" && (s == "X" || s == "ON" || s == "YES" || s == "OK" || s == "TRUE");
}


bool TConfig::set(const char* var, const char* value, const char* section, 
		  bool force, int index)
{
  // setta variabile nella sezione corrente o specificata
  // se force == TRUE crea la variabile se non esiste; altrimenti
  // da' errore; ritorna TRUE se la variabile c'era, FALSE diversamente

 _check_paragraph(section);
 TString vvar(var); if (index != -1) vvar << '(' << index << ')';

  bool itwas = _data.is_key(vvar);
 
  if (itwas && !force)
    warning_box("Tentativo di ridefinizione simbolo: %s", (const char*)vvar);
  else
    {
      _dirty = TRUE;
      _data.add(vvar, new TString(value), force);
    }
  return itwas;
}

bool TConfig::set(const char* var, long value, const char* section, 
		  bool force, int index)
{
  TString t; t << value;
  return set(var,t,section,force,index);
}

word TConfig::items(const char* var, const char* section)
{
  _check_paragraph(section);
  TString vvar(16);
  for (int cnt = 0; /* uncazzo */ ;cnt++)
    {
      vvar = var; vvar << '(' << cnt << ')';
      if (!_data.is_key(var))
	break;
    }
  return cnt;
}

TConfig::TConfig(int which_config, const char* paragraph) : 
                 _paragraph(paragraph), _dirty(FALSE), _ispresent(FALSE)
                 
{
  if (which_config < CONFIG_STUDIO) _file = CONFIG_FILE;
  else
  	if (which_config == CONFIG_STUDIO) _file = CONFIG_FILE_STUDIO;
  	else
  	{
  		 _file.format("%s/%s", MainApp()->get_firm_dir(), CONFIG_FILE_DITTA);
  		 if (!fexist(_file))
  		 {
  		 	fcopy(CONFIG_FILE_DITTA, _file);   
  		 	if (!fexist(_file))
  		 	 fatal_box("Impossibile aprire la configurazione %s", 
  									which_config < CONFIG_STUDIO ? "generale" :
  									which_config == CONFIG_STUDIO ? "di studio" : "della ditta");
  		 }
  	}	  
  if (_paragraph.empty())
    {
      _paragraph = MainApp()->name();
      _paragraph.cut(2);
    }
 _ispresent = _read_paragraph();
}

TConfig::~TConfig()
{
  // il distruttore riscrive il file con le modifiche se necessario 
  if (_dirty) _write_file();
}