/***************************************************************************
 *   Copyright (C) 2004-2007 by Joachim Eibl                               *
 *   joachim.eibl at gmx.de                                                   *
 *                                                                         *
 *   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     *
 *   (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.,                                       *
 *   51 Franklin Steet, Fifth Floor, Boston, MA 02110-1301, USA.           *
 ***************************************************************************/

#include "common.h"
#include <map>
#include <qfont.h>
#include <qcolor.h>
#include <qsize.h>
#include <qpoint.h>
#include <qstringlist.h>
#include <qtextstream.h>

ValueMap::ValueMap()
{
}

ValueMap::~ValueMap()
{
}

void ValueMap::save( QTextStream& ts )
{
   std::map<QString,QString>::iterator i;
   for( i=m_map.begin(); i!=m_map.end(); ++i)
   {
      QString key = i->first;
      QString val = i->second;
      ts << key << "=" << val << "\n";
   }
}

QString ValueMap::getAsString()
{
   QString result;
   std::map<QString,QString>::iterator i;
   for( i=m_map.begin(); i!=m_map.end(); ++i)
   {
      QString key = i->first;
      QString val = i->second;
      result += key + "=" + val + "\n";
   }
   return result;
}

void ValueMap::load( QTextStream& ts )
{
   while ( !ts.eof() )
   {                                 // until end of file...	   
      QString s = ts.readLine();         // line of text excluding '\n'
      int pos = s.find('=');
      if( pos > 0 )                     // seems not to have a tag
      {
         QString key = s.left(pos);
         QString val = s.mid(pos+1);
         m_map[key] = val;
      }
   }
}
/*
void ValueMap::load( const QString& s )
{
   int pos=0;
   while ( pos<(int)s.length() )
   {                                 // until end of file...
      int pos2 = s.find('=', pos);
      int pos3 = s.find('\n', pos2 );
      if (pos3<0)
         pos3=s.length();
      if( pos2 > 0 )                     // seems not to have a tag
      {
         QString key = s.mid(pos, pos2-pos);
         QString val = s.mid(pos2+1, pos3-pos2-1);
         m_map[key] = val;
      }
      pos = pos3;
   }
}
*/

// safeStringJoin and safeStringSplit allow to convert a stringlist into a string and back
// safely, even if the individual strings in the list contain the separator character.
QString safeStringJoin(const QStringList& sl, char sepChar, char metaChar )
{
   // Join the strings in the list, using the separator ','
   // If a string contains the separator character, it will be replaced with "\,".
   // Any occurances of "\" (one backslash) will be replaced with "\\" (2 backslashes)
   
   assert(sepChar!=metaChar);
   
   QString sep;
   sep += sepChar;
   QString meta;
   meta += metaChar;   
   
   QString safeString;
   
   QStringList::const_iterator i;
   for (i=sl.begin(); i!=sl.end(); ++i)
   {
      QString s = *i;
      s.replace(meta, meta+meta);   //  "\" -> "\\"
      s.replace(sep, meta+sep);     //  "," -> "\,"
      if ( i==sl.begin() )
         safeString = s;
      else
         safeString += sep + s;
   }
   return safeString;
}

// Split a string that was joined with safeStringJoin
QStringList safeStringSplit(const QString& s, char sepChar, char metaChar )
{
   assert(sepChar!=metaChar);
   QStringList sl;
   // Miniparser
   int i=0;
   int len=s.length();
   QString b;
   for(i=0;i<len;++i)
   {
      if      ( i+1<len && s[i]==metaChar && s[i+1]==metaChar ){ b+=metaChar; ++i; }
      else if ( i+1<len && s[i]==metaChar && s[i+1]==sepChar ){ b+=sepChar; ++i; }
      else if ( s[i]==sepChar )  // real separator
      {
         sl.push_back(b);
         b="";
      }
      else { b+=s[i]; }
   }
   if ( !b.isEmpty() )
      sl.push_back(b);

   return sl;
}



static QString numStr(int n)
{
   QString s;
   s.setNum( n );
   return s;
}

static QString subSection( const QString& s, int idx, char sep )
{
   int pos=0;
   while( idx>0 )
   {
      pos = s.find( sep, pos );
      --idx;
      if (pos<0) break;
      ++pos;
   }
   if ( pos>=0 )
   {
      int pos2 = s.find( sep, pos );
      if ( pos2>0 )
         return s.mid(pos, pos2-pos);
      else
         return s.mid(pos);
   }

   return "";
}

static int num( QString& s, int idx )
{
   return subSection( s, idx, ',').toInt();
}

void ValueMap::writeEntry(const QString& k, const QFont& v )
{
   m_map[k] = v.family() + "," + QString::number(v.pointSize()) + "," + (v.bold() ? "bold" : "normal");
}

void ValueMap::writeEntry(const QString& k, const QColor& v )
{
   m_map[k] = numStr(v.red()) + "," + numStr(v.green()) + "," + numStr(v.blue());
}

void ValueMap::writeEntry(const QString& k, const QSize& v )
{
   m_map[k] = numStr(v.width()) + "," + numStr(v.height());
}

void ValueMap::writeEntry(const QString& k, const QPoint& v )
{
   m_map[k] = numStr(v.x()) + "," + numStr(v.y());
}

void ValueMap::writeEntry(const QString& k, int v )
{
   m_map[k] = numStr(v);
}

void ValueMap::writeEntry(const QString& k, bool v )
{
   m_map[k] = numStr(v);
}

void ValueMap::writeEntry(const QString& k, const QString& v )
{
   m_map[k] = v;
}

void ValueMap::writeEntry(const QString& k, const char* v )
{
   m_map[k] = v;
}

void ValueMap::writeEntry(const QString& k, const QStringList& v, char separator )
{
   m_map[k] = safeStringJoin(v, separator);
}


QFont ValueMap::readFontEntry(const QString& k, QFont* defaultVal )
{
   QFont f = *defaultVal;
   std::map<QString,QString>::iterator i = m_map.find( k );
   if ( i!=m_map.end() )
   {
      f.setFamily( subSection( i->second, 0, ',' ) );
      f.setPointSize( subSection( i->second, 1, ',' ).toInt() );
      f.setBold( subSection( i->second, 2, ',' )=="bold" );
      //f.fromString(i->second);
   }

   return f;
}

QColor ValueMap::readColorEntry(const QString& k, QColor* defaultVal )
{
   QColor c= *defaultVal;
   std::map<QString,QString>::iterator i = m_map.find( k );
   if ( i!=m_map.end() )
   {
      QString s = i->second;
      c = QColor( num(s,0),num(s,1),num(s,2) );
   }

   return c;
}

QSize ValueMap::readSizeEntry(const QString& k, QSize* defaultVal )
{
   QSize size = defaultVal ? *defaultVal : QSize(600,400);
   std::map<QString,QString>::iterator i = m_map.find( k );
   if ( i!=m_map.end() )
   {

      QString s = i->second;
      size = QSize( num(s,0),num(s,1) );
   }

   return size;
}

QPoint ValueMap::readPointEntry(const QString& k, QPoint* defaultVal)
{
   QPoint point = defaultVal ? *defaultVal : QPoint(0,0);
   std::map<QString,QString>::iterator i = m_map.find( k );
   if ( i!=m_map.end() )
   {
      QString s = i->second;
      point = QPoint( num(s,0),num(s,1) );
   }

   return point;
}

bool ValueMap::readBoolEntry(const QString& k, bool bDefault )
{
   bool b = bDefault;
   std::map<QString,QString>::iterator i = m_map.find( k );
   if ( i!=m_map.end() )
   {
      QString s = i->second;
      b = (bool)num(s,0);
   }

   return b;
}

int ValueMap::readNumEntry(const QString& k, int iDefault )
{
   int ival = iDefault;
   std::map<QString,QString>::iterator i = m_map.find( k );
   if ( i!=m_map.end() )
   {
      QString s = i->second;
      ival = num(s,0);
   }

   return ival;
}

QString ValueMap::readEntry(const QString& k, const QString& sDefault )
{
   QString sval = sDefault;
   std::map<QString,QString>::iterator i = m_map.find( k );
   if ( i!=m_map.end() )
   {
      sval = i->second;
   }

   return sval;
}

QStringList ValueMap::readListEntry(const QString& k, const QStringList& defaultVal, char separator )
{
   QStringList strList;

   std::map<QString,QString>::iterator i = m_map.find( k );
   if ( i!=m_map.end() )
   {
      strList = safeStringSplit( i->second, separator );
      return strList;
   }
   else
      return defaultVal;
}