/*************************************************************************************

    Grid physics library, www.github.com/paboyle/Grid 

    Source file: ./lib/serialisation/TextIO.cc

    Copyright (C) 2015

    Author: Antonin Portelli <antonin.portelli@me.com>
    Author: paboyle <paboyle@ph.ed.ac.uk>
    Author: Guido Cossu<guido.cossu@ed.ac.uk>

    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 Street, Fifth Floor, Boston, MA 02110-1301 USA.

    See the full license in the file "LICENSE" in the top level distribution directory
    *************************************************************************************/
    /*  END LEGAL */
#include <Grid/GridCore.h>

using namespace Grid;
using namespace std;

#define GRID_TEXT_INDENT 2      //number of spaces for indentation of levels


// Writer implementation ///////////////////////////////////////////////////////
TextWriter::TextWriter(const string &fileName)
: file_(fileName, ios::out)
{}

void TextWriter::push(const string &s)
{
  level_++;
};

void TextWriter::pop(void)
{
  level_--;
};

void TextWriter::indent(void)
{
  for (int i = 0; i < level_; ++i)
    for (int t = 0; t < GRID_TEXT_INDENT; t++)
      file_ << ' ';
};

// Reader implementation ///////////////////////////////////////////////////////
TextReader::TextReader(const string &fileName) 
{
    file_.open(fileName, ios::in);
    if (!file_.is_open()) {
        std::cout << GridLogMessage << "TextReader: Error opening file " << fileName << std::endl;
        exit(1);// write better error handling
    } 
}

bool TextReader::push(const string &s)
{
  level_++;
  return true;
};

void TextReader::pop(void)
{
  level_--;
};

void TextReader::checkIndent(void)
{
  char c;
  
  for (int i = 0; i < level_; ++i)
  {
    bool check = true;
    for (int t = 0; t< GRID_TEXT_INDENT; t++){
    file_.get(c);
    check = check && isspace(c);
  }
    if (!check)
    {
      cerr << "TextReader: mismatch on level " << level_ << std::endl;
      exit(1);
    }
  }
}

template <>
void TextReader::readDefault(const std::string &s, std::string &output)
{
    checkIndent();
    output.clear();
    getline(file_, output);
}