/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/***************************************************************************
 *            queryparser.cc
 *
 *  Tue May  6 17:02:37 CEST 2008
 *  Copyright 2008 Bent Bisballe Nyeng
 *  deva@aasimon.org
 ****************************************************************************/

/*
 *  This file is part of Pracro.
 *
 *  Pracro 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.
 *
 *  Pracro 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 Pracro; if not, write to the Free Software
 *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA.
 */
#include "queryparser.h"

QueryParser::QueryParser(std::string document)
{
  this->document = document;
  this->timestamp = 0;

  // Make sure we always contain a valid xml document.
  if(this->document == "") this->document = "<xml></xml>";
  
  p = 0;
  stack.push_back(&result);
}

void QueryParser::startTag(std::string name, std::map< std::string, std::string> attributes)
{

  if(name == "results") {
    // What to do here!?
  }

  if(name == "result") {
    this->timestamp = atol(attributes["timestamp"].c_str());

    QueryResult q;
    q.timestamp = this->timestamp;
    stack.back()->groups[attributes["class"]] = q;
    stack.push_back(&stack.back()->groups[attributes["class"]]);
  }

  if(name == "group") {
    QueryResult q;
    q.timestamp = this->timestamp;
    stack.back()->groups[attributes["name"]] = q;
    stack.push_back(&stack.back()->groups[attributes["name"]]);
  }

  if(name == "value") {
    stack.back()->values[attributes["name"]] = attributes["value"];
  }

}

void QueryParser::endTag(std::string name)
{
  if(name == "group") stack.pop_back();
}

// FIXME: This is *not* the optimal way to do this.
int QueryParser::readData(char *data, size_t size)
{
  size_t len = document.size() - p < size ? document.size() - p : size;
  strncpy(data, document.c_str() + p, len);
  p += len;
  return len;
}

void QueryParser::parseError(char *buf, size_t len, std::string error, int lineno)
{
  fprintf(stderr, "QueryParser error at line %d: %s\n", lineno, error.c_str());
  fprintf(stderr, "\tBuffer %u bytes: [", len);
  if(fwrite(buf, len, 1, stderr) != len) {}
  fprintf(stderr, "]\n");
  fflush(stderr);
}

#ifdef TEST_QUERYPARSER

#include "queryhandler.h"

static std::string loadresultstring(QueryResult &res, std::string group = "")
{
  std::string s;

  std::map< std::string, std::string >::iterator v = res.values.begin();
  while(v != res.values.end()) {
    s += group + (*v).first + " = \"" + (*v).second + "\"\n";
    v++;
  }

  std::map< std::string, QueryResult >::iterator g = res.groups.begin();
  while(g != res.groups.end()) {
    s += group + (*g).first + " = {}\n";
    s += loadresultstring((*g).second, group + (*g).first + ".");
    g++;
  }

  return s;
}

int main()
{
  TCPSocket s;
  s.connect("localhost", 11108);

  QueryHandler qh(&s, "2003791613");

  Query q1;
  q1.attributes["device_id"] = "lensmeter";
  q1.attributes["device_type"] = "lensmeter";

  std::string res = qh.exec();
  
  printf("%s\n", res.c_str());

  QueryParser e(res);
  e.parse();

  printf("%s\n", loadresultstring(e.result).c_str());

  return 0;
}

#endif