#include <anna/core/tracing/Logger.hpp>
#include <anna/core/tracing/TraceMethod.hpp>
#include <anna/config/defines.hpp>

#include <libxml/parser.h>

#include <anna/xml/DTD.hpp>

using namespace std;
using namespace anna;
using namespace anna::xml;

DTD::~DTD ()
{
   if (a_handle != NULL) {
      xmlFreeDtd (a_handle);
      a_handle = NULL;
   }
}

void DTD::initialize (const char* content)
   noexcept(false)
{
   LOGMETHOD (TraceMethod tf ("anna::xml::DTD", "initialize", ANNA_FILE_LOCATION));

   Guard guard (a_mutex);

   if (a_handle != NULL) {
      xmlFreeDtd (a_handle);
      a_handle = NULL;
   }
      
   a_handle = parse (content);
}

void DTD::validate (_xmlValidCtxt* context, _xmlDoc* document) const 
   noexcept(false)
{
   if (a_handle == NULL)
      throw RuntimeException ("'DTD::inicialize' was not called", ANNA_FILE_LOCATION);

   if (context == NULL)
      throw RuntimeException ("Cannot validate with a NULL context", ANNA_FILE_LOCATION);

   if (document == NULL)
      throw RuntimeException ("Cannot validate a NULL XML document", ANNA_FILE_LOCATION);

   if (xmlValidateDtd (context, document, a_handle) == 0) {
      string msg ("XML Document");
      
      if (document->name) {
         msg += ": ";
         msg += document->name;
      }
      else if (document->URL) {
         msg += ": ";
         msg += (const char*) document->URL;
      }
         
      msg += " | Does not comply the DTD especification ";
      throw RuntimeException (msg, ANNA_FILE_LOCATION);
   }
}