#include "V8Document.h"
#include "V8XPathResult.h"

namespace Arabica {
namespace DOM {

  
v8::Handle<v8::Value> V8Document::evaluateCustomCallback(const v8::Arguments& args) {
  if (args.Length() < 1)
      throw V8Exception("Wrong number of arguments in evaluate");
//  if (!((V8Node::hasInstance(args[1])) && (V8XPathResult::hasInstance(args[3]))))
//    throw V8Exception("Parameter mismatch while calling evaluate");

  v8::Local<v8::Object> self = args.Holder();
  V8DocumentPrivate* privData = V8DOM::toClassPtr<V8DocumentPrivate >(self->GetInternalField(0));

  v8::String::AsciiValue localExpression(args[0]);
  
  XPath::XPathValue<std::string>* retVal;
  if (args.Length() > 1) {
    Arabica::DOM::Node<std::string>* localContextNode = V8DOM::toClassPtr<Arabica::DOM::Node<std::string> >(args[1]->ToObject()->GetInternalField(0));
   retVal = new XPath::XPathValue<std::string>(privData->dom->xpath->evaluate(*localExpression, *localContextNode));
  } else {
    retVal = new XPath::XPathValue<std::string>(privData->dom->xpath->evaluate(*localExpression, *privData->arabicaThis));
  }
  
  v8::Handle<v8::Function> retCtor = V8XPathResult::getTmpl()->GetFunction();
  v8::Persistent<v8::Object> retObj = v8::Persistent<v8::Object>::New(retCtor->NewInstance());

  V8XPathResult::V8XPathResultPrivate* retPrivData = new V8XPathResult::V8XPathResultPrivate();
  retPrivData->dom = privData->dom;
  retPrivData->arabicaThis = retVal;
  
  retObj->SetInternalField(0, V8DOM::toExternal(retPrivData));

  retObj.MakeWeak(0, V8XPathResult::jsDestructor);
  return retObj;

}

}
}