// Copyright Joyent, Inc. and other Node contributors.
//
// Permission is hereby granted, free of charge, to any person obtaining a
// copy of this software and associated documentation files (the
// "Software"), to deal in the Software without restriction, including
// without limitation the rights to use, copy, modify, merge, publish,
// distribute, sublicense, and/or sell copies of the Software, and to permit
// persons to whom the Software is furnished to do so, subject to the
// following conditions:
//
// The above copyright notice and this permission notice shall be included
// in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
// USE OR OTHER DEALINGS IN THE SOFTWARE.

#ifndef REQ_WRAP_H_
#define REQ_WRAP_H_

#include "queue.h"
#include "node_internals.h"

namespace node {

// defined in node.cc
extern Cached<v8::String> process_symbol;
extern Cached<v8::String> domain_symbol;
extern QUEUE req_wrap_queue;

template <typename T>
class ReqWrap {
public:
  ReqWrap() {
    v8::HandleScope scope(node_isolate);
    v8::Local<v8::Object> object = v8::Object::New();
    persistent().Reset(node_isolate, object);

    if (using_domains) {
      v8::Local<v8::Value> domain = v8::Context::GetCurrent()
                                    ->Global()
                                    ->Get(process_symbol)
                                    ->ToObject()
                                    ->Get(domain_symbol);

      if (!domain->IsUndefined()) {
        object->Set(domain_symbol, domain);
      }
    }

    QUEUE_INSERT_TAIL(&req_wrap_queue, &req_wrap_queue_);
  }


  ~ReqWrap() {
    QUEUE_REMOVE(&req_wrap_queue_);
    // Assert that someone has called Dispatched()
    assert(req_.data == this);
    assert(!persistent().IsEmpty());
    persistent().Dispose();
  }

  // Call this after the req has been dispatched.
  void Dispatched() {
    req_.data = this;
  }

  inline v8::Local<v8::Object> object() {
    return v8::Local<v8::Object>::New(node_isolate, persistent());
  }

  inline v8::Persistent<v8::Object>& persistent() {
    return object_;
  }

  v8::Persistent<v8::Object> object_;
  QUEUE req_wrap_queue_;
  void* data_;
  T req_; // *must* be last, GetActiveRequests() in node.cc depends on it
};


}  // namespace node


#endif  // REQ_WRAP_H_