// 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 SRC_TCP_WRAP_H_
#define SRC_TCP_WRAP_H_

#if defined(NODE_WANT_INTERNALS) && NODE_WANT_INTERNALS

#include "async_wrap.h"
#include "connection_wrap.h"
#include "node_messaging.h"

namespace node {

class ExternalReferenceRegistry;
class Environment;

class TCPWrap : public ConnectionWrap<TCPWrap, uv_tcp_t> {
 public:
  enum SocketType {
    SOCKET,
    SERVER
  };

  static v8::MaybeLocal<v8::Object> Instantiate(Environment* env,
                                                AsyncWrap* parent,
                                                SocketType type);
  static void Initialize(v8::Local<v8::Object> target,
                         v8::Local<v8::Value> unused,
                         v8::Local<v8::Context> context,
                         void* priv);
  static void RegisterExternalReferences(ExternalReferenceRegistry* registry);

  SET_NO_MEMORY_INFO()
  SET_SELF_SIZE(TCPWrap)
  const char* MemoryInfoName() const override {
    switch (provider_type()) {
      case ProviderType::PROVIDER_TCPWRAP:
        return "TCPSocketWrap";
      case ProviderType::PROVIDER_TCPSERVERWRAP:
        return "TCPServerWrap";
      default:
        UNREACHABLE();
    }
  }

  // Transfer the underlying socket to another thread via .postMessage(). The
  // transfer duplicates the socket and re-adopts it (uv_tcp_open) in the
  // receiving event loop. This is the building block for distributing
  // listening sockets and accepted connections across worker_threads.
  BaseObject::TransferMode GetTransferMode() const override;
  std::unique_ptr<worker::TransferData> TransferForMessaging() override;

 private:
  typedef uv_tcp_t HandleType;

  class TransferData : public worker::TransferData {
   public:
    explicit TransferData(uv_os_sock_t socket, SocketType type)
        : socket_(socket), type_(type) {}
    ~TransferData() override;

    BaseObjectPtr<BaseObject> Deserialize(
        Environment* env,
        v8::Local<v8::Context> context,
        std::unique_ptr<worker::TransferData> self) override;

    SET_NO_MEMORY_INFO()
    SET_MEMORY_INFO_NAME(TCPWrapTransferData)
    SET_SELF_SIZE(TransferData)

   private:
    uv_os_sock_t socket_;
    SocketType type_;
  };

  template <typename T,
            int (*F)(const typename T::HandleType*, sockaddr*, int*)>
  friend void GetSockOrPeerName(const v8::FunctionCallbackInfo<v8::Value>&);

  TCPWrap(Environment* env, v8::Local<v8::Object> object,
          ProviderType provider);

  static void New(const v8::FunctionCallbackInfo<v8::Value>& args);
  static void SetNoDelay(const v8::FunctionCallbackInfo<v8::Value>& args);
  static void SetKeepAlive(const v8::FunctionCallbackInfo<v8::Value>& args);
  static void SetTypeOfService(const v8::FunctionCallbackInfo<v8::Value>& args);
  static void GetTypeOfService(const v8::FunctionCallbackInfo<v8::Value>& args);
  static void Bind(const v8::FunctionCallbackInfo<v8::Value>& args);
  static void Bind6(const v8::FunctionCallbackInfo<v8::Value>& args);
  static void Listen(const v8::FunctionCallbackInfo<v8::Value>& args);
  static void Connect(const v8::FunctionCallbackInfo<v8::Value>& args);
  static void Connect6(const v8::FunctionCallbackInfo<v8::Value>& args);
  template <typename T>
  static void Connect(const v8::FunctionCallbackInfo<v8::Value>& args,
                      int (*uv_ip_addr)(const char* ip_address,
                                        int port,
                                        T* addr));
  static void Open(const v8::FunctionCallbackInfo<v8::Value>& args);
  template <typename T>
  static void Bind(const v8::FunctionCallbackInfo<v8::Value>& args,
                   int family,
                   int (*uv_ip_addr)(const char* ip_address,
                                     int port,
                                     T* addr));
  static void Reset(const v8::FunctionCallbackInfo<v8::Value>& args);
  int Reset(v8::Local<v8::Value> close_callback = v8::Local<v8::Value>());

#ifdef _WIN32
  static void SetSimultaneousAccepts(
      const v8::FunctionCallbackInfo<v8::Value>& args);
#endif
};


}  // namespace node

#endif  // defined(NODE_WANT_INTERNALS) && NODE_WANT_INTERNALS

#endif  // SRC_TCP_WRAP_H_