#pragma once

#include <llarp/path/pathset.hpp>
#include <llarp/routing/path_transfer_message.hpp>
#include "intro.hpp"
#include "protocol.hpp"
#include <llarp/util/buffer.hpp>
#include <llarp/util/types.hpp>
#include <llarp/util/thread/queue.hpp>

#include <deque>

namespace llarp
{
  namespace service
  {
    struct ServiceInfo;
    struct Endpoint;
    struct Introduction;

    struct SendContext
    {
      SendContext(ServiceInfo ident, const Introduction& intro, path::PathSet* send, Endpoint* ep);

      void
      AsyncEncryptAndSendTo(const llarp_buffer_t& payload, ProtocolType t);

      /// queue send a fully encrypted hidden service frame
      /// via a path
      bool
      Send(std::shared_ptr<ProtocolFrame> f, path::Path_ptr path);

      /// flush upstream traffic when in router thread
      void
      FlushUpstream();

      SharedSecret sharedKey;
      ServiceInfo remoteIdent;
      Introduction remoteIntro;
      ConvoTag currentConvoTag;
      path::PathSet* const m_PathSet;
      IDataHandler* const m_DataHandler;
      Endpoint* const m_Endpoint;
      uint64_t sequenceNo = 0;
      llarp_time_t lastGoodSend = 0s;
      const llarp_time_t createdAt;
      llarp_time_t sendTimeout = path::build_timeout;
      llarp_time_t connectTimeout = path::build_timeout * 2;
      llarp_time_t shiftTimeout = (path::build_timeout * 5) / 2;
      llarp_time_t estimatedRTT = 0s;
      bool markedBad = false;
      using Msg_ptr = std::shared_ptr<routing::PathTransferMessage>;
      using SendEvent_t = std::pair<Msg_ptr, path::Path_ptr>;

      thread::Queue<SendEvent_t> m_SendQueue;

      std::function<void(AuthResult)> authResultListener;

      virtual bool
      ShiftIntroduction(bool rebuild = true)
      {
        (void)rebuild;
        return true;
      }

      virtual void
      ShiftIntroRouter(const RouterID) = 0;

      virtual void
      UpdateIntroSet() = 0;

      virtual void
      MarkCurrentIntroBad(llarp_time_t now) = 0;

      void
      AsyncSendAuth(std::function<void(AuthResult)> replyHandler);

     private:
      virtual bool
      IntroGenerated() const = 0;
      virtual bool
      IntroSent() const = 0;

      void
      EncryptAndSendTo(const llarp_buffer_t& payload, ProtocolType t);

      virtual void
      AsyncGenIntro(const llarp_buffer_t& payload, ProtocolType t) = 0;
    };
  }  // namespace service
}  // namespace llarp