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/*
 * Copyright (c) 2017-2019 Cisco and/or its affiliates.
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at:
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

#pragma once

#include <hicn/transport/interfaces/callbacks.h>
#include <hicn/transport/interfaces/verification_policy.h>

#include <hicn/transport/core/content_object.h>

#include <protocols/errors.h>

#include <queue>

namespace transport {

namespace interface {
class ConsumerSocket;
}

namespace protocol {

using Packet = core::Packet;
using interface::VerificationPolicy;
using ContentObjectPtr = std::shared_ptr<core::ContentObject>;

class VerificationManager {
 public:
  virtual ~VerificationManager() = default;
  virtual VerificationPolicy onPacketToVerify(const Packet& packet) = 0;
  virtual bool onKeyToVerify() { return false; }
};

class SignatureVerificationManager : public VerificationManager {
 public:
  SignatureVerificationManager(implementation::ConsumerSocket* icn_socket)
      : icn_socket_(icn_socket), key_packets_() {}

  interface::VerificationPolicy onPacketToVerify(const Packet& packet) override;
  bool onKeyToVerify() override;

 private:
  implementation::ConsumerSocket* icn_socket_;
  std::queue<ContentObjectPtr> key_packets_;

  ContentObjectPtr copyPacket(const Packet& packet) {
    std::shared_ptr<utils::MemBuf> packet_copy =
        packet.acquireMemBufReference();
    ContentObjectPtr content_object_copy =
        std::make_shared<core::ContentObject>(std::move(packet_copy));
    std::unique_ptr<utils::MemBuf> payload_copy = packet.getPayload();
    content_object_copy->appendPayload(std::move(payload_copy));
    return content_object_copy;
  }
};

}  // end namespace protocol

}  // end namespace transport