/*
 * Copyright (c) 2017 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.
 */

#ifndef WIFI_EMULATOR_PROTOCOL_H
#define WIFI_EMULATOR_PROTOCOL_H

#include <string>
#include <map>
#include <set>
#include "query.h"
#include "emulator.h"

#include "websocket-server.h"

enum ProtocolVersion {
  CONTROL_PROTOCOL_V1 = 1, CONTROL_PROTOCOL_V2 = 2
};

typedef struct ProtocolDetails {
  static std::set<std::string> AllowedObjectName;
  static std::set<std::string> AllowedFields;
  static std::set<std::string> AllowedActions;
//  static std::list<std::string> AllowedParameters; // Per action
  static std::set<std::string> AllowedFilters;
  static std::set<std::string> AllowedOperands; // Per filter
} ProtocolDetails;

class CommunicationProtocol {
 public:
  CommunicationProtocol (ProtocolVersion version = ProtocolVersion::CONTROL_PROTOCOL_V1);

  bool checkFilter (const std::vector<std::string> &filter);

  bool checkFields (const std::string &field);

  bool checkObjectName (const std::string &objectName);

  bool checkParameters (const std::string &parameter);

  bool checkAction (const std::string &action);

  std::string evaluateFilters (const std::list<std::vector<std::string>> &filters);

  void
  processQuery (Server *s, websocketpp::connection_hdl hdl, message_ptr msg, ns3::emulator::Emulator &emulator, Query query);

  Query makeReplyQuery (const Query &request, ns3::emulator::Emulator &emulator);

  void
  timerCallback (ns3::emulator::Emulator &emulator, Server *s, websocketpp::connection_hdl hdl, message_ptr msg, Query query, std::shared_ptr<boost::asio::deadline_timer> subscribeTimer);

 private:
  ProtocolVersion version;
};

#endif //WIFI_EMULATOR_PROTOCOL_H