/*
 *
 * (C) 2013-23 - ntop.org
 *
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software Foundation,
 * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
 *
 */

#ifndef _ZMQ_PARSER_INTERFACE_H_
#define _ZMQ_PARSER_INTERFACE_H_

#include "ntop_includes.h"

class ZMQParserInterface : public ParserInterface {
 private:
  typedef std::pair<u_int32_t, u_int32_t> pen_value_t;
  typedef std::map<string, pen_value_t> labels_map_t;
  typedef std::map<pen_value_t, string> descriptions_map_t;
  typedef std::map<string, u_int32_t> counters_map_t;
  std::unordered_map<u_int32_t, bool> cloud_flow_exporters;
  u_int16_t top_vlan_id;
  std::unordered_map<std::string, u_int16_t> name_to_vlan;
  labels_map_t labels_map; /* Contains mappings between labels and integer IDs
                              (PEN and ID) */
  counters_map_t counters_map; /* Contains mappings between sFlow counter field
                                  labels and integer IDs */
  descriptions_map_t descriptions_map; /* Contains mappings between integer IDs
                                          and descriptions */
  u_int32_t polling_start_time;
  bool once, is_sampled_traffic;
  u_int32_t flow_max_idle, returned_flow_max_idle;
  u_int64_t zmq_initial_bytes, zmq_initial_pkts,
      zmq_remote_initial_exported_flows;
  std::map<u_int32_t, ZMQ_RemoteStats *> source_id_last_zmq_remote_stats;
  ZMQ_RemoteStats *zmq_remote_stats, *zmq_remote_stats_shadow;
  u_int32_t remote_lifetime_timeout, remote_idle_timeout;
  struct timeval last_zmq_remote_stats_update;
  RwLock lock;
#ifdef NTOPNG_PRO
  CustomAppMaps *custom_app_maps;
#endif

  void loadVLANMappings();
  u_int16_t findVLANMapping(std::string name);
  
  bool preprocessFlow(ParsedFlow *flow);
  void addMapping(const char *sym, u_int32_t num, u_int32_t pen = 0,
                  const char *descr = NULL);
  void addCounterMapping(const char *sym, u_int32_t id);
  bool parsePENZeroField(ParsedFlow *const flow, u_int32_t field,
                         ParsedValue *value);
  bool parsePENNtopField(ParsedFlow *const flow, u_int32_t field,
                         ParsedValue *value);
  bool matchPENZeroField(ParsedFlow *const flow, u_int32_t field,
                         ParsedValue *value);
  bool matchPENNtopField(ParsedFlow *const flow, u_int32_t field,
                         ParsedValue *value);
  static bool parseContainerInfo(json_object *jo,
                                 ContainerInfo *const container_info);
  static void freeContainerInfo(ContainerInfo *const container_info);
  bool parseNProbeAgentField(ParsedFlow *const flow, const char *key,
                             ParsedValue *value,
                             json_object *const jvalue);
  int parseSingleJSONFlow(json_object *o, u_int32_t source_id);
  int parseSingleTLVFlow(ndpi_deserializer *deserializer, u_int32_t source_id);
  void setFieldMap(const ZMQ_FieldMap *const field_map) const;
  void setFieldValueMap(const ZMQ_FieldValueMap *const field_value_map) const;

  u_int8_t parseOptionFieldMap(json_object *const jo);
  u_int8_t parseOptionFieldValueMap(json_object *const jo);

 protected:
  struct {
    u_int32_t num_flows,   /* flows processed */
        num_dropped_flows, /* flows unhandles (received but no room in the flow
                              hash) */
        num_events, num_counters, num_hello, num_listening_ports, num_templates,
        num_options, num_network_events, num_snmp_interfaces, zmq_msg_rcvd,
        zmq_msg_drops;
  } recvStats, recvStatsCheckpoint;
  inline void updateFlowMaxIdle() {
    returned_flow_max_idle = max(remote_idle_timeout, flow_max_idle);
  }

 public:
  ZMQParserInterface(const char *endpoint,
                     const char *custom_interface_type = NULL);
  ~ZMQParserInterface();

  virtual InterfaceType getIfType() const { return (interface_type_ZMQ); }
  virtual bool isSampledTraffic() const { return (is_sampled_traffic); }

  bool getKeyId(char *sym, u_int32_t sym_len, u_int32_t *const pen,
                u_int32_t *const field) const;
  const char *getKeyDescription(u_int32_t pen, u_int32_t field) const;
  bool matchField(ParsedFlow *const flow, const char *key, ParsedValue *value);

  bool getCounterId(char *sym, u_int32_t sym_len, u_int32_t *id) const;

  u_int8_t parseJSONFlow(const char *payload, int payload_size,
                         u_int32_t source_id, u_int32_t msg_id);
  u_int8_t parseTLVFlow(const char *payload, int payload_size,
                        u_int32_t source_id, u_int32_t msg_id, void *data);
  u_int8_t parseEvent(const char *payload, int payload_size, u_int32_t source_id,
                      u_int32_t msg_id, void *data);
  u_int8_t parseTLVCounter(const char *payload, int payload_size);
  u_int8_t parseJSONCounter(const char *payload, int payload_size);
  u_int8_t parseTemplate(const char *payload, int payload_size,
                         u_int32_t source_id, u_int32_t msg_id, void *data);
  u_int8_t parseOption(const char *payload, int payload_size,
                       u_int32_t source_id, u_int32_t msg_id, void *data);
  u_int8_t parseListeningPorts(const char *payload, int payload_size,
                               u_int32_t source_id, u_int32_t msg_id,
                               void *data);
  u_int8_t parseSNMPIntefaces(const char *payload, int payload_size,
                              u_int32_t source_id, u_int32_t msg_id, void *data);

  u_int32_t periodicStatsUpdateFrequency() const;
  virtual void setRemoteStats(ZMQ_RemoteStats *zrs);
#ifdef NTOPNG_PRO
  virtual bool getCustomAppDetails(u_int32_t remapped_app_id,
                                   u_int32_t *const pen,
                                   u_int32_t *const app_field,
                                   u_int32_t *const app_id);
#endif
  u_int32_t getNumDroppedPackets() {
    return zmq_remote_stats ? zmq_remote_stats->sflow_pkt_sample_drops : 0;
  };
  virtual void lua(lua_State *vm);
  inline u_int32_t getFlowMaxIdle() { return (returned_flow_max_idle); }
};

#endif /* _ZMQ_PARSER_INTERFACE_H_ */
