/*
 * 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.
 */

#include "vom/arp_proxy_config.hpp"
#include "vom/arp_proxy_config_cmds.hpp"
#include "vom/prefix.hpp"
#include "vom/singular_db_funcs.hpp"

namespace VOM {
singular_db<arp_proxy_config::key_t, arp_proxy_config> arp_proxy_config::m_db;

arp_proxy_config::event_handler arp_proxy_config::m_evh;

arp_proxy_config::arp_proxy_config(const boost::asio::ip::address_v4& low,
                                   const boost::asio::ip::address_v4& high)
  : m_low(low)
  , m_high(high)
  , m_config(true)
{
}

arp_proxy_config::arp_proxy_config(const arp_proxy_config& o)
  : m_low(o.m_low)
  , m_high(o.m_high)
  , m_config(o.m_config)
{
}

arp_proxy_config::~arp_proxy_config()
{
  sweep();

  // not in the DB anymore.
  m_db.release(std::make_pair(m_low, m_high), this);
}

void
arp_proxy_config::sweep()
{
  if (m_config) {
    HW::enqueue(
      new arp_proxy_config_cmds::unconfig_cmd(m_config, m_low, m_high));
  }
  HW::write();
}

void
arp_proxy_config::dump(std::ostream& os)
{
  db_dump(m_db, os);
}

void
arp_proxy_config::replay()
{
  if (m_config) {
    HW::enqueue(new arp_proxy_config_cmds::config_cmd(m_config, m_low, m_high));
  }
}

std::string
arp_proxy_config::to_string() const
{
  std::ostringstream s;
  s << "ARP-proxy:"
    << " low:" << m_low.to_string() << " high:" << m_high.to_string();

  return (s.str());
}

void
arp_proxy_config::update(const arp_proxy_config& desired)
{
  if (!m_config) {
    HW::enqueue(new arp_proxy_config_cmds::config_cmd(m_config, m_low, m_high));
  }
}

std::shared_ptr<arp_proxy_config>
arp_proxy_config::find_or_add(const arp_proxy_config& temp)
{
  return (m_db.find_or_add(std::make_pair(temp.m_low, temp.m_high), temp));
}

std::shared_ptr<arp_proxy_config>
arp_proxy_config::singular() const
{
  return find_or_add(*this);
}

arp_proxy_config::event_handler::event_handler()
{
  OM::register_listener(this);
  inspect::register_handler({ "arp-proxy-config" }, "ARP Proxy configurations",
                            this);
}

void
arp_proxy_config::event_handler::handle_replay()
{
  m_db.replay();
}

void
arp_proxy_config::event_handler::handle_populate(const client_db::key_t& key)
{
  std::shared_ptr<arp_proxy_config_cmds::dump_cmd> cmd =
    std::make_shared<arp_proxy_config_cmds::dump_cmd>();

  HW::enqueue(cmd);
  HW::write();

  for (auto& record : *cmd) {
    auto& payload = record.get_payload();

    boost::asio::ip::address lo = from_bytes(0, payload.proxy.low_address);
    boost::asio::ip::address hi = from_bytes(0, payload.proxy.hi_address);

    arp_proxy_config ap(lo.to_v4(), hi.to_v4());
    OM::commit(key, ap);
  }
}

dependency_t
arp_proxy_config::event_handler::order() const
{
  return (dependency_t::GLOBAL);
}

void
arp_proxy_config::event_handler::show(std::ostream& os)
{
  db_dump(m_db, os);
}

std::ostream&
operator<<(std::ostream& os, const arp_proxy_config::key_t& key)
{
  os << "[" << key.first << ", " << key.second << "]";

  return (os);
}
}
/*
 * fd.io coding-style-patch-verification: ON
 *
 * Local Variables:
 * eval: (c-set-style "mozilla")
 * End:
 */