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/*

 *

 *  Copyright (C) 2010  Mattias Runge

 *

 *  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 2 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.,

 *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.

 *

 */

#include "Manager.h"

#include <iostream>

#include <boost/lexical_cast.hpp>

#include <boost/bind.hpp>

#include <boost/cast.hpp>

#include "common/log.h"

static const std::string log_module_ = "net::manager";

namespace atom {

namespace net {

Manager::Pointer Manager::instance_;

Manager::Manager()

{

  LOG_DEBUG_ENTER;

  LOG_DEBUG_EXIT;

}

Manager::~Manager()

{

  LOG_DEBUG_ENTER;

  this->Stop();

  this->clients_.clear();

  LOG_DEBUG_EXIT;

}

Manager::Pointer Manager::Instance()

{

  LOG_DEBUG_ENTER;

  return Manager::instance_;

  LOG_DEBUG_EXIT;

}

void Manager::Create()

{

  LOG_DEBUG_ENTER;

  Manager::instance_ = Manager::Pointer(new Manager());

  LOG_DEBUG_EXIT;

}

void Manager::Delete()

{

  LOG_DEBUG_ENTER;

  Manager::instance_.reset();

  LOG_DEBUG_EXIT;

}

void Manager::ConnectSlots(const SignalOnNewState::slot_type& slot_on_new_state, const SignalOnNewClient::slot_type& slot_on_new_client, const SignalOnNewData::slot_type& slot_on_new_data)

{

  LOG_DEBUG_ENTER;

  this->signal_on_new_state_.connect(slot_on_new_state);

  this->signal_on_new_client_.connect(slot_on_new_client);

  this->signal_on_new_data_.connect(slot_on_new_data);

  LOG_DEBUG_EXIT;

}

void Manager::SlotOnNewState(SocketId client_id, SocketId server_id, ClientState client_state)

{

  LOG_DEBUG_ENTER;

  log::Debug(log_module_, "SlotOnNewState, client_id %d, server_id %d, client_state %d", client_id, server_id, client_state);

  if (client_state == CLIENT_STATE_DISCONNECTED)

  {

    this->clients_.erase(client_id);

  }

  this->signal_on_new_state_(client_id, client_state);

  LOG_DEBUG_EXIT;

}

void Manager::SlotOnNewClient(SocketId server_id, TcpSocketPointer socket)

{

  LOG_DEBUG_ENTER;

  TcpClient::Pointer client = TcpClient::Pointer(new TcpClient(this->io_service_, socket, this->GetFreeSocketId(), server_id));

  client->ConnectSlots(Client::SignalOnNewState::slot_type(&Manager::SlotOnNewState, this, _1, _2, _3).track(Manager::instance_),

                       Client::SignalOnNewData::slot_type(&Manager::SlotOnNewData, this, _1, _2, _3).track(Manager::instance_));

  this->clients_[client->GetId()] = client;

  log::Info(log_module_, "Client connected on server id %d with client id %d!", server_id, client->GetId());

  this->signal_on_new_client_(client->GetId(), server_id);

  this->signal_on_new_state_(client->GetId(), CLIENT_STATE_CONNECTED);

  LOG_DEBUG_EXIT;

}

void Manager::SlotOnNewData(SocketId client_id, SocketId server_id, common::Byteset data)

{

  LOG_DEBUG_ENTER;

  //log::Debug(log_module_, "data=\"%s\"", std::string(data.begin(), data.end()).data());

  this->signal_on_new_data_(client_id, data);

  LOG_DEBUG_EXIT;

}

SocketId Manager::GetFreeSocketId()

{

  LOG_DEBUG_ENTER;

  SocketId id = 1;

  while (this->clients_.find(id) != this->clients_.end() || this->servers_.find(id) != this->servers_.end())

  {

    id++;

  }

  LOG_DEBUG_EXIT;

  return id;

}

SocketId Manager::StartServer(TransportProtocol protocol, unsigned int port)

{

  LOG_DEBUG_ENTER;

  if (protocol != TRANSPORT_PROTOCOL_TCP)

  {

    throw std::runtime_error("Can not start server for the Serial or UDP protocol!");

  }

  TcpServer::Pointer server = TcpServer::Pointer(new TcpServer(this->io_service_, port, this->GetFreeSocketId()));

  server->ConnectSlots(TcpServer::SignalOnNewClient::slot_type(&Manager::SlotOnNewClient, this, _1, _2).track(Manager::instance_));

  server->Accept();

  this->servers_[server->GetId()] = server;

  log::Debug(log_module_, "Started server with id %d!", server->GetId());

  LOG_DEBUG_EXIT;

  return server->GetId();

}

SocketId Manager::Connect(TransportProtocol protocol, std::string address, unsigned int port_or_baud)

{

  LOG_DEBUG_ENTER;

  Client::Pointer client;

  switch (protocol)

  {

    case TRANSPORT_PROTOCOL_TCP:

    {

      client = Client::Pointer(new TcpClient(this->io_service_, this->GetFreeSocketId(), 0));

      break;

    }

    case TRANSPORT_PROTOCOL_UDP:

    {

      client = Client::Pointer(new UdpClient(this->io_service_, this->GetFreeSocketId(), 0));

      break;

    }

    case TRANSPORT_PROTOCOL_SERIAL:

    {

      client = Client::Pointer(new SerialClient(this->io_service_, this->GetFreeSocketId(), 0));

      break;

    }

    default:

    {

      throw std::runtime_error("Invalid protocol specified!");

    }

  }

  client->ConnectSlots(Client::SignalOnNewState::slot_type(&Manager::SlotOnNewState, this, _1, _2, _3).track(Manager::instance_),

                       Client::SignalOnNewData::slot_type(&Manager::SlotOnNewData, this, _1, _2, _3).track(Manager::instance_));

  client->Connect(address, port_or_baud);

  this->clients_[client->GetId()] = client;

  LOG_DEBUG_EXIT;

  return client->GetId();

}

void Manager::SendToAll(SocketId server_id, common::Byteset data)

{

  LOG_DEBUG_ENTER;

  this->io_service_.post(boost::bind(&Manager::SendToAllHandler, this, server_id, data));

  LOG_DEBUG_EXIT;

}

void Manager::SendTo(SocketId client_id, common::Byteset data)

{

  LOG_DEBUG_ENTER;

  log::Debug(log_module_, "SendTo, client_id %d", client_id);

  this->io_service_.post(boost::bind(&Manager::SendToHandler, this, client_id, data));

  LOG_DEBUG_EXIT;

}

void Manager::StopServer(SocketId server_id)

{

  LOG_DEBUG_ENTER;

  this->io_service_.post(boost::bind(&Manager::StopServerHandler, this, server_id));

  LOG_DEBUG_EXIT;

}

void Manager::Disconnect(SocketId client_id)

{

  LOG_DEBUG_ENTER;

  log::Debug(log_module_, "Disconnect, client_id %d", client_id);

  this->io_service_.post(boost::bind(&Manager::DisconnectHandler, this, client_id));

  LOG_DEBUG_EXIT;

}

void Manager::SendToAllHandler(SocketId server_id, common::Byteset data)

{

  LOG_DEBUG_ENTER;

  for (ClientList::iterator it = this->clients_.begin(); it != this->clients_.end(); it++)

  {

    if (it->second->GetServerId() == server_id)

    {

      it->second->Send(data);

    }

  }

  LOG_DEBUG_EXIT;

}

void Manager::SendToHandler(SocketId client_id, common::Byteset data)

{

  LOG_DEBUG_ENTER;

  log::Debug(log_module_, "SendToHandler, client_id %d, data %s", client_id, std::string(data.begin(), data.end()).data());

  ClientList::iterator it = this->clients_.find(client_id);

  if (it != this->clients_.end())

  {

    it->second->Send(data);

  }

  else

  {

    log::Error(log_module_, "Failed to find client %d to send data to!", client_id);

  }

  LOG_DEBUG_EXIT;

}

void Manager::StopServerHandler(SocketId server_id)

{

  LOG_DEBUG_ENTER;

  this->clients_.erase(server_id);

  LOG_DEBUG_EXIT;

}

void Manager::DisconnectHandler(SocketId client_id)

{

  LOG_DEBUG_ENTER;

  log::Debug(log_module_, "DisconnectHandler, client_id %d", client_id);

  ClientList::iterator it = this->clients_.find(client_id);

  if (it != this->clients_.end())

  {

    it->second->Disconnect();

  }

  LOG_DEBUG_EXIT;

}

}; // namespace net

}; // namespace atom