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/***************************************************************************

 *   Copyright (C) November 29, 2008 by Mattias Runge                             *

 *   mattias@runge.se                                                      *

 *   cannetmanager.cpp                                            *

 *                                                                         *

 *   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.,                                       *

 *   59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.             *

 ***************************************************************************/

#include "canmessage.h"

#include "cannetmanager.h"

CanNetManager* CanNetManager::myInstance = NULL;

CanNetManager& CanNetManager::getInstance()

{

	if (myInstance == NULL)

	{

		myInstance = new CanNetManager();

	}

	return *myInstance;

}

void CanNetManager::deleteInstance()

{

	if (myInstance != NULL)

	{

		delete myInstance;

		myInstance = NULL;

	}

}

CanNetManager::CanNetManager()

{

	CanIdTranslator &translator = CanIdTranslator::getInstance();

	myChannel = new AsyncSocket();

}

CanNetManager::~CanNetManager()

{

	CanIdTranslator::deleteInstance();

	myChannel->stop();

	delete myChannel;

}

void CanNetManager::openChannel()

{

	SyslogStream &slog = SyslogStream::getInstance();

	VirtualMachine &vm = VirtualMachine::getInstance();

	CanDebug &canDebug = CanDebug::getInstance();

	string address = Settings::get("CanNetAddress");

	if (address == "")

	{

		throw new Atom::Exception("CanNetAddress is not defined in the config file, can not start.");

	}

	string port = Settings::get("CanNetPort");

	if (port == "")

	{

		throw new Atom::Exception("CanNetPort is not defined in the config file, can not start.");

	}

	myChannel->setAddress(address);

	myChannel->setPort(stoi(port));

	myChannel->setReconnectTimeout(10);

	myChannel->start();

	myChannel->eventStartListen();

	bool waitingForPong = false;

	vector<string> dataLines;

	string data;

	CanMessage *canMessage = NULL;

	while (1)

	{

		myChannel->eventWait();

		while (myChannel->eventIsAvailable())

		{

			SocketEvent socketEvent = myChannel->eventFetch();

			switch (socketEvent.getType())

			{

				case SocketEvent::TYPE_CONNECTED:

				slog << "Connected to " + myChannel->getAddress() + ":" + itos(myChannel->getPort()) + ".\n";

				break;

				case SocketEvent::TYPE_CONNECTING:

				slog << "Connecting to " + myChannel->getAddress() + ":" + itos(myChannel->getPort()) + ".\n";

				break;

				case SocketEvent::TYPE_CONNECTION_CLOSED:

				slog << "Connection to " + myChannel->getAddress() + ":" + itos(myChannel->getPort()) + " closed.\n";

				vm.queueExpression("setAllOffline();");

				break;

				case SocketEvent::TYPE_CONNECTION_DIED:

				slog << "Connection to " + myChannel->getAddress() + ":" + itos(myChannel->getPort()) + " died :: " + socketEvent.getData() + "\n";

				vm.queueExpression("setAllOffline();");

				break;

				case SocketEvent::TYPE_CONNECTION_RESET:

				slog << "Connection to " + myChannel->getAddress() + ":" + itos(myChannel->getPort()) + " was reset :: " + socketEvent.getData() + "\n";

				vm.queueExpression("setAllOffline();");

				break;

				case SocketEvent::TYPE_CONNECTION_FAILED:

				slog << "Connection to " + myChannel->getAddress() + ":" + itos(myChannel->getPort()) + " failed :: " + socketEvent.getData() + "\n";

				vm.queueExpression("setAllOffline();");

				break;

				case SocketEvent::TYPE_DATA:

				waitingForPong = false;

				try

				{

					dataLines = explode("\n", socketEvent.getData());

					for (int n = 0; n < dataLines.size(); n++)

					{

						data = trim(dataLines[n], '\n');

						if (data == "PONG")

						{

							slog << "Received pong.\n";

							continue;

						}

						canMessage = new CanMessage(data);

						if (!canMessage->isUnknown())

						{

							vm.queueCanMessage(*canMessage);

							canDebug.sendCanMessage(*canMessage);

						}

						else

						{

							canDebug.sendData(data + "\n");

						}

						delete canMessage;

						canMessage = NULL;

					}

				}

				catch (CanMessageException* e)

				{

					if (canMessage != NULL)

					{

						delete canMessage;

					}

					slog << "CanMessageException was caught:\n";

					slog << e->getDescription() + "\n";

				}

				break;

				case SocketEvent::TYPE_INACTIVITY:

				if (waitingForPong)

				{

					slog << "We have not received a pong for our ping.\n";

					waitingForPong = false;

					vm.queueExpression("setAllOffline();");

					myChannel->forceReconnect();

				}

				else

				{

					//slog << "We have not received anything from the canDaemon in some time.\n";

					waitingForPong = true;

					slog << "Sending ping.\n";

					myChannel->sendData("PING");

				}

				break;

				case SocketEvent::TYPE_WAITING_RECONNECT:

				slog << "Will try to reconnect to " + myChannel->getAddress() + ":" + itos(myChannel->getPort()) + " in " + itos(myChannel->getReconnectTimeout()) + " seconds.\n";

				break;

			}

		}

	}

	myChannel->eventStopListen();

}

void CanNetManager::sendMessage(CanMessage canMessage)

{

	CanDebug &canDebug = CanDebug::getInstance();

	canDebug.sendCanMessage(canMessage);

	myChannel->sendData(canMessage.getRaw());

}