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/***************************************************************************
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 *   Copyright (C) November 29, 2008 by Mattias Runge                             *
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 *   mattias@runge.se                                                      *
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 *   cannetmanager.cpp                                            *
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 *                                                                         *
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 *   This program is free software; you can redistribute it and/or modify  *
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 *   it under the terms of the GNU General Public License as published by  *
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 *   the Free Software Foundation; either version 2 of the License, or     *
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 *   (at your option) any later version.                                   *
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 *                                                                         *
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 *   This program is distributed in the hope that it will be useful,       *
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 *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
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 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
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 *   GNU General Public License for more details.                          *
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 *                                                                         *
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 *   You should have received a copy of the GNU General Public License     *
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 *   along with this program; if not, write to the                         *
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 *   Free Software Foundation, Inc.,                                       *
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 *   59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.             *
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 ***************************************************************************/
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#include "canmessage.h"
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#include "cannetmanager.h"
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CanNetManager* CanNetManager::myInstance = NULL;
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CanNetManager& CanNetManager::getInstance()
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{
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	if (myInstance == NULL)
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	{
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		myInstance = new CanNetManager();
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	}
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	return *myInstance;
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}
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void CanNetManager::deleteInstance()
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{
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	if (myInstance != NULL)
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	{
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		delete myInstance;
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		myInstance = NULL;
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	}
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}
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CanNetManager::CanNetManager()
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{
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	CanIdTranslator &translator = CanIdTranslator::getInstance();
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	myChannel = new AsyncSocket();
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}
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CanNetManager::~CanNetManager()
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{
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	CanIdTranslator::deleteInstance();
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	myChannel->stop();
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	delete myChannel;
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}
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void CanNetManager::openChannel()
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{
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	SyslogStream &slog = SyslogStream::getInstance();
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	VirtualMachine &vm = VirtualMachine::getInstance();
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	CanDebug &canDebug = CanDebug::getInstance();
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	string address = Settings::get("CanNetAddress");
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	string port = Settings::get("CanNetPort");
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	myChannel->setAddress(address, stoi(port));
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	myChannel->setReconnectTimeout(10);
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	myChannel->start();
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	myChannel->startEvent();
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	bool waitingForPong = false;
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	while (1)
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	{
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		myChannel->waitForEvent();
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		while (myChannel->availableEvent())
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		{
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			int event = myChannel->getEvent();
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			if (event == ASYNCSOCKET_EVENT_DATA)
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			{
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				while (myChannel->availableData())
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				{
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					waitingForPong = false;
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					string data = myChannel->getData();
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					try
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					{
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						///FIXME: Verify that \n is right here, have seen that it does not always work
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						vector<string> dataLines = explode("\n", data);
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						for (int n = 0; n < dataLines.size(); n++)
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						{
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							data = trim(dataLines[n], '\n');
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							if (data == "PONG")
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							{
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								slog << "Received pong.\n";
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								continue;
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							}
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							CanMessage canMessage;
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							canMessage.setRaw(data);
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							//slog << "Received: " << data;
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							if (!canMessage.isUnknown())
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							{
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								vm.queueCanMessage(canMessage);
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								canDebug.sendCanMessage(canMessage);
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							}
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							else
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							{
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								canDebug.sendData(data + "\n");
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							}
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							/*else
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							{
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								slog << "Received unknown message. Skipping...\n";
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							}*/
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						}
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					}
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					catch (CanMessageException* e)
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					{
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						slog << "CanMessageException was caught:\n";
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						slog << e->getDescription() + "\n";
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					}
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				}
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			}
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			else if (event == ASYNCSOCKET_EVENT_CONNECTED)
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			{
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				slog << "Connected to " + address + ":" + port + "\n";
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			}
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			else if (event == ASYNCSOCKET_EVENT_CLOSED)
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			{
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				vm.queueExpression("setAllOffline();");
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			}
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			else if (event == ASYNCSOCKET_EVENT_DIED)
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			{
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				vm.queueExpression("setAllOffline();");
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				break;
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			}
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			else if (event == ASYNCSOCKET_EVENT_INACTIVITY)
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			{
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				if (waitingForPong)
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				{
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					slog << "We have not received a pong for our ping.\n";
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					waitingForPong = false;
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					vm.queueExpression("setAllOffline();");
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					myChannel->forceReconnect();
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				}
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				else
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				{
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					//slog << "We have not received anything from the canDaemon in some time.\n";
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					waitingForPong = true;
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					slog << "Sending ping.\n";
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					myChannel->sendData("PING");
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				}
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			}
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		}
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	}
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	myChannel->stopEvent();
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}
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void CanNetManager::sendMessage(CanMessage canMessage)
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{
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	CanDebug &canDebug = CanDebug::getInstance();
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	canDebug.sendCanMessage(canMessage);
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	myChannel->sendData(canMessage.getRaw());
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}
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