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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();
    delete myChannel;
}

void CanNetManager::openChannel()
{
    SyslogStream &slog = SyslogStream::getInstance();
    VirtualMachine &vm = VirtualMachine::getInstance();
    CanDebug &canDebug = CanDebug::getInstance();

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

    myChannel->setAddress(address, stoi(port));

    myChannel->setReconnectTimeout(10);

    myChannel->start();

    myChannel->startEvent();

    bool waitingForPong = false;

    while (1)
    {
        myChannel->waitForEvent();

        int event = myChannel->getEvent();

        if (event == ASYNCSOCKET_EVENT_DATA)
        {
            while (myChannel->availableData())
            {
                waitingForPong = false;

                string data = myChannel->getData();

                try
                {
                    ///FIXME: Verify that \n is right here, have seen that it does not always work
                    vector<string> dataLines = explode("\n", data);

                    for (int n = 0; n < dataLines.size(); n++)
                    {
                        data = trim(dataLines[n], '\n');

                        if (data == "PONG")
                        {
                            slog << "Received pong.\n";
                            continue;
                        }

                        CanMessage canMessage;
                        canMessage.setRaw(data);

                        //slog << "Received: " << data;

                        if (!canMessage.isUnknown())
                        {
                            vm.queueCanMessage(canMessage);
                            canDebug.sendCanMessage(canMessage);
                        }
                        else
                        {
                            canDebug.sendData(data + "\n");
                        }
                        /*else
                        {
                            slog << "Received unknown message. Skipping...\n";
                        }*/
                    }
                }
                catch (CanMessageException* e)
                {
                    slog << "CanMessageException was caught:\n";
                    slog << e->getDescription() + "\n";
                }
            }
        }
        else if (event == ASYNCSOCKET_EVENT_CLOSED)
        {
            vm.queueExpression("setAllOffline();");
        }
        else if (event == ASYNCSOCKET_EVENT_DIED)
        {
            vm.queueExpression("setAllOffline();");
            break;
        }
        else if (event == ASYNCSOCKET_EVENT_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");
            }

        }
    }

    myChannel->stopEvent();
}

void CanNetManager::sendMessage(CanMessage canMessage)
{
    CanDebug &canDebug = CanDebug::getInstance();
    canDebug.sendCanMessage(canMessage);
    myChannel->sendData(canMessage.getRaw());
}