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

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

    myChannel->setReconnectTimeout(10);

    myChannel->start();

    myChannel->startEvent();

    bool waitingForPong = false;

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

        while (myChannel->availableEvent())
        {
            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_CONNECTED)
            {
                slog << "Connected to " + address + ":" + port + "\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());
}