///////////////////////////////////////////////////////////////////////////////////
// Copyright (C) 2020 Edouard Griffiths, F4EXB                                   //
//                                                                               //
// 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 as version 3 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 V3 for more details.                               //
//                                                                               //
// You should have received a copy of the GNU General Public License             //
// along with this program. If not, see <http://www.gnu.org/licenses/>.          //
///////////////////////////////////////////////////////////////////////////////////

#include "channel/channelapi.h"
#include "feature/feature.h"
#include "util/messagequeue.h"
#include "maincore.h"
#include "messagepipescommon.h"
#include "messagepipesgcworker.h"

bool MessagePipesGCWorker::MessagePipesGC::existsProducer(const PipeEndPoint *pipeEndPoint)
{
    // Not overly sure about casting to both types here, but currently safeish as the
    // existing functions only use the pointer address - and I presume these
    // may be pointers to deleted objects anyway?
    return MainCore::instance()->existsChannel((const ChannelAPI *)pipeEndPoint)
        || MainCore::instance()->existsFeature((const Feature *)pipeEndPoint);
}

bool MessagePipesGCWorker::MessagePipesGC::existsConsumer(const Feature *feature)
{
    return MainCore::instance()->existsFeature(feature);
}

void MessagePipesGCWorker::MessagePipesGC::sendMessageToConsumer(
    const MessageQueue *messageQueue,
    MessagePipesCommon::ChannelRegistrationKey channelKey,
    Feature *feature)
{
    MessagePipesCommon::MsgReportChannelDeleted *msg = MessagePipesCommon::MsgReportChannelDeleted::create(
        messageQueue, channelKey);
    feature->getInputMessageQueue()->push(msg);
}

MessagePipesGCWorker::MessagePipesGCWorker() :
    m_running(false)
{}

MessagePipesGCWorker::~MessagePipesGCWorker()
{}

void MessagePipesGCWorker::startWork()
{
    connect(&m_gcTimer, SIGNAL(timeout()), this, SLOT(processGC()));
    m_gcTimer.start(10000); // collect garbage every 10s
    m_running = true;
}

void MessagePipesGCWorker::stopWork()
{
    m_running = false;
    m_gcTimer.stop();
    disconnect(&m_gcTimer, SIGNAL(timeout()), this, SLOT(processGC()));
}

void MessagePipesGCWorker::addMessageQueueToDelete(MessageQueue *messageQueue)
{
    if (messageQueue)
    {
        m_gcTimer.start(10000); // restart GC to make sure deletion is postponed
        m_messagePipesGC.addElementToDelete(messageQueue);
    }
}

void MessagePipesGCWorker::processGC()
{
    // qDebug("MessagePipesGCWorker::processGC");
    m_messagePipesGC.processGC();
}