///////////////////////////////////////////////////////////////////////////////////
// Copyright (C) 2022 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 <QDebug>
#include <QNetworkAccessManager>
#include <QNetworkReply>
#include <QBuffer>

#include "SWGFeatureSettings.h"
#include "SWGFeatureActions.h"
#include "SWGDeviceState.h"

#include "dsp/dspcommands.h"
#include "dsp/dspengine.h"
#include "dsp/dspdevicesourceengine.h"
#include "dsp/dspdevicesinkengine.h"
#include "dsp/devicesamplesource.h"
#include "dsp/devicesamplesink.h"
#include "device/deviceset.h"
#include "channel/channelapi.h"
#include "device/deviceapi.h"
#include "commands/commandkeyreceiver.h"
#include "settings/serializable.h"
#include "maincore.h"

#include "jogdialcontroller.h"

MESSAGE_CLASS_DEFINITION(JogdialController::MsgConfigureJogdialController, Message)
MESSAGE_CLASS_DEFINITION(JogdialController::MsgStartStop, Message)
MESSAGE_CLASS_DEFINITION(JogdialController::MsgRefreshChannels, Message)
MESSAGE_CLASS_DEFINITION(JogdialController::MsgReportChannels, Message)
MESSAGE_CLASS_DEFINITION(JogdialController::MsgReportControl, Message)
MESSAGE_CLASS_DEFINITION(JogdialController::MsgSelectChannel, Message)

const char* const JogdialController::m_featureIdURI = "sdrangel.feature.jogdialcontroller";
const char* const JogdialController::m_featureId = "JogdialController";

JogdialController::JogdialController(WebAPIAdapterInterface *webAPIAdapterInterface) :
    Feature(m_featureIdURI, webAPIAdapterInterface),
    m_selectedDevice(nullptr),
    m_selectedChannel(nullptr),
    m_selectedIndex(-1),
    m_deviceElseChannelControl(true),
    m_multiplier(1)
{
    qDebug("JogdialController::JogdialController: webAPIAdapterInterface: %p", webAPIAdapterInterface);
    setObjectName(m_featureId);
    m_state = StIdle;
    m_errorMessage = "JogdialController error";
    m_networkManager = new QNetworkAccessManager();
    QObject::connect(
        m_networkManager,
        &QNetworkAccessManager::finished,
        this,
        &JogdialController::networkManagerFinished
    );
    connect(&m_repeatTimer, SIGNAL(timeout()), this, SLOT(handleRepeat()));
}

JogdialController::~JogdialController()
{
    QObject::disconnect(
        m_networkManager,
        &QNetworkAccessManager::finished,
        this,
        &JogdialController::networkManagerFinished
    );
    delete m_networkManager;
}

void JogdialController::start()
{
	qDebug("JogdialController::start");
    m_state = StRunning;
}

void JogdialController::stop()
{
    qDebug("JogdialController::stop");
    m_state = StIdle;
}

bool JogdialController::handleMessage(const Message& cmd)
{
	if (MsgConfigureJogdialController::match(cmd))
	{
        MsgConfigureJogdialController& cfg = (MsgConfigureJogdialController&) cmd;
        qDebug() << "JogdialController::handleMessage: MsgConfigureJogdialController";
        applySettings(cfg.getSettings(), cfg.getForce());

		return true;
	}
    else if (MsgStartStop::match(cmd))
    {
        MsgStartStop& cfg = (MsgStartStop&) cmd;
        qDebug() << "JogdialController::handleMessage: MsgStartStop: start:" << cfg.getStartStop();

        if (cfg.getStartStop()) {
            start();
        } else {
            stop();
        }

        return true;
    }
    else if (MsgRefreshChannels::match(cmd))
    {
        qDebug() << "JogdialController::handleMessage: MsgRefreshChannels";
        updateChannels();
        return true;
    }
    else if (MsgSelectChannel::match(cmd))
    {
        MsgSelectChannel& cfg = (MsgSelectChannel&) cmd;
        int index = cfg.getIndex();

        if ((index >= 0) && (index < m_availableChannels.size()))
        {
            DeviceAPI *selectedDevice = m_availableChannels[cfg.getIndex()].m_deviceAPI;
            ChannelAPI *selectedChannel = m_availableChannels[cfg.getIndex()].m_channelAPI;
            qDebug() << "JogdialController::handleMessage: MsgSelectChannel"
                << "device:" << selectedDevice->getHardwareId()
                << "channel:" << selectedChannel->getIdentifier();
            m_selectedDevice = selectedDevice;
            m_selectedChannel = selectedChannel;
            m_selectedIndex = index;
        }
        else
        {
            qWarning("JogdialController::handleMessage: MsgSelectChannel: index out of range: %d", index);
        }

        return true;
    }
	else
	{
		return false;
	}
}

QByteArray JogdialController::serialize() const
{
    return m_settings.serialize();
}

bool JogdialController::deserialize(const QByteArray& data)
{
    if (m_settings.deserialize(data))
    {
        MsgConfigureJogdialController *msg = MsgConfigureJogdialController::create(m_settings, true);
        m_inputMessageQueue.push(msg);
        return true;
    }
    else
    {
        m_settings.resetToDefaults();
        MsgConfigureJogdialController *msg = MsgConfigureJogdialController::create(m_settings, true);
        m_inputMessageQueue.push(msg);
        return false;
    }
}

void JogdialController::applySettings(const JogdialControllerSettings& settings, bool force)
{
    qDebug() << "JogdialController::applySettings:"
            << " m_title: " << settings.m_title
            << " m_rgbColor: " << settings.m_rgbColor
            << " m_useReverseAPI: " << settings.m_useReverseAPI
            << " m_reverseAPIAddress: " << settings.m_reverseAPIAddress
            << " m_reverseAPIPort: " << settings.m_reverseAPIPort
            << " m_reverseAPIFeatureSetIndex: " << settings.m_reverseAPIFeatureSetIndex
            << " m_reverseAPIFeatureIndex: " << settings.m_reverseAPIFeatureIndex
            << " force: " << force;

    QList<QString> reverseAPIKeys;

    if ((m_settings.m_title != settings.m_title) || force) {
        reverseAPIKeys.append("title");
    }
    if ((m_settings.m_rgbColor != settings.m_rgbColor) || force) {
        reverseAPIKeys.append("rgbColor");
    }

    if (settings.m_useReverseAPI)
    {
        bool fullUpdate = ((m_settings.m_useReverseAPI != settings.m_useReverseAPI) && settings.m_useReverseAPI) ||
                (m_settings.m_reverseAPIAddress != settings.m_reverseAPIAddress) ||
                (m_settings.m_reverseAPIPort != settings.m_reverseAPIPort) ||
                (m_settings.m_reverseAPIFeatureSetIndex != settings.m_reverseAPIFeatureSetIndex) ||
                (m_settings.m_reverseAPIFeatureIndex != settings.m_reverseAPIFeatureIndex);
        webapiReverseSendSettings(reverseAPIKeys, settings, fullUpdate || force);
    }

    m_settings = settings;
}

void JogdialController::updateChannels()
{
    MainCore *mainCore = MainCore::instance();
    std::vector<DeviceSet*>& deviceSets = mainCore->getDeviceSets();
    std::vector<DeviceSet*>::const_iterator it = deviceSets.begin();
    m_availableChannels.clear();

    int deviceIndex = 0;

    for (; it != deviceSets.end(); ++it, deviceIndex++)
    {
        DSPDeviceSourceEngine *deviceSourceEngine =  (*it)->m_deviceSourceEngine;
        DSPDeviceSinkEngine *deviceSinkEngine =  (*it)->m_deviceSinkEngine;
        DeviceAPI *device = (*it)->m_deviceAPI;
        device->getHardwareId();

        if (deviceSourceEngine || deviceSinkEngine)
        {
            for (int chi = 0; chi < (*it)->getNumberOfChannels(); chi++)
            {
                ChannelAPI *channel = (*it)->getChannelAt(chi);
                JogdialControllerSettings::AvailableChannel availableChannel =
                    JogdialControllerSettings::AvailableChannel{
                        deviceSinkEngine != nullptr,
                        deviceIndex,
                        chi,
                        device,
                        channel,
                        device->getHardwareId(),
                        channel->getIdentifier()
                    };
                m_availableChannels.push_back(availableChannel);
            }
        }
    }

    if (getMessageQueueToGUI())
    {
        MsgReportChannels *msgToGUI = MsgReportChannels::create();
        QList<JogdialControllerSettings::AvailableChannel>& msgAvailableChannels = msgToGUI->getAvailableChannels();
        msgAvailableChannels = m_availableChannels;
        getMessageQueueToGUI()->push(msgToGUI);
    }
}

void JogdialController::channelUp()
{
    if ((m_selectedIndex < 0) || (m_availableChannels.size() == 0)) {
        return;
    }

    m_selectedIndex++;

    if (m_selectedIndex >= m_availableChannels.size()) {
        m_selectedIndex = 0;
    }

    m_selectedDevice = m_availableChannels.at(m_selectedIndex).m_deviceAPI;
    m_selectedChannel =  m_availableChannels.at(m_selectedIndex).m_channelAPI;

    if (getMessageQueueToGUI())
    {
        MsgSelectChannel *msgToGUI = MsgSelectChannel::create(m_selectedIndex);
        getMessageQueueToGUI()->push(msgToGUI);
    }
}

void JogdialController::channelDown()
{
    if ((m_selectedIndex < 0) || (m_availableChannels.size() == 0)) {
        return;
    }

    m_selectedIndex--;

    if (m_selectedIndex < 0) {
        m_selectedIndex = m_availableChannels.size() - 1;
    }

    m_selectedDevice = m_availableChannels.at(m_selectedIndex).m_deviceAPI;
    m_selectedChannel =  m_availableChannels.at(m_selectedIndex).m_channelAPI;

    if (getMessageQueueToGUI())
    {
        MsgSelectChannel *msgToGUI = MsgSelectChannel::create(m_selectedIndex);
        getMessageQueueToGUI()->push(msgToGUI);
    }
}

int JogdialController::webapiRun(bool run,
    SWGSDRangel::SWGDeviceState& response,
    QString& errorMessage)
{
    (void) errorMessage;
    getFeatureStateStr(*response.getState());
    MsgStartStop *msg = MsgStartStop::create(run);
    getInputMessageQueue()->push(msg);
    return 202;
}

int JogdialController::webapiSettingsGet(
    SWGSDRangel::SWGFeatureSettings& response,
    QString& errorMessage)
{
    (void) errorMessage;
    response.setJogdialControllerSettings(new SWGSDRangel::SWGJogdialControllerSettings());
    response.getJogdialControllerSettings()->init();
    webapiFormatFeatureSettings(response, m_settings);
    return 200;
}

int JogdialController::webapiSettingsPutPatch(
    bool force,
    const QStringList& featureSettingsKeys,
    SWGSDRangel::SWGFeatureSettings& response,
    QString& errorMessage)
{
    (void) errorMessage;
    JogdialControllerSettings settings = m_settings;
    webapiUpdateFeatureSettings(settings, featureSettingsKeys, response);

    MsgConfigureJogdialController *msg = MsgConfigureJogdialController::create(settings, force);
    m_inputMessageQueue.push(msg);

    qDebug("JogdialController::webapiSettingsPutPatch: forward to GUI: %p", m_guiMessageQueue);
    if (m_guiMessageQueue) // forward to GUI if any
    {
        MsgConfigureJogdialController *msgToGUI = MsgConfigureJogdialController::create(settings, force);
        m_guiMessageQueue->push(msgToGUI);
    }

    webapiFormatFeatureSettings(response, settings);

    return 200;
}

void JogdialController::webapiFormatFeatureSettings(
    SWGSDRangel::SWGFeatureSettings& response,
    const JogdialControllerSettings& settings)
{
    if (response.getJogdialControllerSettings()->getTitle()) {
        *response.getJogdialControllerSettings()->getTitle() = settings.m_title;
    } else {
        response.getJogdialControllerSettings()->setTitle(new QString(settings.m_title));
    }

    response.getJogdialControllerSettings()->setRgbColor(settings.m_rgbColor);
    response.getJogdialControllerSettings()->setUseReverseApi(settings.m_useReverseAPI ? 1 : 0);

    if (response.getJogdialControllerSettings()->getReverseApiAddress()) {
        *response.getJogdialControllerSettings()->getReverseApiAddress() = settings.m_reverseAPIAddress;
    } else {
        response.getJogdialControllerSettings()->setReverseApiAddress(new QString(settings.m_reverseAPIAddress));
    }

    response.getJogdialControllerSettings()->setReverseApiPort(settings.m_reverseAPIPort);
    response.getJogdialControllerSettings()->setReverseApiFeatureSetIndex(settings.m_reverseAPIFeatureSetIndex);
    response.getJogdialControllerSettings()->setReverseApiFeatureIndex(settings.m_reverseAPIFeatureIndex);

    if (settings.m_rollupState)
    {
        if (response.getJogdialControllerSettings()->getRollupState())
        {
            settings.m_rollupState->formatTo(response.getJogdialControllerSettings()->getRollupState());
        }
        else
        {
            SWGSDRangel::SWGRollupState *swgRollupState = new SWGSDRangel::SWGRollupState();
            settings.m_rollupState->formatTo(swgRollupState);
            response.getJogdialControllerSettings()->setRollupState(swgRollupState);
        }
    }
}

void JogdialController::webapiUpdateFeatureSettings(
    JogdialControllerSettings& settings,
    const QStringList& featureSettingsKeys,
    SWGSDRangel::SWGFeatureSettings& response)
{
    if (featureSettingsKeys.contains("title")) {
        settings.m_title = *response.getJogdialControllerSettings()->getTitle();
    }
    if (featureSettingsKeys.contains("rgbColor")) {
        settings.m_rgbColor = response.getJogdialControllerSettings()->getRgbColor();
    }
    if (featureSettingsKeys.contains("useReverseAPI")) {
        settings.m_useReverseAPI = response.getJogdialControllerSettings()->getUseReverseApi() != 0;
    }
    if (featureSettingsKeys.contains("reverseAPIAddress")) {
        settings.m_reverseAPIAddress = *response.getJogdialControllerSettings()->getReverseApiAddress();
    }
    if (featureSettingsKeys.contains("reverseAPIPort")) {
        settings.m_reverseAPIPort = response.getJogdialControllerSettings()->getReverseApiPort();
    }
    if (featureSettingsKeys.contains("reverseAPIFeatureSetIndex")) {
        settings.m_reverseAPIFeatureSetIndex = response.getJogdialControllerSettings()->getReverseApiFeatureSetIndex();
    }
    if (featureSettingsKeys.contains("reverseAPIFeatureIndex")) {
        settings.m_reverseAPIFeatureIndex = response.getJogdialControllerSettings()->getReverseApiFeatureIndex();
    }
    if (settings.m_rollupState && featureSettingsKeys.contains("rollupState")) {
        settings.m_rollupState->updateFrom(featureSettingsKeys, response.getJogdialControllerSettings()->getRollupState());
    }
}

void JogdialController::webapiReverseSendSettings(QList<QString>& featureSettingsKeys, const JogdialControllerSettings& settings, bool force)
{
    SWGSDRangel::SWGFeatureSettings *swgFeatureSettings = new SWGSDRangel::SWGFeatureSettings();
    // swgFeatureSettings->setOriginatorFeatureIndex(getIndexInDeviceSet());
    // swgFeatureSettings->setOriginatorFeatureSetIndex(getDeviceSetIndex());
    swgFeatureSettings->setFeatureType(new QString("JogdialAnalyzer"));
    swgFeatureSettings->setJogdialControllerSettings(new SWGSDRangel::SWGJogdialControllerSettings());
    SWGSDRangel::SWGJogdialControllerSettings *swgJogdialControllerSettings = swgFeatureSettings->getJogdialControllerSettings();

    // transfer data that has been modified. When force is on transfer all data except reverse API data

    if (featureSettingsKeys.contains("title") || force) {
        swgJogdialControllerSettings->setTitle(new QString(settings.m_title));
    }
    if (featureSettingsKeys.contains("rgbColor") || force) {
        swgJogdialControllerSettings->setRgbColor(settings.m_rgbColor);
    }

    QString channelSettingsURL = QString("http://%1:%2/sdrangel/featureset/%3/feature/%4/settings")
            .arg(settings.m_reverseAPIAddress)
            .arg(settings.m_reverseAPIPort)
            .arg(settings.m_reverseAPIFeatureSetIndex)
            .arg(settings.m_reverseAPIFeatureIndex);
    m_networkRequest.setUrl(QUrl(channelSettingsURL));
    m_networkRequest.setHeader(QNetworkRequest::ContentTypeHeader, "application/json");

    QBuffer *buffer = new QBuffer();
    buffer->open((QBuffer::ReadWrite));
    buffer->write(swgFeatureSettings->asJson().toUtf8());
    buffer->seek(0);

    // Always use PATCH to avoid passing reverse API settings
    QNetworkReply *reply = m_networkManager->sendCustomRequest(m_networkRequest, "PATCH", buffer);
    buffer->setParent(reply);

    delete swgFeatureSettings;
}

void JogdialController::networkManagerFinished(QNetworkReply *reply)
{
    QNetworkReply::NetworkError replyError = reply->error();

    if (replyError)
    {
        qWarning() << "JogdialController::networkManagerFinished:"
                << " error(" << (int) replyError
                << "): " << replyError
                << ": " << reply->errorString();
    }
    else
    {
        QString answer = reply->readAll();
        answer.chop(1); // remove last \n
        qDebug("JogdialController::networkManagerFinished: reply:\n%s", answer.toStdString().c_str());
    }

    reply->deleteLater();
}

void JogdialController::handleChannelMessageQueue(MessageQueue* messageQueue)
{
    Message* message;

    while ((message = messageQueue->pop()) != nullptr)
    {
        if (handleMessage(*message)) {
            delete message;
        }
    }
}

void JogdialController::commandKeyPressed(Qt::Key key, Qt::KeyboardModifiers keyModifiers, bool release)
{
    (void) release;

    if (key == Qt::Key_C)
    {
        m_deviceElseChannelControl = false;

        if (m_guiMessageQueue) {
            m_guiMessageQueue->push(MsgReportControl::create(false));
        }
    }
    else if (key == Qt::Key_D)
    {
        m_deviceElseChannelControl = true;

        if (m_guiMessageQueue) {
            m_guiMessageQueue->push(MsgReportControl::create(true));
        }
    }
    else if (key == Qt::Key_Left)
    {
        channelDown();
    }
    else if (key == Qt::Key_Right)
    {
        channelUp();
    }
    else if (key == Qt::Key_Up)
    {
        m_repeatTimer.stop();

        if (keyModifiers == Qt::NoModifier) {
            stepFrequency(1);
        } else if (keyModifiers == Qt::ControlModifier) {
            stepFrequency(10);
        } else if (keyModifiers == Qt::ShiftModifier) {
            stepFrequency(100);
        } else if (keyModifiers == (Qt::ControlModifier | Qt::ShiftModifier)) {
            stepFrequency(1000);
        }
    }
    else if (key == Qt::Key_Down)
    {
        m_repeatTimer.stop();

        if (keyModifiers == Qt::NoModifier) {
            stepFrequency(-1);
        } else if (keyModifiers == Qt::ControlModifier) {
            stepFrequency(-10);
        } else if (keyModifiers == Qt::ShiftModifier) {
            stepFrequency(-100);
        } else if (keyModifiers == (Qt::ControlModifier | Qt::ShiftModifier)) {
            stepFrequency(-1000);
        }
    }
    else if (key == Qt::Key_Home)
    {
        resetChannelFrequency();
    }
    else if (key == Qt::Key_0)
    {
        m_repeatTimer.stop();
    }
    else if (key == Qt::Key_1)
    {
        m_multiplier = 1;
        m_repeatTimer.start(m_repeatms);
    }
    else if (key == Qt::Key_2)
    {
        m_multiplier = 10;
        m_repeatTimer.start(m_repeatms);
    }
    else if (key == Qt::Key_3)
    {
        m_multiplier = 100;
        m_repeatTimer.start(m_repeatms);
    }
    else if (key == Qt::Key_4)
    {
        m_multiplier = 1000;
        m_repeatTimer.start(m_repeatms);
    }
    else if (key == Qt::Key_5)
    {
        m_multiplier = 10000;
        m_repeatTimer.start(m_repeatms);
    }
    else if (key == Qt::Key_6)
    {
        m_multiplier = 100000;
        m_repeatTimer.start(m_repeatms);
    }
    else if (key == Qt::Key_7)
    {
        m_multiplier = 1000000;
        m_repeatTimer.start(m_repeatms);
    }
    else if (key == Qt::Key_Exclam)
    {
        m_multiplier = -1;
        m_repeatTimer.start(m_repeatms);
    }
    else if (key == Qt::Key_At)
    {
        m_multiplier = -10;
        m_repeatTimer.start(m_repeatms);
    }
    else if (key == Qt::Key_NumberSign)
    {
        m_multiplier = -100;
        m_repeatTimer.start(m_repeatms);
    }
    else if (key == Qt::Key_Dollar)
    {
        m_multiplier = -1000;
        m_repeatTimer.start(m_repeatms);
    }
    else if (key == Qt::Key_Percent)
    {
        m_multiplier = -10000;
        m_repeatTimer.start(m_repeatms);
    }
    else if ((key == Qt::Key_Dead_Circumflex) || (key == Qt::Key_AsciiCircum))
    {
        m_multiplier = -100000;
        m_repeatTimer.start(m_repeatms);
    }
    else if (key == Qt::Key_Ampersand)
    {
        m_multiplier = -1000000;
        m_repeatTimer.start(m_repeatms);
    }
}

void JogdialController::resetChannelFrequency()
{
    if (m_selectedChannel) {
        m_selectedChannel->setCenterFrequency(0);
    }
}

void JogdialController::stepFrequency(int step)
{
    qDebug("JogdialController::stepFrequency: step: %d", step);
    if (m_deviceElseChannelControl)
    {
        if (m_selectedDevice)
        {
            DSPDeviceSourceEngine *sourceEngine = m_selectedDevice->getDeviceSourceEngine();
            DSPDeviceSinkEngine *sinkEngine = m_selectedDevice->getDeviceSinkEngine();

            if (sourceEngine)
            {
                quint64 frequency = sourceEngine->getSource()->getCenterFrequency();
                qDebug("JogdialController::stepFrequency: frequency: %llu", frequency);
                sourceEngine->getSource()->setCenterFrequency(frequency + step*1000LL);
            }

            if (sinkEngine)
            {
                quint64 frequency = sinkEngine->getSink()->getCenterFrequency();
                sinkEngine->getSink()->setCenterFrequency(frequency + step*1000LL);
            }
        }
    }
    else
    {
        if (m_selectedChannel)
        {
            qint64 frequency = m_selectedChannel->getCenterFrequency();
            m_selectedChannel->setCenterFrequency(frequency + step);
        }
    }
}

void JogdialController::handleRepeat()
{
    stepFrequency(m_multiplier);
}