///////////////////////////////////////////////////////////////////////////////////
// Copyright (C) 2016 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                  //
//                                                                               //
// 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 <plugin/plugininstanceui.h>
#include "device/devicesourceapi.h"
#include "device/devicesinkapi.h"
#include "plugin/pluginapi.h"
#include "plugin/plugininterface.h"
#include "gui/glspectrum.h"
#include "gui/channelwindow.h"
#include "mainwindow.h"
#include "settings/preset.h"

// TODO: extract GUI dependencies in a separate object
DeviceSourceAPI::DeviceSourceAPI(MainWindow *mainWindow,
        int deviceTabIndex,
        DSPDeviceSourceEngine *deviceSourceEngine,
        GLSpectrum *glSpectrum,
        ChannelWindow *channelWindow) :
    m_mainWindow(mainWindow),
    m_deviceTabIndex(deviceTabIndex),
    m_deviceSourceEngine(deviceSourceEngine),
    m_spectrum(glSpectrum),
    m_channelWindow(channelWindow),
    m_sampleSourceSequence(0),
    m_pluginInterface(0),
    m_sampleSourcePluginInstanceUI(0),
    m_buddySharedPtr(0),
    m_isBuddyLeader(false),
    m_masterTimer(mainWindow->getMasterTimer()) // TODO: get master timer directly not from main window
{
}

DeviceSourceAPI::~DeviceSourceAPI()
{
}

void DeviceSourceAPI::addSink(BasebandSampleSink *sink)
{
    m_deviceSourceEngine->addSink(sink);
}

void DeviceSourceAPI::removeSink(BasebandSampleSink* sink)
{
    m_deviceSourceEngine->removeSink(sink);
}

void DeviceSourceAPI::addThreadedSink(ThreadedBasebandSampleSink* sink)
{
    m_deviceSourceEngine->addThreadedSink(sink);
}

void DeviceSourceAPI::removeThreadedSink(ThreadedBasebandSampleSink* sink)
{
    m_deviceSourceEngine->removeThreadedSink(sink);
}

void DeviceSourceAPI::setSampleSource(DeviceSampleSource* source)
{
    m_deviceSourceEngine->setSource(source);
}

DeviceSampleSource *DeviceSourceAPI::getSampleSource()
{
    return m_deviceSourceEngine->getSource();
}

bool DeviceSourceAPI::initAcquisition()
{
    return m_deviceSourceEngine->initAcquisition();
}

bool DeviceSourceAPI::startAcquisition()
{
    return m_deviceSourceEngine->startAcquisition();
}

void DeviceSourceAPI::stopAcquisition()
{
    m_deviceSourceEngine->stopAcquistion();
}

DSPDeviceSourceEngine::State DeviceSourceAPI::state() const
{
    return m_deviceSourceEngine->state();
}

QString DeviceSourceAPI::errorMessage()
{
    return m_deviceSourceEngine->errorMessage();
}

uint DeviceSourceAPI::getDeviceUID() const
{
    return m_deviceSourceEngine->getUID();
}

MessageQueue *DeviceSourceAPI::getDeviceEngineInputMessageQueue()
{
    return m_deviceSourceEngine->getInputMessageQueue();
}

MessageQueue *DeviceSourceAPI::getDeviceEngineOutputMessageQueue()
{
    return m_deviceSourceEngine->getOutputMessageQueue();
}

void DeviceSourceAPI::configureCorrections(bool dcOffsetCorrection, bool iqImbalanceCorrection)
{
    m_deviceSourceEngine->configureCorrections(dcOffsetCorrection, iqImbalanceCorrection);
}

GLSpectrum *DeviceSourceAPI::getSpectrum()
{
    return m_spectrum;
}

void DeviceSourceAPI::addChannelMarker(ChannelMarker* channelMarker)
{
    m_spectrum->addChannelMarker(channelMarker);
}

ChannelWindow *DeviceSourceAPI::getChannelWindow()
{
    return m_channelWindow;
}

void DeviceSourceAPI::addRollupWidget(QWidget *widget)
{
    m_channelWindow->addRollupWidget(widget);
}

void DeviceSourceAPI::setHardwareId(const QString& id)
{
    m_hardwareId = id;
}

void DeviceSourceAPI::setSampleSourceId(const QString& id)
{
    m_sampleSourceId = id;
}

void DeviceSourceAPI::resetSampleSourceId()
{
    m_sampleSourceId.clear();
}

void DeviceSourceAPI::setSampleSourceSerial(const QString& serial)
{
    m_sampleSourceSerial = serial;
}

void DeviceSourceAPI::setSampleSourceDisplayName(const QString& name)
{
    m_sampleSourceDisplayName = name;
}

void DeviceSourceAPI::setSampleSourceSequence(int sequence)
{
    m_sampleSourceSequence = sequence;
    m_deviceSourceEngine->setSourceSequence(sequence);
}

void DeviceSourceAPI::setSampleSourcePluginInterface(PluginInterface *iface)
{
    m_pluginInterface = iface;
}

void DeviceSourceAPI::setSampleSourcePluginInstanceGUI(PluginInstanceUI *gui)
{
    m_sampleSourcePluginInstanceUI = gui;
}

void DeviceSourceAPI::registerChannelInstance(const QString& channelName, PluginInstanceUI* pluginGUI)
{
    m_channelInstanceRegistrations.append(ChannelInstanceRegistration(channelName, pluginGUI));
    renameChannelInstances();
}

void DeviceSourceAPI::removeChannelInstance(PluginInstanceUI* pluginGUI)
{
    for(ChannelInstanceRegistrations::iterator it = m_channelInstanceRegistrations.begin(); it != m_channelInstanceRegistrations.end(); ++it)
    {
        if(it->m_gui == pluginGUI)
        {
            m_channelInstanceRegistrations.erase(it);
            break;
        }
    }

    renameChannelInstances();
}

void DeviceSourceAPI::renameChannelInstances()
{
    for(int i = 0; i < m_channelInstanceRegistrations.count(); i++)
    {
        m_channelInstanceRegistrations[i].m_gui->setName(QString("%1:%2").arg(m_channelInstanceRegistrations[i].m_channelName).arg(i));
    }
}

void DeviceSourceAPI::freeChannels()
{
//    while(!m_channelInstanceRegistrations.isEmpty())
//    {
//        ChannelInstanceRegistration reg(m_channelInstanceRegistrations.takeLast());
//        reg.m_gui->destroy();
//    }

    for(int i = 0; i < m_channelInstanceRegistrations.count(); i++)
    {
        qDebug("DeviceSourceAPI::freeAll: destroying channel [%s]", qPrintable(m_channelInstanceRegistrations[i].m_channelName));
        m_channelInstanceRegistrations[i].m_gui->destroy();
    }
}

void DeviceSourceAPI::loadSourceSettings(const Preset* preset)
{
    if (preset->isSourcePreset())
    {
        qDebug("DeviceSourceAPI::loadSourceSettings: Loading preset [%s | %s]", qPrintable(preset->getGroup()), qPrintable(preset->getDescription()));

        if(m_sampleSourcePluginInstanceUI != 0)
        {
            const QByteArray* sourceConfig = preset->findBestDeviceConfig(m_sampleSourceId, m_sampleSourceSerial, m_sampleSourceSequence);

            if (sourceConfig != 0)
            {
                qDebug("DeviceSourceAPI::loadSettings: deserializing source %s[%d]: %s", qPrintable(m_sampleSourceId), m_sampleSourceSequence, qPrintable(m_sampleSourceSerial));
                m_sampleSourcePluginInstanceUI->deserialize(*sourceConfig);
            }
            else
            {
                qDebug("DeviceSourceAPI::loadSettings: source %s[%d]: %s not found", qPrintable(m_sampleSourceId), m_sampleSourceSequence, qPrintable(m_sampleSourceSerial));
            }

            qint64 centerFrequency = preset->getCenterFrequency();
            qDebug("DeviceSourceAPI::loadSettings: center frequency: %llu Hz", centerFrequency);
            m_sampleSourcePluginInstanceUI->setCenterFrequency(centerFrequency);
        }
    }
    else
    {
        qDebug("DeviceSourceAPI::loadSourceSettings: Loading preset [%s | %s] is not a source preset\n", qPrintable(preset->getGroup()), qPrintable(preset->getDescription()));
    }
}

void DeviceSourceAPI::saveSourceSettings(Preset* preset)
{
    if (preset->isSourcePreset())
    {
        if(m_sampleSourcePluginInstanceUI != NULL)
        {
            qDebug("DeviceSourceAPI::saveSourceSettings: %s saved", qPrintable(m_sampleSourcePluginInstanceUI->getName()));
            preset->addOrUpdateDeviceConfig(m_sampleSourceId, m_sampleSourceSerial, m_sampleSourceSequence, m_sampleSourcePluginInstanceUI->serialize());
            preset->setCenterFrequency(m_sampleSourcePluginInstanceUI->getCenterFrequency());
        }
        else
        {
            qDebug("DeviceSourceAPI::saveSourceSettings: no source");
        }
    }
    else
    {
        qDebug("DeviceSourceAPI::saveSourceSettings: not a source preset");
    }
}

void DeviceSourceAPI::loadChannelSettings(const Preset *preset, PluginAPI *pluginAPI)
{
    if (preset->isSourcePreset())
    {
        qDebug("DeviceSourceAPI::loadChannelSettings: Loading preset [%s | %s]", qPrintable(preset->getGroup()), qPrintable(preset->getDescription()));

        // Available channel plugins
        PluginAPI::ChannelRegistrations *channelRegistrations = pluginAPI->getRxChannelRegistrations();

        // copy currently open channels and clear list
        ChannelInstanceRegistrations openChannels = m_channelInstanceRegistrations;
        m_channelInstanceRegistrations.clear();

        qDebug("DeviceSourceAPI::loadChannelSettings: %d channel(s) in preset", preset->getChannelCount());

        for(int i = 0; i < preset->getChannelCount(); i++)
        {
            const Preset::ChannelConfig& channelConfig = preset->getChannelConfig(i);
            ChannelInstanceRegistration reg;

            // if we have one instance available already, use it

            for(int i = 0; i < openChannels.count(); i++)
            {
                qDebug("DeviceSourceAPI::loadChannelSettings: channels compare [%s] vs [%s]", qPrintable(openChannels[i].m_channelName), qPrintable(channelConfig.m_channel));

                if(openChannels[i].m_channelName == channelConfig.m_channel)
                {
                    qDebug("DeviceSourceAPI::loadChannelSettings: channel [%s] found", qPrintable(openChannels[i].m_channelName));
                    reg = openChannels.takeAt(i);
                    m_channelInstanceRegistrations.append(reg);
                    break;
                }
            }

            // if we haven't one already, create one

            if(reg.m_gui == NULL)
            {
                for(int i = 0; i < channelRegistrations->count(); i++)
                {
                    if((*channelRegistrations)[i].m_channelName == channelConfig.m_channel)
                    {
                        qDebug("DeviceSourceAPI::loadChannelSettings: creating new channel [%s]", qPrintable(channelConfig.m_channel));
                        reg = ChannelInstanceRegistration(channelConfig.m_channel, (*channelRegistrations)[i].m_plugin->createRxChannel(channelConfig.m_channel, this));
                        break;
                    }
                }
            }

            if(reg.m_gui != NULL)
            {
                qDebug("DeviceSourceAPI::loadChannelSettings: deserializing channel [%s]", qPrintable(channelConfig.m_channel));
                reg.m_gui->deserialize(channelConfig.m_config);
            }
        }

        // everything, that is still "available" is not needed anymore
        for(int i = 0; i < openChannels.count(); i++)
        {
            qDebug("DeviceSourceAPI::loadChannelSettings: destroying spare channel [%s]", qPrintable(openChannels[i].m_channelName));
            openChannels[i].m_gui->destroy();
        }

        renameChannelInstances();
    }
    else
    {
        qDebug("DeviceSourceAPI::loadChannelSettings: Loading preset [%s | %s] not a source preset", qPrintable(preset->getGroup()), qPrintable(preset->getDescription()));
    }
}

void DeviceSourceAPI::saveChannelSettings(Preset *preset)
{
    if (preset->isSourcePreset())
    {
        qSort(m_channelInstanceRegistrations.begin(), m_channelInstanceRegistrations.end()); // sort by increasing delta frequency and type

        for(int i = 0; i < m_channelInstanceRegistrations.count(); i++)
        {
            qDebug("DeviceSourceAPI::saveChannelSettings: channel [%s] saved", qPrintable(m_channelInstanceRegistrations[i].m_channelName));
            preset->addChannel(m_channelInstanceRegistrations[i].m_channelName, m_channelInstanceRegistrations[i].m_gui->serialize());
        }
    }
    else
    {
        qDebug("DeviceSourceAPI::saveChannelSettings: not a source preset");
    }
}

// sort by increasing delta frequency and type (i.e. name)
bool DeviceSourceAPI::ChannelInstanceRegistration::operator<(const ChannelInstanceRegistration& other) const
{
    if (m_gui && other.m_gui)
    {
        if (m_gui->getCenterFrequency() == other.m_gui->getCenterFrequency())
        {
            return m_gui->getName() < other.m_gui->getName();
        }
        else
        {
            return m_gui->getCenterFrequency() < other.m_gui->getCenterFrequency();
        }
    }
    else
    {
        return false;
    }
}

void DeviceSourceAPI::addSourceBuddy(DeviceSourceAPI* buddy)
{
    std::vector<DeviceSourceAPI*>::iterator it = m_sourceBuddies.begin();

    m_sourceBuddies.push_back(buddy);
    buddy->m_sourceBuddies.push_back(this);
    qDebug("DeviceSourceAPI::addSourceBuddy: added buddy %s(%s) [%lx] <-> [%lx]",
            qPrintable(buddy->getHardwareId()),
            qPrintable(buddy->getSampleSourceSerial()),
            (uint64_t) buddy,
            (uint64_t) this);
}

void DeviceSourceAPI::addSinkBuddy(DeviceSinkAPI* buddy)
{
    std::vector<DeviceSinkAPI*>::iterator it = m_sinkBuddies.begin();

    m_sinkBuddies.push_back(buddy);
    buddy->m_sourceBuddies.push_back(this);
    qDebug("DeviceSourceAPI::addSinkBuddy: added buddy %s(%s) [%lx] <-> [%lx]",
            qPrintable(buddy->getHardwareId()),
            qPrintable(buddy->getSampleSinkSerial()),
            (uint64_t) buddy,
            (uint64_t) this);
}

void DeviceSourceAPI::removeSourceBuddy(DeviceSourceAPI* buddy)
{
    std::vector<DeviceSourceAPI*>::iterator it = m_sourceBuddies.begin();

    for (;it != m_sourceBuddies.end(); ++it)
    {
        if (*it == buddy)
        {
            qDebug("DeviceSourceAPI::removeSourceBuddy: buddy %s(%s) [%lx] removed from the list of [%lx]",
                    qPrintable(buddy->getHardwareId()),
                    qPrintable(buddy->getSampleSourceSerial()),
                    (uint64_t) (*it),
                    (uint64_t) this);
            m_sourceBuddies.erase(it);
            return;
        }
    }

    qDebug("DeviceSourceAPI::removeSourceBuddy: buddy %s(%s) [%lx] not found in the list of [%lx]",
            qPrintable(buddy->getHardwareId()),
            qPrintable(buddy->getSampleSourceSerial()),
            (uint64_t) buddy,
            (uint64_t) this);
}

void DeviceSourceAPI::removeSinkBuddy(DeviceSinkAPI* buddy)
{
    std::vector<DeviceSinkAPI*>::iterator it = m_sinkBuddies.begin();

    for (;it != m_sinkBuddies.end(); ++it)
    {
        if (*it == buddy)
        {
            qDebug("DeviceSourceAPI::removeSinkBuddy: buddy %s(%s) [%lx] removed from the list of [%lx]",
                    qPrintable(buddy->getHardwareId()),
                    qPrintable(buddy->getSampleSinkSerial()),
                    (uint64_t) (*it),
                    (uint64_t) this);
            m_sinkBuddies.erase(it);
            return;
        }
    }

    qDebug("DeviceSourceAPI::removeSinkBuddy: buddy %s(%s) [%lx] not found in the list of [%lx]",
            qPrintable(buddy->getHardwareId()),
            qPrintable(buddy->getSampleSinkSerial()),
            (uint64_t) buddy,
            (uint64_t) this);
}

void DeviceSourceAPI::clearBuddiesLists()
{
    std::vector<DeviceSourceAPI*>::iterator itSource = m_sourceBuddies.begin();
    std::vector<DeviceSinkAPI*>::iterator itSink = m_sinkBuddies.begin();
    bool leaderElected = false;

    for (;itSource != m_sourceBuddies.end(); ++itSource)
    {
        if (isBuddyLeader() && !leaderElected)
        {
            (*itSource)->setBuddyLeader(true);
            leaderElected = true;
        }

        (*itSource)->removeSourceBuddy(this);
    }

    m_sourceBuddies.clear();

    for (;itSink != m_sinkBuddies.end(); ++itSink)
    {
        if (isBuddyLeader() && !leaderElected)
        {
            (*itSink)->setBuddyLeader(true);
            leaderElected = true;
        }

        (*itSink)->removeSourceBuddy(this);
    }

    m_sinkBuddies.clear();
}