/* -*- c-basic-offset: 4 indent-tabs-mode: nil -*-  vi:set ts=8 sts=4 sw=4: */

/*
    Sonic Visualiser
    An audio file viewer and annotation editor.
    Centre for Digital Music, Queen Mary, University of London.
    
    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.  See the file
    COPYING included with this distribution for more information.
*/

#include "TransformUserConfigurator.h"

#include "transform/TransformFactory.h"

#include "widgets/PluginParameterDialog.h"

#include "plugin/FeatureExtractionPluginFactory.h"
#include "plugin/RealTimePluginFactory.h"
#include "plugin/RealTimePluginInstance.h"

#include "data/model/DenseTimeValueModel.h"

#include <vamp-hostsdk/Plugin.h>

#include <QStringList>

#include <typeinfo>

static QWidget *parentWidget = nullptr;

void
TransformUserConfigurator::setParentWidget(QWidget *w)
{
    parentWidget = w;
}

bool
TransformUserConfigurator::getChannelRange(TransformId identifier,
                                           std::shared_ptr<Vamp::PluginBase> plugin,
                                           int &minChannels, int &maxChannels)
{
    if (plugin && plugin->getType() == "Feature Extraction Plugin") {
        auto vp = std::dynamic_pointer_cast<Vamp::Plugin>(plugin);
        if (vp) {
            SVDEBUG << "TransformUserConfigurator::getChannelRange: is a Vamp plugin" << endl;
            minChannels = int(vp->getMinChannelCount());
            maxChannels = int(vp->getMaxChannelCount());
            return true;
        } else {
            SVCERR << "TransformUserConfigurator::getChannelRange: inconsistent plugin identity!" << endl;
            return false;
        }
    } else {
        SVDEBUG << "TransformUserConfigurator::getChannelRange: is not a Vamp plugin" << endl;
        return TransformFactory::getInstance()->
            getTransformChannelRange(identifier, minChannels, maxChannels);
    }
}

bool
TransformUserConfigurator::configure(ModelTransformer::Input &input,
                                     Transform &transform,
                                     std::shared_ptr<Vamp::PluginBase> plugin,
                                     ModelId &inputModel,
                                     AudioPlaySource *source,
                                     sv_frame_t startFrame,
                                     sv_frame_t duration,
                                     const QMap<QString, ModelId> &modelMap,
                                     QStringList candidateModelNames,
                                     QString defaultModelName)
{
    bool ok = false;
    QString id = transform.getPluginIdentifier();
    QString output = transform.getOutput();
    QString outputLabel = "";
    QString outputDescription = "";

    bool frequency = false;
    bool effect = false;
    bool generator = false;

    if (!plugin) return false;

    SVDEBUG << "TransformUserConfigurator::configure: identifier " << id << endl;
    
    if (RealTimePluginFactory::instanceFor(id)) {

        RealTimePluginFactory *factory = RealTimePluginFactory::instanceFor(id);
        RealTimePluginDescriptor desc = factory->getPluginDescriptor(id);

        if (desc.audioInputPortCount > 0 && 
            desc.audioOutputPortCount > 0 &&
            !desc.isSynth) {
            effect = true;
        }

        if (desc.audioInputPortCount == 0) {
            generator = true;
        }

        if (output != "A") {
            int outputNo = output.toInt();
            if (outputNo >= 0 && outputNo < int(desc.controlOutputPortCount)) {
                outputLabel = desc.controlOutputPortNames[outputNo].c_str();
            }
        }

        auto auditionable = std::dynamic_pointer_cast<Auditionable>(plugin);
        
        if (effect && source && auditionable) {
            SVDEBUG << "Setting auditioning effect" << endl;
            source->setAuditioningEffect(auditionable);
        }

    } else {

        auto vp = std::dynamic_pointer_cast<Vamp::Plugin>(plugin);

        frequency = (vp->getInputDomain() == Vamp::Plugin::FrequencyDomain);

        std::vector<Vamp::Plugin::OutputDescriptor> od =
            vp->getOutputDescriptors();

        if (od.size() > 1) {
            for (size_t i = 0; i < od.size(); ++i) {
                if (od[i].identifier == output.toStdString()) {
                    outputLabel = od[i].name.c_str();
                    outputDescription = od[i].description.c_str();
                    break;
                }
            }
        }
    }
    
    int sourceChannels = 1;

    if (auto dtvm = ModelById::getAs<DenseTimeValueModel>(inputModel)) {
        sourceChannels = dtvm->getChannelCount();
    }

    int minChannels = 1, maxChannels = sourceChannels;
    getChannelRange(transform.getIdentifier(), plugin,
                    minChannels, maxChannels);

    int targetChannels = sourceChannels;
    if (!effect) {
        if (sourceChannels < minChannels) targetChannels = minChannels;
        if (sourceChannels > maxChannels) targetChannels = maxChannels;
    }

    int defaultChannel = -1; //!!! no longer saved! [was context.channel]

    PluginParameterDialog *dialog = new PluginParameterDialog
        (plugin, parentWidget);

    dialog->setMoreInfoUrl(TransformFactory::getInstance()->
                           getTransformProvider(transform.getIdentifier())
                           .infoUrl);

    if (candidateModelNames.size() > 1 && !generator) {
        dialog->setCandidateInputModels(candidateModelNames,
                                        defaultModelName);
    }

    if (startFrame != 0 || duration != 0) {
        dialog->setShowSelectionOnlyOption(true);
    }

    if (targetChannels > 0) {
        dialog->setChannelArrangement(sourceChannels, targetChannels,
                                      defaultChannel);
    }
        
    dialog->setOutputLabel(outputLabel, outputDescription);
        
    dialog->setShowProcessingOptions(true, frequency);

    if (dialog->exec() == QDialog::Accepted) {
        ok = true;
    }

    QString selectedInput = dialog->getInputModel();
    if (selectedInput != "") {
        if (modelMap.contains(selectedInput)) {
            inputModel = modelMap.value(selectedInput);
            SVDEBUG << "Found selected input \"" << selectedInput << "\" in model map, result is " << inputModel << endl;
        } else {
            SVDEBUG << "Failed to find selected input \"" << selectedInput << "\" in model map" << endl;
        }
    } else {
        SVDEBUG << "Selected input empty: \"" << selectedInput << "\"" << endl;
    }
        
    // Write parameters back to transform object
    TransformFactory::getInstance()->
        setParametersFromPlugin(transform, plugin);

    input.setChannel(dialog->getChannel());
        
    //!!! The dialog ought to be taking & returning transform
    //objects and input objects and stuff rather than passing
    //around all this misc stuff, but that's for tomorrow
    //(whenever that may be)

    sv_samplerate_t sampleRate = 0;
    if (auto m = ModelById::get(inputModel)) {
        sampleRate = m->getSampleRate();
    }
    
    if (startFrame != 0 || duration != 0) {
        if (dialog->getSelectionOnly() && sampleRate != 0) {
            transform.setStartTime
                (RealTime::frame2RealTime(startFrame, sampleRate));
            transform.setDuration
                (RealTime::frame2RealTime(duration, sampleRate));
        }
    }

    int stepSize = 0, blockSize = 0;
    WindowType windowType = HanningWindow;

    dialog->getProcessingParameters(stepSize,
                                    blockSize,
                                    windowType);

    transform.setStepSize(stepSize);
    transform.setBlockSize(blockSize);
    transform.setWindowType(windowType);

    delete dialog;

    if (effect && source) {
        source->setAuditioningEffect({});
    }

    return ok;
}

