/**
 * UGENE - Integrated Bioinformatics Tools.
 * Copyright (C) 2008-2023 UniPro <ugene@unipro.ru>
 * http://ugene.net
 *
 * 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., 51 Franklin Street, Fifth Floor, Boston,
 * MA 02110-1301, USA.
 */

#pragma once

#include <QComboBox>

#include <U2Core/DNAAlphabet.h>
#include <U2Core/U2SafePoints.h>

#include <U2Gui/GroupedComboBoxDelegate.h>

#include <U2View/MsaEditor.h>

class QStandardItemModel;

namespace U2 {

class ComboBoxSignalHandler : public QObject {
    Q_OBJECT
public:
    ComboBoxSignalHandler(QWidget* parent = nullptr)
        : QObject(parent) {
        comboBox = new QComboBox(parent);
        comboBox->setItemDelegate(new GroupedComboBoxDelegate(comboBox));
        connect(comboBox, SIGNAL(currentIndexChanged(int)), this, SLOT(sl_indexChanged(int)));
    }
    QComboBox* getComboBox() {
        return comboBox;
    }
signals:
    void si_dataChanged(const QString& newScheme);
private slots:
    void sl_indexChanged(int index) {
        emit si_dataChanged(comboBox->itemData(index).toString());
    }

protected:
    QComboBox* comboBox;
};

template<class Factory, class Registry>
class MsaSchemeComboBoxController : public ComboBoxSignalHandler {
public:
    MsaSchemeComboBoxController(MsaEditor* msa, Registry* registry, QWidget* parent = nullptr);
    void init();
    void setCurrentItemById(const QString& id);

private:
    void fillCbWithGrouping();
    void createAndFillGroup(QList<Factory*> rawSchemesFactories, const QString& groupName);

    MsaEditor* msa;
    Registry* registry;
};

template<class Factory, class Registry>
MsaSchemeComboBoxController<Factory, Registry>::MsaSchemeComboBoxController(MsaEditor* _msa, Registry* _registry, QWidget* parent /*= NULL*/)
    : ComboBoxSignalHandler(parent), msa(_msa), registry(_registry) {
    init();
}

template<class Factory, class Registry>
void MsaSchemeComboBoxController<Factory, Registry>::init() {
    CHECK(registry != nullptr, );

    bool isAlphabetRaw = msa->getMaObject()->getAlphabet()->getType() == DNAAlphabet_RAW;

    comboBox->blockSignals(true);
    comboBox->clear();
    if (isAlphabetRaw) {
        fillCbWithGrouping();
    } else {
        CHECK(msa->getMaObject(), );
        CHECK(msa->getMaObject()->getAlphabet(), );
        DNAAlphabetType alphabetType = msa->getMaObject()->getAlphabet()->getType();
        QList<Factory*> schemesFactories = registry->getAllSchemes(alphabetType);
        Factory* emptySchemeFactory = registry->getEmptySchemeFactory();
        schemesFactories.removeAll(emptySchemeFactory);
        schemesFactories.prepend(emptySchemeFactory);
        foreach (Factory* factory, schemesFactories) {
            comboBox->addItem(factory->getName(), factory->getId());
        }
    }
    comboBox->blockSignals(false);
}

template<class Factory, class Registry>
void MsaSchemeComboBoxController<Factory, Registry>::setCurrentItemById(const QString& id) {
    comboBox->setCurrentIndex(comboBox->findData(id));
}

template<class Factory, class Registry>
void MsaSchemeComboBoxController<Factory, Registry>::fillCbWithGrouping() {
    QMap<AlphabetFlags, QList<Factory*>> schemesFactories = registry->getAllSchemesGrouped();
    Factory* emptySchemeFactory = registry->getEmptySchemeFactory();

    QList<Factory*> commonSchemesFactories = schemesFactories[DNAAlphabet_RAW | DNAAlphabet_AMINO | DNAAlphabet_NUCL];
    QList<Factory*> aminoSchemesFactories = schemesFactories[DNAAlphabet_RAW | DNAAlphabet_AMINO];
    QList<Factory*> nucleotideSchemesFactories = schemesFactories[DNAAlphabet_RAW | DNAAlphabet_NUCL];

    commonSchemesFactories.removeAll(emptySchemeFactory);
    commonSchemesFactories.prepend(emptySchemeFactory);

    createAndFillGroup(commonSchemesFactories, tr("All alphabets"));
    createAndFillGroup(aminoSchemesFactories, tr("Amino acid alphabet"));
    createAndFillGroup(nucleotideSchemesFactories, tr("Nucleotide alphabet"));
}

template<class Factory, class Registry>
void MsaSchemeComboBoxController<Factory, Registry>::createAndFillGroup(QList<Factory*> rawSchemesFactories, const QString& groupName) {
    CHECK(!rawSchemesFactories.isEmpty(), );
    auto schemeDelegate = qobject_cast<GroupedComboBoxDelegate*>(comboBox->itemDelegate());
    auto schemeModel = qobject_cast<QStandardItemModel*>(comboBox->model());
    CHECK(schemeDelegate != nullptr, );
    CHECK(schemeModel != nullptr, );
    schemeDelegate->addParentItem(schemeModel, groupName);
    foreach (Factory* factory, rawSchemesFactories) {
        schemeDelegate->addChildItem(schemeModel, factory->getName(), factory->getId());
    }
}

}  // namespace U2
