/*
    SPDX-FileCopyrightText: 2014 Christian Dávid <christian-david@web.de>
    SPDX-License-Identifier: GPL-2.0-or-later
*/

#include "kpayeeidentifierview.h"
#include "ui_kpayeeidentifierview.h"

#include <algorithm>

#include <QPointer>
#include <QAbstractItemDelegate>
#include <QStyledItemDelegate>

#include "payeeidentifiercontainermodel.h"
#include "payeeidentifierselectiondelegate.h"
#include "widgets/payeeidentifier/ibanbic/ibanbicitemdelegate.h"
#include "widgets/payeeidentifier/nationalaccount/nationalaccountdelegate.h"

payeeIdentifierDelegate::payeeIdentifierDelegate(QObject* parent)
    : StyledItemDelegateForwarder(parent)
{
}

QAbstractItemDelegate* payeeIdentifierDelegate::getItemDelegate(const QModelIndex& index) const
{
    static QPointer<QAbstractItemDelegate> defaultDelegate;
    const QString type = (index.isValid()) ? index.model()->data(index, payeeIdentifierContainerModel::payeeIdentifierType).toString() : QString();

    if (type.isEmpty()) {
        QAbstractItemDelegate* delegate = new payeeIdentifierSelectionDelegate(this->parent());
        connectSignals(delegate);
        return delegate;
    }

    QAbstractItemDelegate* delegate = nullptr;
    // Use this->parent() as parent because "this" is const
    if (type == payeeIdentifiers::ibanBic::staticPayeeIdentifierIid()) {
        delegate = new ibanBicItemDelegate(this->parent());
    } else if (type == payeeIdentifiers::nationalAccount::staticPayeeIdentifierIid()) {
        delegate = new nationalAccountDelegate(this->parent());
    }

    if (delegate == nullptr) {
        if (defaultDelegate == nullptr)
            defaultDelegate = new QStyledItemDelegate(this->parent());
        delegate = defaultDelegate;
    }
    connectSignals(delegate, Qt::UniqueConnection);
    Q_ASSERT(delegate);
    return delegate;
}

KPayeeIdentifierView::KPayeeIdentifierView(QWidget* parent)
    : QWidget(parent),
      ui(new Ui::KPayeeIdentifierView)
{
    ui->setupUi(this);
    ui->view->setItemDelegate(new payeeIdentifierDelegate(ui->view));
}

KPayeeIdentifierView::~KPayeeIdentifierView()
{
    delete ui;
}

void KPayeeIdentifierView::setSource(MyMoneyPayeeIdentifierContainer container)
{
    if (ui->view->model() == nullptr) {
        // this model must be closed after each KMyMoneyApp::fileLoaded signal
        // to limit includes, it is connected outside of this class
        auto model = new payeeIdentifierContainerModel(ui->view);
        connect(model, &payeeIdentifierContainerModel::dataChanged, this, &KPayeeIdentifierView::dataChanged);
        connect(model, &payeeIdentifierContainerModel::rowsRemoved, this, &KPayeeIdentifierView::dataChanged);
        ui->view->setModel(model);
    }

    Q_ASSERT(qobject_cast<payeeIdentifierContainerModel*>(ui->view->model()));    // this should never fail but may help during debugging
    static_cast<payeeIdentifierContainerModel*>(ui->view->model())->setSource(container);

    // Open persistent editor for last row
    ui->view->openPersistentEditor(ui->view->model()->index(ui->view->model()->rowCount(QModelIndex()) - 1, 0));
}

void KPayeeIdentifierView::closeSource()
{
    auto model = ui->view->model();
    if (model)
        static_cast<payeeIdentifierContainerModel*>(model)->closeSource();
}

QList< payeeIdentifier > KPayeeIdentifierView::identifiers() const
{
    const QAbstractItemModel* model = ui->view->model();
    if (model != nullptr)
        return static_cast<const payeeIdentifierContainerModel*>(model)->identifiers();
    return QList< payeeIdentifier >();
}

/**
 * @brief Helper to sort QModelIndexList in decreasing order.
 */
inline bool QModelIndexRowComparison(const QModelIndex& first, const QModelIndex& second)
{
    return (first.row() > second.row());
}

/**
 * @bug If the last row is removed the type selection editor (which is always behind that last row) closes.
 * Maybe that is a Qt bug?!
 */
void KPayeeIdentifierView::removeSelected()
{
    QModelIndexList selectedRows = ui->view->selectionModel()->selectedRows();
    // To keep the items valid during remove the data must be removed from highest row
    // to the lowest. Unfortunately QList has no reverse iterator.
    std::sort(selectedRows.begin(), selectedRows.end(), QModelIndexRowComparison);

    QAbstractItemModel* model = ui->view->model();
    Q_ASSERT(model);

    QModelIndexList::const_iterator end = selectedRows.cend();
    for (QModelIndexList::const_iterator iter = selectedRows.cbegin(); iter != end; ++iter)
        model->removeRow(iter->row(), iter->parent());
}
