/*
    SPDX-FileCopyrightText: 2015-2019 Thomas Baumgart <tbaumgart@kde.org>
    SPDX-License-Identifier: GPL-2.0-or-later
*/

#include "ledgerview.h"

// ----------------------------------------------------------------------------
// QT Includes

#include <QAction>
#include <QApplication>
#include <QDate>
#include <QDebug>
#include <QHeaderView>
#include <QMenu>
#include <QPainter>
#include <QResizeEvent>
#include <QScrollBar>
#include <QSortFilterProxyModel>
#include <QStackedWidget>
#include <QToolTip>
#include <QWidgetAction>

// ----------------------------------------------------------------------------
// KDE Includes

#include <KDualAction>
#include <KGuiItem>
#include <KLocalizedString>
#include <KMessageBox>
#include <KMessageWidget>
#include <KStandardGuiItem>

// ----------------------------------------------------------------------------
// Project Includes

#include "accountsmodel.h"
#include "columnselector.h"
#include "delegateproxy.h"
#include "journaldelegate.h"
#include "journalmodel.h"
#include "kmymoneyaccountselector.h"
#include "kmymoneysettings.h"
#include "kmymoneyview.h"
#include "kmymoneyviewbase.h"
#include "ledgersortproxymodel.h"
#include "ledgerviewsettings.h"
#include "menuenums.h"
#include "mymoneyenums.h"
#include "mymoneyfile.h"
#include "mymoneymoney.h"
#include "mymoneysecurity.h"
#include "mymoneyutils.h"
#include "onlinebalancedelegate.h"
#include "reconciliationdelegate.h"
#include "reconciliationmodel.h"
#include "schedulesjournalmodel.h"
#include "securityaccountnamedelegate.h"
#include "securityaccountsproxymodel.h"
#include "selectedobjects.h"
#include "specialdatedelegate.h"
#include "specialdatesmodel.h"
#include "transactioneditorbase.h"

struct GlobalEditData {
    LedgerView* detailView = nullptr;
    KMyMoneyViewBase* basePage = nullptr;
    QString accountId;
    QString journalEntryId;
};

Q_GLOBAL_STATIC(GlobalEditData, s_globalEditData);

class LedgerView::Private
{
    Q_DISABLE_COPY_MOVE(Private)

public:
    Private(LedgerView* qq)
        : q(qq)
        , journalDelegate(new JournalDelegate(q))
        , onlineBalanceDelegate(new OnlineBalanceDelegate(q))
        , specialDatesDelegate(new SpecialDateDelegate(q))
        , reconciliationDelegate(new ReconciliationDelegate(q))
        , securityAccuntNameDelegate(new SecurityAccountNameDelegate(q))
        , delegateProxy(new DelegateProxy(q))
        , moveToAccountSelector(nullptr)
        , columnSelector(nullptr)
        , infoMessage(new KMessageWidget(q))
        , editor(nullptr)
        , adjustableColumn(JournalModel::Column::Detail)
        , adjustingColumn(false)
        , showValuesInverted(false)
        , newTransactionPresent(false)
        , reselectAfterResetPending(false)
        , selectOnly(false)
    {
        infoMessage->hide();

        delegateProxy->addDelegate(eMyMoney::Delegates::Types::JournalDelegate, journalDelegate);
        delegateProxy->addDelegate(eMyMoney::Delegates::Types::OnlineBalanceDelegate, onlineBalanceDelegate);
        delegateProxy->addDelegate(eMyMoney::Delegates::Types::SpecialDateDelegate, specialDatesDelegate);
        delegateProxy->addDelegate(eMyMoney::Delegates::Types::SchedulesDelegate, journalDelegate);
        delegateProxy->addDelegate(eMyMoney::Delegates::Types::ReconciliationDelegate, reconciliationDelegate);
        delegateProxy->addDelegate(eMyMoney::Delegates::Types::SecurityAccountNameDelegate, securityAccuntNameDelegate);

        q->setItemDelegate(delegateProxy);
    }

    void setSingleLineDetailRole(eMyMoney::Model::Roles role)
    {
        journalDelegate->setSingleLineRole(role);
    }

    void ensureEditorFullyVisible(const QModelIndex& idx)
    {
        const auto viewportHeight = q->viewport()->height();
        const auto verticalOffset = q->verticalHeader()->offset();
        const auto verticalPosition = q->verticalHeader()->sectionPosition(idx.row());
        const auto cellHeight = q->verticalHeader()->sectionSize(idx.row());

        // in case the idx is displayed past the viewport
        // adjust the position of the scroll area
        if (verticalPosition - verticalOffset + cellHeight > viewportHeight) {
            q->verticalScrollBar()->setValue(q->verticalScrollBar()->maximum());
        }
    }

    bool haveGlobalEditor()
    {
        return s_globalEditData()->detailView != nullptr;
    }

    void registerGlobalEditor(const QModelIndex& idx)
    {
        if (!haveGlobalEditor()) {
            s_globalEditData()->detailView = q;
            s_globalEditData()->journalEntryId = idx.data(eMyMoney::Model::IdRole).toString();
            s_globalEditData()->accountId = idx.data(eMyMoney::Model::JournalSplitAccountIdRole).toString();

            // find my base view
            // KPageStackedWidget;
            auto w = q->parentWidget();
            while (w) {
                auto pageStack = qobject_cast<QStackedWidget*>(w);
                if (pageStack != nullptr) {
                    if (qobject_cast<KMyMoneyView*>(pageStack->parentWidget())) {
                        s_globalEditData()->basePage = qobject_cast<KMyMoneyViewBase*>(pageStack->currentWidget());
                        break;
                    }
                }
                w = w->parentWidget();
            }
        }
    }

    void unregisterGlobalEditor()
    {
        s_globalEditData()->detailView = nullptr;
        s_globalEditData()->basePage = nullptr;
        s_globalEditData()->journalEntryId.clear();
        s_globalEditData()->accountId.clear();
    }

    void createMoveToSubMenu()
    {
        if (!moveToAccountSelector) {
            auto menu = pMenus[eMenu::Menu::MoveTransaction];
            if (menu) {
                const auto actionList = menu->actions();
                // the account selector is only created the first time this is called. All following calls will
                // reuse the created selector. The assumption is, that the first entry is the submenu header and
                // the second is the account selector. Everything else is a programming mistake and causes a crash.
                switch (actionList.count()) {
                case 1: // the header is the only thing in the menu
                {
                    auto accountSelectorAction = new QWidgetAction(menu);
                    moveToAccountSelector = new KMyMoneyAccountSelector(menu, {}, false);
                    moveToAccountSelector->setObjectName("transaction_move_menu_selector");
                    accountSelectorAction->setDefaultWidget(moveToAccountSelector);
                    menu->addAction(accountSelectorAction);
                    q->connect(moveToAccountSelector, &KMyMoneySelector::itemSelected, q, &LedgerView::slotMoveToAccount);
                } break;

                case 2: // the header and the selector are newTransactionPresent
                {
                    auto accountSelectorAction = qobject_cast<QWidgetAction*>(actionList.at(1));
                    if (accountSelectorAction) {
                        moveToAccountSelector = qobject_cast<KMyMoneyAccountSelector*>(accountSelectorAction->defaultWidget());
                    }
                } break;

                default:
                    qFatal("Found misalignment with MoveTransaction menu. Please have fixed by developer.");
                    break;
                }
            }
        }
    }

    eMenu::Menu updateDynamicActions()
    {
        eMenu::Menu menuType = eMenu::Menu::Transaction;

        const auto indexes = q->selectionModel()->selectedIndexes();
        auto const gotoAccount = pActions[eMenu::Action::GoToAccount];
        auto const gotoPayee = pActions[eMenu::Action::GoToPayee];

        gotoAccount->setText(i18nc("@action:inmenu open account", "Go to account"));
        gotoAccount->setEnabled(false);
        gotoPayee->setText(i18nc("@action:inmenu open payee", "Go to payee"));
        gotoPayee->setEnabled(false);

        if (!indexes.isEmpty()) {
            const auto baseIdx = MyMoneyFile::instance()->journalModel()->mapToBaseSource(indexes.at(0));
            const auto journalEntry = MyMoneyFile::instance()->journalModel()->itemByIndex(baseIdx);

            // if this entry points to the schedules, we switch the menu type
            if (baseIdx.model() == MyMoneyFile::instance()->schedulesJournalModel()) {
                menuType = eMenu::Menu::Schedule;
            }

            MyMoneyAccount acc;
            if (!q->isColumnHidden(JournalModel::Column::Account)) {
                // in case the account column is shown, we jump to that account
                acc = MyMoneyFile::instance()->account(journalEntry.split().accountId());
            } else {
                // otherwise, we try to find a suitable asset/liability account
                for (const auto& split : journalEntry.transaction().splits()) {
                    acc = MyMoneyFile::instance()->account(split.accountId());
                    if (split.id() != journalEntry.split().id()) {
                        if (!acc.isIncomeExpense()) {
                            // for stock accounts we show the portfolio account
                            if (acc.isInvest()) {
                                acc = MyMoneyFile::instance()->account(acc.parentAccountId());
                            }
                            break;
                        }
                    }
                    acc.clearId();
                }
                // try looking for a suitable category in case we
                // did not find an account, but we don't support
                // jumping to categories when there are more than one
                if (acc.id().isEmpty() && (journalEntry.transaction().splitCount() == 2)) {
                    const auto counterId = baseIdx.data(eMyMoney::Model::TransactionCounterAccountIdRole).toString();
                    acc = MyMoneyFile::instance()->account(counterId);
                }
            }

            // found an account, update the action
            if (!acc.id().isEmpty()) {
                auto name = acc.name();
                name.replace(QRegularExpression(QLatin1String("&(?!&)")), QLatin1String("&&"));
                gotoAccount->setEnabled(true);
                gotoAccount->setText(i18nc("@action:inmenu open account", "Go to '%1'", name));
                gotoAccount->setData(acc.id());
            }

            if (!journalEntry.split().payeeId().isEmpty()) {
                auto payeeId = indexes.at(0).data(eMyMoney::Model::SplitPayeeIdRole).toString();
                if (!payeeId.isEmpty()) {
                    auto name = indexes.at(0).data(eMyMoney::Model::SplitPayeeRole).toString();
                    name.replace(QRegularExpression(QLatin1String("&(?!&)")), QLatin1String("&&"));
                    gotoPayee->setEnabled(true);
                    gotoPayee->setText(i18nc("@action:inmenu open payee", "Go to '%1'", name));
                    gotoPayee->setData(payeeId);
                }
            }
        }

        // for a transaction context menu we need to update the
        // "move to account" destinations
        if (menuType == eMenu::Menu::Transaction) {
            const auto file = MyMoneyFile::instance();
            createMoveToSubMenu();

            // in case we were not able to create the selector, we
            // better get out of here. Anything else would cause
            // a crash later on (accountSet.load)
            if (moveToAccountSelector) {
                const auto selectedAccountId = selection.firstSelection(SelectedObjects::Account);
                const auto accountIdx = file->accountsModel()->indexById(selectedAccountId);
                AccountSet accountSet;

                auto loadAssetLiabilityTypes = [&]() {
                    accountSet.addAccountType(eMyMoney::Account::Type::Checkings);
                    accountSet.addAccountType(eMyMoney::Account::Type::Savings);
                    accountSet.addAccountType(eMyMoney::Account::Type::Cash);
                    accountSet.addAccountType(eMyMoney::Account::Type::AssetLoan);
                    accountSet.addAccountType(eMyMoney::Account::Type::CertificateDep);
                    accountSet.addAccountType(eMyMoney::Account::Type::MoneyMarket);
                    accountSet.addAccountType(eMyMoney::Account::Type::Asset);
                    accountSet.addAccountType(eMyMoney::Account::Type::Currency);
                    accountSet.addAccountType(eMyMoney::Account::Type::CreditCard);
                    accountSet.addAccountType(eMyMoney::Account::Type::Loan);
                    accountSet.addAccountType(eMyMoney::Account::Type::Liability);
                };

                bool isInvestmentMove(false);
                if (accountIdx.isValid()) {
                    if (accountIdx.data(eMyMoney::Model::AccountTypeRole).value<eMyMoney::Account::Type>() == eMyMoney::Account::Type::Investment) {
                        isInvestmentMove = true;
                        accountSet.addAccountType(eMyMoney::Account::Type::Investment);

                    } else if (accountIdx.data(eMyMoney::Model::AccountIsAssetLiabilityRole).toBool()) {
                        loadAssetLiabilityTypes();

                    } else if (accountIdx.data(eMyMoney::Model::AccountIsIncomeExpenseRole).toBool()) {
                        accountSet.addAccountType(eMyMoney::Account::Type::Income);
                        accountSet.addAccountType(eMyMoney::Account::Type::Expense);
                    }
                } else {
                    loadAssetLiabilityTypes();
                }

                accountSet.load(moveToAccountSelector);

                // remove those accounts that we currently reference
                // with the selected items
                KMMStringSet currencyIds;
                for (const auto& journalId : selection.selection(SelectedObjects::JournalEntry)) {
                    const auto journalIdx = file->journalModel()->indexById(journalId);
                    const auto accId = journalIdx.data(eMyMoney::Model::JournalSplitAccountIdRole).toString();
                    // remove myself
                    moveToAccountSelector->removeItem(accId);
                    const auto accIdx = file->accountsModel()->indexById(accId);
                    if (isInvestmentMove) {
                        // and also the parent (investment) account for investment moves
                        moveToAccountSelector->removeItem(accIdx.data(eMyMoney::Model::AccountParentIdRole).toString());
                    }
                    currencyIds.insert(accIdx.data(eMyMoney::Model::AccountCurrencyIdRole).toString());
                }

                if (!isInvestmentMove) {
                    // remove those accounts from the list that are denominated
                    // in a different currency
                    const auto list = moveToAccountSelector->accountList();
                    for (const auto& accId : list) {
                        const auto idx = file->accountsModel()->indexById(accId);
                        if (!currencyIds.contains(idx.data(eMyMoney::Model::AccountCurrencyIdRole).toString())) {
                            moveToAccountSelector->removeItem(accId);
                        }
                    }
                    // in case we have transactions in multiple currencies selected,
                    // the move is not supported.
                    pMenus[eMenu::Menu::MoveTransaction]->setDisabled(currencyIds.size() > 1);

                } else {
                    // remove those accounts from the list that do not
                    // have sub-accounts denominated in all currencies
                    const auto list = moveToAccountSelector->accountList();
                    for (const auto& accId : list) {
                        KMMStringSet securityIds;
                        const auto idx = file->accountsModel()->indexById(accId);
                        const auto rows = file->accountsModel()->rowCount(idx);
                        for (int row = 0; row < rows; ++row) {
                            const auto subIdx = file->accountsModel()->index(row, 0, idx);
                            securityIds.insert(subIdx.data(eMyMoney::Model::AccountCurrencyIdRole).toString());
                        }
                        // if not all are found, remove the account from the list
                        securityIds &= currencyIds;
                        if (securityIds != currencyIds) {
                            moveToAccountSelector->removeItem(accId);
                        }
                    }
                    // in case we have no matching account left
                    // the move is not supported.
                    pMenus[eMenu::Menu::MoveTransaction]->setDisabled(moveToAccountSelector->accountList().isEmpty());
                }
            }
        }

        return menuType;
    }

    QString createSplitTooltip(const QModelIndex& idx)
    {
        QString txt;

        int splitCount = idx.data(eMyMoney::Model::TransactionSplitCountRole).toInt();
        if ((q->currentIndex().row() != idx.row()) && (splitCount > 1)) {
            auto file = MyMoneyFile::instance();
            const auto journalEntryId = idx.data(eMyMoney::Model::IdRole).toString();
            const auto securityId = idx.data(eMyMoney::Model::TransactionCommodityRole).toString();
            const auto security = file->security(securityId);
            MyMoneyMoney factor(MyMoneyMoney::ONE);
            if (!idx.data(eMyMoney::Model::Roles::SplitSharesRole).value<MyMoneyMoney>().isNegative())
                factor = -factor;

            const auto indexes = file->journalModel()->indexesByTransactionId(idx.data(eMyMoney::Model::JournalTransactionIdRole).toString());
            if (!indexes.isEmpty()) {
                txt = QLatin1String("<table style='white-space:pre'>");
                for (const auto& tidx : indexes) {
                    if (tidx.data(eMyMoney::Model::IdRole).toString() == journalEntryId)
                        continue;
                    const auto acc = file->accountsModel()->itemById(tidx.data(eMyMoney::Model::SplitAccountIdRole).toString());
                    const auto category = file->accountToCategory(acc.id());
                    const auto amount =
                        MyMoneyUtils::formatMoney((tidx.data(eMyMoney::Model::SplitValueRole).value<MyMoneyMoney>() * factor), acc, security, true);

                    txt += QString("<tr><td>%1</td><td align=right>%2</td></tr>").arg(category, amount);
                }
                if (splitCount > 2) {
                    txt += QStringLiteral("<tr><td></td><td><hr/></td></tr>");

                    const auto acc = file->accountsModel()->itemById(idx.data(eMyMoney::Model::SplitAccountIdRole).toString());
                    const auto amount =
                        MyMoneyUtils::formatMoney((idx.data(eMyMoney::Model::SplitValueRole).value<MyMoneyMoney>() * (-factor)), acc, security, true);
                    txt += QString("<tr><td></td><td align=right>%2</td></tr>").arg(amount);
                }
                txt += QLatin1String("</table>");
            }
        }
        return txt;
    }

    QVector<eMyMoney::Model::Roles> statusRoles(const QModelIndex& idx) const
    {
        QVector<eMyMoney::Model::Roles> status;
        if (idx.data(eMyMoney::Model::TransactionErroneousRole).toBool()) {
            status.append(eMyMoney::Model::TransactionErroneousRole);
        } else if (idx.data(eMyMoney::Model::ScheduleIsOverdueRole).toBool()) {
            status.append(eMyMoney::Model::ScheduleIsOverdueRole);
        }

        // draw the import icon
        if (idx.data(eMyMoney::Model::TransactionIsImportedRole).toBool()) {
            status.append(eMyMoney::Model::TransactionIsImportedRole);
        }

        // draw the matched icon
        if (idx.data(eMyMoney::Model::JournalSplitIsMatchedRole).toBool()) {
            status.append(eMyMoney::Model::JournalSplitIsMatchedRole);
        }
        return status;
    }

    int iconClickIndex(const QModelIndex& idx, const QPoint& pos)
    {
        const auto font = idx.data(Qt::FontRole).value<QFont>();
        const auto metrics = QFontMetrics(font);
        const auto iconWidth = (metrics.lineSpacing() + 2) + (2 * q->style()->pixelMetric(QStyle::PM_FocusFrameHMargin));
        const auto cellRect = q->visualRect(idx);
        auto iconRect = QRect(cellRect.x() + cellRect.width() - iconWidth, cellRect.y(), iconWidth, iconWidth);
        auto iconIndex = -1;
        for (int i = 0; i < JournalDelegate::maxIcons(); ++i) {
            if (iconRect.contains(pos)) {
                iconIndex = i;
                break;
            }
            iconRect.moveLeft(iconRect.left() - iconWidth);
        }
        return iconIndex;
    }

    void setFonts()
    {
        q->horizontalHeader()->setMinimumSectionSize(20);

        QFont font = KMyMoneySettings::listHeaderFontEx();
        QFontMetrics fm(font);
        int height = fm.lineSpacing() + 6;
        q->horizontalHeader()->setMinimumHeight(height);
        q->horizontalHeader()->setMaximumHeight(height);
        q->horizontalHeader()->setFont(font);

        // setup cell font
        font = KMyMoneySettings::listCellFontEx();
        q->setFont(font);

        journalDelegate->resetLineHeight();
    }

    void setColors()
    {
        specialDatesDelegate->setProperty("groupMarkerColor", KMyMoneySettings::schemeColor(SchemeColor::GroupMarker));
        securityAccuntNameDelegate->setProperty("groupMarkerColor", KMyMoneySettings::schemeColor(SchemeColor::GroupMarker));
        specialDatesDelegate->setProperty("groupMarkerText", KMyMoneySettings::schemeColor(SchemeColor::GroupMarkerText));
        securityAccuntNameDelegate->setProperty("groupMarkerText", KMyMoneySettings::schemeColor(SchemeColor::GroupMarkerText));

        journalDelegate->setProperty("transactionImportedColor", KMyMoneySettings::schemeColor(SchemeColor::TransactionImported));
        journalDelegate->setProperty("transactionImportedText", KMyMoneySettings::schemeColor(SchemeColor::TransactionImportedText));

        journalDelegate->setProperty("transactionMatchedColor", KMyMoneySettings::schemeColor(SchemeColor::TransactionMatched));
        journalDelegate->setProperty("transactionMatchedText", KMyMoneySettings::schemeColor(SchemeColor::TransactionMatchedText));

        journalDelegate->setProperty("erroneousText", KMyMoneySettings::schemeColor(SchemeColor::TransactionErroneous));
    }

    void allowSectionResize()
    {
        auto header = q->horizontalHeader();
        for (int i = 0; i < header->count(); ++i) {
            header->setSectionResizeMode(i, QHeaderView::Interactive);
        }
        header->setSectionResizeMode(JournalModel::Column::Reconciliation, QHeaderView::ResizeToContents);
    }

    void blockSectionResize()
    {
        auto header = q->horizontalHeader();
        for (int i = 0; i < header->count(); ++i) {
            header->setSectionResizeMode(i, QHeaderView::Fixed);
        }
    }

    void resetMaxLineCache()
    {
        auto m = q->LedgerView::model();
        m->setData(QModelIndex(), -1, eMyMoney::Model::JournalSplitMaxLinesCountRole);
    }

    LedgerView* q;
    JournalDelegate* journalDelegate;
    OnlineBalanceDelegate* onlineBalanceDelegate;
    SpecialDateDelegate* specialDatesDelegate;
    ReconciliationDelegate* reconciliationDelegate;
    SecurityAccountNameDelegate* securityAccuntNameDelegate;
    DelegateProxy* delegateProxy;
    KMyMoneyAccountSelector* moveToAccountSelector;
    ColumnSelector* columnSelector;
    KMessageWidget* infoMessage;
    TransactionEditorBase* editor;
    QHash<const QAbstractItemModel*, QStyledItemDelegate*>   delegates;
    int adjustableColumn;
    bool adjustingColumn;
    bool showValuesInverted;
    bool newTransactionPresent;
    bool reselectAfterResetPending;
    bool selectOnly;
    QString accountId;
    QString groupName;
    QPersistentModelIndex editIndex;
    SelectedObjects selection;
    QString firstSelectedId;
    LedgerSortOrder sortOrder;
    QStringList selectionBeforeReset;
    QString currentBeforeReset;
};



LedgerView::LedgerView(QWidget* parent)
    : QTableView(parent)
    , d(new Private(this))
{
    // keep rows as small as possible
    verticalHeader()->setMinimumSectionSize(1);
    verticalHeader()->setSectionResizeMode(QHeaderView::ResizeToContents);
    verticalHeader()->hide();
    setSortingEnabled(false);

    d->setFonts();
    d->setColors();

    // since we don't have a vertical header, it does not make sense
    // to use the first column to select all items in the view
    setCornerButtonEnabled(false);

    // make sure to get informed about resize operations on the columns
    // but delay the execution of adjustDetailColumn() until we return
    // to the main event loop. Also emit information about the change
    // so that other views in the same configuration groupcan sync up.
    // See LedgerView::resizeSection().
    connect(horizontalHeader(), &QHeaderView::sectionResized, this, [&](int logicalIndex, int oldSize, int newSize) {
        Q_EMIT sectionResized(this, d->columnSelector->configGroupName(), logicalIndex, oldSize, newSize);
        QMetaObject::invokeMethod(this, "adjustDetailColumn", Qt::QueuedConnection, Q_ARG(int, viewport()->width()), Q_ARG(bool, false));
    });

    connect(horizontalHeader(), &QHeaderView::sectionMoved, this, [&](int logicalIndex, int oldIndex, int newIndex) {
        Q_EMIT sectionMoved(this, logicalIndex, oldIndex, newIndex);
    });

    // get notifications about setting changes
    connect(LedgerViewSettings::instance(), &LedgerViewSettings::settingsChanged, this, &LedgerView::slotSettingsChanged);

    // we don't need autoscroll as we do not support drag/drop
    setAutoScroll(false);

    setAlternatingRowColors(true);

    setSelectionBehavior(SelectRows);

    // setup context menu
    setContextMenuPolicy(Qt::CustomContextMenu);
    connect(this, &QWidget::customContextMenuRequested, this, [&](QPoint pos) {
        const auto col = columnAt(pos.x());
        const auto row = rowAt(pos.y());
        const auto idx = model()->index(row, col);
        if (idx.flags() & Qt::ItemIsSelectable) {
            const auto menuType = d->updateDynamicActions();
            Q_EMIT requestCustomContextMenu(menuType, viewport()->mapToGlobal(pos));
        }
    });

    connect(d->infoMessage, &KMessageWidget::linkActivated, this, [&](const QString& href) {
        Q_UNUSED(href)
        d->infoMessage->animatedHide();
        Q_EMIT requestView(s_globalEditData()->basePage, s_globalEditData()->accountId, s_globalEditData()->journalEntryId);
    });

    connect(this, &LedgerView::doubleClicked, this, [&](const QModelIndex& index) {
        // double click on a schedule causes the schedule editor to be opened
        if (MyMoneyModelBase::baseModel(index) == MyMoneyFile::instance()->schedulesJournalModel()) {
            pActions[eMenu::Action::EditSchedule]->setData(index.data(eMyMoney::Model::TransactionScheduleIdRole).toString());
            pActions[eMenu::Action::EditSchedule]->trigger();
        }
    });
    connect(horizontalHeader(), &QHeaderView::sectionClicked, this, [&]() {
        Q_EMIT modifySortOrder();
    });
    setTabKeyNavigation(false);
}

LedgerView::~LedgerView()
{
    delete d;
}

void LedgerView::setColumnSelectorGroupName(const QString& groupName)
{
    if (!d->columnSelector) {
        d->groupName = groupName;
    } else {
        qWarning() << "LedgerView::setColumnSelectorGroupName must be called before model assignment";
    }
}

void LedgerView::setShowPayeeInDetailColumn(bool show)
{
    d->journalDelegate->setShowPayeeInDetailColumn(show);
}

void LedgerView::setModel(QAbstractItemModel* model)
{
    if (!d->columnSelector) {
        d->columnSelector = new ColumnSelector(this, d->groupName);
        connect(d->columnSelector, &ColumnSelector::columnsChanged, MyMoneyFile::instance()->journalModel(), &JournalModel::resetRowHeightInformation);
    }
    QSignalBlocker blocker(this);
    QTableView::setModel(model);

    d->columnSelector->setModel(model);

    d->allowSectionResize();

    horizontalHeader()->setSectionsMovable(true);

    connect(model, &QAbstractItemModel::modelAboutToBeReset, this, [&]() {
        // keep the current selected ids as the indeces might change
        d->selectionBeforeReset = selectedJournalEntryIds();
        d->currentBeforeReset = currentIndex().data(eMyMoney::Model::IdRole).toString();

        // turn off updates of the view to reduce flicker
        viewport()->setUpdatesEnabled(false);
    });

    connect(model, &QAbstractItemModel::modelReset, this, [&]() {
        d->resetMaxLineCache();
    });

    horizontalHeader()->setSortIndicatorShown(false);
    horizontalHeader()->setSortIndicator(-1, Qt::AscendingOrder);

    horizontalHeader()->setSectionsClickable(true);
}

void LedgerView::reset()
{
    QTableView::reset();
    if (d->editor) {
        closeEditor(d->editor, QAbstractItemDelegate::NoHint);
        d->editor->deleteLater();
    }

    // make sure to kick-off re-selection only once
    if (!d->reselectAfterResetPending) {
        d->reselectAfterResetPending = true;
        QMetaObject::invokeMethod(this, &LedgerView::reselectAfterModelReset, Qt::QueuedConnection);
    }
}

void LedgerView::reselectAfterModelReset()
{
    // make sure the current index is the first in the list
    auto objectIds = d->selectionBeforeReset;
    if (!d->currentBeforeReset.isEmpty()) {
        objectIds.prepend(d->currentBeforeReset);
    }
    objectIds.removeDuplicates();
    setSelectedJournalEntries(objectIds);

    d->reselectAfterResetPending = false;
    // turn updates back on
    viewport()->setUpdatesEnabled(true);
}

void LedgerView::setAccountId(const QString& id)
{
    d->accountId = id;
    d->selection.setSelection(SelectedObjects::Account, id);
}

const QString& LedgerView::accountId() const
{
    return d->accountId;
}

bool LedgerView::showValuesInverted() const
{
    return d->showValuesInverted;
}

void LedgerView::setColumnsHidden(QVector<int> columns)
{
    d->columnSelector->setAlwaysHidden(columns);
}

void LedgerView::setColumnsShown(QVector<int> columns)
{
    d->columnSelector->setAlwaysVisible(columns);
}

bool LedgerView::edit(const QModelIndex& index, QAbstractItemView::EditTrigger trigger, QEvent* event)
{
    bool suppressDuplicateEditorStart = false;

    switch(trigger) {
    case QAbstractItemView::DoubleClicked:
    case QAbstractItemView::EditKeyPressed:
        suppressDuplicateEditorStart = true;
        break;
    default:
        break;
    }

    if(d->haveGlobalEditor() && suppressDuplicateEditorStart) {
        if (!d->infoMessage->isVisible() && !d->infoMessage->isShowAnimationRunning()) {
            d->infoMessage->resize(viewport()->width(), d->infoMessage->height());
            d->infoMessage->setText(
                i18n("You are already editing a transaction in another view. KMyMoney does not support editing two transactions in parallel. <a "
                     "href=\"jumpToEditor\">Jump to current editor</a>"));
            d->infoMessage->setMessageType(KMessageWidget::Warning);
            d->infoMessage->animatedShow();
        }

    } else {
        bool rc = QTableView::edit(index, trigger, event);

        if(rc) {
            // editing started, but we need the editor to cover all columns
            // so we close it, set the span to have a single row and recreate
            // the editor in that single cell in case an editor was created at all.
            //
            // we double check the presence of the editor, because the delegate
            // may not have created one but QTableView::edit() nevertheless
            // returns true in case it was called with trigger set to
            // QAbstractItemView::AllEditTriggers.
            d->editor = qobject_cast<TransactionEditorBase*>(indexWidget(index));
            closeEditor(indexWidget(index), QAbstractItemDelegate::NoHint);

            // in case the editor was created, we continue to start it. if not
            // the journal delegate took care of stopping editing again by
            // sending signals
            if (d->editor) {
                d->registerGlobalEditor(index);
                d->infoMessage->animatedHide();

                Q_EMIT aboutToStartEdit();
                setSpan(index.row(), 0, 1, horizontalHeader()->count());
                d->editIndex = model()->index(index.row(), 0);

                rc = QTableView::edit(d->editIndex, trigger, event);

                // make sure that the row gets resized according to the requirements of the editor
                // and is completely visible
                d->editor = qobject_cast<TransactionEditorBase*>(indexWidget(d->editIndex));
                connect(d->editor, &TransactionEditorBase::editorLayoutChanged, this, &LedgerView::resizeEditorRow);
                connect(this, &LedgerView::settingsChanged, d->editor, &TransactionEditorBase::slotSettingsChanged);

                // make sure to unregister the editor in case it is destroyed
                connect(d->editor, &TransactionEditorBase::destroyed, this, [&]() {
                    d->unregisterGlobalEditor();
                    d->editor = nullptr;
                });

                resizeEditorRow();

                d->blockSectionResize();
                d->columnSelector->setColumnSelectionDisabled();
            }
        }
        return rc;
    }
    return false;
}

void LedgerView::showEditor()
{
    if (d->haveGlobalEditor()) {
        d->ensureEditorFullyVisible(d->editIndex);
        QMetaObject::invokeMethod(this, "ensureCurrentItemIsVisible", Qt::QueuedConnection);
    }
}

void LedgerView::resizeEditorRow()
{
    resizeRowToContents(d->editIndex.row());
    showEditor();
}

void LedgerView::closeEditor(QWidget* editor, QAbstractItemDelegate::EndEditHint hint)
{
    QTableView::closeEditor(editor, hint);
    clearSpans();

    d->unregisterGlobalEditor();

    // we need to resize the row that contained the editor.
    resizeRowsToContents();

    // and allow the section sizes to be modified again
    d->allowSectionResize();
    d->columnSelector->setColumnSelectionEnabled();

    Q_EMIT aboutToFinishEdit();

    d->editIndex = QModelIndex();
    QMetaObject::invokeMethod(this, &LedgerView::ensureCurrentItemIsVisible, Qt::QueuedConnection);
}

QModelIndex LedgerView::editIndex() const
{
    return d->editIndex;
}

bool LedgerView::viewportEvent(QEvent* event)
{
    if (event->type() == QEvent::ToolTip) {
        auto helpEvent = static_cast<QHelpEvent*>(event);

        // get the row, if it's the header, then we're done
        // otherwise, adjust the row to be 0 based.
        const auto col = columnAt(helpEvent->x());
        const auto row = rowAt(helpEvent->y());
        const auto idx = model()->index(row, col);

        if (col == JournalModel::Column::Detail) {
            bool preventLineBreak(false);
            int iconIndex = d->iconClickIndex(idx, helpEvent->pos());

            QVector<QString> tooltips(JournalDelegate::maxIcons());
            if (iconIndex != -1) {
                int iconCount(0);
                if (idx.data(eMyMoney::Model::TransactionErroneousRole).toBool()) {
                    if (idx.data(eMyMoney::Model::Roles::TransactionSplitCountRole).toInt() < 2) {
                        tooltips[iconCount] = i18nc("@info:tooltip icon description", "Transaction is missing a category assignment.");
                    } else {
                        const auto acc = MyMoneyFile::instance()->account(d->accountId);
                        const auto sec = MyMoneyFile::instance()->security(acc.currencyId());
                        // don't allow line break between amount and currency symbol
                        tooltips[iconCount] =
                            i18nc("@info:tooltip icon description",
                                  "The transaction has a missing assignment of <b>%1</b>.",
                                  MyMoneyUtils::formatMoney(idx.data(eMyMoney::Model::TransactionSplitSumRole).value<MyMoneyMoney>().abs(), acc, sec));
                    }
                    preventLineBreak = true;
                    ++iconCount;

                } else if (idx.data(eMyMoney::Model::ScheduleIsOverdueRole).toBool()) {
                    const auto overdueSince = MyMoneyUtils::formatDate(idx.data(eMyMoney::Model::ScheduleIsOverdueSinceRole).toDate());
                    tooltips[iconCount] =
                        i18nc("@info:tooltip icon description, param is date", "This schedule is overdue since %1. Click on the icon to enter it.")
                            .arg(overdueSince);
                    ++iconCount;
                }

                if (idx.data(eMyMoney::Model::TransactionIsImportedRole).toBool()) {
                    tooltips[iconCount] = i18nc("@info:tooltip icon description", "This transaction is imported. Click on the icon to accept it.");
                    ++iconCount;
                }

                if (idx.data(eMyMoney::Model::JournalSplitIsMatchedRole).toBool()) {
                    tooltips[iconCount] = i18nc("@info:tooltip icon description", "This transaction is matched. Click on the icon to accept or un-match it.");
                    ++iconCount;
                }

            } else if (!LedgerViewSettings::instance()->showAllSplits()) {
                tooltips[0] = d->createSplitTooltip(idx);
                iconIndex = 0;
            }

            if ((iconIndex != -1) && !tooltips[iconIndex].isEmpty()) {
                auto text = tooltips[iconIndex];
                if (preventLineBreak) {
                    text = QString("<p style='white-space:pre'>%1</p>").arg(text);
                }
                QToolTip::showText(helpEvent->globalPos(), tooltips[iconIndex]);
                return true;
            }

        } else if ((col == JournalModel::Column::Payment) || (col == JournalModel::Column::Deposit)) {
            if (!LedgerViewSettings::instance()->showAllSplits()) {
                if (!idx.data(Qt::DisplayRole).toString().isEmpty()) {
                    auto tip = d->createSplitTooltip(idx);
                    if (!tip.isEmpty()) {
                        QToolTip::showText(helpEvent->globalPos(), tip);
                        return true;
                    }
                }
            }
        }

        QToolTip::hideText();
        event->ignore();
        return true;
    }
    return QTableView::viewportEvent(event);
}

void LedgerView::mousePressEvent(QMouseEvent* event)
{
    if (state() != QAbstractItemView::EditingState) {
        if (event->button() != Qt::LeftButton) {
            QTableView::mousePressEvent(event);

        } else {
            const auto pos = event->pos();
            const auto column = columnAt(pos.x());
            // call base class (which modifies the selection) in case the reconciliation
            // column was not clicked or the current index is not selected. This will
            // make sure that if multiple transactions are selected and the reconciliation
            // column is clicked that the selection will not change.
            if (column != JournalModel::Column::Reconciliation || !selectionModel()->isSelected(indexAt(pos))) {
                QTableView::mousePressEvent(event);
            }

            switch (column) {
            case JournalModel::Column::Reconciliation:
                // a click on the reconciliation column triggers the Mark transaction action
                pActions[eMenu::Action::ToggleReconciliationFlag]->trigger();
                break;

            case JournalModel::Column::Detail: {
                // check if an icon was clicked in the detail column
                const auto col = columnAt(event->pos().x());
                const auto row = rowAt(event->pos().y());
                const auto idx = model()->index(row, col);
                const auto iconIndex = d->iconClickIndex(idx, pos);
                const auto statusRoles = this->statusRoles(idx);

                KGuiItem buttonYes = KMMYesNo::yes();
                KGuiItem buttonNo = KMMYesNo::no();
                KGuiItem buttonCancel = KStandardGuiItem::cancel();
                KMessageBox::ButtonCode result;

                if (iconIndex != -1 && (iconIndex < statusRoles.count())) {
                    switch (statusRoles[iconIndex]) {
                    case eMyMoney::Model::ScheduleIsOverdueRole:
                        buttonNo.setToolTip(i18nc("@info:tooltip No button", "Do not enter the overdue scheduled transaction."));
                        buttonYes.setToolTip(i18nc("@info:tooltip Yes button", "Enter the overdue scheduled transaction."));

                        result = KMessageBox::questionTwoActions(this,
                                                                 i18nc("Question about the overdue action", "Do you want to enter the overdue schedule now?"),
                                                                 i18nc("@title:window", "Enter overdue schedule"),
                                                                 buttonYes,
                                                                 buttonNo);
                        if (result == KMessageBox::ButtonCode::PrimaryAction) {
                            pActions[eMenu::Action::EnterSchedule]->setData(idx.data(eMyMoney::Model::JournalTransactionIdRole).toString());
                            pActions[eMenu::Action::EnterSchedule]->trigger();
                        }
                        break;
                    case eMyMoney::Model::TransactionIsImportedRole:
                        pActions[eMenu::Action::AcceptTransaction]->trigger();
                        break;
                    case eMyMoney::Model::JournalSplitIsMatchedRole: {
                        buttonYes.setText(pActions[eMenu::Action::AcceptTransaction]->text());
                        buttonYes.setIcon(pActions[eMenu::Action::AcceptTransaction]->icon());
                        const auto unmatchAction = qobject_cast<KDualAction*>(pActions[eMenu::Action::MatchTransaction]);
                        if (unmatchAction) {
                            unmatchAction->setActive(false);
                            buttonNo.setText(pActions[eMenu::Action::MatchTransaction]->text());
                            buttonNo.setIcon(pActions[eMenu::Action::MatchTransaction]->icon());
                            buttonNo.setToolTip(i18nc("@info:tooltip Unmatch button",
                                                      "Detach the hidden (matched) transaction from the one shown and enter it into the ledger again."));
                            buttonYes.setToolTip(
                                i18nc("@info:tooltip Accept button", "Accept the match as shown and remove the data of the hidden (matched) transaction."));

                            result = KMessageBox::questionTwoActionsCancel(
                                this,
                                i18nc("Question about the accept or unmatch action", "Do you want to accept or unmatch the matched transaction now?"),
                                i18nc("@title:window", "Accept or unmatch transaction"),
                                buttonYes,
                                buttonNo,
                                buttonCancel);
                            switch (result) {
                            case KMessageBox::ButtonCode::PrimaryAction:
                                pActions[eMenu::Action::AcceptTransaction]->trigger();
                                break;
                            case KMessageBox::ButtonCode::SecondaryAction:
                                pActions[eMenu::Action::MatchTransaction]->trigger();
                                break;
                            default:
                                break;
                            }
                        }
                        break;
                    }
                    default:
                        break;
                    }
                }
                break;
            }
            default:
                break;
            }
        }
    }
}

void LedgerView::mouseMoveEvent(QMouseEvent* event)
{
    Q_UNUSED(event);
    // qDebug() << "mouseMoveEvent";
    // QTableView::mouseMoveEvent(event);
}

void LedgerView::mouseDoubleClickEvent(QMouseEvent* event)
{
    // qDebug() << "mouseDoubleClickEvent";
    QTableView::mouseDoubleClickEvent(event);
}

void LedgerView::wheelEvent(QWheelEvent* e)
{
    // qDebug() << "wheelEvent";
    QTableView::wheelEvent(e);
}

void LedgerView::keyPressEvent(QKeyEvent* kev)
{
    if ((d->infoMessage->isVisible()) && kev->matches(QKeySequence::Cancel)) {
        kev->accept();
        d->infoMessage->animatedHide();
    } else {
#ifndef Q_OS_OSX
        if (d->selectOnly) {
            // suppress starting the editor
            if (kev->key() == Qt::Key_F2) {
                return;
            }
        } else {
            // on non OSX operating systems, we turn a return or enter
            // key press into an F2 to start editing the transaction.
            // This is otherwise suppressed. Comment from QAbstractItemView:
            //
            // ### we can't open the editor on enter, becuse
            // some widgets will forward the enter event back
            // to the viewport, starting an endless loop

            QKeyEvent evt(kev->type(), Qt::Key_F2, kev->modifiers(), QString(), kev->isAutoRepeat(), kev->count());
            switch (kev->key()) {
            case Qt::Key_Return:
            case Qt::Key_Enter:
                // send out the modified key event
                // and don't process this one any further
                QApplication::sendEvent(this, &evt);
                return;
            default:
                break;
            }
        }
#endif
        QTableView::keyPressEvent(kev);
    }
}

QModelIndex LedgerView::moveCursor(QAbstractItemView::CursorAction cursorAction, Qt::KeyboardModifiers modifiers)
{
    QModelIndex newIndex;
    bool skipSchedules(false);

    // make sure, that the currentIndex() points to a visible cell
    // since the logic usually selects column 0 this may not always
    // be the case and distracts the call to moveCursor below. In
    // case it's hidden, we search the first visible and use it.
    if (isColumnHidden(currentIndex().column())) {
        for (auto column = 0; column < model()->columnCount(); ++column) {
            if (!isColumnHidden(column)) {
                const auto index = model()->index(currentIndex().row(), column, currentIndex().parent());
                setCurrentIndex(index);
                break;
            }
        }
    }

    if (!(modifiers & Qt::ControlModifier)) {
        // for home and end we need to have the ControlModifier set so
        // that the base class implementation works on rows instead of
        // columns.
        switch (cursorAction) {
        case MoveHome:
        case MoveEnd:
            newIndex = QTableView::moveCursor(cursorAction, modifiers | Qt::ControlModifier);
            skipSchedules = true;
            break;

        default:
            newIndex = QTableView::moveCursor(cursorAction, modifiers);
            break;
        }
    }

    // now make sure that moving the cursor does not hit the empty
    // transaction at the bottom or a schedule.
    for (auto row = newIndex.row(); row >= 0; --row) {
        newIndex = model()->index(row, newIndex.column(), newIndex.parent());
        QString id = newIndex.data(eMyMoney::Model::IdRole).toString();
        // skip the empty transaction at the end of a ledger if
        // the movement is not the down arrow
        if ((id.isEmpty() || id.endsWith('-')) && (cursorAction != MoveDown)) {
            continue;
        }
        // skip scheduled transactions as well if moving to the end
        if (skipSchedules && newIndex.data(eMyMoney::Model::TransactionScheduleRole).toBool()) {
            continue;
        }
        if ((newIndex.flags() & (Qt::ItemIsSelectable | Qt::ItemIsEnabled)) == (Qt::ItemIsSelectable | Qt::ItemIsEnabled)) {
            return newIndex;
        }
    }
    return {};
}

void LedgerView::currentChanged(const QModelIndex& current, const QModelIndex& previous)
{
    QTableView::currentChanged(current, previous);

    if (current.isValid() && current.row() != previous.row()) {
        QModelIndex idx = current.model()->index(current.row(), 0);
        QString id = idx.data(eMyMoney::Model::IdRole).toString();
        // For a new transaction the id is completely empty, for a split view the transaction
        // part is filled but the split id is empty and the string ends with a dash
        if (id.isEmpty() || id.endsWith('-')) {
            // the next two lines prevent an endless recursive call of this method
            if (idx == previous) {
                return;
            }
            // check for an empty account being opened. we can detect
            // that by an invalid previous index and don't start
            // editing right away.
            if (!previous.isValid()) {
                selectRow(idx.row());
                return;
            }
            selectionModel()->clearSelection();
            setCurrentIndex(idx);
            selectRow(idx.row());
            scrollTo(idx, QAbstractItemView::PositionAtBottom);
            edit(idx);
        } else {
            Q_EMIT transactionSelected(idx);
            QMetaObject::invokeMethod(this, &LedgerView::ensureCurrentItemIsVisible, Qt::QueuedConnection);
        }
        QMetaObject::invokeMethod(this, "doItemsLayout", Qt::QueuedConnection);
    }
}

void LedgerView::moveEvent(QMoveEvent* event)
{
    // qDebug() << "moveEvent";
    QWidget::moveEvent(event);
}

void LedgerView::paintEvent(QPaintEvent* event)
{
    QTableView::paintEvent(event);

    // the base class implementation paints the regular grid in case there
    // is room below the last line and the bottom of the viewport. We check
    // here if that is the case and fill that part with the base color to
    // remove the false painted grid.

    const QHeaderView *verticalHeader = this->verticalHeader();
    if(verticalHeader->count() == 0)
        return;

    int lastVisualRow = verticalHeader->visualIndexAt(verticalHeader->viewport()->height());
    if (lastVisualRow == -1)
        lastVisualRow = model()->rowCount(QModelIndex()) - 1;

    while(lastVisualRow >= model()->rowCount(QModelIndex()))
        --lastVisualRow;

    while ((lastVisualRow > -1) && verticalHeader->isSectionHidden(verticalHeader->logicalIndex(lastVisualRow)))
        --lastVisualRow;

    int top = 0;
    if(lastVisualRow != -1)
        top = verticalHeader->sectionViewportPosition(lastVisualRow) + verticalHeader->sectionSize(lastVisualRow);

    if(top < viewport()->height()) {
        QPainter painter(viewport());
        QRect rect(0, top, viewport()->width(), viewport()->height()-top);
        painter.fillRect(rect, QBrush(palette().base()));
    }
}

QVector<eMyMoney::Model::Roles> LedgerView::statusRoles(const QModelIndex& idx) const
{
    return d->statusRoles(idx);
}

void LedgerView::setSingleLineDetailRole(eMyMoney::Model::Roles role)
{
    d->setSingleLineDetailRole(role);
}

int LedgerView::sizeHintForColumn(int col) const
{
    if (col == JournalModel::Column::Reconciliation) {
        QStyleOptionViewItem opt;
        opt.font = font();
        opt.fontMetrics = fontMetrics();
        const QModelIndex index = model()->index(0, col);
        const auto delegate = d->delegateProxy->delegate(index);
        if (delegate) {
            int hint = delegate->sizeHint(opt, index).width();
            if(showGrid())
                hint += 1;
            return hint;
        }
    }
    return QTableView::sizeHintForColumn(col);
}

int LedgerView::sizeHintForRow(int row) const
{
    // we can optimize the sizeHintForRow() operation by asking the
    // delegate about the height. There's no need to use the std
    // method which scans over all items in a column and takes a long
    // time in large ledgers. In case the editor is open in the row, we
    // use the regular method.
    // We always ask for the detail column as this varies in height
    ensurePolished();

    const auto m = model();
    if (m) {
        const QModelIndex index = m->index(row, JournalModel::Column::Detail);
        const auto delegate = d->delegateProxy->delegate(index);
        const auto journalDelegate = qobject_cast<const JournalDelegate*>(delegate);

        if (journalDelegate && (journalDelegate->editorRow() != row)) {
            QStyleOptionViewItem opt;
            opt.font = font();
            opt.fontMetrics = fontMetrics();
            opt.state |= (row == currentIndex().row()) ? QStyle::State_Selected : QStyle::State_None;
            int hint = delegate->sizeHint(opt, index).height();
            if (showGrid())
                hint += 1;
            return hint;
        }
    }
    return QTableView::sizeHintForRow(row);
}

void LedgerView::resizeEvent(QResizeEvent* event)
{
    // qDebug() << "resizeEvent, old:" << event->oldSize() << "new:" << event->size() << "viewport:" << viewport()->width();
    QTableView::resizeEvent(event);
    adjustDetailColumn(event->size().width(), true);
    d->infoMessage->resize(viewport()->width(), d->infoMessage->height());
    d->infoMessage->setWordWrap(false);
    d->infoMessage->setWordWrap(true);
    d->infoMessage->setText(d->infoMessage->text());
}

void LedgerView::adjustDetailColumn(int newViewportWidth, bool informOtherViews)
{
    // make sure we don't get here recursively
    if(d->adjustingColumn)
        return;

    d->adjustingColumn = true;

    QHeaderView* header = horizontalHeader();
    // calling length() here seems to be superfluous, but it forces
    // the execution of some internally pending operations that would
    // otherwise have a negative impact on our operation.
    header->length();

    int totalColumnWidth = 0;
    for (int i = 0; i < header->count(); ++i) {
        if(header->isSectionHidden(i)) {
            continue;
        }
        totalColumnWidth += header->sectionSize(i);
    }
    const int delta = newViewportWidth - totalColumnWidth;
    const int newWidth = header->sectionSize(d->adjustableColumn) + delta;
    if(newWidth > 10) {
        QSignalBlocker blocker(header);
        if (informOtherViews)
            blocker.unblock();
        header->resizeSection(d->adjustableColumn, newWidth);
    }

    // remember that we're done this time
    d->adjustingColumn = false;
}

void LedgerView::ensureCurrentItemIsVisible()
{
    scrollTo(currentIndex(), EnsureVisible);
}

void LedgerView::slotSettingsChanged()
{
    updateGeometries();
    Q_EMIT settingsChanged();

    d->setFonts();
    d->setColors();
    d->resetMaxLineCache();
}

void LedgerView::selectMostRecentTransaction()
{
    if (model()->rowCount() > 0) {

        // we need to check that the last row may contain a scheduled transaction or
        // the row that is shown for new transacations or a special entry (e.g.
        // online balance or date mark).
        // in that case, we need to go back to find the actual last transaction
        int row = model()->rowCount()-1;
        const auto journalModel = MyMoneyFile::instance()->journalModel();
        while(row >= 0) {
            const auto idx = model()->index(row, 0);
            if (MyMoneyFile::baseModel()->baseModel(idx) == journalModel) {
                setCurrentIndex(idx);
                selectRow(idx.row());
                scrollTo(idx, QAbstractItemView::PositionAtBottom);
                break;
            }
            row--;
        }
    }
}

void LedgerView::editNewTransaction()
{
    if (d->selectOnly == false) {
        auto startEditing = [&](const QModelIndex& idx) {
            if (idx.data(eMyMoney::Model::IdRole).toString().isEmpty()) {
                scrollTo(idx, QAbstractItemView::EnsureVisible);
                selectRow(idx.row());
                // if the empty row is already selected, we have to start editing here
                // otherwise, it will happen in currentChanged()
                const auto currentRow = currentIndex().row();
                setCurrentIndex(idx);
                if (idx.row() == currentRow) {
                    edit(idx);
                }
                return true;
            }
            return false;
        };

        // sorting takes care that the new transaction
        // (the one with an empty id) is either at the
        // top or the bottom of the view. So we simply
        // look in both locations and start editing if
        // we find the transaction.
        const auto row = model()->rowCount() - 1;
        if (!startEditing(model()->index(row, 0))) {
            startEditing(model()->index(0, 0));
        }
    }
}

void LedgerView::selectionChanged(const QItemSelection& selected, const QItemSelection& deselected)
{
    // call base class implementation
    QTableView::selectionChanged(selected, deselected);

    KMMSet<int> allSelectedRows;
    KMMSet<int> selectedRows;

    // we need to remember the first item selected as this
    // should always be reported as the first item in the
    // list of selected journalEntries. We have to divide
    // the number of selected indexes by the column count
    // to get the number of selected rows.
    if (selectionModel() && model() && (model()->columnCount() > 0)) {
        switch (selectionModel()->selectedIndexes().count() / model()->columnCount()) {
        case 0:
            d->firstSelectedId.clear();
            break;
        case 1:
            d->firstSelectedId = selectionModel()->selectedIndexes().first().data(eMyMoney::Model::IdRole).toString();
            break;
        default:
            break;
        }
    }

    if (!selected.isEmpty()) {
        int lastRow = -1;
        for (const auto& idx : selectionModel()->selectedIndexes()) {
            if (idx.row() != lastRow) {
                lastRow = idx.row();
                allSelectedRows.insert(lastRow);
            }
        }
        lastRow = -1;
        for (const auto& idx : selected.indexes()) {
            if (idx.row() != lastRow) {
                lastRow = idx.row();
                selectedRows.insert(lastRow);
            }
        }

        allSelectedRows -= selectedRows;
        // determine the current type of selection by looking at
        // the first item in allSelectedRows. In case allSelectedRows
        // is empty, a single item was selected and we are good to go
        if (!allSelectedRows.isEmpty()) {
            const auto baseIdx = model()->index(*allSelectedRows.begin(), 0);
            const auto isSchedule = baseIdx.data(eMyMoney::Model::TransactionScheduleRole).toBool();

            // now scan all in selected to check if they are of the same type
            // and add them to toDeselect if not.
            QItemSelection toDeselect;
            for (const auto& idx : selected.indexes()) {
                if (idx.data(eMyMoney::Model::TransactionScheduleRole).toBool() != isSchedule) {
                    toDeselect.select(idx, idx);
                }
            }
            if (!toDeselect.isEmpty()) {
                selectionModel()->select(toDeselect, QItemSelectionModel::Deselect);
                /// @TODO: may be, we should inform the user why we deselect here
            }
        }
    }

    // build the list of selected journalEntryIds
    // and make sure the first selected is the first listed
    QStringList selectedJournalEntries;
    QStringList selectedSchedules;

    int lastRow = -1;
    bool firstSelectedStillPresent(false);

    for (const auto& idx : selectionModel()->selectedIndexes()) {
        if (idx.row() != lastRow) {
            lastRow = idx.row();
            if (d->firstSelectedId != idx.data(eMyMoney::Model::IdRole).toString()) {
                selectedJournalEntries += idx.data(eMyMoney::Model::IdRole).toString();
            } else {
                firstSelectedStillPresent = true;
            }
            const auto scheduleId = idx.data(eMyMoney::Model::TransactionScheduleIdRole).toString();
            if (!scheduleId.isEmpty()) {
                selectedSchedules += scheduleId;
            }
        }
    }

    // in case we still have the first selected id, we prepend
    // it to the list. Otherwise, if the list is not empty, we
    // use the now first entry to have one in place.
    if (firstSelectedStillPresent && !d->firstSelectedId.isEmpty()) {
        selectedJournalEntries.prepend(d->firstSelectedId);
    } else if (!selectedJournalEntries.isEmpty()) {
        d->firstSelectedId = selectedJournalEntries.first();
    }

    d->selection.setSelection(SelectedObjects::JournalEntry, selectedJournalEntries);
    d->selection.setSelection(SelectedObjects::Schedule, selectedSchedules);
    // in case the selection changes when a reselection is pending
    // we override the pending information with the updated values
    if (d->reselectAfterResetPending) {
        d->selectionBeforeReset = selectedJournalEntries + selectedSchedules;
        d->currentBeforeReset = d->firstSelectedId;
    }
    Q_EMIT transactionSelectionChanged(d->selection);
}

QStringList LedgerView::selectedJournalEntryIds() const
{
    QStringList selection;

    if (selectionModel()) {
        int lastRow = -1;
        QString id;
        for (const auto& idx : selectionModel()->selectedIndexes()) {
            // we don't need to process all columns but only the first one
            if (idx.row() != lastRow) {
                lastRow = idx.row();
                id = idx.data(eMyMoney::Model::IdRole).toString();
                if (!selection.contains(id)) {
                    selection.append(id);
                }
            }
        }
    }
    return selection;
}

void LedgerView::reselectJournalEntry(const QString& journalEntryId)
{
    const auto journalModel = MyMoneyFile::instance()->journalModel();
    const auto baseIdx = journalModel->indexById(journalEntryId);
    auto row = journalModel->mapFromBaseSource(model(), baseIdx).row();
    if (row != -1) {
        setSelectedJournalEntries(QStringList(journalEntryId));
    } else {
        // it could be, that the journal id changed due to a date
        // change. In this case, the transaction id is still the same
        // so we check if we find it.
        const auto newJournalEntryId = journalModel->updateJournalId(journalEntryId);
        if (!newJournalEntryId.isEmpty()) {
            setSelectedJournalEntries(QStringList(newJournalEntryId));
        }
    }
}

void LedgerView::setSelectedJournalEntries(const QStringList& journalEntryIds)
{
    QItemSelection selection;
    const auto journalModel = MyMoneyFile::instance()->journalModel();
    const auto lastColumn = model()->columnCount()-1;
    int startRow = -1;
    int lastRow = -1;
    QModelIndex currentIdx;

    auto createSelectionRange = [&]() {
        if (startRow != -1) {
            selection.select(model()->index(startRow, 0), model()->index(lastRow, lastColumn));
            startRow = -1;
        }
    };

    for (const auto& id : journalEntryIds) {
        if (id.isEmpty())
            continue;
        const auto baseIdx = journalModel->indexById(id);
        auto row = journalModel->mapFromBaseSource(model(), baseIdx).row();

        // the baseIdx may point to a split in a different account which
        // we don't see here. In this case, we scan the journal entries
        // of the transaction
        if ((row == -1) && baseIdx.isValid()) {
            const auto indexes = journalModel->indexesByTransactionId(baseIdx.data(eMyMoney::Model::JournalTransactionIdRole).toString());
            for (const auto& idx : indexes) {
                if (idx.data(eMyMoney::Model::JournalSplitAccountIdRole).toString() == d->accountId) {
                    row = journalModel->mapFromBaseSource(model(), idx).row();
                    if (row != -1) {
                        break;
                    }
                }
            }
            // in case an investment account is selected as destination,
            // it may not have been found. In that case, we check if we find the
            // parent of one of the accounts and use it instead.
            if (row == -1) {
                for (const auto& idx : indexes) {
                    const auto accountId = idx.data(eMyMoney::Model::JournalSplitAccountIdRole).toString();
                    const auto account = MyMoneyFile::instance()->accountsModel()->itemById(accountId);
                    if (account.parentAccountId() == d->accountId) {
                        row = journalModel->mapFromBaseSource(model(), idx).row();
                        if (row != -1) {
                            break;
                        }
                    }
                }
            }
        }

        if (row == -1) {
            qDebug() << "transaction" << id << "not found anymore for selection. skipped";
            continue;
        }

        if (startRow == -1) {
            startRow = row;
            lastRow = row;
            // use the first as the current index
            if (!currentIdx.isValid()) {
                currentIdx = model()->index(startRow, 0);
            }
        } else {
            if (row == lastRow+1) {
                lastRow = row;
            } else {
                // a new range start, so we take care of it
                createSelectionRange();
                startRow = row;
                lastRow = row;
            }
        }
    }

    // if no selection has been setup but we have
    // transactions in the ledger, we select the
    // last. The very last entry is the empty line,
    // so we have to skip that.
    if ((lastRow == -1) && (model()->rowCount() > 1)) {
        // find the last 'real' transaction
        startRow = model()->rowCount()-1;
        do {
            --startRow;
            currentIdx = model()->index(startRow, 0);
        } while (startRow > 0 && journalModel->baseModel(currentIdx) != journalModel);
        lastRow = startRow;
    }

    // add a possibly dangling range
    createSelectionRange();

    selectionModel()->setCurrentIndex(currentIdx, QItemSelectionModel::NoUpdate);
    selectionModel()->select(selection, QItemSelectionModel::ClearAndSelect);
}

void LedgerView::selectAllTransactions()
{
    QItemSelection selection;
    const auto journalModel = MyMoneyFile::instance()->journalModel();
    int startRow = -1;
    int lastRow = -1;
    const auto lastColumn = model()->columnCount() - 1;
    const auto rows = model()->rowCount();

    auto createSelectionRange = [&]() {
        if (startRow != -1) {
            selection.select(model()->index(startRow, 0), model()->index(lastRow, lastColumn));
            startRow = -1;
        }
    };

    for (auto row = 0; row < rows; ++row) {
        const auto idx = model()->index(row, 0);
        if (!idx.data(eMyMoney::Model::JournalTransactionIdRole).toString().isEmpty()) {
            auto baseIdx = journalModel->mapToBaseSource(idx);
            if (baseIdx.model() == journalModel) {
                if (startRow == -1) {
                    startRow = row;
                    lastRow = row;
                } else {
                    if (row == (lastRow + 1)) {
                        lastRow = row;
                    } else {
                        // a new range start, so we take care of it
                        createSelectionRange();
                    }
                }
            } else {
                // a range ends, so we take care of it
                createSelectionRange();
            }
        } else {
            // a range ends, so we take care of it
            createSelectionRange();
        }
    }
    // add a possibly dangling range
    createSelectionRange();

    selectionModel()->select(selection, QItemSelectionModel::ClearAndSelect);
}

void LedgerView::slotMoveToAccount(const QString& accountId)
{
    // close the menu, if it is still open
    if (pMenus[eMenu::Menu::Transaction]->isVisible()) {
        pMenus[eMenu::Menu::Transaction]->close();
    }

    pActions[eMenu::Action::MoveTransactionTo]->setData(accountId);
    pActions[eMenu::Action::MoveTransactionTo]->activate(QAction::Trigger);
}

void LedgerView::resizeSection(QWidget* view, const QString& configGroupName, int section, int oldSize, int newSize)
{
    if (view == this) {
        return;
    }

    if (d->columnSelector->configGroupName() == configGroupName) {
        if (oldSize == 0 && newSize > 0) {
            setColumnHidden(section, false);
        } else if (oldSize > 0 && newSize == 0) {
            setColumnHidden(section, true);
        }
        if (newSize > 0) {
            QSignalBlocker blocker(horizontalHeader());
            horizontalHeader()->resizeSection(section, newSize);
            QMetaObject::invokeMethod(this, "adjustDetailColumn", Qt::QueuedConnection, Q_ARG(int, viewport()->width()), Q_ARG(bool, false));
        }
    }
}

void LedgerView::moveSection(QWidget* view, int section, int oldIndex, int newIndex)
{
    Q_UNUSED(section)
    if (view == this) {
        return;
    }

    QSignalBlocker block(horizontalHeader());
    horizontalHeader()->moveSection(oldIndex, newIndex);
}

void LedgerView::setSortOrder(LedgerSortOrder sortOrder)
{
    d->sortOrder = sortOrder;
    auto sortModel = qobject_cast<LedgerSortProxyModel*>(model());
    if (sortModel) {
        sortModel->setLedgerSortOrder(sortOrder);
    }
}

void LedgerView::setFocus()
{
    // in case the editor is open, forward the focus
    // to the editor. otherwise, we take it.
    if (d->editor) {
        d->editor->setFocus();
    } else {
        QTableView::setFocus();
    }
}

void LedgerView::setSelectOnly(bool selectOnly)
{
    d->selectOnly = selectOnly;
}
