/*
    SPDX-FileCopyrightText: 2003, 2004 George Staikos <staikos@kde.org>

    SPDX-License-Identifier: GPL-2.0-or-later
*/

#include "kwmapeditor.h"

#include <QAction>
#include <KActionCollection>
#include <QIcon>
#include <KLocalizedString>
#include <QMenu>
#include <KStandardAction>
#include <KWindowSystem>
#include <QTextEdit>

#include <QApplication>
#include <QClipboard>
#include <QItemDelegate>
#include <QFocusEvent>
#include <QKeyEvent>
#include <QPointer>
#include <QToolButton>

class InlineEditor : public QTextEdit
{
public:
    InlineEditor(KWMapEditor *p) : QTextEdit(), _p(p)
    {
        setAttribute(Qt::WA_DeleteOnClose);
        setWindowFlags(Qt::Widget | Qt::FramelessWindowHint);
        connect(p, &QObject::destroyed, this, &QWidget::close);
    }

protected:
    void focusOutEvent(QFocusEvent *e) override
    {
        if (e->reason() == Qt::PopupFocusReason) {
            // TODO: It seems we only get here if we're disturbed
            // by our own popup. this needs some clearance though.
            return;
        }

        close();
    }
    void keyPressEvent(QKeyEvent *e) override
    {
        if (e->key() == Qt::Key_Escape) {
            e->accept();
            close();
        } else {
            e->ignore();
            QTextEdit::keyPressEvent(e);
        }
    }
    void contextMenuEvent(QContextMenuEvent *event) override
    {
        QMenu *menu = createStandardContextMenu();
        popup = menu;
        popup->exec(event->globalPos());
        delete popup;
    }
    QPointer<KWMapEditor> _p;
    QPointer<QMenu> popup;
};

class KWMapEditorDelegate : public QItemDelegate
{
public:
    KWMapEditorDelegate(KWMapEditor *parent) : QItemDelegate(parent)
    {
    }

    QWidget *createEditor(QWidget *parentWidget, const QStyleOptionViewItem &option, const QModelIndex &index) const override
    {
        if (index.column() != 2) {
            return QItemDelegate::createEditor(parentWidget, option, index);
        }

        auto mapEditor = static_cast<KWMapEditor *>(parent());
        return new InlineEditor(mapEditor);
    }

    void updateEditorGeometry(QWidget *editor, const QStyleOptionViewItem &option, const QModelIndex &index) const override
    {
        if (dynamic_cast<InlineEditor *>(editor)) {
            auto mapEditor = static_cast<KWMapEditor *>(parent());
            const QRect geo = mapEditor->visualRect(index);
            editor->move(mapEditor->mapToGlobal(geo.topLeft()));
            editor->resize(geo.width(), geo.height() * 3);
        } else {
            QItemDelegate::updateEditorGeometry(editor, option, index);
        }
    }

    void setEditorData(QWidget *editor, const QModelIndex &index) const override
    {
        auto e = dynamic_cast<InlineEditor *>(editor);
        if (e) {
            auto mapEditor = static_cast<KWMapEditor *>(parent());
            e->setText(mapEditor->item(index.row(), index.column())->text());
        } else {
            QItemDelegate::setEditorData(editor, index);
        }
    }

    void setModelData(QWidget *editor, QAbstractItemModel *model, const QModelIndex &index) const override
    {
        auto e = dynamic_cast<InlineEditor *>(editor);
        if (e) {
            auto mapEditor = static_cast<KWMapEditor *>(parent());
            mapEditor->item(index.row(), index.column())->setText(e->toPlainText());
        } else {
            QItemDelegate::setModelData(editor, model, index);
        }
    }
};

KWMapEditor::KWMapEditor(QMap<QString, QString> &map, QWidget *parent)
    : QTableWidget(0, 3, parent), _map(map)
{
    setItemDelegate(new KWMapEditorDelegate(this));
    _ac = new KActionCollection(this);
    _copyAct = KStandardAction::copy(this, &KWMapEditor::copy, _ac);
    connect(this, &KWMapEditor::itemChanged, this, &KWMapEditor::dirty);
    connect(this, &KWMapEditor::customContextMenuRequested, this, &KWMapEditor::contextMenu);
    setSelectionMode(NoSelection);
    setHorizontalHeaderLabels(QStringList() << QString() << i18n("Key") << i18n("Value"));
    setContextMenuPolicy(Qt::CustomContextMenu);
    reload();
}

void KWMapEditor::reload()
{
    int row = 0;

    while ((row = rowCount()) > _map.count()) {
        removeRow(row - 1);
    }

    if ((row = rowCount()) < _map.count()) {
        setRowCount(_map.count());
        for (int x = row; x < rowCount(); ++x) {
            auto b = new QToolButton(this);
            b->setIcon(QIcon::fromTheme(QStringLiteral("edit-delete")));
            b->setToolTip(i18n("Delete Entry"));
            connect(b, &QToolButton::clicked, this, &KWMapEditor::erase);
            setCellWidget(x, 0, b);
            if (columnWidth(0) != b->sizeHint().width()) {
                setColumnWidth(0, b->sizeHint().width());
            }
            setItem(x, 1, new QTableWidgetItem());
            setItem(x, 2, new QTableWidgetItem());
        }
    }

    row = 0;
    for (QMap<QString, QString>::Iterator it = _map.begin(), end = _map.end(); it != end; ++it) {
        item(row, 1)->setText(it.key());
        item(row, 2)->setText(it.value());
        row++;
    }
}

KWMapEditor::~KWMapEditor() = default;

void KWMapEditor::erase()
{
    const QObject *o = sender();
    for (int i = 0; i < rowCount(); i++) {
        if (cellWidget(i, 0) == o) {
            removeRow(i);
            break;
        }
    }

    Q_EMIT dirty();
}

void KWMapEditor::saveMap()
{
    _map.clear();

    for (int i = 0; i < rowCount(); i++) {
        _map[item(i, 1)->text()] = item(i, 2)->text();
    }
}

void KWMapEditor::addEntry()
{
    int x = rowCount();
    insertRow(x);
    auto b = new QToolButton(this);
    b->setIcon(QIcon::fromTheme(QStringLiteral("edit-delete")));
    b->setToolTip(i18n("Delete Entry"));
    connect(b, &QToolButton::clicked, this, &KWMapEditor::erase);
    setCellWidget(x, 0, b);
    setItem(x, 1, new QTableWidgetItem());
    setItem(x, 2, new QTableWidgetItem());
    scrollToItem(item(x, 1));
    setCurrentCell(x, 1);
    Q_EMIT dirty();
}

void KWMapEditor::emitDirty()
{
    Q_EMIT dirty();
}

void KWMapEditor::contextMenu(const QPoint &pos)
{
    QTableWidgetItem *twi = itemAt(pos);
    _contextRow = row(twi);
    auto m = new QMenu(this);
    m->addAction(i18n("&New Entry"), this, &KWMapEditor::addEntry);
    m->addAction(_copyAct);
    m->exec(mapToGlobal(pos));
    delete m;
}

void KWMapEditor::copy()
{
    QTableWidgetItem *twi = item(_contextRow, 2);
    if (twi) {
        QApplication::clipboard()->setText(twi->text());
    }
}

#include "moc_kwmapeditor.cpp"
