/*
    SPDX-FileCopyrightText: 2025 Dennis Lübke <kde@dennis2society.de>
    SPDX-License-Identifier: LGPL-2.0-or-later
*/
#include <KLocalizedString>
#include <KPluginFactory>
#include <KTextEditor/Application>
#include <KTextEditor/Editor>
#include <KTextEditor/MainWindow>
#include <QColor>
#include <QDir>
#include <QFileDialog>
#include <QFileInfo>
#include <QLayout>
#include <QMainWindow>
#include <QMessageBox>
#include <QPalette>
#include <QScrollArea>
#include <QScrollBar>
#include <QStatusBar>
#include <QTableWidgetItem>
#include <QUrl>

#include "gpgkeydetails.hpp"
#include "kategpgplugin.hpp"

K_PLUGIN_FACTORY_WITH_JSON(KateGPGPluginFactory, "kategpgplugin.json", registerPlugin<KateGPGPlugin>();)

KateGPGPlugin::KateGPGPlugin(QObject *parent, const QList<QVariant> &)
    : KTextEditor::Plugin(parent)
{
}

QMap<KTextEditor::Document *, DocumentUIState> &KateGPGPlugin::documentStates()
{
    return m_documentStates;
}

void KateGPGPlugin::notifyEncryptionStateChanged(KTextEditor::Document *doc)
{
    Q_EMIT documentEncryptionStateChanged(doc);
}

QObject *KateGPGPlugin::createView(KTextEditor::MainWindow *mainWindow)
{
    return new KateGPGPluginView(this, mainWindow);
}

KateGPGPluginView::~KateGPGPluginView()
{
    if (m_encryptionStatusLabel) {
        if (auto *mainWin = qobject_cast<QMainWindow *>(m_mainWindow->window())) {
            mainWin->statusBar()->removeWidget(m_encryptionStatusLabel);
        }
        delete m_encryptionStatusLabel;
        m_encryptionStatusLabel = nullptr;
    }
}

KateGPGPluginView::KateGPGPluginView(KateGPGPlugin *plugin, KTextEditor::MainWindow *mainwindow)
    : m_mainWindow(mainwindow)
    , m_plugin(plugin)
{
    m_gpgWrapper = new GPGMeWrapper();
    m_toolview.reset(m_mainWindow->createToolView(plugin, // pointer to plugin
                                                  QStringLiteral("gpgPlugin"), // just an identifier for the toolview
                                                  KTextEditor::MainWindow::Left, // we want to create a toolview on the
                                                                                 // left side
                                                  QIcon::fromTheme(QStringLiteral("security-medium")),
                                                  i18n("GPG Plugin"))); // User visible name of the toolview, i18n means it
                                                                        // will be available for translation
    m_toolview->setMinimumHeight(700);

    // BUTTONS!
    m_gpgDecryptButton = new QPushButton(i18n("GPG Decrypt current document"));
    m_gpgEncryptButton = new QPushButton(i18n("GPG Encrypt current document"));

    // Lots of initialization and setting parameters for Qt UI stuff
    m_verticalLayout = new QVBoxLayout();
    m_titleLabel = new QLabel(i18n("<b>GPG Plugin Settings</b>"));
    m_titleLabel->setSizePolicy(QSizePolicy::Maximum, QSizePolicy::Fixed);
    m_preferredEmailAddress = QLatin1String("");
    m_preferredGPGKeyID = i18n("Key ID");
    m_preferredEmailAddressLabel = new QLabel(i18n("A search string used to filter keys by available email addresses"));
    m_preferredEmailAddressLabel->setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Fixed);
    m_preferredEmailLineEdit = new QLineEdit(m_preferredEmailAddress);
    m_preferredGPGKeyIDLabel = new QLabel(i18n("Selected GPG Key finerprint for encryption"));
    m_EmailAddressSelectLabel = new QLabel(i18n("<b>To: Email address used for encryption</b>"));
    m_preferredGPGKeyIDLabel->setSizePolicy(QSizePolicy::Maximum, QSizePolicy::Fixed);
    m_EmailAddressSelectLabel->setSizePolicy(QSizePolicy::Maximum, QSizePolicy::Fixed);

    m_preferredEmailAddressComboBox = new QComboBox();

    m_selectedKeyIndexEdit = new QLineEdit(m_preferredGPGKeyID);
    m_selectedKeyIndexEdit->setReadOnly(true);
    m_preferredEmailAddressComboBox->setToolTip(
        i18n("Select an email address to which to encrypt.\n"
             "Only mail addresses associated with your currently selected\n"
             "key fingerprint are available."));
    m_selectedKeyIndexEdit->setToolTip(
        i18n("This is your currently selected GPG key fingerprint that will be used "
             "for encryption."));

    m_symmetricEncryptioCheckbox = new QCheckBox(i18n("Enable symmetric encryption"));
    m_symmetricEncryptioCheckbox->setChecked(false);

    m_showOnlyPrivateKeysCheckbox = new QCheckBox(i18n("Show only keys for which a private key is available"));
    m_showOnlyPrivateKeysCheckbox->setChecked(true);

    m_hideExpiredKeysCheckbox = new QCheckBox(i18n("Hide Expired Keys"));
    m_hideExpiredKeysCheckbox->setChecked(true);

    m_gpgKeyTable = new QTableWidget(m_gpgWrapper->getNumKeys(), 5, m_toolview.get());
    m_gpgKeyTable->setSelectionBehavior(QAbstractItemView::SelectRows);

    // we want the settings stuff in QScrollArea
    QScrollArea *scrollArea = new QScrollArea(m_toolview.get());
    scrollArea->setWidgetResizable(true);
    scrollArea->setMinimumHeight(700);
    scrollArea->setVerticalScrollBarPolicy(Qt::ScrollBarAlwaysOn);
    scrollArea->setAlignment(Qt::AlignTop);

    QWidget *w = new QWidget(m_toolview.get());
    w->setLayout(m_verticalLayout);
    scrollArea->setWidget(w);
    m_toolview->layout()->addWidget(scrollArea);
    m_verticalLayout->addWidget(m_titleLabel);
    m_verticalLayout->addWidget(m_gpgDecryptButton);
    m_verticalLayout->addWidget(m_gpgEncryptButton);
    m_verticalLayout->addWidget(m_symmetricEncryptioCheckbox);
    m_verticalLayout->addWidget(m_preferredEmailAddressLabel);
    m_verticalLayout->addWidget(m_preferredEmailLineEdit);
    m_verticalLayout->addWidget(m_EmailAddressSelectLabel);
    m_verticalLayout->addWidget(m_preferredEmailAddressComboBox);
    m_verticalLayout->addWidget(m_preferredGPGKeyIDLabel);
    m_verticalLayout->addWidget(m_selectedKeyIndexEdit);
    m_verticalLayout->addWidget(m_showOnlyPrivateKeysCheckbox);
    m_verticalLayout->addWidget(m_hideExpiredKeysCheckbox);
    m_verticalLayout->addWidget(m_gpgKeyTable);

    m_verticalLayout->insertStretch(-1, 1);

    connect(m_gpgKeyTable, &QTableWidget::itemSelectionChanged, this, &KateGPGPluginView::onTableViewSelection);
    connect(m_preferredEmailLineEdit, &QLineEdit::textChanged, this, &KateGPGPluginView::onPreferredEmailAddressChanged);
#if QT_VERSION < QT_VERSION_CHECK(6, 7, 0)
    connect(m_showOnlyPrivateKeysCheckbox, &QCheckBox::stateChanged, this, &KateGPGPluginView::onShowOnlyPrivateKeysChanged);
    connect(m_hideExpiredKeysCheckbox, &QCheckBox::stateChanged, this, &KateGPGPluginView::onHideExpiredKeysChanged);
#else
    connect(m_showOnlyPrivateKeysCheckbox, &QCheckBox::checkStateChanged, this, &KateGPGPluginView::onShowOnlyPrivateKeysChanged);
    connect(m_hideExpiredKeysCheckbox, &QCheckBox::checkStateChanged, this, &KateGPGPluginView::onHideExpiredKeysChanged);
#endif
    connect(m_gpgDecryptButton, &QPushButton::released, this, &KateGPGPluginView::decryptButtonPressed);
    connect(m_gpgEncryptButton, &QPushButton::released, this, &KateGPGPluginView::encryptButtonPressed);
    // hook into open/save dialog
    connect(mainwindow, &KTextEditor::MainWindow::viewCreated, this, [this](KTextEditor::View *view) {
        connectToOpenAndSaveDialog(view);
    });
    // update UI state when the active tab changes
    connect(mainwindow, &KTextEditor::MainWindow::viewChanged, this, &KateGPGPluginView::onViewChanged);
    // refresh the encryption status label in this window whenever any window
    // changes a document's encryption state
    connect(plugin, &KateGPGPlugin::documentEncryptionStateChanged, this, [this](KTextEditor::Document *doc) {
        if (doc == m_currentDocument) {
            updateEncryptionStatusLabel(doc);
        }
    });
    // initialise m_currentDocument from whatever is already open
    if (KTextEditor::View *activeView = mainwindow->activeView()) {
        m_currentDocument = activeView->document();
    }
    updateKeyTable();

    // Create the encryption status indicator in Kate's main window status bar
    if (auto *mainWin = qobject_cast<QMainWindow *>(m_mainWindow->window())) {
        m_encryptionStatusLabel = new QLabel();
        m_encryptionStatusLabel->setAutoFillBackground(true);
        m_encryptionStatusLabel->setVisible(false);
        mainWin->statusBar()->addPermanentWidget(m_encryptionStatusLabel);
    }
    updateEncryptionStatusLabel(m_currentDocument);
}

void KateGPGPluginView::onPreferredEmailAddressChanged()
{
    Q_EMIT m_gpgKeyTable->itemSelectionChanged();
    m_preferredEmailAddress = m_preferredEmailLineEdit->text();
    updateKeyTable();
}

void KateGPGPluginView::onShowOnlyPrivateKeysChanged()
{
    Q_EMIT m_gpgKeyTable->itemSelectionChanged();
    m_preferredEmailAddress = m_preferredEmailLineEdit->text();
    updateKeyTable();
}

void KateGPGPluginView::onHideExpiredKeysChanged()
{
    Q_EMIT m_gpgKeyTable->itemSelectionChanged();
    m_preferredEmailAddress = m_preferredEmailLineEdit->text();
    updateKeyTable();
}

QVariantMap KateGPGPluginView::generateMessage(const QString translatebleMessage, const QString messageType)
{
    QVariantMap message;
    message[QStringLiteral("text")] = translatebleMessage;
    message[QStringLiteral("type")] = messageType;
    message[QStringLiteral("categoryIcon")] = QIcon::fromTheme(QStringLiteral("dialog-warning"));
    return message;
}

void KateGPGPluginView::updateEncryptionStatusLabel(KTextEditor::Document *doc)
{
    if (!m_encryptionStatusLabel) {
        return;
    }
    if (!doc || !m_plugin->documentStates().contains(doc)) {
        m_encryptionStatusLabel->setVisible(false);
        return;
    }
    if (m_plugin->documentStates().value(doc).isDecrypted) {
        m_encryptionStatusLabel->setText(i18n("  Decrypted  "));
        QPalette pal = m_encryptionStatusLabel->palette();
        pal.setColor(QPalette::Window, QColor(QStringLiteral("darkorange")));
        pal.setColor(QPalette::WindowText, Qt::white);
        m_encryptionStatusLabel->setPalette(pal);
    } else {
        m_encryptionStatusLabel->setText(i18n("  Encrypted  "));
        QPalette pal = m_encryptionStatusLabel->palette();
        pal.setColor(QPalette::Window, QColor(QStringLiteral("darkgreen")));
        pal.setColor(QPalette::WindowText, Qt::white);
        m_encryptionStatusLabel->setPalette(pal);
    }
    m_encryptionStatusLabel->setVisible(true);
}

void KateGPGPluginView::onViewChanged(KTextEditor::View *v)
{
    if (!v) {
        m_currentDocument = nullptr;
        return;
    }

    KTextEditor::Document *newDoc = v->document();

    // Save UI state for the document we are leaving
    if (m_currentDocument && m_currentDocument != newDoc && m_plugin->documentStates().contains(m_currentDocument)) {
        DocumentUIState state;
        state.symmetricEncryption = m_symmetricEncryptioCheckbox->isChecked();
        state.selectedRowIndex = m_selectedRowIndex;
        state.selectedFingerprint = m_selectedKeyIndexEdit->text();
        state.selectedEmailAddress = m_preferredEmailAddressComboBox->currentText();
        // Preserve the isDecrypted flag — it is not tied to any UI widget
        if (m_plugin->documentStates().contains(m_currentDocument)) {
            state.isDecrypted = m_plugin->documentStates()[m_currentDocument].isDecrypted;
        }
        m_plugin->documentStates()[m_currentDocument] = state;
    }

    m_currentDocument = newDoc;

    // Restore UI state for the document we are switching to (if it has saved state)
    if (m_plugin->documentStates().contains(newDoc)) {
        const DocumentUIState &state = m_plugin->documentStates()[newDoc];

        m_symmetricEncryptioCheckbox->setChecked(state.symmetricEncryption);
        m_selectedRowIndex = state.selectedRowIndex;

        // Restore key table selection by fingerprint.
        // Block signals so onTableViewSelection is not triggered mid-restore.
        m_gpgKeyTable->blockSignals(true);
        for (int i = 0; i < m_gpgKeyTable->rowCount(); ++i) {
            QTableWidgetItem *item = m_gpgKeyTable->item(i, 0);
            if (item && item->text() == state.selectedFingerprint) {
                m_gpgKeyTable->selectRow(i);
                break;
            }
        }
        m_gpgKeyTable->blockSignals(false);

        // Repopulate the email combo for the restored key selection, then
        // re-apply the stored email choice.
        onTableViewSelection();
        const int idx = m_preferredEmailAddressComboBox->findText(state.selectedEmailAddress);
        if (idx >= 0) {
            m_preferredEmailAddressComboBox->setCurrentIndex(idx);
        }
    }
    updateEncryptionStatusLabel(m_currentDocument);
}

void KateGPGPluginView::connectToOpenAndSaveDialog(KTextEditor::View *view)
{
    KTextEditor::Document *doc = view->document();
    connect(doc, &KTextEditor::Document::aboutToSave, this, &KateGPGPluginView::onDocumentWillSave, Qt::UniqueConnection);
    // Clean up shared plugin state and per-view current-document reference
    // when the document is closed.  The remove() is idempotent so it is safe
    // for multiple windows to have this connection for the same document.
    connect(doc, &QObject::destroyed, this, [this, doc]() {
        m_plugin->documentStates().remove(doc);
        if (m_currentDocument == doc) {
            m_currentDocument = nullptr;
        }
    });
    onDocumentOpened(view);
}

void KateGPGPluginView::onDocumentOpened(KTextEditor::View *view)
{
    KTextEditor::Document *doc = view->document();
    if (!(doc->url().fileName().endsWith(QLatin1String(".gpg"), Qt::CaseInsensitive)
          || doc->url().fileName().endsWith(QLatin1String(".asc"), Qt::CaseInsensitive))
        || !m_gpgWrapper->isEncrypted(doc->text())) {
        return;
    }

    const QString fingerprint = m_selectedKeyIndexEdit->text();
    if (fingerprint.isEmpty()) {
        m_mainWindow->showMessage(generateMessage(i18n("Error Decrypting Text! No fingerprint selected..."), QStringLiteral("Error")));
        return;
    }

    GPGOperationResult res = m_gpgWrapper->decryptString(doc->text(), fingerprint);
    if (!res.keyFound) {
        m_mainWindow->showMessage(generateMessage(i18n("Error Decrypting Text!\n"
                                                       "No matching fingerprint found!\n"
                                                       "Or this is not a GPG "
                                                       "encrypted text..."),
                                                  QStringLiteral("Error")));
        return;
    }
    if (!res.decryptionSuccess) {
        m_mainWindow->showMessage(generateMessage(i18n("Error Decrypting Text!\n") + res.errorMessage, QStringLiteral("Error")));
        return;
    }

    // The per-document UI state is stored in the plugin's shared map so that
    // onViewChanged can restore it cleanly once this tab becomes active,
    // without corrupting the state of whichever tab was previously active,
    // and so that a second window opening the same document sees the correct state.
    doc->setText(res.resultString);

    DocumentUIState state;
    state.symmetricEncryption = res.wasSymmetric;

    // Find the table row that matches the key used for decryption
    for (int i = 0; i < m_gpgKeyTable->rowCount(); ++i) {
        QTableWidgetItem *detailsItem = m_gpgKeyTable->item(i, 4);
        if (detailsItem && detailsItem->text().contains(res.keyIDUsedForDecryption)) {
            state.selectedRowIndex = i;
            QTableWidgetItem *fpItem = m_gpgKeyTable->item(i, 0);
            if (fpItem) {
                state.selectedFingerprint = fpItem->text();
            }
            break;
        }
    }

    state.isDecrypted = true;
    m_plugin->documentStates()[doc] = state;
    m_plugin->notifyEncryptionStateChanged(doc);
}

void KateGPGPluginView::onDocumentWillSave(KTextEditor::Document *doc)
{
    // Called right before save
    if (!doc->url().fileName().endsWith(QLatin1String(".gpg"), Qt::CaseInsensitive)
        && !doc->url().fileName().endsWith(QLatin1String(".asc"), Qt::CaseInsensitive)) {
        return;
    }
    if (m_gpgWrapper->isEncrypted(doc->text())) {
        // Document is already encrypted (e.g. the Encrypt button was just used).
        // Let the save proceed with the existing ciphertext — no re-encryption needed.
        return;
    }

    // Multi-window guard: when the same document is open in multiple Kate windows
    // every window's aboutToSave connection fires on save.  Prefer the window that
    // currently has the document on its active tab — its live widget values are
    // authoritative.  If no window has it active the first handler wins; the second
    // sees an already-encrypted document and exits early via the check above.
    if (m_currentDocument != doc) {
        const auto mainWindows = KTextEditor::Editor::instance()->application()->mainWindows();
        for (KTextEditor::MainWindow *mw : mainWindows) {
            if (mw != m_mainWindow) {
                if (KTextEditor::View *av = mw->activeView()) {
                    if (av->document() == doc) {
                        return; // Another window has the document active; defer to it.
                    }
                }
            }
        }
    }

    // Retrieve the UI state for this specific document.
    // If it is the currently active document the live widget values are used;
    // otherwise the previously stored state is used.
    QString fingerprint;
    QString emailAddress;
    bool ascii = true;
    bool symmetric = false;

    if (m_currentDocument == doc) {
        fingerprint = m_selectedKeyIndexEdit->text();
        emailAddress = m_preferredEmailAddressComboBox->currentText();
        symmetric = m_symmetricEncryptioCheckbox->isChecked();
    } else if (m_plugin->documentStates().contains(doc)) {
        const DocumentUIState &state = m_plugin->documentStates()[doc];
        fingerprint = state.selectedFingerprint;
        emailAddress = state.selectedEmailAddress;
        symmetric = state.symmetricEncryption;
    }

    if (fingerprint.isEmpty() && !symmetric) {
        m_mainWindow->showMessage(generateMessage(i18n("Error Encrypting Text!\nNo fingerprint selected..."), QStringLiteral("Error")));
        return;
    }

    GPGOperationResult res = m_gpgWrapper->encryptString(doc->text(), fingerprint, emailAddress, ascii, symmetric);
    if (!res.keyFound) {
        m_mainWindow->showMessage(
            generateMessage(i18n("Error Encrypting Text! No Matching Fingerprint found...\n") + res.errorMessage, QStringLiteral("Error")));
        return;
    }
    if (!res.decryptionSuccess) {
        m_mainWindow->showMessage(generateMessage(i18n("Error Encrypting Text!") + res.errorMessage, QStringLiteral("Error")));
        return;
    }
    doc->setText(res.resultString);
    m_plugin->documentStates()[doc].isDecrypted = false;
    m_plugin->notifyEncryptionStateChanged(doc);
}

void KateGPGPluginView::decryptButtonPressed()
{
    decryptView(m_mainWindow->activeView());
}

void KateGPGPluginView::decryptView(KTextEditor::View *v)
{
    if (!v) {
        m_mainWindow->showMessage(generateMessage(i18n("Error! No views available..."), QStringLiteral("Error")));
        return;
    }
    if (!v || !v->document() || v->document()->isEmpty()) {
        m_mainWindow->showMessage(generateMessage(i18n("Error Decrypting Text! Document is empty..."), QStringLiteral("Error")));
        return;
    }
    if (m_selectedKeyIndexEdit->text().isEmpty()) {
        m_mainWindow->showMessage(generateMessage(i18n("Error Decrypting Text! No fingerprint selected..."), QStringLiteral("Error")));
        return;
    }
    GPGOperationResult res = m_gpgWrapper->decryptString(v->document()->text(), m_selectedKeyIndexEdit->text());
    if (!res.keyFound) {
        m_mainWindow->showMessage(generateMessage(i18n("Error Decrypting Text!\n"
                                                       "No matching fingerprint found!\n"
                                                       "Or this is not a GPG "
                                                       "encrypted text..."),
                                                  QStringLiteral("Error")));
        return;
    }
    if (!res.decryptionSuccess) {
        m_mainWindow->showMessage(generateMessage(i18n("Error Decrypting Text!\n") + res.errorMessage, QStringLiteral("Error")));
        return;
    }
    v->document()->setText(res.resultString);
    // Mirror the encryption method used: check symmetric for symmetric files,
    // uncheck it for public-key encrypted files.
    m_symmetricEncryptioCheckbox->setChecked(res.wasSymmetric);
    // Search for decryption key ID in available keys
    // and autoselect corresponding row upon finding the correct one.
    for (auto i = 0; i < m_gpgKeyTable->rowCount(); ++i) {
        QTableWidgetItem *detailsItem = m_gpgKeyTable->item(i, 4);
        QString detailsString = detailsItem->text();
        if (detailsString.contains(res.keyIDUsedForDecryption)) {
            m_selectedRowIndex = i;
            m_gpgKeyTable->selectRow(i);
            break;
        }
    }
    m_plugin->documentStates()[v->document()].isDecrypted = true;
    m_plugin->notifyEncryptionStateChanged(v->document());
}

void KateGPGPluginView::encryptButtonPressed()
{
    KTextEditor::View *v = m_mainWindow->activeView();
    if (!v) {
        m_mainWindow->showMessage(generateMessage(i18n("Error! No views available..."), QStringLiteral("Error")));
        return;
    }

    if (!v || !v->document()) {
        m_mainWindow->showMessage(generateMessage(i18n("Error Encrypting Text! No document available..."), QStringLiteral("Error")));
        return;
    }
    if (v->document()->text().isEmpty()) {
        m_mainWindow->showMessage(generateMessage(i18n("Error Encrypting Text! Document is empty..."), QStringLiteral("Error")));
        return;
    }
    if (m_selectedKeyIndexEdit->text().isEmpty()) {
        m_mainWindow->showMessage(generateMessage(i18n("Error Encrypting Text!\nNo fingerprint selected..."), QStringLiteral("Error")));
        return;
    }
    if (m_gpgWrapper->isEncrypted(v->document()->text())) {
        m_mainWindow->showMessage(generateMessage(i18n("Attempted double encryption detected! Encrypting twice "
                                                       "is disabled for now..."),
                                                  QStringLiteral("Warning")));
        return;
    }

    // If the file has no .gpg/.asc extension, ask the user for a target filename
    // before doing anything — so cancelling leaves the document untouched.
    bool needsSaveAs = false;
    QString saveAsPath;
    const QString docFileName = v->document()->url().fileName();
    if (!docFileName.endsWith(QLatin1String(".gpg"), Qt::CaseInsensitive) && !docFileName.endsWith(QLatin1String(".asc"), Qt::CaseInsensitive)) {
        const QString currentPath = v->document()->url().toLocalFile();
        const QString startDir = currentPath.isEmpty() ? QDir::homePath() : QFileInfo(currentPath).absolutePath();
        QString suggested = v->document()->url().fileName();
        if (suggested.isEmpty()) {
            suggested = QStringLiteral("untitled");
        }
        suggested += QStringLiteral(".gpg");

        saveAsPath = QFileDialog::getSaveFileName(m_toolview.get(),
                                                  i18n("Save Encrypted File As"),
                                                  startDir + QDir::separator() + suggested,
                                                  i18n("GPG Files (*.gpg *.asc)"));
        if (saveAsPath.isEmpty()) {
            return; // user cancelled — do not encrypt
        }
        if (!saveAsPath.endsWith(QLatin1String(".gpg"), Qt::CaseInsensitive) && !saveAsPath.endsWith(QLatin1String(".asc"), Qt::CaseInsensitive)) {
            saveAsPath += QStringLiteral(".gpg");
        }
        needsSaveAs = true;
    }

    GPGOperationResult res = m_gpgWrapper->encryptString(v->document()->text(),
                                                         m_selectedKeyIndexEdit->text(),
                                                         m_preferredEmailAddressComboBox->itemText(m_preferredEmailAddressComboBox->currentIndex()),
                                                         true,
                                                         m_symmetricEncryptioCheckbox->isChecked());
    if (!res.keyFound) {
        m_mainWindow->showMessage(
            generateMessage(i18n("Error Encrypting Text! No Matching Fingerprint found...\n") + res.errorMessage, QStringLiteral("Error")));
        return;
    }
    if (!res.decryptionSuccess) {
        m_mainWindow->showMessage(generateMessage(i18n("Error Encrypting Text!") + res.errorMessage, QStringLiteral("Error")));
        return;
    }
    v->document()->setText(res.resultString);
    m_plugin->documentStates()[v->document()].isDecrypted = false;
    m_plugin->notifyEncryptionStateChanged(v->document());
    if (needsSaveAs) {
        v->document()->saveAs(QUrl::fromLocalFile(saveAsPath));
    } else {
        v->document()->save();
    }
}

void KateGPGPluginView::onTableViewSelection()
{
    /**
     * Thanks to sorting the table by creation date, we will here
     * search for the selected table row by key fingerprint in the
     * list of available GPG keys.
     */
    m_preferredEmailAddressComboBox->clear();
    m_gpgWrapper->loadKeys(m_showOnlyPrivateKeysCheckbox->isChecked(), m_hideExpiredKeysCheckbox->isChecked(), m_preferredEmailLineEdit->text());
    QModelIndexList selectedList = m_gpgKeyTable->selectionModel()->selectedRows();
    // Currently it is possible to select multiple rows in the QTableWidget.
    // For now we will only consider the first selected row.
    if (selectedList.size() > 0) {
        m_selectedRowIndex = selectedList.at(0).row();
        const QString selectedFingerPrint(m_gpgKeyTable->item(m_selectedRowIndex, 0)->text());
        const QVector<GPGKeyDetails> keys = m_gpgWrapper->getKeys();
        if (m_selectedRowIndex <= keys.size()) {
            for (auto key = m_gpgWrapper->getKeys().begin(); key != m_gpgWrapper->getKeys().end(); ++key) {
                GPGKeyDetails keyDetail = *key;
                if (selectedFingerPrint == keyDetail.fingerPrint()) {
                    const QVector<QString> mailAddresses = keyDetail.mailAddresses();
                    for (auto &r : mailAddresses) {
                        m_preferredEmailAddressComboBox->addItem(r);
                    }
                    m_selectedKeyIndexEdit->setText(keyDetail.fingerPrint());
                    return;
                }
            }
        }
    }
}

QString concatenateEmailAddressesToString(const QVector<QString> uids_, const QVector<QString> mailAddresses_, const QVector<QString> subkeyIDs_)
{
    Q_ASSERT(uids_.size() == mailAddresses_.size());
    QString out = QLatin1String("");
    for (auto i = 0; i < mailAddresses_.size(); ++i) {
        out += uids_.at(i) + QStringLiteral(" <");
        out += mailAddresses_.at(i) + QStringLiteral("> ");
        out += QStringLiteral("(") + subkeyIDs_.at(i) + QStringLiteral(")\n");
    }
    return out;
}

void KateGPGPluginView::makeTableCell(const QString cellValue, uint row, uint col)
{
    QTableWidgetItem *item = new QTableWidgetItem(cellValue);
    m_gpgKeyTable->setItem(row, col, item);
}

void KateGPGPluginView::updateKeyTable()
{
    m_gpgWrapper->loadKeys(m_showOnlyPrivateKeysCheckbox->isChecked(), m_hideExpiredKeysCheckbox->isChecked(), m_preferredEmailLineEdit->text());
    m_gpgKeyTable->setSortingEnabled(false);
    m_gpgKeyTable->setRowCount(0);
    m_gpgKeyTableHeader << i18n("Key Fingerprint") << i18n("Creation Date") << i18n("Expiry Date") << i18n("Key Length") << i18n("User IDs");
    m_gpgKeyTable->setHorizontalHeaderLabels(m_gpgKeyTableHeader);
    m_gpgKeyTable->resizeColumnsToContents();
    const QVector<GPGKeyDetails> &keyDetailsList = m_gpgWrapper->getKeys();
    uint numRows = 0;
    for (uint row = 0; row < m_gpgWrapper->getNumKeys(); ++row) {
        GPGKeyDetails keyDetail = keyDetailsList.at(row);
        m_gpgKeyTable->insertRow(m_gpgKeyTable->rowCount());
        makeTableCell(keyDetail.fingerPrint(), numRows, 0);
        makeTableCell(keyDetail.creationDate(), numRows, 1);
        makeTableCell(keyDetail.expiryDate(), numRows, 2);
        makeTableCell(keyDetail.keyLength(), numRows, 3);
        QString uidsAndMails(concatenateEmailAddressesToString(keyDetail.uids(), keyDetail.mailAddresses(), keyDetail.subkeyIDs()));
        makeTableCell(uidsAndMails, numRows, 4);
        ++numRows;
    }
    m_gpgKeyTable->resizeRowsToContents();
    m_gpgKeyTable->setSelectionMode(QAbstractItemView::ContiguousSelection);
    m_gpgKeyTable->sortByColumn(1, Qt::DescendingOrder);
    m_gpgKeyTable->setVerticalScrollMode(QAbstractItemView::ScrollPerPixel);
    m_gpgKeyTable->setHorizontalScrollMode(QAbstractItemView::ScrollPerPixel);
    m_gpgKeyTable->setSortingEnabled(true);
    if (m_gpgKeyTable->rowCount() > 0) {
        m_gpgKeyTable->selectRow(0);
    }
    m_gpgKeyTable->setMinimumHeight(250);
    m_gpgKeyTable->setMaximumHeight(500);
    m_gpgKeyTable->setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Expanding);
    m_gpgKeyTable->resizeColumnsToContents();
    m_gpgKeyTable->resizeRowsToContents();
}

#include "kategpgplugin.moc"

#include "moc_kategpgplugin.cpp"
