/*
    Copyright 2007-2008 by Robert Knight <robertknight@gmail.com>

    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation; either version 2 of the License, or
    (at your option) any later version.

    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with this program; if not, write to the Free Software
    Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
    02110-1301  USA.
*/

// Own
#include "Part.h"

// Qt
#include <QStringList>
#include <QDir>
#include <QKeyEvent>
#include <QUrl>

// KDE
#include <QAction>
#include <KActionCollection>
#include <KPluginFactory>
#include <KLocalizedString>
#include <KConfigDialog>

// Konsole
#include "EditProfileDialog.h"
#include "Emulation.h"
#include "Session.h"
#include "SessionController.h"
#include "SessionManager.h"
#include "ProfileManager.h"
#include "TerminalDisplay.h"
#include "ViewManager.h"
#include "ViewContainer.h"
#include "KonsoleSettings.h"
#include "settings/PartInfo.h"
#include "settings/ProfileSettings.h"

using namespace Konsole;

K_PLUGIN_FACTORY_WITH_JSON(KonsolePartFactory,
                           "konsolepart.json",
                           registerPlugin<Konsole::Part>();)

Part::Part(QWidget *parentWidget, QObject *parent, const QVariantList &) :
    KParts::ReadOnlyPart(parent),
    _viewManager(nullptr),
    _pluggedController(nullptr)
{
    // create view widget
    _viewManager = new ViewManager(this, actionCollection());
    _viewManager->setNavigationMethod(ViewManager::NoNavigation);

    connect(_viewManager, &Konsole::ViewManager::activeViewChanged, this,
            &Konsole::Part::activeViewChanged);
    connect(_viewManager, &Konsole::ViewManager::empty, this, &Konsole::Part::terminalExited);
    connect(_viewManager, &Konsole::ViewManager::newViewRequest, this, &Konsole::Part::newTab);

    _viewManager->widget()->setParent(parentWidget);

    setWidget(_viewManager->widget());
    actionCollection()->addAssociatedWidget(_viewManager->widget());
    foreach (QAction *action, actionCollection()->actions()) {
        action->setShortcutContext(Qt::WidgetWithChildrenShortcut);
    }

    // Enable translucency support.
    _viewManager->widget()->setAttribute(Qt::WA_TranslucentBackground, true);

    // create basic session
    createSession();
}

Part::~Part()
{
    ProfileManager::instance()->saveSettings();
    delete _viewManager;
}

bool Part::openFile()
{
    return false;
}

void Part::terminalExited()
{
    deleteLater();
}

void Part::newTab()
{
    createSession();
}

Session *Part::activeSession() const
{
    if (_viewManager->activeViewController() != nullptr) {
        Q_ASSERT(_viewManager->activeViewController()->session());

        return _viewManager->activeViewController()->session();
    } else {
        return nullptr;
    }
}

void Part::startProgram(const QString &program, const QStringList &arguments)
{
    Q_ASSERT(activeSession());

    // do nothing if the session has already started running
    if (activeSession()->isRunning()) {
        return;
    }

    if (!program.isEmpty() && !arguments.isEmpty()) {
        activeSession()->setProgram(program);
        activeSession()->setArguments(arguments);
    }

    activeSession()->run();
}

void Part::openTeletype(int ptyMasterFd)
{
    Q_ASSERT(activeSession());

    activeSession()->openTeletype(ptyMasterFd);
}

void Part::showShellInDir(const QString &dir)
{
    Q_ASSERT(activeSession());

    // do nothing if the session has already started running
    if (activeSession()->isRunning()) {
        return;
    }

    // All other checking is done in setInitialWorkingDirectory()
    if (!dir.isEmpty()) {
        activeSession()->setInitialWorkingDirectory(dir);
    }

    activeSession()->run();
}

void Part::sendInput(const QString &text)
{
    Q_ASSERT(activeSession());
    activeSession()->sendTextToTerminal(text);
}

int Part::terminalProcessId()
{
    Q_ASSERT(activeSession());

    return activeSession()->processId();
}

int Part::foregroundProcessId()
{
    Q_ASSERT(activeSession());

    if (activeSession()->isForegroundProcessActive()) {
        return activeSession()->foregroundProcessId();
    } else {
        return -1;
    }
}

QString Part::foregroundProcessName()
{
    Q_ASSERT(activeSession());

    if (activeSession()->isForegroundProcessActive()) {
        return activeSession()->foregroundProcessName();
    } else {
        return QString();
    }
}

QString Part::currentWorkingDirectory() const
{
    Q_ASSERT(activeSession());

    return activeSession()->currentWorkingDirectory();
}

void Part::createSession(const QString &profileName, const QString &directory)
{
    Profile::Ptr profile = ProfileManager::instance()->defaultProfile();
    if (!profileName.isEmpty()) {
        profile = ProfileManager::instance()->loadProfile(profileName);
    }

    Q_ASSERT(profile);

    Session *session = SessionManager::instance()->createSession(profile);

    // override the default directory specified in the profile
    if (!directory.isEmpty() && profile->startInCurrentSessionDir()) {
        session->setInitialWorkingDirectory(directory);
    }

    _viewManager->createView(_viewManager->activeContainer(), session);
}

void Part::activeViewChanged(SessionController *controller)
{
    Q_ASSERT(controller);
    Q_ASSERT(controller->view());

    // remove existing controller
    if (_pluggedController != nullptr) {
        removeChildClient(_pluggedController);
        disconnect(_pluggedController, &Konsole::SessionController::titleChanged, this,
                   &Konsole::Part::activeViewTitleChanged);
        disconnect(_pluggedController, &Konsole::SessionController::currentDirectoryChanged, this,
                   &Konsole::Part::currentDirectoryChanged);
    }

    // insert new controller
    insertChildClient(controller);

    connect(controller, &Konsole::SessionController::titleChanged, this,
            &Konsole::Part::activeViewTitleChanged);
    activeViewTitleChanged(controller);
    connect(controller, &Konsole::SessionController::currentDirectoryChanged, this,
            &Konsole::Part::currentDirectoryChanged);

    const char *displaySignal = SIGNAL(overrideShortcutCheck(QKeyEvent*,bool&));
    const char *partSlot = SLOT(overrideTerminalShortcut(QKeyEvent*,bool&));

    disconnect(controller->view(), displaySignal, this, partSlot);
    connect(controller->view(), displaySignal, this, partSlot);

    _pluggedController = controller;
}

void Part::overrideTerminalShortcut(QKeyEvent *event, bool &override)
{
    // Shift+Insert is commonly used as the alternate shortcut for
    // pasting in KDE apps(including konsole), so it deserves some
    // special treatment.
    if (((event->modifiers() & Qt::ShiftModifier) != 0u)
        && (event->key() == Qt::Key_Insert)) {
        override = false;
        return;
    }

    // override all shortcuts in the embedded terminal by default
    override = true;
    emit overrideShortcut(event, override);
}

void Part::activeViewTitleChanged(ViewProperties *properties)
{
    emit setWindowCaption(properties->title());
}

void Part::showManageProfilesDialog(QWidget *parent)
{
    // Make sure this string is unique among all users of this part
    if (KConfigDialog::showDialog(QStringLiteral("konsolepartmanageprofiles"))) {
        return;
    }

    KConfigDialog *settingsDialog = new KConfigDialog(parent, QStringLiteral("konsolepartmanageprofiles"),
                                                      KonsoleSettings::self());
    settingsDialog->setFaceType(KPageDialog::Tabbed);

    auto profileSettings = new ProfileSettings(settingsDialog);
    settingsDialog->addPage(profileSettings,
                            i18nc("@title Preferences page name",
                                  "Profiles"),
                            QStringLiteral("configure"));

    auto partInfoSettings = new PartInfoSettings(settingsDialog);
    settingsDialog->addPage(partInfoSettings,
                            i18nc("@title Preferences page name",
                                  "Part Info"),
                            QStringLiteral("dialog-information"));

    settingsDialog->show();
}

void Part::showEditCurrentProfileDialog(QWidget *parent)
{
    Q_ASSERT(activeSession());

    auto dialog = new EditProfileDialog(parent);
    dialog->setAttribute(Qt::WA_DeleteOnClose);
    dialog->setProfile(SessionManager::instance()->sessionProfile(activeSession()));
    dialog->show();
}

void Part::changeSessionSettings(const QString &text)
{
    Q_ASSERT(activeSession());

    // send a profile change command, the escape code format
    // is the same as the normal X-Term commands used to change the window title or icon,
    // but with a magic value of '50' for the parameter which specifies what to change
    QString command = QStringLiteral("\033]50;%1\a").arg(text);

    sendInput(command);
}

// Konqueror integration
bool Part::openUrl(const QUrl &url)
{
    if (KParts::ReadOnlyPart::url() == url) {
        emit completed();
        return true;
    }

    setUrl(url);
    emit setWindowCaption(url.toDisplayString(QUrl::PreferLocalFile));
    ////qDebug() << "Set Window Caption to " << url.pathOrUrl();
    emit started(nullptr);

    if (url.isLocalFile()) {
        showShellInDir(url.path());
    } else {
        showShellInDir(QDir::homePath());
    }

    emit completed();
    return true;
}

void Part::setMonitorSilenceEnabled(bool enabled)
{
    Q_ASSERT(activeSession());

    if (enabled) {
        activeSession()->setMonitorSilence(true);
        connect(activeSession(), &Konsole::Session::stateChanged,
                this, &Konsole::Part::sessionStateChanged,
                Qt::UniqueConnection);
    } else {
        activeSession()->setMonitorSilence(false);
        disconnect(activeSession(), &Konsole::Session::stateChanged,
                   this, &Konsole::Part::sessionStateChanged);
    }
}

void Part::setMonitorActivityEnabled(bool enabled)
{
    Q_ASSERT(activeSession());

    if (enabled) {
        activeSession()->setMonitorActivity(true);
        connect(activeSession(), &Konsole::Session::stateChanged,
                this, &Konsole::Part::sessionStateChanged,
                Qt::UniqueConnection);
    } else {
        activeSession()->setMonitorActivity(false);
        disconnect(activeSession(), &Konsole::Session::stateChanged,
                   this,
                   &Konsole::Part::sessionStateChanged);
    }
}

bool Part::isBlurEnabled()
{
    return ViewManager::profileHasBlurEnabled(SessionManager::instance()->sessionProfile(activeSession()));
}

void Part::sessionStateChanged(int state)
{
    if (state == NOTIFYSILENCE) {
        emit silenceDetected();
    } else if (state == NOTIFYACTIVITY) {
        emit activityDetected();
    }
}

#include "Part.moc"
