/***************************************************************************
 *   Copyright (C) 2010 Alejandro Fiestas Olivares <alex@eyeos.org>        *
 *   Copyright (C) 2010 Eduardo Robles Elvira <edulix@gmail.com>           *
 *   Copyright (C) 2010 UFO Coders <info@ufocoders.com>                    *
 *   Copyright (C) 2014-2015 David Rosca <nowrep@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            *
 ***************************************************************************/

#include "requestpin.h"
#include "ui_requestpin.h"
#include "debug_p.h"

#include <QIcon>
#include <QDialog>
#include <QPushButton>
#include <QRegularExpressionValidator>

#include <KWindowSystem>
#include <KNotification>
#include <KLocalizedString>

RequestPin::RequestPin(BluezQt::DevicePtr device, bool numeric, QObject *parent)
    : QObject(parent)
    , m_dialogWidget(nullptr)
    , m_device(device)
    , m_numeric(numeric)
{
    m_notification = new KNotification(QStringLiteral("RequestPin"),
                                       KNotification::Persistent, this);

    m_notification->setComponentName(QStringLiteral("bluedevil"));
    m_notification->setTitle(QStringLiteral("%1 (%2)").arg(m_device->name(), m_device->address()));
    m_notification->setText(i18nc("Shown in a notification to announce that a PIN is needed to accomplish a pair action,"
                                  "%1 is the name of the bluetooth device",
                                   "PIN needed to pair with %1", m_device->name()));

    QStringList actions;
    actions.append(i18nc("Notification button which once clicked, a dialog to introduce the PIN will be shown",
                         "Introduce PIN"));

    m_notification->setActions(actions);

    connect(m_notification, &KNotification::action1Activated,this, &RequestPin::introducePin);
    connect(m_notification, &KNotification::closed, this, &RequestPin::quit);
    connect(m_notification, &KNotification::ignored, this, &RequestPin::quit);
    connect(parent, SIGNAL(agentCanceled()), this, SLOT(quit()));

    m_notification->sendEvent();
}

void RequestPin::introducePin()
{
    m_notification->disconnect();
    m_notification->close();
    m_notification->deleteLater();

    QDialog *dialog = new QDialog;
    dialog->setAttribute(Qt::WA_DeleteOnClose);
    dialog->setWindowIcon(QIcon::fromTheme(QStringLiteral("preferences-system-bluetooth")));

    dialog->setWindowTitle(i18nc("Shown in the caption of a dialog where the user introduce the PIN",
                                 "Introduce PIN"));

    m_dialogWidget = new Ui::DialogWidget;
    m_dialogWidget->setupUi(dialog);
    m_dialogWidget->descLabel->setText(i18nc("Shown in a dialog which asks to introduce a PIN that will be used to pair a Bluetooth device,"
                                             "%1 is the name of the Bluetooth device",
                                             "In order to pair this computer with %1, you have to enter a PIN. Please do it below.", m_device->name()));

    m_dialogWidget->pixmap->setPixmap(QIcon::fromTheme(QStringLiteral("preferences-system-bluetooth")).pixmap(64));
    m_dialogWidget->pin->setFocus(Qt::ActiveWindowFocusReason);

    if (m_numeric) {
        QRegularExpression rx(QStringLiteral("[0-9]{1,6}"));
        m_dialogWidget->pin->setValidator(new QRegularExpressionValidator(rx, this));
    } else {
        QRegularExpression rx(QStringLiteral("[A-Za-z0-9]{1,16}"));
        m_dialogWidget->pin->setValidator(new QRegularExpressionValidator(rx, this));
    }

    m_dialogWidget->buttonBox->button(QDialogButtonBox::Ok)->setEnabled(false);
    dialog->setFixedSize(dialog->sizeHint());

    connect(dialog, &QDialog::finished, this, &RequestPin::dialogFinished);
    connect(m_dialogWidget->pin, &QLineEdit::textChanged, this, &RequestPin::checkPin);
    connect(m_dialogWidget->buttonBox, &QDialogButtonBox::accepted, dialog, &QDialog::accept);
    connect(m_dialogWidget->buttonBox, &QDialogButtonBox::rejected, dialog, &QDialog::reject);

    dialog->show();

    KWindowSystem::setState(dialog->winId(), NET::KeepAbove);
    KWindowSystem::forceActiveWindow(dialog->winId());
}

void RequestPin::checkPin(const QString &pin)
{
    m_dialogWidget->buttonBox->button(QDialogButtonBox::Ok)->setEnabled(!pin.isEmpty());
}

void RequestPin::dialogFinished(int result)
{
    deleteLater();

    if (!result) {
        qCDebug(BLUEDAEMON) << "PIN dialog rejected:" << m_device->name() << m_device->address();
        Q_EMIT done(QString());
        return;
    }

    qCDebug(BLUEDAEMON) << "PIN dialog accepted:" << m_device->name() << m_device->address();
    Q_EMIT done(m_dialogWidget->pin->text().toLatin1().constData());
}

void RequestPin::quit()
{
    qCDebug(BLUEDAEMON) << "Rejected to introduce PIN:" << m_device->name() << m_device->address();

    deleteLater();
    Q_EMIT done(QString());
}
