/**
 * Copyright 2013 Albert Vaca <albertvaka@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) version 3 or any later version
 * accepted by the membership of KDE e.V. (or its successor approved
 * by the membership of KDE e.V.), which shall act as a proxy
 * defined in Section 14 of version 3 of the license.
 *
 * 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, see <http://www.gnu.org/licenses/>.
 */

#include "notificationsdbusinterface.h"
#include "notification_debug.h"

#include <QDBusConnection>

#include <KNotification>
#include <QIcon>
#include <QCryptographicHash>

#include <core/device.h>
#include <core/kdeconnectplugin.h>
#include <core/filetransferjob.h>

#include "notificationsplugin.h"

NotificationsDbusInterface::NotificationsDbusInterface(KdeConnectPlugin* plugin)
    : QDBusAbstractAdaptor(const_cast<Device*>(plugin->device()))
    , mDevice(plugin->device())
    , mPlugin(plugin)
    , mLastId(0)
    , imagesDir(QDir::temp().absoluteFilePath("kdeconnect"))
{
    imagesDir.mkpath(imagesDir.absolutePath());
}

NotificationsDbusInterface::~NotificationsDbusInterface()
{
    qCDebug(KDECONNECT_PLUGIN_NOTIFICATION) << "Destroying NotificationsDbusInterface";
}

void NotificationsDbusInterface::clearNotifications()
{
    qDeleteAll(mNotifications);
    mNotifications.clear();
    Q_EMIT allNotificationsRemoved();
}

QStringList NotificationsDbusInterface::activeNotifications()
{
    return mNotifications.keys();
}

void NotificationsDbusInterface::processPackage(const NetworkPackage& np)
{
    if (np.get<bool>("isCancel")) {
        QString id = np.get<QString>("id");
        // cut off kdeconnect-android's prefix if there:
        if (id.startsWith("org.kde.kdeconnect_tp::"))
            id = id.mid(id.indexOf("::") + 2);
        removeNotification(id);
    } else if (np.get<bool>("isRequest")) {
        for (const auto& n: mNotifications) {
            NetworkPackage np(PACKAGE_TYPE_NOTIFICATION);
            np.set("id", n->internalId());
            np.set("appName", n->appName());
            np.set("ticker", n->ticker());
            np.set("isClearable", n->dismissable());
            np.set("requestAnswer", true);
            mPlugin->sendPackage(np);
        }
    } else {

        //TODO: Uncoment when we are able to display app icon on plasmoid
        QString destination;
        /*
        if (np.hasPayload()) {
            QString filename = KMD5(np.get<QString>("appName").toLatin1()).hexDigest();  //TODO: Store with extension?
            destination = imagesDir.absoluteFilePath(filename);
            FileTransferJob* job = np.createPayloadTransferJob(destination);
            job->start();
        }
        */

        Notification* noti = new Notification(np, destination, this);

        //Do not show updates to existent notification nor answers to a initialization request
        if (!mInternalIdToPublicId.contains(noti->internalId()) && !np.get<bool>("requestAnswer", false) && !np.get<bool>("silent", false)) {
            KNotification* notification = new KNotification("notification", KNotification::CloseOnTimeout, this);
            notification->setIconName(QStringLiteral("preferences-desktop-notification"));
            notification->setComponentName("kdeconnect");
            notification->setTitle(mDevice->name());
            notification->setText(noti->appName() + ": " + noti->ticker());
            notification->sendEvent();
        }

        addNotification(noti);
    }
}

void NotificationsDbusInterface::addNotification(Notification* noti)
{
    const QString& internalId = noti->internalId();

    if (mInternalIdToPublicId.contains(internalId)) {
        removeNotification(internalId);
    }

    connect(noti, &Notification::dismissRequested,
            this, &NotificationsDbusInterface::dismissRequested);

    const QString& publicId = newId();
    mNotifications[publicId] = noti;
    mInternalIdToPublicId[internalId] = publicId;

    QDBusConnection::sessionBus().registerObject(mDevice->dbusPath()+"/notifications/"+publicId, noti, QDBusConnection::ExportScriptableContents);
    Q_EMIT notificationPosted(publicId);
}

void NotificationsDbusInterface::removeNotification(const QString& internalId)
{
    qCDebug(KDECONNECT_PLUGIN_NOTIFICATION) << "removeNotification" << internalId;

    if (!mInternalIdToPublicId.contains(internalId)) {
        qCDebug(KDECONNECT_PLUGIN_NOTIFICATION) << "Not found: " << internalId;
        return;
    }

    QString publicId = mInternalIdToPublicId.take(internalId);

    Notification* noti = mNotifications.take(publicId);
    if (!noti) {
        qCDebug(KDECONNECT_PLUGIN_NOTIFICATION) << "Not found";
        return;
    }

    //Deleting the notification will unregister it automatically
    //QDBusConnection::sessionBus().unregisterObject(mDevice->dbusPath()+"/notifications/"+publicId);
    noti->deleteLater();

    Q_EMIT notificationRemoved(publicId);
}

void NotificationsDbusInterface::dismissRequested(const QString& internalId)
{
    NetworkPackage np(PACKAGE_TYPE_NOTIFICATION);
    np.set<QString>("cancel", internalId);
    mPlugin->sendPackage(np);

    //Workaround: we erase notifications without waiting a repsonse from the
    //phone because we won't receive a response if we are out of sync and this
    //notification no longer exists. Ideally, each time we reach the phone
    //after some time disconnected we should re-sync all the notifications.
    removeNotification(internalId);
}

QString NotificationsDbusInterface::newId()
{
    return QString::number(++mLastId);
}