/**
 * @file llnotificationalerthandler.cpp
 * @brief Notification Handler Class for Alert Notifications
 *
 * $LicenseInfo:firstyear=2000&license=viewerlgpl$
 * Second Life Viewer Source Code
 * Copyright (C) 2010, Linden Research, Inc.
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation;
 * version 2.1 of the License only.
 *
 * This library 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
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
 *
 * Linden Research, Inc., 945 Battery Street, San Francisco, CA  94111  USA
 * $/LicenseInfo$
 */


#include "llviewerprecompiledheaders.h" // must be first include

#include "llnotificationhandler.h"

#include "llagentcamera.h"
#include "llnotifications.h"
#include "llprogressview.h"
#include "lltoastnotifypanel.h"
#include "llviewercontrol.h"
#include "llviewerwindow.h"

#include "lltoastalertpanel.h"

using namespace LLNotificationsUI;

//--------------------------------------------------------------------------
LLAlertHandler::LLAlertHandler(const std::string& name, const std::string& notification_type, bool is_modal)
:   LLSystemNotificationHandler(name, notification_type),
    mIsModal(is_modal)
{
    LLScreenChannelBase::Params p;
    p.id = ALERT_CHANNEL_UUID;
    p.display_toasts_always = true;
    p.toast_align = NA_CENTRE;
    p.channel_align = CA_CENTRE;

    // Getting a Channel for our notifications
    mChannel = LLChannelManager::getInstance()->getChannel(p)->getHandle();
    mChannel.get()->setCanStoreToasts(false);
}

//--------------------------------------------------------------------------
LLAlertHandler::~LLAlertHandler()
{
}

//--------------------------------------------------------------------------
void LLAlertHandler::initChannel()
{
    S32 channel_right_bound = gViewerWindow->getWorldViewRectScaled().getWidth() / 2;
    mChannel.get()->init(channel_right_bound, channel_right_bound);
}

//--------------------------------------------------------------------------
bool LLAlertHandler::processNotification(const LLNotificationPtr& notification, bool should_log)
{
    if(mChannel.isDead())
    {
        return false;
    }

    // arrange a channel on a screen
    if(!mChannel.get()->getVisible())
    {
        initChannel();
    }

    if (notification->canLogToIM() && notification->hasFormElements())
    {
        const std::string name = LLHandlerUtil::getSubstitutionName(notification);

        LLUUID from_id = notification->getPayload()["from_id"];

        // firstly create session...
        LLHandlerUtil::spawnIMSession(name, from_id);

        // ...then log message to have IM Well notified about new message
        LLHandlerUtil::logToIMP2P(notification);
    }

    LLToastAlertPanel* alert_dialog = new LLToastAlertPanel(notification, mIsModal);
    LLToast::Params p;
    p.notif_id = notification->getID();
    p.notification = notification;
    p.panel = dynamic_cast<LLToastPanel*>(alert_dialog);
    p.enable_hide_btn = false;
    p.can_fade = false;
    p.is_modal = mIsModal;
    p.on_delete_toast = boost::bind(&LLAlertHandler::onDeleteToast, this, _1);

    // Show alert in middle of progress view (during teleport) (EXT-1093)
    LLProgressView* progress = gViewerWindow->getProgressView();
    LLRect rc = progress && progress->getVisible() ? progress->getRect() : gViewerWindow->getWorldViewRectScaled();
    mChannel.get()->updatePositionAndSize(rc);

    LLScreenChannel* channel = dynamic_cast<LLScreenChannel*>(mChannel.get());
    if(channel)
        channel->addToast(p);

    return false;
}

void LLAlertHandler::onChange( LLNotificationPtr notification )
{
    LLToastAlertPanel* alert_dialog = new LLToastAlertPanel(notification, mIsModal);
    LLScreenChannel* channel = dynamic_cast<LLScreenChannel*>(mChannel.get());
    if(channel)
        channel->modifyToastByNotificationID(notification->getID(), (LLToastPanel*)alert_dialog);
}

//--------------------------------------------------------------------------
LLViewerAlertHandler::LLViewerAlertHandler(const std::string& name, const std::string& notification_type)
    : LLSystemNotificationHandler(name, notification_type)
{
}

bool LLViewerAlertHandler::processNotification(const LLNotificationPtr& p, bool should_log)
{
    if (gHeadlessClient)
    {
        LL_INFOS("LLViewerAlertHandler") << "Alert: " << p->getName() << LL_ENDL;
    }

    // If we're in mouselook, the mouse is hidden and so the user can't click
    // the dialog buttons.  In that case, change to First Person instead.
    if( gAgentCamera.cameraMouselook() )
    {
        gAgentCamera.changeCameraToDefault();
    }

    return false;
}