/**
 * @file llchannelmanager.cpp
 * @brief This class rules screen notification channels.
 *
 * $LicenseInfo:firstyear=2000&license=viewerlgpl$
 * 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 "llchannelmanager.h"

#include "llappviewer.h"
#include "lldonotdisturbnotificationstorage.h"
#include "llpersistentnotificationstorage.h"
#include "llviewercontrol.h"
#include "llviewerwindow.h"
#include "llrootview.h"
#include "llsyswellwindow.h"
#include "llfloaternotificationstabbed.h"
#include "llfloaterreg.h"

#include <algorithm>

using namespace LLNotificationsUI;

//--------------------------------------------------------------------------
LLChannelManager::LLChannelManager()
{
    LLAppViewer::instance()->setOnLoginCompletedCallback(boost::bind(&LLChannelManager::onLoginCompleted, this));
    mChannelList.clear();
    mStartUpChannel = NULL;

    if(!gViewerWindow)
    {
        LL_ERRS() << "LLChannelManager::LLChannelManager() - viwer window is not initialized yet" << LL_ENDL;
    }

    // We don't actually need this instance right now, but our
    // cleanupSingleton() method deletes LLScreenChannels, which need to
    // unregister from LLUI. Calling LLUI::instance() here establishes the
    // dependency so LLSingletonBase::deleteAll() calls our deleteSingleton()
    // before LLUI::deleteSingleton().
    LLUI::instance();
}

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

//--------------------------------------------------------------------------
void LLChannelManager::cleanupSingleton()
{
    // Note: LLScreenChannelBase is a LLUICtrl and depends onto other singletions
    // not captured by singleton-dependency, so cleanup it here instead of destructor
    for (std::vector<ChannelElem>::iterator it = mChannelList.begin(); it != mChannelList.end(); ++it)
    {
        LLScreenChannelBase* channel = it->channel.get();
        if (!channel) continue;

        delete channel;
    }

    mChannelList.clear();
}

//--------------------------------------------------------------------------
LLScreenChannel* LLChannelManager::createNotificationChannel()
{
    //  creating params for a channel
    LLScreenChannelBase::Params p;
    p.id = NOTIFICATION_CHANNEL_UUID;
    p.channel_align = CA_RIGHT;
    p.toast_align = NA_TOP;

    // Getting a Channel for our notifications
    return dynamic_cast<LLScreenChannel*> (LLChannelManager::getInstance()->getChannel(p));
}

//--------------------------------------------------------------------------
void LLChannelManager::onLoginCompleted()
{
    S32 away_notifications = 0;

    // calc a number of all offline notifications
    for(std::vector<ChannelElem>::iterator it = mChannelList.begin(); it !=  mChannelList.end(); ++it)
    {
        LLScreenChannelBase* channel = it->channel.get();
        if (!channel) continue;

        // don't calc notifications for Nearby Chat
        if(channel->getChannelID() == NEARBY_CHAT_CHANNEL_UUID)
        {
            continue;
        }

        // don't calc notifications for channels that always show their notifications
        if(!channel->getDisplayToastsAlways())
        {
            away_notifications +=channel->getNumberOfHiddenToasts();
        }
    }

    away_notifications += gIMMgr->getNumberOfUnreadIM();

    if(!away_notifications)
    {
        onStartUpToastClose();
    }
    else
    {
        // create a channel for the StartUp Toast
        LLScreenChannelBase::Params p;
        p.id = STARTUP_CHANNEL_UUID;
        p.channel_align = CA_RIGHT;
        mStartUpChannel = createChannel(p);

        if(!mStartUpChannel)
        {
            onStartUpToastClose();
        }
        else
        {
            gViewerWindow->getRootView()->addChild(mStartUpChannel);

            // init channel's position and size
            S32 channel_right_bound = gViewerWindow->getWorldViewRectScaled().mRight - gSavedSettings.getS32("NotificationChannelRightMargin");
            mStartUpChannel->init(channel_right_bound - NOTIFY_BOX_WIDTH, channel_right_bound);
            mStartUpChannel->setMouseDownCallback(boost::bind(&LLFloaterNotificationsTabbed::onStartUpToastClick, LLFloaterNotificationsTabbed::getInstance(), _2, _3, _4));

            mStartUpChannel->setCommitCallback(boost::bind(&LLChannelManager::onStartUpToastClose, this));
            mStartUpChannel->createStartUpToast(away_notifications, (F32)gSavedSettings.getS32("StartUpToastLifeTime"));
        }
    }

    LLPersistentNotificationStorage::getInstance()->loadNotifications();
    LLDoNotDisturbNotificationStorage::getInstance()->loadNotifications();
}

//--------------------------------------------------------------------------
void LLChannelManager::onStartUpToastClose()
{
    if(mStartUpChannel)
    {
        mStartUpChannel->setVisible(false);
        mStartUpChannel->closeStartUpToast();
        removeChannelByID(STARTUP_CHANNEL_UUID);
        mStartUpChannel = NULL;
    }

    // set StartUp Toast Flag to allow all other channels to show incoming toasts
    LLScreenChannel::setStartUpToastShown();
}

//--------------------------------------------------------------------------

LLScreenChannelBase*    LLChannelManager::addChannel(LLScreenChannelBase* channel)
{
    if(!channel)
        return 0;

    ChannelElem new_elem;
    new_elem.id = channel->getChannelID();
    new_elem.channel = channel->getHandle();

    mChannelList.push_back(new_elem);

    return channel;
}

LLScreenChannel* LLChannelManager::createChannel(LLScreenChannelBase::Params& p)
{
    LLScreenChannel* new_channel = new LLScreenChannel(p);

    addChannel(new_channel);
    return new_channel;
}

LLScreenChannelBase* LLChannelManager::getChannel(LLScreenChannelBase::Params& p)
{
    LLScreenChannelBase* new_channel = findChannelByID(p.id);

    if(new_channel)
        return new_channel;

    return createChannel(p);

}

//--------------------------------------------------------------------------
LLScreenChannelBase* LLChannelManager::findChannelByID(const LLUUID& id)
{
    std::vector<ChannelElem>::iterator it = find(mChannelList.begin(), mChannelList.end(), id);
    if(it != mChannelList.end())
    {
        return (*it).channel.get();
    }

    return NULL;
}

//--------------------------------------------------------------------------
void LLChannelManager::removeChannelByID(const LLUUID& id)
{
    std::vector<ChannelElem>::iterator it = find(mChannelList.begin(), mChannelList.end(), id);
    if(it != mChannelList.end())
    {
        mChannelList.erase(it);
    }
}

//--------------------------------------------------------------------------
void LLChannelManager::muteAllChannels(bool mute)
{
    for (std::vector<ChannelElem>::iterator it = mChannelList.begin();
            it != mChannelList.end(); it++)
    {
        if (it->channel.get())
        {
            it->channel.get()->setShowToasts(!mute);
        }
    }
}

void LLChannelManager::killToastsFromChannel(const LLUUID& channel_id, const LLScreenChannel::Matcher& matcher)
{
    LLScreenChannel
            * screen_channel =
                    dynamic_cast<LLScreenChannel*> (findChannelByID(channel_id));
    if (screen_channel != NULL)
    {
        screen_channel->killMatchedToasts(matcher);
    }
}

// static
LLNotificationsUI::LLScreenChannel* LLChannelManager::getNotificationScreenChannel()
{
    LLNotificationsUI::LLScreenChannel* channel = static_cast<LLNotificationsUI::LLScreenChannel*>
    (LLNotificationsUI::LLChannelManager::getInstance()->
                                        findChannelByID(NOTIFICATION_CHANNEL_UUID));

    if (channel == NULL)
    {
        LL_WARNS() << "Can't find screen channel by NotificationChannelUUID" << LL_ENDL;
        llassert(!"Can't find screen channel by NotificationChannelUUID");
    }

    return channel;
}