/**
 * @file llnotificationofferhandler.cpp
 * @brief Provides set of utility methods for notifications processing.
 *
 * $LicenseInfo:firstyear=2000&license=viewerlgpl$
 * 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 "llavatarnamecache.h"

#include "llfloaterreg.h"
#include "llnotifications.h"
#include "llurlaction.h"

#include "llagent.h"
#include "llfloaterimsession.h"
#include "llimview.h"
#include "llfloaterimnearbychat.h"
#include "llnotificationhandler.h"

using namespace LLNotificationsUI;

LLNotificationHandler::LLNotificationHandler(const std::string& name, const std::string& notification_type, const std::string& parentName)
:   LLNotificationChannel(name, parentName, LLNotificationFilters::filterBy<std::string>(&LLNotification::getType, notification_type))
{}

LLSystemNotificationHandler::LLSystemNotificationHandler(const std::string& name, const std::string& notification_type)
    : LLNotificationHandler(name, notification_type, "System")
{}

LLCommunicationNotificationHandler::LLCommunicationNotificationHandler(const std::string& name, const std::string& notification_type)
    : LLNotificationHandler(name, notification_type, "Communication")
{}

// static
bool LLHandlerUtil::isIMFloaterOpened(const LLNotificationPtr& notification)
{
    bool res = false;

    LLUUID from_id = notification->getPayload()["from_id"];
    LLUUID session_id = LLIMMgr::computeSessionID(IM_NOTHING_SPECIAL, from_id);
    if (LLFloaterIMSession* im_floater = LLFloaterReg::findTypedInstance<LLFloaterIMSession>("impanel", session_id))
    {
        res = im_floater->getVisible();
    }

    return res;
}

// static
void LLHandlerUtil::logToIM(const EInstantMessage& session_type,
        const std::string& session_name, const std::string& from_name,
        const std::string& message, const LLUUID& session_owner_id,
        const LLUUID& from_id)
{
    std::string from = from_name;
    if (from_name.empty())
    {
        from = SYSTEM_FROM;
    }

    LLUUID session_id = LLIMMgr::computeSessionID(session_type,
            session_owner_id);
    LLIMModel::LLIMSession* session = LLIMModel::instance().findIMSession(
            session_id);
    if (session == NULL)
    {
        // replace interactive system message marker with correct from string value
        if (INTERACTIVE_SYSTEM_FROM == from_name)
        {
            from = SYSTEM_FROM;
        }

        // Build a new format username or firstname_lastname for legacy names
        // to use it for a history log filename.
        std::string user_name = LLCacheName::buildUsername(session_name);
        LLIMModel::instance().logToFile(user_name, from, from_id, message);
    }
    else
    {
        S32 unread = session->mNumUnread;
        S32 participant_unread = session->mParticipantUnreadMessageCount;
        LLIMModel::instance().addMessageSilently(session_id, from, from_id,
                message);
        // we shouldn't increment counters when logging, so restore them
        session->mNumUnread = unread;
        session->mParticipantUnreadMessageCount = participant_unread;

        // update IM floater messages
        updateIMFLoaterMesages(session_id);
    }
}

void log_name_callback(const LLAvatarName& av_name, const std::string& from_name,
                       const std::string& message, const LLUUID& from_id)

{
    LLHandlerUtil::logToIM(IM_NOTHING_SPECIAL, av_name.getUserName(), from_name, message,
                    from_id, LLUUID());
}

// static
void LLHandlerUtil::logToIMP2P(const LLUUID& from_id, const std::string& message, bool to_file_only)
{
    if (!gCacheName)
    {
        return;
    }

    if (from_id.isNull())
    {
        // Normal behavior for system generated messages, don't spam.
        // LL_WARNS() << " from_id for notification " << notification->getName() << " is null " << LL_ENDL;
        return;
    }

    if(to_file_only)
    {
        LLAvatarNameCache::get(from_id, boost::bind(&log_name_callback, _2, "", message, LLUUID()));
    }
    else
    {
        LLAvatarNameCache::get(from_id, boost::bind(&log_name_callback, _2, INTERACTIVE_SYSTEM_FROM, message, from_id));
    }
}

// static
void LLHandlerUtil::logToIMP2P(const LLNotificationPtr& notification, bool to_file_only)
{
    LLUUID from_id = notification->getPayload()["from_id"];
    logToIMP2P(from_id, notification->getMessage(), to_file_only);
}

// static
void LLHandlerUtil::logGroupNoticeToIMGroup(
        const LLNotificationPtr& notification)
{

    const LLSD& payload = notification->getPayload();
    LLGroupData groupData;
    if (!gAgent.getGroupData(payload["group_id"].asUUID(), groupData))
    {
        LL_WARNS()
                        << "Group notice for unknown group: "
                                << payload["group_id"].asUUID() << LL_ENDL;
        return;
    }

    const std::string group_name = groupData.mName;
    const std::string sender_name = payload["sender_name"].asString();

    LLUUID sender_id;
    if (payload.has("sender_id"))
    {
        sender_id = payload["sender_id"].asUUID();
    }

    if (sender_id.notNull())
    {
        // Legacy support and fallback method
        // if we can't retrieve sender id from group notice system message, try to lookup it from cache
        sender_id = LLAvatarNameCache::getInstance()->findIdByName(sender_name);
    }

    logToIM(IM_SESSION_GROUP_START, group_name, sender_name, payload["message"],
            payload["group_id"], sender_id);
}

// static
void LLHandlerUtil::logToNearbyChat(const LLNotificationPtr& notification, EChatSourceType type)
{
    LLFloaterIMNearbyChat* nearby_chat = LLFloaterReg::findTypedInstance<LLFloaterIMNearbyChat>("nearby_chat");
    if (nearby_chat)
    {
        LLChat chat_msg(notification->getMessage());
        chat_msg.mSourceType = type;
        chat_msg.mFromName = SYSTEM_FROM;
        chat_msg.mFromID = LLUUID::null;
        nearby_chat->addMessage(chat_msg);
    }
}

// static
LLUUID LLHandlerUtil::spawnIMSession(const std::string& name, const LLUUID& from_id)
{
    LLUUID session_id = LLIMMgr::computeSessionID(IM_NOTHING_SPECIAL, from_id);

    LLIMModel::LLIMSession* session = LLIMModel::instance().findIMSession(
            session_id);
    if (session == NULL)
    {
        session_id = LLIMMgr::instance().addSession(name, IM_NOTHING_SPECIAL, from_id);
    }

    return session_id;
}

// static
std::string LLHandlerUtil::getSubstitutionName(const LLNotificationPtr& notification)
{
    std::string res = notification->getSubstitutions().has("NAME")
        ? notification->getSubstitutions()["NAME"]
        : notification->getSubstitutions()["[NAME]"];
    if (res.empty())
    {
        LLUUID from_id = notification->getPayload()["FROM_ID"];

        //*TODO all keys everywhere should be made of the same case, there is a mix of keys in lower and upper cases
        if (from_id.isNull())
        {
            from_id = notification->getPayload()["from_id"];
        }
        LLAvatarName av_name;
        if(LLAvatarNameCache::get(from_id, &av_name))
        {
            res = av_name.getUserName();
        }
        else
        {
            res = "";
        }
    }
    return res;
}

// static
std::string LLHandlerUtil::getSubstitutionOriginalName(const LLNotificationPtr& notification)
{
    if(notification->getSubstitutions().has("ORIGINAL_NAME"))
    {
        std::string name = notification->getSubstitutions()["ORIGINAL_NAME"];
        if(!name.empty())
        {
            return name;
        }
    }
    return LLHandlerUtil::getSubstitutionName(notification);
}

// static
void LLHandlerUtil::addNotifPanelToIM(const LLNotificationPtr& notification)
{
    const std::string name = LLHandlerUtil::getSubstitutionName(notification);
    LLUUID from_id = notification->getPayload()["from_id"];

    LLUUID session_id = spawnIMSession(name, from_id);
    // add offer to session
    LLIMModel::LLIMSession * session = LLIMModel::getInstance()->findIMSession(
            session_id);
    llassert_always(session != NULL);

    LLSD offer;
    offer["notification_id"] = notification->getID();
    offer["from"] = SYSTEM_FROM;
    offer["time"] = LLLogChat::timestamp2LogString(0, false);   // Use current time
    offer["index"] = (LLSD::Integer)session->mMsgs.size();
    session->mMsgs.push_front(offer);


    // update IM floater and counters
    LLSD arg;
    arg["session_id"] = session_id;
    arg["num_unread"] = ++(session->mNumUnread);
    arg["participant_unread"] = ++(session->mParticipantUnreadMessageCount);
    LLIMModel::getInstance()->mNewMsgSignal(arg);
}

// static
void LLHandlerUtil::updateIMFLoaterMesages(const LLUUID& session_id)
{
    LLFloaterIMSession* im_floater = LLFloaterIMSession::findInstance(session_id);
    if (im_floater != NULL && im_floater->getVisible())
    {
        im_floater->updateMessages();
    }
}

// static
void LLHandlerUtil::updateVisibleIMFLoaterMesages(const LLNotificationPtr& notification)
{
    const std::string name = LLHandlerUtil::getSubstitutionName(notification);
    LLUUID from_id = notification->getPayload()["from_id"];
    LLUUID session_id = spawnIMSession(name, from_id);

    updateIMFLoaterMesages(session_id);
}

// static
void LLHandlerUtil::decIMMesageCounter(const LLNotificationPtr& notification)
{
    const std::string name = LLHandlerUtil::getSubstitutionName(notification);
    LLUUID from_id = notification->getPayload()["from_id"];
    LLUUID session_id = LLIMMgr::computeSessionID(IM_NOTHING_SPECIAL, from_id);

    LLIMModel::LLIMSession * session = LLIMModel::getInstance()->findIMSession(session_id);

    if (session)
    {
    LLSD arg;
    arg["session_id"] = session_id;
    session->mNumUnread--;
    arg["num_unread"] = session->mNumUnread;
    session->mParticipantUnreadMessageCount--;
    arg["participant_unread"] = session->mParticipantUnreadMessageCount;
    LLIMModel::getInstance()->mNewMsgSignal(arg);
}
}