/**
 * @file llviewerchat.cpp
 * @brief Builds menus out of items.
 *
 * $LicenseInfo:firstyear=2002&license=viewerlgpl$
 * 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"
#include "llviewerchat.h"

// newview includes
#include "llagent.h"    // gAgent
#include "llslurl.h"
#include "lltrans.h"
#include "lluicolor.h"
#include "lluicolortable.h"
#include "llviewercontrol.h" // gSavedSettings
#include "llviewerregion.h"
#include "llworld.h"
#include "llinstantmessage.h" //SYSTEM_FROM

// LLViewerChat
LLViewerChat::font_change_signal_t LLViewerChat::sChatFontChangedSignal;

//static
void LLViewerChat::getChatColor(const LLChat& chat, LLColor4& r_color)
{
    if(chat.mMuted)
    {
        r_color= LLUIColorTable::instance().getColor("LtGray");
    }
    else
    {
        switch(chat.mSourceType)
        {
            case CHAT_SOURCE_SYSTEM:
                r_color = LLUIColorTable::instance().getColor("SystemChatColor");
                break;
            case CHAT_SOURCE_AGENT:
                if (chat.mFromID.isNull() || SYSTEM_FROM == chat.mFromName)
                {
                    r_color = LLUIColorTable::instance().getColor("SystemChatColor");
                }
                else
                {
                    if(gAgentID == chat.mFromID)
                    {
                        r_color = LLUIColorTable::instance().getColor("UserChatColor");
                    }
                    else
                    {
                        r_color = LLUIColorTable::instance().getColor("AgentChatColor");
                    }
                }
                break;
            case CHAT_SOURCE_OBJECT:
                if (chat.mChatType == CHAT_TYPE_DEBUG_MSG)
                {
                    r_color = LLUIColorTable::instance().getColor("ScriptErrorColor");
                }
                else if ( chat.mChatType == CHAT_TYPE_OWNER )
                {
                    r_color = LLUIColorTable::instance().getColor("llOwnerSayChatColor");
                }
                else if ( chat.mChatType == CHAT_TYPE_DIRECT )
                {
                    r_color = LLUIColorTable::instance().getColor("DirectChatColor");
                }
                else
                {
                    r_color = LLUIColorTable::instance().getColor("ObjectChatColor");
                }
                break;
            default:
                r_color.setToWhite();
        }

        if (!chat.mPosAgent.isExactlyZero())
        {
            LLVector3 pos_agent = gAgent.getPositionAgent();
            F32 distance_squared = dist_vec_squared(pos_agent, chat.mPosAgent);
            F32 dist_near_chat = gAgent.getNearChatRadius();
            if (distance_squared > dist_near_chat * dist_near_chat)
            {
                // diminish far-off chat
                r_color.mV[VALPHA] = 0.8f;
            }
        }
    }
}


//static
void LLViewerChat::getChatColor(const LLChat& chat, std::string& r_color_name, F32& r_color_alpha)
{
    if(chat.mMuted)
    {
        r_color_name = "LtGray";
    }
    else
    {
        switch(chat.mSourceType)
        {
            case CHAT_SOURCE_SYSTEM:
                r_color_name = "SystemChatColor";
                break;

            case CHAT_SOURCE_AGENT:
                if (chat.mFromID.isNull())
                {
                    r_color_name = "SystemChatColor";
                }
                else
                {
                    if(gAgentID == chat.mFromID)
                    {
                        r_color_name = "UserChatColor";
                    }
                    else
                    {
                        r_color_name = "AgentChatColor";
                    }
                }
                break;

            case CHAT_SOURCE_OBJECT:
                if (chat.mChatType == CHAT_TYPE_DEBUG_MSG)
                {
                    r_color_name = "ScriptErrorColor";
                }
                else if ( chat.mChatType == CHAT_TYPE_OWNER )
                {
                    r_color_name = "llOwnerSayChatColor";
                }
                else if ( chat.mChatType == CHAT_TYPE_DIRECT )
                {
                    r_color_name = "DirectChatColor";
                }
                else
                {
                    r_color_name = "ObjectChatColor";
                }
                break;
            default:
                r_color_name = "White";
        }

        if (!chat.mPosAgent.isExactlyZero())
        {
            LLVector3 pos_agent = gAgent.getPositionAgent();
            F32 distance_squared = dist_vec_squared(pos_agent, chat.mPosAgent);
            F32 dist_near_chat = gAgent.getNearChatRadius();
            if (distance_squared > dist_near_chat * dist_near_chat)
            {
                // diminish far-off chat
                r_color_alpha = 0.8f;
            }
            else
            {
                r_color_alpha = 1.0f;
            }
        }
    }

}


//static
LLFontGL* LLViewerChat::getChatFont()
{
    S32 font_size = gSavedSettings.getS32("ChatFontSize");
    LLFontGL* fontp = NULL;
    switch(font_size)
    {
        case 0:
            fontp = LLFontGL::getFontSansSerifSmall();
            break;
        default:
        case 1:
            fontp = LLFontGL::getFontSansSerif();
            break;
        case 2:
            fontp = LLFontGL::getFontSansSerifBig();
            break;
    }

    return fontp;

}

//static
S32 LLViewerChat::getChatFontSize()
{
    return gSavedSettings.getS32("ChatFontSize");
}


//static
void LLViewerChat::formatChatMsg(const LLChat& chat, std::string& formated_msg)
{
    std::string tmpmsg = without_LUA_PREFIX(chat.mText, chat.mIsScript);
    if(chat.mChatStyle == CHAT_STYLE_IRC)
    {
        formated_msg = chat.mFromName + tmpmsg.substr(3);
    }
    else
    {
        formated_msg = tmpmsg;
    }

    if (chat.mIsScript) 
    {
        formated_msg = LLTrans::getString("ScriptStr") + formated_msg;
    }

}

//static
std::string LLViewerChat::getSenderSLURL(const LLChat& chat, const LLSD& args)
{
    switch (chat.mSourceType)
    {
    case CHAT_SOURCE_AGENT:
        return LLSLURL("agent", chat.mFromID, "about").getSLURLString();

    case CHAT_SOURCE_OBJECT:
        return getObjectImSLURL(chat, args);

    default:
        LL_WARNS() << "Getting SLURL for an unsupported sender type: " << chat.mSourceType << LL_ENDL;
    }

    return LLStringUtil::null;
}

//static
std::string LLViewerChat::getObjectImSLURL(const LLChat& chat, const LLSD& args)
{
    std::string url = LLSLURL("objectim", chat.mFromID, "").getSLURLString();
    url += "?name=" + chat.mFromName;
    url += "&owner=" + chat.mOwnerID.asString();

    std::string slurl = args["slurl"].asString();
    if (slurl.empty())
    {
        LLViewerRegion *region = LLWorld::getInstance()->getRegionFromPosAgent(chat.mPosAgent);
        if(region)
        {
            LLSLURL region_slurl(region->getName(), chat.mPosAgent);
            slurl = region_slurl.getLocationString();
        }
    }

    url += "&slurl=" + LLURI::escape(slurl);

    return url;
}

//static
boost::signals2::connection LLViewerChat::setFontChangedCallback(const font_change_signal_t::slot_type& cb)
{
    return sChatFontChangedSignal.connect(cb);
}

//static
void LLViewerChat::signalChatFontChanged()
{
    // Notify all observers that our font has changed
    sChatFontChangedSignal(getChatFont());
}