/**
 * @file llgroupiconctrl.cpp
 * @brief LLGroupIconCtrl class implementation
 *
 * $LicenseInfo:firstyear=2009&license=viewerlgpl$
 * 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 "llgroupiconctrl.h"

#include "llagent.h"
#include "llviewertexture.h"

static LLDefaultChildRegistry::Register<LLGroupIconCtrl> g_i("group_icon");

LLGroupIconCtrl::Params::Params()
:   group_id("group_id"),
    draw_tooltip("draw_tooltip", true),
    default_icon_name("default_icon_name")
{
    changeDefault(min_width, 32);
    changeDefault(min_height, 32);
}


LLGroupIconCtrl::LLGroupIconCtrl(const LLGroupIconCtrl::Params& p)
:   LLIconCtrl(p),
    mGroupId(LLUUID::null),
    mDrawTooltip(p.draw_tooltip),
    mDefaultIconName(p.default_icon_name)
{
    mPriority = LLViewerFetchedTexture::BOOST_ICON;

    // don't request larger image then necessary to save gl memory,
    // but ensure that quality is sufficient
    LLRect rect = p.rect;
    mMaxHeight = llmax((S32)p.min_height, rect.getHeight());
    mMaxWidth = llmax((S32)p.min_width, rect.getWidth());

    if (p.group_id.isProvided())
    {
        LLSD value(p.group_id);
        setValue(value);
    }
    else
    {
        //TODO: Consider implementing dedicated setDefault() function instead of passing priority for local file
        LLIconCtrl::setValue(mDefaultIconName, LLViewerFetchedTexture::BOOST_UI);
    }
}

LLGroupIconCtrl::~LLGroupIconCtrl()
{
    LLGroupMgr::getInstance()->removeObserver(this);
}

void LLGroupIconCtrl::setIconId(const LLUUID& icon_id)
{
    if (icon_id.notNull())
    {
        LLIconCtrl::setValue(icon_id);
    }
    else
    {
        LLIconCtrl::setValue(mDefaultIconName, LLViewerFetchedTexture::BOOST_UI);
    }
}

void LLGroupIconCtrl::setValue(const LLSD& value)
{
    if (value.isUUID())
    {
        LLGroupMgr* gm = LLGroupMgr::getInstance();
        if (mGroupId.notNull())
        {
            gm->removeObserver(this);
        }

        if (mGroupId != value.asUUID())
        {
            mGroupId = value.asUUID();
            mID = mGroupId; // set LLGroupMgrObserver::mID to make callbacks work

            // Check if cache already contains image_id for that group
            if (!updateFromCache())
            {
                LLIconCtrl::setValue(mDefaultIconName, LLViewerFetchedTexture::BOOST_UI);
                gm->addObserver(this);
                gm->sendGroupPropertiesRequest(mGroupId);
            }
        }
    }
    else
    {
        LLIconCtrl::setValue(value);
    }
}

void LLGroupIconCtrl::changed(LLGroupChange gc)
{
    if (GC_PROPERTIES == gc)
    {
        updateFromCache();
    }
}

bool LLGroupIconCtrl::updateFromCache()
{
    LLGroupMgrGroupData* group_data = LLGroupMgr::getInstance()->getGroupData(mGroupId);
    if (!group_data) return false;

    setIconId(group_data->mInsigniaID);

    if (mDrawTooltip && !group_data->mName.empty())
    {
        setToolTip(group_data->mName);
    }
    else
    {
        setToolTip(LLStringUtil::null);
    }
    return true;
}