/**
 * @file llviewerparcelmediaautoplay.cpp
 * @brief timer to automatically play media in a parcel
 *
 * $LicenseInfo:firstyear=2007&license=viewerlgpl$
 * 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 "llviewerparcelmediaautoplay.h"

#include "llparcel.h"
#include "llviewercontrol.h"
#include "llviewermedia.h"
#include "llviewerparcelaskplay.h"
#include "llviewerparcelmedia.h"
#include "llviewerparcelmgr.h"
#include "llviewerregion.h"
#include "llviewertexturelist.h"         // for texture stats
#include "message.h"
#include "llagent.h"
#include "llmimetypes.h"

const F32 AUTOPLAY_TIME  = 5;          // how many seconds before we autoplay
const F32 AUTOPLAY_SIZE  = 24*24;      // how big the texture must be (pixel area) before we autoplay
const F32 AUTOPLAY_SPEED = 0.1f;        // how slow should the agent be moving to autoplay

LLViewerParcelMediaAutoPlay::LLViewerParcelMediaAutoPlay() :
    LLEventTimer(1),

    mLastParcelID(-1),
    mPlayed(FALSE),
    mTimeInParcel(0)
{
}

// static
void LLViewerParcelMediaAutoPlay::playStarted()
{
    LLSingleton<LLViewerParcelMediaAutoPlay>::getInstance()->mPlayed = TRUE;
}

bool LLViewerParcelMediaAutoPlay::tick()
{
    LLParcel *this_parcel = NULL;
    LLViewerRegion *this_region = NULL;
    std::string this_media_url;
    std::string this_media_type;
    LLUUID this_media_texture_id;
    S32 this_parcel_id = 0;
    LLUUID this_region_id;

    this_region = gAgent.getRegion();

    if (this_region)
    {
        this_region_id = this_region->getRegionID();
    }

    this_parcel = LLViewerParcelMgr::getInstance()->getAgentParcel();

    if (this_parcel)
    {
        this_media_url = this_parcel->getMediaURL();

        this_media_type = this_parcel->getMediaType();

        this_media_texture_id = this_parcel->getMediaID();

        this_parcel_id = this_parcel->getLocalID();
    }

    if (this_parcel_id != mLastParcelID ||
        this_region_id != mLastRegionID)
    {
        // we've entered a new parcel
        mPlayed    = FALSE;                   // we haven't autoplayed yet
        mTimeInParcel = 0;                    // reset our timer
        mLastParcelID = this_parcel_id;
        mLastRegionID = this_region_id;
    }

    mTimeInParcel += mPeriod;                   // increase mTimeInParcel by the amount of time between ticks

    if ((!mPlayed) &&                           // if we've never played
        (mTimeInParcel > AUTOPLAY_TIME) &&      // and if we've been here for so many seconds
        (!this_media_url.empty()) &&            // and if the parcel has media
        (stricmp(this_media_type.c_str(), LLMIMETypes::getDefaultMimeType().c_str()) != 0) &&
        (!LLViewerParcelMedia::getInstance()->hasParcelMedia()))    // and if the media is not already playing
    {
        if (this_media_texture_id.notNull())    // and if the media texture is good
        {
            LLViewerMediaTexture *image = LLViewerTextureManager::getMediaTexture(this_media_texture_id, FALSE) ;

            F32 image_size = 0;

            if (image)
            {
                image_size = image->getMaxVirtualSize() ;
            }

            if (gAgent.getVelocity().magVec() < AUTOPLAY_SPEED) // and if the agent is stopped (slow enough)
            {
                if (image_size > AUTOPLAY_SIZE)    // and if the target texture is big enough on screen
                {
                    if (this_parcel)
                    {
                        static LLCachedControl<S32> autoplay_mode(gSavedSettings, "ParcelMediaAutoPlayEnable");

                        switch (autoplay_mode())
                        {
                            case 0:
                                // Disabled
                                break;
                            case 1:
                                // Play, default value for ParcelMediaAutoPlayEnable
                                LLViewerParcelMedia::getInstance()->play(this_parcel);
                                break;
                            case 2:
                            default:
                            {
                                // Ask
                                LLViewerParcelAskPlay::getInstance()->askToPlay(this_region->getRegionID(),
                                                                                this_parcel->getLocalID(),
                                                                                this_parcel->getMediaURL(),
                                                                                onStartMediaResponse);
                                break;
                            }
                        }
                    }

                    mPlayed = TRUE;
                }
            }
        }
    }


    return false; // continue ticking forever please.
}

//static
void LLViewerParcelMediaAutoPlay::onStartMediaResponse(const LLUUID &region_id, const S32 &parcel_id, const std::string &url, const bool &play)
{
    if (play)
    {
        LLParcel *parcel = LLViewerParcelMgr::getInstance()->getAgentParcel();

        // make sure we are still there
        if (parcel->getLocalID() == parcel_id && gAgent.getRegion()->getRegionID() == region_id)
        {
            LLViewerParcelMedia::getInstance()->play(parcel);
        }
    }
}