/**
 * @file llviewermedia_streamingaudio.h
 * @author Tofu Linden, Sam Kolb
 * @brief LLStreamingAudio_MediaPlugins implementation - an implementation of the streaming audio interface which is implemented as a client of the media plugin API.
 *
 * $LicenseInfo:firstyear=2009&license=viewerlgpl$
 * 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 "linden_common.h"
#include "llpluginclassmedia.h"
#include "llpluginclassmediaowner.h"
#include "llviewermedia.h"

#include "llviewermedia_streamingaudio.h"

#include "llmimetypes.h"
#include "lldir.h"
#include "llnotificationmanager.h"

LLStreamingAudio_MediaPlugins::LLStreamingAudio_MediaPlugins() :
    mMediaPlugin(NULL),
    mGain(1.0)
{
    // nothing interesting to do?
    // we will lazily create a media plugin at play-time, if none exists.
}

LLStreamingAudio_MediaPlugins::~LLStreamingAudio_MediaPlugins()
{
    delete mMediaPlugin;
    mMediaPlugin = NULL;
}

void LLStreamingAudio_MediaPlugins::start(const std::string& url)
{
    if (!mMediaPlugin) // lazy-init the underlying media plugin
    {
        mMediaPlugin = initializeMedia("audio/mpeg"); // assumes that whatever media implementation supports mp3 also supports vorbis.
        LL_INFOS() << "streaming audio mMediaPlugin is now " << mMediaPlugin << LL_ENDL;
    }

    if(!mMediaPlugin)
        return;

    if (!url.empty()) {
        LL_INFOS() << "Starting internet stream: " << url << LL_ENDL;
        mURL = url;
        mMediaPlugin->loadURI ( url );
        mMediaPlugin->start();
        LL_INFOS() << "Playing stream..." << LL_ENDL;
    } else {
        LL_INFOS() << "setting stream to NULL"<< LL_ENDL;
        mURL.clear();
        mMediaPlugin->stop();
        delete mMediaPlugin;
        mMediaPlugin = nullptr;
    }
}

void LLStreamingAudio_MediaPlugins::stop()
{
    LL_INFOS() << "Stopping internet stream." << LL_ENDL;
    if(mMediaPlugin)
    {
        mMediaPlugin->stop();
        delete mMediaPlugin;
        mMediaPlugin = nullptr;
    }

    mURL.clear();
}

void LLStreamingAudio_MediaPlugins::pause(int pause)
{
    if(!mMediaPlugin)
        return;

    if(pause)
    {
        LL_INFOS() << "Pausing internet stream." << LL_ENDL;
        mMediaPlugin->pause();
    }
    else
    {
        LL_INFOS() << "Unpausing internet stream." << LL_ENDL;
        mMediaPlugin->start();
    }
}

void LLStreamingAudio_MediaPlugins::update()
{
    if (mMediaPlugin)
        mMediaPlugin->idle();
}

extern void send_chat_from_viewer(const std::string& utf8_out_text, EChatType type, S32 channel);

int LLStreamingAudio_MediaPlugins::isPlaying()
{
    if (!mMediaPlugin)
        return 0; // stopped

    LLPluginClassMediaOwner::EMediaStatus status =
        mMediaPlugin->getStatus();
    auto nowPlaying = mMediaPlugin->getMediaNowPlaying();
    if (mNowPlaying != nowPlaying)
    {
        mTitle = mMediaPlugin->getMediaTitle();
        mNowPlaying = nowPlaying;
        auto text = llformat("Now playing %s.", nowPlaying.c_str());
        if (gSavedSettings.getBOOL("StreamNotificationChannelEnabled"))
        {
            send_chat_from_viewer(text, CHAT_TYPE_NORMAL, gSavedSettings.getS32("StreamNotificationChannel"));
        }
        else
        {
            LLChat chat{text};
            chat.mFromName = mTitle;
            chat.mSourceType = CHAT_SOURCE_SYSTEM;
            LLNotificationsUI::LLNotificationManager::instance().onChat(chat, LLSD{});
        }
    }

    switch (status)
    {
    case LLPluginClassMediaOwner::MEDIA_LOADING: // but not MEDIA_LOADED
    case LLPluginClassMediaOwner::MEDIA_PLAYING:
        return 1; // Active and playing
    case LLPluginClassMediaOwner::MEDIA_PAUSED:
        return 2; // paused
    default:
        return 0; // stopped
    }
}

void LLStreamingAudio_MediaPlugins::setGain(F32 vol)
{
    mGain = vol;

    if(!mMediaPlugin)
        return;

    vol = llclamp(vol, 0.f, 1.f);
    mMediaPlugin->setVolume(vol);
}

F32 LLStreamingAudio_MediaPlugins::getGain()
{
    return mGain;
}

std::string LLStreamingAudio_MediaPlugins::getURL()
{
    return mURL;
}

LLPluginClassMedia* LLStreamingAudio_MediaPlugins::initializeMedia(const std::string& media_type)
{
    LLPluginClassMediaOwner* owner = NULL;
    S32 default_size = 1; // audio-only - be minimal, doesn't matter
    F64 default_zoom = 1.0;
    LLPluginClassMedia* media_source = LLViewerMediaImpl::newSourceFromMediaType(media_type, owner, default_size, default_size, default_zoom);

    if (media_source)
    {
        media_source->setLoop(false); // audio streams are not expected to loop
    }

    return media_source;
}