/***************************************************************************
 *             __________               __   ___.
 *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
 *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
 *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
 *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
 *                     \/            \/     \/    \/            \/
 *
 *   Copyright (C) 2007 by Dominik Wenger
 *   $Id$
 *
 * All files in this archive are subject to the GNU General Public License.
 * See the file COPYING in the source tree root for full license agreement.
 *
 * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
 * KIND, either express or implied.
 *
 ****************************************************************************/

#include "talkgenerator.h"
#include "rbsettings.h"
#include "systeminfo.h"
#include "wavtrim.h"

TalkGenerator::TalkGenerator(QObject* parent): QObject(parent)
{

}

//! \brief Creates Talkfiles.
//!
TalkGenerator::Status TalkGenerator::process(QList<TalkEntry>* list,int wavtrimth)
{
    m_abort = false;
    QString errStr;
    bool warnings = false;

    //tts
    emit logItem(tr("Starting TTS Engine"),LOGINFO);
    m_tts = TTSBase::getTTS(this,RbSettings::value(RbSettings::Tts).toString());
    if(!m_tts->start(&errStr))
    {
        emit logItem(errStr.trimmed(),LOGERROR);
        emit logItem(tr("Init of TTS engine failed"),LOGERROR);
        emit done(true);
        return eERROR;
    }
    QCoreApplication::processEvents();

    // Encoder
    emit logItem(tr("Starting Encoder Engine"),LOGINFO);
    m_enc = EncBase::getEncoder(this,SystemInfo::value(SystemInfo::CurEncoder).toString());
    if(!m_enc->start())
    {
        emit logItem(tr("Init of Encoder engine failed"),LOGERROR);
        emit done(true);
        m_tts->stop();
        return eERROR;
    }
    QCoreApplication::processEvents();

    emit logProgress(0,0);

    // Voice entries
    emit logItem(tr("Voicing entries..."),LOGINFO);
    Status voiceStatus= voiceList(list,wavtrimth);
    if(voiceStatus == eERROR)
    {
        m_tts->stop();
        m_enc->stop();
        emit done(true);
        return eERROR;
    }
    else if( voiceStatus == eWARNING)
        warnings = true;

    QCoreApplication::processEvents();

    // Encoding Entries
    emit logItem(tr("Encoding files..."),LOGINFO);
    Status encoderStatus = encodeList(list);
    if( encoderStatus == eERROR)
    {
        m_tts->stop();
        m_enc->stop();
        emit done(true);
        return eERROR;
    }
    else if( voiceStatus == eWARNING)
        warnings = true;

    QCoreApplication::processEvents();

    m_tts->stop();
    m_enc->stop();
    emit logProgress(1,1);

    if(warnings)
        return eWARNING;
    return eOK;
}

//! \brief Voices a List of string
//!
TalkGenerator::Status TalkGenerator::voiceList(QList<TalkEntry>* list,int wavtrimth)
{
    int progressMax = list->size();
    int m_progress = 0;
    emit logProgress(m_progress,progressMax);

    QStringList errors;
    QStringList dublicates;

    bool warnings = false;
    for(int i=0; i < list->size(); i++)
    {
        if(m_abort)
        {
            emit logItem(tr("Voicing aborted"), LOGERROR);
            return eERROR;
        }

        // skip dublicated wav entrys
        if(!dublicates.contains(list->at(i).wavfilename))
            dublicates.append(list->at(i).wavfilename);
        else
        {
            qDebug() << "dublicate skipped";
            (*list)[i].voiced = true;
            emit logProgress(++m_progress,progressMax);
            continue;
        }

        // skip already voiced entrys
        if(list->at(i).voiced == true)
        {
            emit logProgress(++m_progress,progressMax);
            continue;
        }
        // skip entry whith empty text
        if(list->at(i).toSpeak == "")
        {
            emit logProgress(++m_progress,progressMax);
            continue;
        }

        // voice entry
        QString error;
        qDebug() << "voicing: " << list->at(i).toSpeak << "to" << list->at(i).wavfilename;
        TTSStatus status = m_tts->voice(list->at(i).toSpeak,list->at(i).wavfilename, &error);
        if(status == Warning)
        {
            warnings = true;
            emit logItem(tr("Voicing of %1 failed: %2").arg(list->at(i).toSpeak).arg(error),
                    LOGWARNING);
        }
        else if (status == FatalError)
        {
            emit logItem(tr("Voicing of %1 failed: %2").arg(list->at(i).toSpeak).arg(error),
                    LOGERROR);
            return eERROR;
        }
        else
           (*list)[i].voiced = true;

        //wavetrim if needed
        if(wavtrimth != -1)
        {
            char buffer[255];
            wavtrim(list->at(i).wavfilename.toLocal8Bit().data(),wavtrimth,buffer,255);
        }

        emit logProgress(++m_progress,progressMax);
        QCoreApplication::processEvents();
    }
    if(warnings)
        return eWARNING;
    else
        return eOK;
}


//! \brief Encodes a List of strings
//!
TalkGenerator::Status TalkGenerator::encodeList(QList<TalkEntry>* list)
{
    QStringList dublicates;

    int progressMax = list->size();
    int m_progress = 0;
    emit logProgress(m_progress,progressMax);

    for(int i=0; i < list->size(); i++)
    {
        if(m_abort)
        {
            emit logItem(tr("Encoding aborted"), LOGERROR);
            return eERROR;
        }

         //skip non-voiced entrys
        if(list->at(i).voiced == false)
        {
            qDebug() << "non voiced entry" << list->at(i).toSpeak <<"detected";
            emit logProgress(++m_progress,progressMax);
            continue;
        }
        //skip dublicates
         if(!dublicates.contains(list->at(i).talkfilename))
            dublicates.append(list->at(i).talkfilename);
        else
        {
            qDebug() << "dublicate skipped";
            (*list)[i].encoded = true;
            emit logProgress(++m_progress,progressMax);
            continue;
        }

        //encode entry
        qDebug() << "encoding " << list->at(i).wavfilename << "to" << list->at(i).talkfilename;
        if(!m_enc->encode(list->at(i).wavfilename,list->at(i).talkfilename))
        {
            emit logItem(tr("Encoding of %1 failed").arg(list->at(i).wavfilename), LOGERROR);
            return eERROR;
        }
        (*list)[i].encoded = true;
        emit logProgress(++m_progress,progressMax);
        QCoreApplication::processEvents();
    }
    return eOK;
}

//! \brief slot, which is connected to the abort of the Logger. Sets a flag, so Creating Talkfiles ends at the next possible position
//!
void TalkGenerator::abort()
{
    m_abort = true;
}