#include "audiotagger.h"

#include <QtDebug>
#include <taglib/tag.h>
#include <taglib/id3v2frame.h>

#include <taglib/id3v2frame.h>
#include <taglib/id3v2header.h>
#include <taglib/id3v1tag.h>
#include <taglib/tmap.h>
#include <taglib/tstringlist.h>

#include <taglib/vorbisfile.h>
#include <taglib/wavpackfile.h>
#include <taglib/mpegfile.h>
#include <taglib/mp4file.h>
#include <taglib/oggfile.h>
#include <taglib/flacfile.h>
#include <taglib/aifffile.h>
#include <taglib/rifffile.h>
#include <taglib/wavfile.h>
#include <taglib/textidentificationframe.h>

#ifdef _WIN32
static_assert(sizeof(wchar_t) == sizeof(QChar), "wchar_t is not the same size than QChar");
#define TAGLIB_FILENAME_FROM_QSTRING(fileName) (const wchar_t*)fileName.utf16()
// Note: we cannot use QString::toStdWString since QT 4 is compiled with
// '/Zc:wchar_t-' flag and QT 5 not
#else
#define TAGLIB_FILENAME_FROM_QSTRING(fileName) (fileName).toLocal8Bit().constData()
#endif // _WIN32

AudioTagger::AudioTagger(const QString& file, SecurityTokenPointer pToken)
        : m_file(file),
          m_pSecurityToken(pToken.isNull() ? Sandbox::openSecurityToken(
                  m_file, true) : pToken) {
}

AudioTagger::~AudioTagger() {
}

void AudioTagger::setArtist(QString artist) {
    m_artist = artist;
}

void AudioTagger::setTitle(QString title) {
    m_title = title;
}

void AudioTagger::setAlbum(QString album) {
    m_album = album;
}

void AudioTagger::setAlbumArtist (QString albumArtist) {
    m_albumArtist = albumArtist;
}

void AudioTagger::setGenre (QString genre) {
    m_genre = genre;
}

void AudioTagger::setComposer(QString composer) {
    m_composer = composer;
}

void AudioTagger::setGrouping (QString grouping) {
    m_grouping = grouping;
}

void AudioTagger::setYear (QString year) {
    m_year = year;
}

void AudioTagger::setComment(QString comment) {
    m_comment = comment;
}

void AudioTagger::setKey(QString key) {
    m_key = key;
}

void AudioTagger::setBpm(QString bpm) {
    m_bpm = bpm;
}

void AudioTagger::setTracknumber(QString tracknumber) {
    m_tracknumber = tracknumber;
}

bool AudioTagger::save() {
    TagLib::File* file = NULL;

    const QString& filePath = m_file.canonicalFilePath();

    if (filePath.endsWith(".mp3", Qt::CaseInsensitive)) {
        file = new TagLib::MPEG::File(TAGLIB_FILENAME_FROM_QSTRING(filePath));
        // process special ID3 fields, APEv2 fiels, etc

        // If the mp3 has no ID3v2 tag, we create a new one and add the TBPM and TKEY frame
        addID3v2Tag(((TagLib::MPEG::File*) file)->ID3v2Tag(true));
        // If the mp3 has an APE tag, we update
        addAPETag(((TagLib::MPEG::File*) file)->APETag(false));
    }

    if (filePath.endsWith(".m4a", Qt::CaseInsensitive)) {
        file = new TagLib::MP4::File(TAGLIB_FILENAME_FROM_QSTRING(filePath));
        // process special ID3 fields, APEv2 fiels, etc
        processMP4Tag(((TagLib::MP4::File*) file)->tag());

    }
    if (filePath.endsWith(".ogg", Qt::CaseInsensitive)) {
        file = new TagLib::Ogg::Vorbis::File(TAGLIB_FILENAME_FROM_QSTRING(filePath));
        // process special ID3 fields, APEv2 fiels, etc
        addXiphComment(((TagLib::Ogg::Vorbis::File*)file)->tag());

    }
    if (filePath.endsWith(".wav", Qt::CaseInsensitive)) {
        file = new TagLib::RIFF::WAV::File(TAGLIB_FILENAME_FROM_QSTRING(filePath));
        //If the flac has no ID3v2 tag, we create a new one and add the TBPM and TKEY frame
        addID3v2Tag(((TagLib::RIFF::WAV::File*)file)->tag());

    }
    if (filePath.endsWith(".flac", Qt::CaseInsensitive)) {
        file = new TagLib::FLAC::File(TAGLIB_FILENAME_FROM_QSTRING(filePath));

        //If the flac has no ID3v2 tag, we create a new one and add the TBPM and TKEY frame
        addID3v2Tag(((TagLib::FLAC::File*)file)->ID3v2Tag(true));
        //If the flac has no APE tag, we create a new one and add the TBPM and TKEY frame
        addXiphComment(((TagLib::FLAC::File*) file)->xiphComment(true));

    }
    if (filePath.endsWith(".aif", Qt::CaseInsensitive) ||
            filePath.endsWith(".aiff", Qt::CaseInsensitive)) {
        file = new TagLib::RIFF::AIFF::File(TAGLIB_FILENAME_FROM_QSTRING(filePath));
        //If the flac has no ID3v2 tag, we create a new one and add the TBPM and TKEY frame
        addID3v2Tag(((TagLib::RIFF::AIFF::File*)file)->tag());

    }

    //process standard tags
    if (file) {
        TagLib::Tag *tag = file->tag();
        if (tag) {
            tag->setArtist(m_artist.toStdString());
            tag->setTitle(m_title.toStdString());
            tag->setAlbum(m_album.toStdString());
            tag->setGenre(m_genre.toStdString());
            tag->setComment(m_comment.toStdString());
            uint year =  m_year.toUInt();
            if (year >  0)
                tag->setYear(year);
            uint tracknumber = m_tracknumber.toUInt();
            if (tracknumber > 0)
                tag->setTrack(tracknumber);

        }
        //write audio tags to file
        int success = file->save();
        if (success) {
            qDebug() << "Successfully updated metadata of track " << filePath;
        } else {
            qDebug() << "Could not update metadata of track " << filePath;
        }
        //delete file and return
        delete file;
        return success;
    } else {
        return false;
    }
}

void AudioTagger::addID3v2Tag(TagLib::ID3v2::Tag* id3v2) {
    if (!id3v2)
        return;

    TagLib::ID3v2::FrameList albumArtistFrame = id3v2->frameListMap()["TPE2"];
    if (!albumArtistFrame.isEmpty()) {
        albumArtistFrame.front()->setText(m_albumArtist.toStdString());
    } else {
        //add new frame
        TagLib::ID3v2::TextIdentificationFrame* newFrame =
                new TagLib::ID3v2::TextIdentificationFrame(
                    "TPE2", TagLib::String::Latin1);
        newFrame->setText(m_albumArtist.toStdString());
        id3v2->addFrame(newFrame);
    }

    TagLib::ID3v2::FrameList bpmFrame = id3v2->frameListMap()["TBPM"];
    if (!bpmFrame.isEmpty()) {
        bpmFrame.front()->setText(m_bpm.toStdString());
    } else {
         // add new frame TextIdentificationFrame which is responsible for TKEY and TBPM
         // see http://developer.kde.org/~wheeler/taglib/api/classTagLib_1_1ID3v2_1_1TextIdentificationFrame.html

        TagLib::ID3v2::TextIdentificationFrame* newFrame = new TagLib::ID3v2::TextIdentificationFrame("TBPM", TagLib::String::Latin1);

        newFrame->setText(m_bpm.toStdString());
        id3v2->addFrame(newFrame);

    }

    TagLib::ID3v2::FrameList keyFrame = id3v2->frameListMap()["TKEY"];
    if (!keyFrame.isEmpty()) {
        keyFrame.front()->setText(m_key.toStdString());
    } else {
        //add new frame
        TagLib::ID3v2::TextIdentificationFrame* newFrame = new TagLib::ID3v2::TextIdentificationFrame("TKEY", TagLib::String::Latin1);

        newFrame->setText(m_key.toStdString());
        id3v2->addFrame(newFrame);

    }

    TagLib::ID3v2::FrameList composerFrame = id3v2->frameListMap()["TCOM"];
    if (!composerFrame.isEmpty()) {
        composerFrame.front()->setText(m_composer.toStdString());
    } else {
        //add new frame
        TagLib::ID3v2::TextIdentificationFrame* newFrame =
                new TagLib::ID3v2::TextIdentificationFrame(
                    "TCOM", TagLib::String::Latin1);
        newFrame->setText(m_composer.toStdString());
        id3v2->addFrame(newFrame);
    }

    TagLib::ID3v2::FrameList groupingFrame = id3v2->frameListMap()["TIT1"];
    if (!groupingFrame.isEmpty()) {
        groupingFrame.front()->setText(m_grouping.toStdString());
    } else {
        //add new frame
        TagLib::ID3v2::TextIdentificationFrame* newFrame =
                new TagLib::ID3v2::TextIdentificationFrame(
                    "TIT1", TagLib::String::Latin1);
        newFrame->setText(m_grouping.toStdString());
        id3v2->addFrame(newFrame);
    }
}

void AudioTagger::addAPETag(TagLib::APE::Tag* ape) {
    if (!ape)
        return;
    // Adds to the item specified by key the data value.
    // If replace is true, then all of the other values on the same key will be removed first.
    ape->addValue("BPM",m_bpm.toStdString(), true);
    ape->addValue("Album Artist",m_albumArtist.toStdString(), true);
    ape->addValue("Composer",m_composer.toStdString(), true);
    ape->addValue("Grouping",m_grouping.toStdString(), true);

}

void AudioTagger::addXiphComment(TagLib::Ogg::XiphComment* xiph) {
    if (!xiph)
        return;

    // Taglib does not support the update of Vorbis comments.
    // thus, we have to reomve the old comment and add the new one

    xiph->removeField("ALBUMARTIST");
    xiph->addField("ALBUMARTIST", m_albumArtist.toStdString());

    // Some tools use "BPM" so write that.
    xiph->removeField("BPM");
    xiph->addField("BPM", m_bpm.toStdString());
    xiph->removeField("TEMPO");
    xiph->addField("TEMPO", m_bpm.toStdString());

    xiph->removeField("INITIALKEY");
    xiph->addField("INITIALKEY", m_key.toStdString());
    xiph->removeField("KEY");
    xiph->addField("KEY", m_key.toStdString());

    xiph->removeField("COMPOSER");
    xiph->addField("COMPOSER", m_composer.toStdString());

    xiph->removeField("GROUPING");
    xiph->addField("GROUPING", m_grouping.toStdString());
}

void AudioTagger::processMP4Tag(TagLib::MP4::Tag* mp4) {
    mp4->itemListMap()["aART"] = TagLib::StringList(m_albumArtist.toStdString());
    mp4->itemListMap()["tmpo"] = TagLib::StringList(m_bpm.toStdString());
    mp4->itemListMap()["----:com.apple.iTunes:BPM"] = TagLib::StringList(m_bpm.toStdString());
    mp4->itemListMap()["----:com.apple.iTunes:KEY"] = TagLib::StringList(m_key.toStdString());
    mp4->itemListMap()["\251wrt"] = TagLib::StringList(m_composer.toStdString());
    mp4->itemListMap()["\251grp"] = TagLib::StringList(m_grouping.toStdString());
}