/*
   Copyright (C) 2001 Carsten Duvenhorst <duvenhorst@m2.uni-hannover.de>
   Copyright (C) 2005 Benjamin Meyer <ben at meyerhome dot net>

   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; either version 2 of the License, or
   (at your option) any later version.

   This program 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 General Public License for more details.

   You should have received a copy of the GNU General Public License
   along with this program; if not, write to the Free Software
   Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301,
   USA.
*/

#include "kcmaudiocd.h"
#include "audiocdplugins_version.h"

#include <QCheckBox>
#include <QLabel>
#include <QRegularExpression>
#include <QSlider>
#include <QTabWidget>
#include <QVBoxLayout>

#include <KAboutData>
#include <KConfigDialogManager>
#include <KConfigGroup>
#include <KLocalizedString>
#include <KPluginFactory>

#include <audiocdencoder.h>

K_PLUGIN_FACTORY(Factory, registerPlugin<KAudiocdModule>();)

KAudiocdModule::KAudiocdModule(QWidget *parent, const QVariantList &lst)
    : KCModule(parent)
{
    Q_UNUSED(lst);

    auto box = new QVBoxLayout(this);

    audioConfig = new AudiocdConfig(this);

    box->addWidget(audioConfig);
    setButtons(Default | Apply | Help);

    config = new KConfig(QStringLiteral("kcmaudiocdrc"));

    QList<AudioCDEncoder *> encoders;
    AudioCDEncoder::findAllPlugins(nullptr, encoders);
    for (AudioCDEncoder *encoder : std::as_const(encoders)) {
        if (encoder->init()) {
            KConfigSkeleton *config = nullptr;
            QWidget *widget = encoder->getConfigureWidget(&config);
            if (widget && config) {
                audioConfig->tabWidget->addTab(widget, i18n("%1 Encoder", encoder->type()));
                auto configManager = new KConfigDialogManager(widget, config);
                encoderSettings.append(configManager);
            }
        }
    }

    qDeleteAll(encoders);
    encoders.clear();

    for (int i = 0; i < encoderSettings.size(); ++i) {
        connect(encoderSettings.at(i), &KConfigDialogManager::widgetModified, this, &KAudiocdModule::slotModuleChanged);
    }

    // CDDA Options
    connect(audioConfig->ec_enable_check, &QCheckBox::clicked, this, &KAudiocdModule::slotEcEnable);
    connect(audioConfig->ec_skip_check, &QCheckBox::clicked, this, &KAudiocdModule::slotConfigChanged);
    connect(audioConfig->niceLevel, &QSlider::valueChanged, this, &KAudiocdModule::slotConfigChanged);

    // File Name
    connect(audioConfig->fileNameLineEdit, &QLineEdit::textChanged, this, &KAudiocdModule::slotConfigChanged);
    connect(audioConfig->albumNameLineEdit, &QLineEdit::textChanged, this, &KAudiocdModule::slotConfigChanged);
    connect(audioConfig->fileLocationLineEdit, &QLineEdit::textChanged, this, &KAudiocdModule::slotConfigChanged);
    connect(audioConfig->fileLocationGroupBox, &QGroupBox::clicked, this, &KAudiocdModule::slotConfigChanged);
    connect(audioConfig->kcfg_replaceInput, &QLineEdit::textChanged, this, &KAudiocdModule::updateExample);
    connect(audioConfig->kcfg_replaceOutput, &QLineEdit::textChanged, this, &KAudiocdModule::updateExample);
    connect(audioConfig->example, &QLineEdit::textChanged, this, &KAudiocdModule::updateExample);
    connect(audioConfig->kcfg_replaceInput, &QLineEdit::textChanged, this, &KAudiocdModule::slotConfigChanged);
    connect(audioConfig->kcfg_replaceOutput, &QLineEdit::textChanged, this, &KAudiocdModule::slotConfigChanged);
    connect(audioConfig->example, &QLineEdit::textChanged, this, &KAudiocdModule::slotConfigChanged);

    auto about = new KAboutData(QStringLiteral("kcmaudiocd"), i18n("KDE Audio CD IO Slave"), QStringLiteral(AUDIOCDPLUGINS_VERSION_STRING));

    about->addAuthor(i18n("Benjamin C. Meyer"), i18n("Former Maintainer"), QStringLiteral("ben@meyerhome.net"));
    about->addAuthor(i18n("Carsten Duvenhorst"), i18n("Original Author"), QStringLiteral("duvenhorst@duvnet.de"));
    setAboutData(about);
}

KAudiocdModule::~KAudiocdModule()
{
    delete config;
}

QString removeQoutes(const QString &text)
{
    QString deqoutedString = text;
    QRegularExpression qoutedStringRegExp(QStringLiteral("^\".*\"$"));
    QRegularExpressionMatch hasQuotes = qoutedStringRegExp.match(text);
    if (hasQuotes.hasMatch()) {
        deqoutedString = text.mid(1, text.length() - 2);
    }
    return deqoutedString;
}

bool needsQoutes(const QString &text)
{
    QRegularExpression spaceAtTheBeginning(QStringLiteral("^\\s+.*$"));
    QRegularExpression spaceAtTheEnd(QStringLiteral("^.*\\s+$"));
    QRegularExpressionMatch hasSpaceAtTheBeginning = spaceAtTheBeginning.match(text);
    QRegularExpressionMatch hasSpaceAtTheEnd = spaceAtTheEnd.match(text);
    return (hasSpaceAtTheBeginning.hasMatch() || hasSpaceAtTheEnd.hasMatch());
}

void KAudiocdModule::updateExample()
{
    QString text = audioConfig->example->text();

    const QString deqoutedReplaceInput = removeQoutes(audioConfig->kcfg_replaceInput->text());
    const QString deqoutedReplaceOutput = removeQoutes(audioConfig->kcfg_replaceOutput->text());
    text.replace(QRegularExpression(deqoutedReplaceInput), deqoutedReplaceOutput);
    audioConfig->exampleOutput->setText(text);
}

void KAudiocdModule::defaults() {
    audioConfig->ec_enable_check->setChecked(true);
    audioConfig->ec_skip_check->setChecked(false);
    audioConfig->niceLevel->setValue(0);

    audioConfig->kcfg_replaceInput->setText(QString());
    audioConfig->kcfg_replaceOutput->setText(QString());
    audioConfig->example->setText(i18n("Cool artist - example audio file.wav"));
    for (int i = 0; i < encoderSettings.size(); ++i) {
        encoderSettings.at(i)->updateWidgetsDefault();
    }

    audioConfig->fileNameLineEdit->setText(QStringLiteral("%{trackartist} - %{number} - %{title}"));
    audioConfig->albumNameLineEdit->setText(QStringLiteral("%{albumartist} - %{albumtitle}"));
}

void KAudiocdModule::save() {
    if (!configChanged)
        return;

    {
        KConfigGroup cg(config, "CDDA");

        cg.writeEntry("disable_paranoia", !(audioConfig->ec_enable_check->isChecked()));
        cg.writeEntry("never_skip", !(audioConfig->ec_skip_check->isChecked()));
        cg.writeEntry("niceLevel", audioConfig->niceLevel->value());
    }

  {
    KConfigGroup cg(config, "FileName");
    cg.writeEntry("file_name_template", audioConfig->fileNameLineEdit->text());
    cg.writeEntry("album_name_template", audioConfig->albumNameLineEdit->text());
    cg.writeEntry("show_file_location", audioConfig->fileLocationGroupBox->isChecked());
    cg.writeEntry("file_location_template", audioConfig->fileLocationLineEdit->text());
    cg.writeEntry("regexp_example", audioConfig->example->text());

    // save quoted if required
    QString replaceInput = audioConfig->kcfg_replaceInput->text();
    QString replaceOutput = audioConfig->kcfg_replaceOutput->text();
    if (needsQoutes(replaceInput)) {
        replaceInput = QLatin1Char('\"') + replaceInput + QLatin1Char('\"');
    }
    if (needsQoutes(replaceOutput)) {
        replaceOutput = QLatin1Char('\"') + replaceOutput + QLatin1Char('\"');
    }
    cg.writeEntry("regexp_search", replaceInput);
    cg.writeEntry("regexp_replace", replaceOutput);
  }

  for (int i = 0; i < encoderSettings.size(); ++i) {
      encoderSettings.at(i)->updateSettings();
  }

  config->sync();

  configChanged = false;
}

void KAudiocdModule::load() {

  {
    KConfigGroup cg(config, "CDDA");

    audioConfig->ec_enable_check->setChecked(!(cg.readEntry("disable_paranoia", false)));
    audioConfig->ec_skip_check->setChecked(!(cg.readEntry("never_skip", true)));
    audioConfig->niceLevel->setValue(cg.readEntry("niceLevel", 0));
  }

  {
    KConfigGroup cg(config, "FileName");
    audioConfig->fileNameLineEdit->setText(cg.readEntry("file_name_template", "%{trackartist} - %{number} - %{title}"));
    audioConfig->albumNameLineEdit->setText(cg.readEntry("album_name_template", "%{albumartist} - %{albumtitle}"));
    audioConfig->fileLocationGroupBox->setChecked(cg.readEntry("show_file_location", false));
    audioConfig->fileLocationLineEdit->setText(cg.readEntry("file_location_template", QString()));
    audioConfig->kcfg_replaceInput->setText(cg.readEntry("regexp_search"));
    audioConfig->kcfg_replaceOutput->setText(cg.readEntry("regexp_replace"));
    audioConfig->example->setText(cg.readEntry("example", i18n("Cool artist - example audio file.wav")));
  }

  for (int i = 0; i < encoderSettings.size(); ++i) {
      encoderSettings.at(i)->updateWidgets();
  }
}

void KAudiocdModule::slotModuleChanged() {
    for (int i = 0; i < encoderSettings.size(); ++i) {
        KConfigDialogManager *widget = encoderSettings.at(i);
        if (widget->hasChanged()) {
            slotConfigChanged();
            break;
        }
    }
}

void KAudiocdModule::slotConfigChanged() {
    configChanged = true;
    Q_EMIT changed(true);
}

/*
#    slot for the error correction settings
*/
void KAudiocdModule::slotEcEnable() {
  if (!(audioConfig->ec_skip_check->isChecked())) {
    audioConfig->ec_skip_check->setChecked(true);
  } else {
    if (audioConfig->ec_skip_check->isEnabled()) {
      audioConfig->ec_skip_check->setChecked(false);
    }
  }

  slotConfigChanged();
}

QString KAudiocdModule::quickHelp() const
{
    return i18n(
        "<h1>Audio CDs</h1> The Audio CD IO-Slave enables you to easily"
        " create wav, FLAC, MP3, Ogg Vorbis or Opus files from your "
        "audio CD-ROMs or DVDs."
        " The slave is invoked by typing <i>\"audiocd:/\"</i> in "
        "Dolphin's location"
        " bar. In this module, you can configure"
        " encoding, and device settings. Note that FLAC, MP3, Ogg Vorbis,"
        " and Opus encoding are only available if the corresponding "
        "libraries (libFLAC for"
        " FLAC and libvorbis for Ogg) and utilities (lame for MP3 and "
        "opus-tools for Opus)"
        " are installed in your system.");
}

#include "kcmaudiocd.moc"
