#include "streamingpreferences.h"

#include <QSettings>
#include <QTranslator>
#include <QCoreApplication>
#include <QLocale>

#include <QtDebug>

#define SER_STREAMSETTINGS "streamsettings"
#define SER_WIDTH "width"
#define SER_HEIGHT "height"
#define SER_FPS "fps"
#define SER_BITRATE "bitrate"
#define SER_FULLSCREEN "fullscreen"
#define SER_VSYNC "vsync"
#define SER_GAMEOPTS "gameopts"
#define SER_HOSTAUDIO "hostaudio"
#define SER_MULTICONT "multicontroller"
#define SER_AUDIOCFG "audiocfg"
#define SER_VIDEOCFG "videocfg"
#define SER_VIDEODEC "videodec"
#define SER_WINDOWMODE "windowmode"
#define SER_UNSUPPORTEDFPS "unsupportedfps"
#define SER_MDNS "mdns"
#define SER_QUITAPPAFTER "quitAppAfter"
#define SER_ABSMOUSEMODE "mouseacceleration"
#define SER_ABSTOUCHMODE "abstouchmode"
#define SER_STARTWINDOWED "startwindowed"
#define SER_FRAMEPACING "framepacing"
#define SER_CONNWARNINGS "connwarnings"
#define SER_UIDISPLAYMODE "uidisplaymode"
#define SER_RICHPRESENCE "richpresence"
#define SER_GAMEPADMOUSE "gamepadmouse"
#define SER_DEFAULTVER "defaultver"
#define SER_PACKETSIZE "packetsize"
#define SER_DETECTNETBLOCKING "detectnetblocking"
#define SER_SWAPMOUSEBUTTONS "swapmousebuttons"
#define SER_MUTEONFOCUSLOSS "muteonfocusloss"
#define SER_BACKGROUNDGAMEPAD "backgroundgamepad"
#define SER_REVERSESCROLL "reversescroll"
#define SER_SWAPFACEBUTTONS "swapfacebuttons"
#define SER_CAPTURESYSKEYS "capturesyskeys"
#define SER_LANGUAGE "language"

#define CURRENT_DEFAULT_VER 1

StreamingPreferences::StreamingPreferences(QObject *parent)
    : QObject(parent),
      m_QmlEngine(nullptr)
{
    reload();
}

StreamingPreferences::StreamingPreferences(QQmlEngine *qmlEngine, QObject *parent)
    : QObject(parent),
      m_QmlEngine(qmlEngine)
{
    reload();
}

void StreamingPreferences::reload()
{
    QSettings settings;

    int defaultVer = settings.value(SER_DEFAULTVER, 0).toInt();

#ifdef Q_OS_DARWIN
    recommendedFullScreenMode = WindowMode::WM_FULLSCREEN_DESKTOP;
#else
    recommendedFullScreenMode = WindowMode::WM_FULLSCREEN;
#endif

    width = settings.value(SER_WIDTH, 1280).toInt();
    height = settings.value(SER_HEIGHT, 720).toInt();
    fps = settings.value(SER_FPS, 60).toInt();
    bitrateKbps = settings.value(SER_BITRATE, getDefaultBitrate(width, height, fps)).toInt();
    enableVsync = settings.value(SER_VSYNC, true).toBool();
    gameOptimizations = settings.value(SER_GAMEOPTS, true).toBool();
    playAudioOnHost = settings.value(SER_HOSTAUDIO, false).toBool();
    multiController = settings.value(SER_MULTICONT, true).toBool();
    unsupportedFps = settings.value(SER_UNSUPPORTEDFPS, false).toBool();
    enableMdns = settings.value(SER_MDNS, true).toBool();
    quitAppAfter = settings.value(SER_QUITAPPAFTER, false).toBool();
    absoluteMouseMode = settings.value(SER_ABSMOUSEMODE, false).toBool();
    absoluteTouchMode = settings.value(SER_ABSTOUCHMODE, true).toBool();
    framePacing = settings.value(SER_FRAMEPACING, false).toBool();
    connectionWarnings = settings.value(SER_CONNWARNINGS, true).toBool();
    richPresence = settings.value(SER_RICHPRESENCE, true).toBool();
    gamepadMouse = settings.value(SER_GAMEPADMOUSE, true).toBool();
    detectNetworkBlocking = settings.value(SER_DETECTNETBLOCKING, true).toBool();
    packetSize = settings.value(SER_PACKETSIZE, 0).toInt();
    swapMouseButtons = settings.value(SER_SWAPMOUSEBUTTONS, false).toBool();
    muteOnFocusLoss = settings.value(SER_MUTEONFOCUSLOSS, false).toBool();
    backgroundGamepad = settings.value(SER_BACKGROUNDGAMEPAD, false).toBool();
    reverseScrollDirection = settings.value(SER_REVERSESCROLL, false).toBool();
    swapFaceButtons = settings.value(SER_SWAPFACEBUTTONS, false).toBool();
    captureSysKeys = settings.value(SER_CAPTURESYSKEYS, false).toBool();
    audioConfig = static_cast<AudioConfig>(settings.value(SER_AUDIOCFG,
                                                  static_cast<int>(AudioConfig::AC_STEREO)).toInt());
    videoCodecConfig = static_cast<VideoCodecConfig>(settings.value(SER_VIDEOCFG,
                                                  static_cast<int>(VideoCodecConfig::VCC_AUTO)).toInt());
    videoDecoderSelection = static_cast<VideoDecoderSelection>(settings.value(SER_VIDEODEC,
                                                  static_cast<int>(VideoDecoderSelection::VDS_AUTO)).toInt());
    windowMode = static_cast<WindowMode>(settings.value(SER_WINDOWMODE,
                                                        // Try to load from the old preference value too
                                                        static_cast<int>(settings.value(SER_FULLSCREEN, true).toBool() ?
                                                                             recommendedFullScreenMode : WindowMode::WM_WINDOWED)).toInt());
    uiDisplayMode = static_cast<UIDisplayMode>(settings.value(SER_UIDISPLAYMODE,
                                               static_cast<int>(settings.value(SER_STARTWINDOWED, true).toBool() ? UIDisplayMode::UI_WINDOWED
                                                                                                                 : UIDisplayMode::UI_MAXIMIZED)).toInt());
    language = static_cast<Language>(settings.value(SER_LANGUAGE,
                                                    static_cast<int>(Language::LANG_AUTO)).toInt());


    // Perform default settings updates as required based on last default version
    if (defaultVer == 0) {
#ifdef Q_OS_DARWIN
        // Update window mode setting on macOS from full-screen (old default) to borderless windowed (new default)
        if (windowMode == WindowMode::WM_FULLSCREEN) {
            windowMode = WindowMode::WM_FULLSCREEN_DESKTOP;
        }
#endif
    }
}

bool StreamingPreferences::retranslate()
{
    static QTranslator* translator = nullptr;

#if QT_VERSION < QT_VERSION_CHECK(5, 10, 0)
    if (m_QmlEngine != nullptr) {
        // Dynamic retranslation is not supported until Qt 5.10
        return false;
    }
#endif

    QTranslator* newTranslator = new QTranslator();
    QString languageSuffix = getSuffixFromLanguage(language);

    // Remove the old translator, even if we can't load a new one.
    // Otherwise we'll be stuck with the old translated values instead
    // of defaulting to English.
    if (translator != nullptr) {
        QCoreApplication::removeTranslator(translator);
        delete translator;
        translator = nullptr;
    }

    if (newTranslator->load(QString(":/languages/qml_") + languageSuffix)) {
        qInfo() << "Successfully loaded translation for " << languageSuffix;

        translator = newTranslator;
        QCoreApplication::installTranslator(translator);
    }
    else {
        qInfo() << "No translation available for " << languageSuffix;
        delete newTranslator;
    }

    if (m_QmlEngine != nullptr) {
#if QT_VERSION >= QT_VERSION_CHECK(5, 10, 0)
        // This is a dynamic retranslation from the settings page.
        // We have to kick the QML engine into reloading our text.
        m_QmlEngine->retranslate();
#else
        // Unreachable below Qt 5.10 due to the check above
        Q_ASSERT(false);
#endif
    }
    else {
        // This is a translation from a non-QML context, which means
        // it is probably app startup. There's nothing to refresh.
    }

    return true;
}

QString StreamingPreferences::getSuffixFromLanguage(StreamingPreferences::Language lang)
{
    switch (lang)
    {
    case LANG_EN:
        return "en";
    case LANG_FR:
        return "fr";
    case LANG_ZH_CN:
        return "zh_cn";
    case LANG_AUTO:
    default:
        return QLocale::system().name();
    }
}

void StreamingPreferences::save()
{
    QSettings settings;

    settings.setValue(SER_WIDTH, width);
    settings.setValue(SER_HEIGHT, height);
    settings.setValue(SER_FPS, fps);
    settings.setValue(SER_BITRATE, bitrateKbps);
    settings.setValue(SER_VSYNC, enableVsync);
    settings.setValue(SER_GAMEOPTS, gameOptimizations);
    settings.setValue(SER_HOSTAUDIO, playAudioOnHost);
    settings.setValue(SER_MULTICONT, multiController);
    settings.setValue(SER_UNSUPPORTEDFPS, unsupportedFps);
    settings.setValue(SER_MDNS, enableMdns);
    settings.setValue(SER_QUITAPPAFTER, quitAppAfter);
    settings.setValue(SER_ABSMOUSEMODE, absoluteMouseMode);
    settings.setValue(SER_ABSTOUCHMODE, absoluteTouchMode);
    settings.setValue(SER_FRAMEPACING, framePacing);
    settings.setValue(SER_CONNWARNINGS, connectionWarnings);
    settings.setValue(SER_RICHPRESENCE, richPresence);
    settings.setValue(SER_GAMEPADMOUSE, gamepadMouse);
    settings.setValue(SER_PACKETSIZE, packetSize);
    settings.setValue(SER_DETECTNETBLOCKING, detectNetworkBlocking);
    settings.setValue(SER_AUDIOCFG, static_cast<int>(audioConfig));
    settings.setValue(SER_VIDEOCFG, static_cast<int>(videoCodecConfig));
    settings.setValue(SER_VIDEODEC, static_cast<int>(videoDecoderSelection));
    settings.setValue(SER_WINDOWMODE, static_cast<int>(windowMode));
    settings.setValue(SER_UIDISPLAYMODE, static_cast<int>(uiDisplayMode));
    settings.setValue(SER_LANGUAGE, static_cast<int>(language));
    settings.setValue(SER_DEFAULTVER, CURRENT_DEFAULT_VER);
    settings.setValue(SER_SWAPMOUSEBUTTONS, swapMouseButtons);
    settings.setValue(SER_MUTEONFOCUSLOSS, muteOnFocusLoss);
    settings.setValue(SER_BACKGROUNDGAMEPAD, backgroundGamepad);
    settings.setValue(SER_REVERSESCROLL, reverseScrollDirection);
    settings.setValue(SER_SWAPFACEBUTTONS, swapFaceButtons);
    settings.setValue(SER_CAPTURESYSKEYS, captureSysKeys);
}

int StreamingPreferences::getDefaultBitrate(int width, int height, int fps)
{
    // This table prefers 16:10 resolutions because they are
    // only slightly more pixels than the 16:9 equivalents, so
    // we don't want to bump those 16:10 resolutions up to the
    // next 16:9 slot.

    if (width * height <= 640 * 360) {
        return static_cast<int>(1000 * (fps / 30.0));
    }
    else if (width * height <= 854 * 480) {
        return static_cast<int>(1500 * (fps / 30.0));
    }
    // This covers 1280x720 and 1280x800 too
    else if (width * height <= 1366 * 768) {
        return static_cast<int>(5000 * (fps / 30.0));
    }
    else if (width * height <= 1920 * 1200) {
        return static_cast<int>(10000 * (fps / 30.0));
    }
    else if (width * height <= 2560 * 1600) {
        return static_cast<int>(20000 * (fps / 30.0));
    }
    else /* if (width * height <= 3840 * 2160) */ {
        return static_cast<int>(40000 * (fps / 30.0));
    }
}