/*
 * Copyright (C) by Klaas Freitag <freitag@owncloud.com>
 *
 * 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.
 */

#include "theme.h"
#include "config.h"
#include "common/utility.h"
#include "version.h"

#include <QtCore>
#ifndef TOKEN_AUTH_ONLY
#include <QtGui>
#include <QStyle>
#include <QApplication>
#endif
#include <QSslSocket>

#include "nextcloudtheme.h"

#ifdef THEME_INCLUDE
#define Mirall OCC // namespace hack to make old themes work
#define QUOTEME(M) #M
#define INCLUDE_FILE(M) QUOTEME(M)
#include INCLUDE_FILE(THEME_INCLUDE)
#undef Mirall
#endif

namespace OCC {

Theme *Theme::_instance = nullptr;

Theme *Theme::instance()
{
    if (!_instance) {
        _instance = new THEME_CLASS;
        // some themes may not call the base ctor
        _instance->_mono = false;
    }
    return _instance;
}

Theme::~Theme()
{
}

QString Theme::statusHeaderText(SyncResult::Status status) const
{
    QString resultStr;

    switch (status) {
    case SyncResult::Undefined:
        resultStr = QCoreApplication::translate("theme", "Status undefined");
        break;
    case SyncResult::NotYetStarted:
        resultStr = QCoreApplication::translate("theme", "Waiting to start sync");
        break;
    case SyncResult::SyncRunning:
        resultStr = QCoreApplication::translate("theme", "Sync is running");
        break;
    case SyncResult::Success:
        resultStr = QCoreApplication::translate("theme", "Sync Success");
        break;
    case SyncResult::Problem:
        resultStr = QCoreApplication::translate("theme", "Sync Success, some files were ignored.");
        break;
    case SyncResult::Error:
        resultStr = QCoreApplication::translate("theme", "Sync Error");
        break;
    case SyncResult::SetupError:
        resultStr = QCoreApplication::translate("theme", "Setup Error");
        break;
    case SyncResult::SyncPrepare:
        resultStr = QCoreApplication::translate("theme", "Preparing to sync");
        break;
    case SyncResult::SyncAbortRequested:
        resultStr = QCoreApplication::translate("theme", "Aborting...");
        break;
    case SyncResult::Paused:
        resultStr = QCoreApplication::translate("theme", "Sync is paused");
        break;
    }
    return resultStr;
}

QString Theme::appNameGUI() const
{
    return APPLICATION_NAME;
}

QString Theme::appName() const
{
    return APPLICATION_SHORTNAME;
}

QString Theme::version() const
{
    return MIRALL_VERSION_STRING;
}

QString Theme::configFileName() const
{
    return QStringLiteral(APPLICATION_EXECUTABLE ".cfg");
}

#ifndef TOKEN_AUTH_ONLY

QIcon Theme::applicationIcon() const
{
    return themeIcon(QStringLiteral(APPLICATION_ICON_NAME "-icon"));
}

/*
 * helper to load a icon from either the icon theme the desktop provides or from
 * the apps Qt resources.
 */
QIcon Theme::themeIcon(const QString &name, bool sysTray, bool sysTrayMenuVisible) const
{
    QString flavor;
    if (sysTray) {
        flavor = systrayIconFlavor(_mono, sysTrayMenuVisible);
    } else {
        flavor = QLatin1String("colored");
    }

    QString key = name + "," + flavor;
    QIcon &cached = _iconCache[key];
    if (cached.isNull()) {
        if (QIcon::hasThemeIcon(name)) {
            // use from theme
            return cached = QIcon::fromTheme(name);
        }

        QList<int> sizes;
        sizes << 16 << 22 << 32 << 48 << 64 << 128 << 256 << 512 << 1024;
        foreach (int size, sizes) {
            QString pixmapName = QString::fromLatin1(":/client/theme/%1/%2-%3.png").arg(flavor).arg(name).arg(size);
            if (QFile::exists(pixmapName)) {
                QPixmap px(pixmapName);
                // HACK, get rid of it by supporting FDO icon themes, this is really just emulating ubuntu-mono
                if (qgetenv("DESKTOP_SESSION") == "ubuntu") {
                    QBitmap mask = px.createMaskFromColor(Qt::white, Qt::MaskOutColor);
                    QPainter p(&px);
                    p.setPen(QColor("#dfdbd2"));
                    p.drawPixmap(px.rect(), mask, mask.rect());
                }
                cached.addPixmap(px);
            }
        }
        if (cached.isNull()) {
            foreach (int size, sizes) {
                QString pixmapName = QString::fromLatin1(":/client/resources/%1-%2.png").arg(name).arg(size);
                if (QFile::exists(pixmapName)) {
                    cached.addFile(pixmapName);
                }
            }
        }
    }

#ifdef Q_OS_MAC
#if QT_VERSION >= QT_VERSION_CHECK(5, 6, 0)
    // This defines the icon as a template and enables automatic macOS color handling
    // See https://bugreports.qt.io/browse/QTBUG-42109
    cached.setIsMask(_mono && sysTray && !sysTrayMenuVisible);
#endif
#endif

    return cached;
}

QString Theme::hidpiFileName(const QString &fileName, QPaintDevice *dev)
{
    qreal devicePixelRatio = dev ? dev->devicePixelRatio() : qApp->primaryScreen()->devicePixelRatio();
    if (devicePixelRatio <= 1.0) {
        return fileName;
    }
    // try to find a 2x version


    const int dotIndex = fileName.lastIndexOf(QLatin1Char('.'));
    if (dotIndex != -1) {
        QString at2xfileName = fileName;
        at2xfileName.insert(dotIndex, QStringLiteral("@2x"));
        if (QFile::exists(at2xfileName)) {
            return at2xfileName;
        }
    }
    return fileName;
}


#endif

Theme::Theme()
    : QObject(nullptr)
    , _mono(false)
{
}

// If this option returns true, the client only supports one folder to sync.
// The Add-Button is removed accordingly.
bool Theme::singleSyncFolder() const
{
    return false;
}

bool Theme::multiAccount() const
{
    return true;
}

QString Theme::defaultServerFolder() const
{
    return QLatin1String("/");
}

QString Theme::helpUrl() const
{
#ifdef APPLICATION_HELP_URL
    return QString::fromLatin1(APPLICATION_HELP_URL);
#else
    return QString::fromLatin1("https://docs.nextcloud.com/desktop/%1.%2/").arg(MIRALL_VERSION_MAJOR).arg(MIRALL_VERSION_MINOR);
#endif
}

QString Theme::conflictHelpUrl() const
{
    auto baseUrl = helpUrl();
    if (baseUrl.isEmpty())
        return QString();
    if (!baseUrl.endsWith('/'))
        baseUrl.append('/');
    return baseUrl + QStringLiteral("conflicts.html");
}

QString Theme::overrideServerUrl() const
{
#ifdef APPLICATION_SERVER_URL
    return QString::fromLatin1(APPLICATION_SERVER_URL);
#else
    return QString();
#endif
}

QString Theme::forceConfigAuthType() const
{
    return QString();
}


QString Theme::defaultClientFolder() const
{
    return appName();
}

QString Theme::systrayIconFlavor(bool mono, bool sysTrayMenuVisible) const
{
    Q_UNUSED(sysTrayMenuVisible)
    QString flavor;
    if (mono) {
        flavor = Utility::hasDarkSystray() ? QLatin1String("white") : QLatin1String("black");

#ifdef Q_OS_MAC
        if (sysTrayMenuVisible) {
            flavor = QLatin1String("white");
        }
#endif
    } else {
        flavor = QLatin1String("colored");
    }
    return flavor;
}

void Theme::setSystrayUseMonoIcons(bool mono)
{
    _mono = mono;
    emit systrayUseMonoIconsChanged(mono);
}

bool Theme::systrayUseMonoIcons() const
{
    return _mono;
}

bool Theme::monoIconsAvailable() const
{
    QString themeDir = QString::fromLatin1(":/client/theme/%1/").arg(Theme::instance()->systrayIconFlavor(true));
    return QDir(themeDir).exists();
}

QString Theme::updateCheckUrl() const
{
    return APPLICATION_UPDATE_URL;
}

qint64 Theme::newBigFolderSizeLimit() const
{
    // Default to 500MB
    return 500;
}

bool Theme::wizardHideExternalStorageConfirmationCheckbox() const
{
    return false;
}

bool Theme::wizardHideFolderSizeLimitCheckbox() const
{
    return false;
}

QString Theme::gitSHA1() const
{
    QString devString;
#ifdef GIT_SHA1
    const QString githubPrefix(QLatin1String(
        "https://github.com/nextcloud/desktop/commit/"));
    const QString gitSha1(QLatin1String(GIT_SHA1));
    devString = QCoreApplication::translate("nextcloudTheme::about()",
        "<p><small>Built from Git revision <a href=\"%1\">%2</a>"
        " on %3, %4 using Qt %5, %6</small></p>")
                    .arg(githubPrefix + gitSha1)
                    .arg(gitSha1.left(6))
                    .arg(__DATE__)
                    .arg(__TIME__)
                    .arg(qVersion())
                    .arg(QSslSocket::sslLibraryVersionString());
#endif
    return devString;
}

QString Theme::about() const
{
    QString devString;
    devString = tr("<p>Version %1. For more information please click <a href='%2'>here</a>.</p>")
              .arg(MIRALL_VERSION_STRING)
              .arg(helpUrl());

    devString += tr("<p>This release was supplied by %1</p>")
              .arg(APPLICATION_VENDOR);

    devString += gitSHA1();

    return devString;
}

#ifndef TOKEN_AUTH_ONLY
QVariant Theme::customMedia(CustomMediaType type)
{
    QVariant re;
    QString key;

    switch (type) {
    case oCSetupTop:
        key = QLatin1String("oCSetupTop");
        break;
    case oCSetupSide:
        key = QLatin1String("oCSetupSide");
        break;
    case oCSetupBottom:
        key = QLatin1String("oCSetupBottom");
        break;
    case oCSetupResultTop:
        key = QLatin1String("oCSetupResultTop");
        break;
    }

    QString imgPath = QString::fromLatin1(":/client/theme/colored/%1.png").arg(key);
    if (QFile::exists(imgPath)) {
        QPixmap pix(imgPath);
        if (pix.isNull()) {
            // pixmap loading hasn't succeeded. We take the text instead.
            re.setValue(key);
        } else {
            re.setValue(pix);
        }
    }
    return re;
}

QIcon Theme::syncStateIcon(SyncResult::Status status, bool sysTray, bool sysTrayMenuVisible) const
{
    // FIXME: Mind the size!
    QString statusIcon;

    switch (status) {
    case SyncResult::Undefined:
        // this can happen if no sync connections are configured.
        statusIcon = QLatin1String("state-warning");
        break;
    case SyncResult::NotYetStarted:
    case SyncResult::SyncRunning:
        statusIcon = QLatin1String("state-sync");
        break;
    case SyncResult::SyncAbortRequested:
    case SyncResult::Paused:
        statusIcon = QLatin1String("state-pause");
        break;
    case SyncResult::SyncPrepare:
    case SyncResult::Success:
        statusIcon = QLatin1String("state-ok");
        break;
    case SyncResult::Problem:
        statusIcon = QLatin1String("state-warning");
        break;
    case SyncResult::Error:
    case SyncResult::SetupError:
    // FIXME: Use state-problem once we have an icon.
    default:
        statusIcon = QLatin1String("state-error");
    }

    return themeIcon(statusIcon, sysTray, sysTrayMenuVisible);
}

QIcon Theme::folderDisabledIcon() const
{
    return themeIcon(QLatin1String("state-pause"));
}

QIcon Theme::folderOfflineIcon(bool sysTray, bool sysTrayMenuVisible) const
{
    return themeIcon(QLatin1String("state-offline"), sysTray, sysTrayMenuVisible);
}

QColor Theme::wizardHeaderTitleColor() const
{
    return QColor(APPLICATION_WIZARD_HEADER_TITLE_COLOR);
}

QColor Theme::wizardHeaderBackgroundColor() const
{
    return QColor(APPLICATION_WIZARD_HEADER_BACKGROUND_COLOR);
}

QPixmap Theme::wizardHeaderLogo() const
{
#ifdef APPLICATION_WIZARD_USE_CUSTOM_LOGO
   return QPixmap(hidpiFileName(":/client/theme/colored/wizard_logo.png"));
#else
    return applicationIcon().pixmap(64);
#endif
}

QPixmap Theme::wizardHeaderBanner() const
{
    QColor c = wizardHeaderBackgroundColor();
    if (!c.isValid())
        return QPixmap();

    QSize size(750, 78);
    if (auto screen = qApp->primaryScreen()) {
        // Adjust the the size if there is a different DPI. (Issue #6156)
        // Indeed, this size need to be big enough to for the banner height, and the wizard's width
        auto ratio = screen->logicalDotsPerInch() / 96.;
        if (ratio > 1.)
            size *= ratio;
    }
    QPixmap pix(size);
    pix.fill(wizardHeaderBackgroundColor());
    return pix;
}
#endif

bool Theme::wizardSelectiveSyncDefaultNothing() const
{
    return false;
}

QString Theme::webDavPath() const
{
    return QLatin1String("remote.php/webdav/");
}

QString Theme::webDavPathNonShib() const
{
    return QLatin1String("remote.php/nonshib-webdav/");
}

bool Theme::linkSharing() const
{
    return true;
}

bool Theme::userGroupSharing() const
{
    return true;
}

bool Theme::forceSystemNetworkProxy() const
{
    return false;
}

Theme::UserIDType Theme::userIDType() const
{
    return UserIDType::UserIDUserName;
}

QString Theme::customUserID() const
{
    return QString();
}

QString Theme::userIDHint() const
{
    return QString();
}


QString Theme::wizardUrlPostfix() const
{
    return QString();
}

QString Theme::wizardUrlHint() const
{
    return QString();
}

QString Theme::quotaBaseFolder() const
{
    return QLatin1String("/");
}

QString Theme::oauthClientId() const
{
    return "xdXOt13JKxym1B1QcEncf2XDkLAexMBFwiT9j6EfhhHFJhs2KM9jbjTmf8JBXE69";
}

QString Theme::oauthClientSecret() const
{
    return "UBntmLjC2yYCeHwsyj73Uwo9TAaecAetRwMw0xYcvNL9yRdLSUi0hUAHfvCHFeFh";
}

QString Theme::versionSwitchOutput() const
{
    QString helpText;
    QTextStream stream(&helpText);
    stream << appName()
           << QLatin1String(" version ")
           << version() << endl;
#ifdef GIT_SHA1
    stream << "Git revision " << GIT_SHA1 << endl;
#endif
    stream << "Using Qt " << qVersion() << ", built against Qt " << QT_VERSION_STR << endl;
    stream << "Using '" << QSslSocket::sslLibraryVersionString() << "'" << endl;
    return helpText;
}

} // end namespace client
