#include "maindialog.h"

#include <QApplication>
#include <QLibraryInfo>
#include <QTextCodec>
#include <QTranslator>
#include <QCommandLineParser>
#include <QtDBus>
#include <QMessageBox>
#include <QDesktopWidget>
#include <KWindowEffects>

#include <unistd.h>
#include "qtsingleapplication/qtsingleapplication.h"
#include "../common/utils.h"
#include "xatom-helper.h"
#include "globalbackupinfo.h"

// 声明
void initApp(QApplication& a);
bool isManager();
void centerToScreen(QWidget* widget);

int main(int argc, char *argv[])
{
#if (QT_VERSION >= QT_VERSION_CHECK(5, 6, 0))
    QCoreApplication::setAttribute(Qt::AA_EnableHighDpiScaling);
    QCoreApplication::setAttribute(Qt::AA_UseHighDpiPixmaps);
#endif

#if (QT_VERSION >= QT_VERSION_CHECK(5, 14, 0))
    QApplication::setHighDpiScaleFactorRoundingPolicy(Qt::HighDpiScaleFactorRoundingPolicy::PassThrough);
#endif

    QtSingleApplication a ("kybackup",argc, argv);
    initApp(a);

    // 当前只支持管理员用户使用备份还原工具
    GlobelBackupInfo::inst().setIsManager(isManager());
    if (!GlobelBackupInfo::inst().isManager() && GlobelBackupInfo::inst().hasArgRestore()) {
        QMessageBox box(QMessageBox::Warning, QObject::tr("Warning"), QObject::tr("This tool can only be used by administrator."));
        box.setStandardButtons(QMessageBox::Ok);
        box.setButtonText(QMessageBox::Ok, QObject::tr("OK"));
        QIcon titleIcon = QIcon::fromTheme(THEME_YHKYLIN_BACKUP_TOOLS);
        box.setWindowIcon(titleIcon);
        box.exec();
        return EXIT_FAILURE;
    }

    if (a.isRunning()) {
        QString strUid = QString::number(getuid());
        QString ack = a.sendMessage(strUid, 3000);

        if (strUid != ack) {
            QMessageBox box(QMessageBox::Critical, QObject::tr("Error"), QObject::tr("Another user had opened kybackup, you can not start it again."));
            box.setStandardButtons(QMessageBox::Ok);
            box.setButtonText(QMessageBox::Ok, QObject::tr("OK"));
            QIcon titleIcon = QIcon::fromTheme(THEME_YHKYLIN_BACKUP_TOOLS);
            box.setWindowIcon(titleIcon);
            box.exec();
        }

        return EXIT_SUCCESS;
    }

    MainDialog w;
    // 居中窗口
    centerToScreen(&w);
    // 窗口背景透明化；setWindowOpacity可使得窗口及其上控件都透明或半透明-w.setWindowOpacity(0.7);
    w.setAttribute(Qt::WA_TranslucentBackground);
    // 使得窗口无边框
    // w.setWindowFlag(Qt::FramelessWindowHint);
    // 指示窗口管理器模糊给定窗口后面指定区域的背景(毛玻璃化背景)
    KWindowEffects::enableBlurBehind(w.winId(), true);

    // 添加窗管协议
    MotifWmHints hints;
    hints.flags = MWM_HINTS_FUNCTIONS | MWM_HINTS_DECORATIONS;
    hints.functions = MWM_FUNC_ALL;
    hints.decorations = MWM_DECOR_BORDER;
    XAtomHelper::getInstance()->setWindowMotifHint(w.winId(), hints);

    a.setWindowIcon(QIcon::fromTheme(THEME_YHKYLIN_BACKUP_TOOLS));
    a.setActivationWindow(&w, true);

    //如果是第一个实例,则绑定,方便下次调用
    QObject::connect(&a,SIGNAL(messageReceived(const QString&)),&w,SLOT(sltMessageReceived(const QString&)));

    w.show();
    return a.exec();
}

/**
 * @brief 应用初始化
 * @param a
 * @note  new出来的两个QTranslator不用删除，需要整个生命周期内有效，应用结束由操作系统收回即可
 */
void initApp(QApplication& a)
{
    //前端向后端传递QString参数，若参数中含有中文则保证不会乱码
    QTextCodec::setCodecForLocale(QTextCodec::codecForName("UTF-8"));

    //区分中英文
    QString locale = QLocale::system().name();
    //QT自身标准的翻译
#ifndef QT_NO_TRANSLATION
    QString translatorFileName = QLatin1String("qt_");
    translatorFileName += locale;
    QTranslator *selfTransOfQt = new QTranslator();
    if (selfTransOfQt->load(translatorFileName, QLibraryInfo::location(QLibraryInfo::TranslationsPath)))
        a.installTranslator(selfTransOfQt);
    else
        qDebug() << "load qt translator file failed!";
#endif

    //应用内的翻译
    QTranslator *translator = new QTranslator();
    if (locale == "zh_CN") {
        //中文需要翻译
        if (!translator->load(":/qm/images/qt_zh_CN.qm")) //qtcreator启动后看到在资源目录下
            qDebug() << "load translator file failed!";
        else
            a.installTranslator(translator);
    }

    // 命令行参数
    QCoreApplication::setApplicationName(QObject::tr("kybackup"));
    QCoreApplication::setApplicationVersion("4.0.14");

    QCommandLineParser parser;
    parser.setApplicationDescription("kybackup helper");
    parser.addHelpOption();
    parser.addVersionOption();
    // 启动后进入的页面
    QCommandLineOption functionOption(QStringList() << "r" << "restore", QCoreApplication::translate("restore", "system restore"));
    parser.addOption(functionOption);
    parser.process(a);
    GlobelBackupInfo::inst().setHasArgRestore(parser.isSet(functionOption));

    QString qsAppPath = QCoreApplication::applicationDirPath();
    Utils::initSysRootPath(qsAppPath);
}

/**
 * @brief 判断启动账号是否管理员账号
 * @return true-相当于是；false-不是
 */
bool isManager()
{
    QString rootPath = Utils::getSysRootPath();
    // 只正常启动程序时需校验是否管理员账号启动
    if ("/" != rootPath)
        return true;

    uid_t uid = getuid();
    // root用户
    if (0 == uid)
        return true;

    QString sid = QString::number(uid);
    QString userObject = "/org/freedesktop/Accounts/User" + sid;

    // 创建QDBusInterface
    QDBusInterface iface("org.freedesktop.Accounts", userObject, "org.freedesktop.DBus.Properties", QDBusConnection::systemBus());
    if (!iface.isValid()) {
        qDebug() << qPrintable(QDBusConnection::systemBus().lastError().message());
        exit(1);
    }

    int result = 0;
    QDBusReply<QDBusVariant> reply = iface.call("Get", QString("org.freedesktop.Accounts.User"), QString("AccountType"));
    if (reply.isValid()) {
        QVariant val = reply.value().variant();
        result = val.toInt();
    }

    return 0 == result ? false : true;
}

/**
 * @brief 居中显示窗口
 * @param widget
 */
void centerToScreen(QWidget* widget)
{
    if (!widget)
      return;
    QDesktopWidget* m = QApplication::desktop();
    // QRect desk_rect = m->screenGeometry(m->screenNumber(QCursor::pos()));
    QRect desk_rect = m->screenGeometry(widget);
    int desk_x = desk_rect.width();
    int desk_y = desk_rect.height();
    int x = widget->width();
    int y = widget->height();
    widget->move(desk_x / 2 - x / 2 + desk_rect.left(), desk_y / 2 - y / 2 + desk_rect.top());
}