/**********************************************************************************
*    @file       SetupFuncLinux.cpp
*    @brief      Linux系统设置函数
*    @author     yikenan
*    @versiong   1.0
*    @date       
**********************************************************************************/

//< 仅在Linux系统下编译
#ifdef OS_LINUX

#include <QtCore>
#include "SetupFunc.h"
#include "setupCommon.h"
#include <QStandardPaths>
#include <QProcess>

namespace iot_sys
{

QString getDesktopPath()
{
    QString username = qgetenv("SUDO_USER");
    QProcess process;
    QString cmd = QString("su %1 -c \"xdg-user-dir DESKTOP\"").arg(username);
    process.start(cmd);
    process.waitForFinished(-1); // will wait forever until finished

    QString stdout = process.readAllStandardOutput().trimmed();
    if( strcmp(g_iscs6000_os,"oe2203_aarch64") == 0 && stdout.isEmpty() )
    {
        return QString("/home/%1/Desktop").arg(username);
    }
    else
    {
        return stdout;
    }
}

static const char *pszSystemdCfgFile = "/usr/lib/systemd/system/iscs6000_launcher.service";

//< 前面需加上用户HOME目录路径
static const char *pszXdgCfgDir = "/.config/autostart/";
static const char *pszXdgCfgFile = "iscs6000_hmi_explorer.desktop";
static const char *pszDesktopEntryDirName = "iscs6000";
static const char *pszAppDir = "/usr/share/applications";
const QString desktopDir = getDesktopPath();


//< 注册系统服务，并设置自启动
bool regSysService(QString &strErr,QString path)
{
    //< 判断服务是否已注册，普通用户权限可执行
    if (0 == QProcess::execute("systemctl is-enabled iscs6000_launcher.service"))
    {
        strErr = QObject::tr("已设置服务自启动，若需重新设置，请先取消！");
        return false;
    }

    const QString strExec = path + "/platform/" + g_platform_dir_name +  "/sys_launcher_srv";

    //< 判断文件存在并设置可执行权限
    if (QFile::exists(strExec))
    {
        if(QFileDevice::ExeOther !=
                (QFileDevice::ExeOther & QFile::permissions(strExec)))
        {
            QString strCmd = "chmod +x ";
            strCmd += strExec;
            if(0 != QProcess::execute(strCmd))
            {
                strErr = QObject::tr("设置可执行权限失败！") + "\n" + strExec;
                return false;
            }
        }
    }
    else
    {
        strErr = QObject::tr("文件不存在！")+ "\n" + strExec;
        return false;
    }

    //< 生成或修改systemd服务配置文件
    {
        QSettings objIniSetting(pszSystemdCfgFile, QSettings::IniFormat);
        objIniSetting.setIniCodec( QTextCodec::codecForLocale() );

        if (!objIniSetting.isWritable())
        {
            strErr = QObject::tr("服务配置文件不可写，请确认是否具有权限！")
                    + "\n" + pszSystemdCfgFile;
            return false;
        }

        //< 清空所有原有配置
        objIniSetting.setFallbacksEnabled(false);
        objIniSetting.clear();

        objIniSetting.beginGroup("Unit");
        objIniSetting.setValue("Description", "iscs6000_launcher");
        objIniSetting.setValue("After", "network.target");
        objIniSetting.endGroup();

        objIniSetting.beginGroup("Service");
        objIniSetting.setValue("Type", "simple");
        objIniSetting.setValue("ExecStart", strExec);
        objIniSetting.setValue("KillMode", "process");
        objIniSetting.setValue("Restart", "on-failure");
        objIniSetting.setValue("RestartSec", "42s");
        QString username = qgetenv("SUDO_USER");
        if( !username.isEmpty() )
        {
            objIniSetting.setValue("User",username);
        }

        objIniSetting.endGroup();

        objIniSetting.beginGroup("Install");
        objIniSetting.setValue("WantedBy", "multi-user.target");
        objIniSetting.endGroup();

        if (QSettings::NoError != objIniSetting.status())
        {
            strErr = QObject::tr("写入服务配置文件失败！")
                    + "\n" + pszSystemdCfgFile;
            return false;
        }
    }

    //< systemd重新加载配置文件
    if (0 != QProcess::execute("systemctl daemon-reload"))
    {
        strErr = QObject::tr("调用系统重新加载配置失败！");
        return false;
    }

    //< 设置服务开机自启动
    if (0 != QProcess::execute("systemctl enable iscs6000_launcher.service"))
    {
        strErr = QObject::tr("设置服务开机自启动失败！");
        return false;
    }

    return true;
}

//----------------------------------------

//< 设置HMI自启动
bool setHmiAutoStart(QString &strErr,QString path)
{
    QString sudo_user = qgetenv("SUDO_USER");
    QString user = qgetenv("USER");

    QString strCfgFileDir;
    if(user == "root" && sudo_user.isEmpty())
    {
        strCfgFileDir = "/root";
        sudo_user = "root";
    }
    else
    {
        strCfgFileDir = QString("/home/%1").arg(sudo_user);
    }
    strCfgFileDir +=  pszXdgCfgDir;

    const QString strCfgFileFullPath = strCfgFileDir + pszXdgCfgFile;

    if (QFile::exists(strCfgFileFullPath))
    {
        strErr = QObject::tr("已设置HMI自启动，若需重新设置，请先取消！");
        return false;
    }

    const QString strExec = path + "/product/" + g_platform_dir_name + "/sys_startup";

    //< 判断文件存在并设置可执行权限
    if (QFile::exists(strExec))
    {
        if(QFileDevice::ExeOther !=
                (QFileDevice::ExeOther & QFile::permissions(strExec)))
        {
            QString strCmd = "chmod +x ";
            strCmd += strExec;
            if(0 != QProcess::execute(strCmd))
            {
                strErr = QObject::tr("设置可执行权限失败！")
                        + "\n" + strExec;
                return false;
            }
        }
    }
    else
    {
        strErr = QObject::tr("文件不存在！") + "\n" + strExec;
        return false;
    }

    /*
    启动器中的Group “Desktop Entry”，中间带有空格
    而QSettings对于Group、Key都是强制转URL的，于是空格变成 %20
    可是这样的写法，xdg不认
    所以，不使用QSettings
    */

    //< 生成或复写启动器文件
    {
        //< 防止路径不存在，先建立
        QDir objDir(strCfgFileDir);
        if(!objDir.exists())
        {
            objDir.mkpath(strCfgFileDir);
        }

        QFile objFile(strCfgFileFullPath);
        if (!objFile.open(QIODevice::WriteOnly | QIODevice::Text))
        {
            strErr = QObject::tr("启动器文件不可写，请确认是否具有权限！")
                    + "\n" + strCfgFileFullPath;
            return false;
        }

        {
            QTextStream objStreamOut(&objFile);
            objStreamOut << "[Desktop Entry]" << endl;
            objStreamOut << "Name=iscs6000_hmi_explorer" << endl;
            objStreamOut << "Exec=" << strExec << endl;
            objStreamOut << "Type=Application" << endl;
            objStreamOut << "X-GNOME-AutoRestart=false" << endl;
        }

        objFile.close();
    }
    QString stFilePerm = QString("chown -R %1:%1 %2").arg(sudo_user).arg(strCfgFileDir);
    system(stFilePerm.toStdString().c_str());
    return true;
}


//----------------------------------------
class CDesktopEntry
{
public:
    QString desktopName;
    QString name;
    QString comment;
    QString exec;
    QString icon;
    CDesktopEntry(const QString destopName_,const QString name_, const QString comment_, const QString exec_, const QString icon_=""):
        desktopName(destopName_),
        name(name_),
        comment(comment_),
        exec(exec_),
        icon(icon_)
    {
    }

};


bool createDesktopEntry(const QString &entrypath, const CDesktopEntry &entry, QString &strErr,bool isRoot = true)
{

    const QString entryFileFullPath = entrypath + "/" + entry.desktopName + ".desktop";

    //< 生成desktop文件
    {
        QFile objFile(entryFileFullPath);
        if (!objFile.open(QIODevice::WriteOnly | QIODevice::Text))
        {
            strErr = QObject::tr("快捷方式不可写，请确认是否具有权限！")
                    + "\n" + entryFileFullPath;
            return false;
        }
        {
            QTextStream objStreamOut(&objFile);
            objStreamOut << "[Desktop Entry]" << endl;
            objStreamOut << "Name=" << entry.name << endl;
            objStreamOut << "Exec=sh -c \"export LD_LIBRARY_PATH=$LD_LIBRARY_PATH:/opt/Qt5.9.9/5.9.9/gcc_64/lib;" << entry.exec << "\"" <<endl;
            objStreamOut << "Comment=" << entry.comment << endl;
            if(entry.icon != "")
                objStreamOut << "Icon=" << entry.icon << endl;
            objStreamOut << "Type=Application" << endl;
            objStreamOut << "Categories=GNOME;Application;Other;Settings" << endl;
        }

        objFile.close();
    }
    QString chmodStr = QString("chmod +x ") + entryFileFullPath;
    system(chmodStr.toStdString().c_str());
    if(!isRoot)
    {
        QString username = qgetenv("SUDO_USER");
        QString chownStr = QString("chown %1 ").arg(username) + entryFileFullPath;
        system(chownStr.toStdString().c_str());

    }

    return true;
}



//< 创建快捷方式
bool creatShortcut(QString &strErr,QString path)
{
    //<todo yikenan 路径需改动
    const QString execProdDir = path + "/product/"  + g_platform_dir_name;
    const QString execPlatDir = path + "/platform/" + g_platform_dir_name;


    const QString iconDir = path + "/product/common/resource/zh/setup/icons";
    QDir appDir(pszAppDir);
    appDir.mkdir(pszDesktopEntryDirName);
    QString appDestPath = appDir.absoluteFilePath(pszDesktopEntryDirName);
    if(!QDir(appDestPath).exists())
    {
        strErr = appDestPath + QObject::tr("不存在或无法创建");
        return false;
    }

    createDesktopEntry(desktopDir,CDesktopEntry("sys_startup",QObject::tr("实时监控"),"iscs6000 system management",execProdDir+"/sys_startup",iconDir + "/sys_startup.ico"),strErr,false);


    return true;
}


bool createStartProgram(QString &strErr,const QString& path)
{
    //<todo yikenan 路径需改动
    const QString execProdDir = path + "/product/"  + g_platform_dir_name;
    const QString execPlatDir = path + "/platform/" + g_platform_dir_name;


    const QString iconDir = path + "/product/common/resource/zh/setup/icons";
    QDir appDir(pszAppDir);
    appDir.mkdir(pszDesktopEntryDirName);
    QString appDestPath = appDir.absoluteFilePath(pszDesktopEntryDirName);
    if(!QDir(appDestPath).exists())
    {
        strErr = appDestPath + QObject::tr("不存在或无法创建");
        return false;
    }

    createDesktopEntry(appDestPath,CDesktopEntry("sys_dog_auth_check", QObject::tr("超级狗检查"), "check system dog authentication",execProdDir+"/sys_dog_auth_check"),strErr);
    createDesktopEntry(appDestPath,CDesktopEntry("FesSim", QObject::tr("前置调试"),"iscs6000 fes debug tool",execProdDir+"/FesSim",iconDir + "/fes_sim.ico"),strErr);
    createDesktopEntry(appDestPath,CDesktopEntry("debug_tool", QObject::tr("工程调试工具"),"iscs6000 debug tool",execProdDir+"/debug_tool",iconDir + "/debug_tool.ico"),strErr);
    createDesktopEntry(appDestPath,CDesktopEntry("sys_command",QObject::tr("命令窗口"),"iscs6000 bin exec environment",execProdDir+"/sys_command.sh"),strErr);
    createDesktopEntry(appDestPath,CDesktopEntry("model_system_config",QObject::tr("系统建模"),"iscs6000 system model configuration",execPlatDir+"/model_system_config",iconDir + "/systemConfig.ico"),strErr);
    createDesktopEntry(appDestPath,CDesktopEntry("model_studio",QObject::tr("设备建模"),"iscs6000 model studio",execPlatDir+"/model_studio",iconDir + "/studio.ico"),strErr);
    createDesktopEntry(appDestPath,CDesktopEntry("hmi",QObject::tr("画面组态"),"iscs6000 human machine interface app",execPlatDir+"/hmi",iconDir + "/fes_sim.ico"),strErr);
    createDesktopEntry(appDestPath,CDesktopEntry("fbd_editor",QObject::tr("逻辑编程"),"iscs6000 fbd editor",execPlatDir+"/fbd_designer",iconDir + "/fbd_editor.ico"),strErr);
    createDesktopEntry(appDestPath,CDesktopEntry("db_manager",QObject::tr("工程管理"),"iscs6000 database management",execPlatDir+"/db_manager",iconDir + "/db_manager.ico"),strErr);
    createDesktopEntry(appDestPath,CDesktopEntry("sys_startup",QObject::tr("实时监控"),"iscs6000 system management",execProdDir+"/sys_startup",iconDir + "/sys_startup.ico"),strErr);
    createDesktopEntry(appDestPath,CDesktopEntry("hmi_explorer",QObject::tr("人机界面"),"open iscs66000 hmi",execPlatDir+"/hmi_explorer.sh"),strErr);

    return true;
}


bool setSysctl()
{
    system("echo 'net.ipv4.ping_group_range = 0 2147483647' > /etc/sysctl.d/555-ping.conf");
    system("sysctl -p /etc/sysctl.d/555-ping.conf");
    return true;
}


} //< iot_sys

#endif //< #ifdef OS_LINUX