#include "datetimewidget.h"
#include "ui_datetimewidget.h"
#include <QTimer>
#include <QDebug>
#include "terminal.h"
#include <QTimeZone>
#include "terminal.h"
#include <QDateTime>
#include "messagebox.h"
#include "systemmanager.h"
#include <QLocale>
#include <QTimeZone>

Q_LOGGING_CATEGORY(flapp,  "app.rtc")
DateTimeWidget::DateTimeWidget( QWidget *parent) :
    IWidget(parent),
    ui(new Ui::DateTimeWidget),
    m_checker(Q_NULLPTR)
{
    ui->setupUi(this);
}

DateTimeWidget::~DateTimeWidget()
{
    delete ui;
}

QString DateTimeWidget::id()
{
    return "rtc";
}

void DateTimeWidget::initUi()
{  
   ui->zoneLbl->setText(QTimeZone::systemTimeZoneId());

    auto addDateTime= [=]( QComboBox *pComBox, int start, int end, const QString &unit=""){
        for(int n=start; n<=end; n++){
            QString s = QString::number(n);
            if(n<10)
            {
                s ="0" +s;
            }
            pComBox->addItem(tr((s +" " + unit).toLocal8Bit().data()) , n);
        }
    };

    auto changDay= [=]( ){
        ui->dayComBox->clear();
        QDate d(currentvalue(ui->yearCombox),
                currentvalue(ui->monthComBox),
                1);
        int maxDays = d.daysInMonth();
        addDateTime(ui->dayComBox, 1, maxDays, "Day");
    };

    addDateTime(ui->yearCombox, 2020, 2050, "Year");
    addDateTime(ui->monthComBox, 1, 12, "Month");

    connect(ui->yearCombox, &QComboBox::currentTextChanged, this, [=](){
        changDay();
    });
    connect(ui->monthComBox, &QComboBox::currentTextChanged, this, [=](){
        changDay();
    });

    addDateTime(ui->hourComBox, 0, 24, "Houre");
    addDateTime(ui->minutuComBo, 0, 59,"Minute");

    ui->yearCombox->setCurrentIndex(2);

    auto setEnable= [=](bool checked ){
        ui->yearCombox->setEnabled(checked);
        ui->monthComBox->setEnabled(checked);
        ui->dayComBox->setEnabled(checked);
        ui->hourComBox->setEnabled(checked);
        ui->minutuComBo->setEnabled(checked);
    };

    connect(ui->manualRaidoBtn, &QRadioButton::clicked, this, [=](bool checked){
        setEnable(checked);
    });
    connect(ui->ntpRadioBtn, &QRadioButton::clicked, this, [=](bool checked){
        setEnable(!checked);
    });

    ui->manualRaidoBtn->click();

    QTimer *timer = new QTimer(this);
    connect(timer, &QTimer::timeout, this, [=](){
        ui->systimeDataeLbl->setText(QDateTime::currentDateTime().toString("yyyy-MM-dd hh:mm:ss"));
        QString result = Terminal::execCmd("hwclock -r");
        if(SystemManager::instance()->getMatch(result, "[0-9]+").isEmpty())
        {
            ui->rtctimeLbl->setText("ERROR");
        }else{
            ui->rtctimeLbl->setText(result);
        }
    });
    timer->start(1000);

    m_checker = new NetworkChecker(this);

}

int DateTimeWidget::currentvalue(QComboBox *d)
{
    return d->itemData(d->currentIndex()).toInt();
}

void DateTimeWidget::on_applyBtn_clicked()
{
    QDateTime datetime;
    if(ui->manualRaidoBtn->isChecked())
    {
        QDate d(currentvalue(ui->yearCombox),
                currentvalue(ui->monthComBox),
                currentvalue(ui->dayComBox));
        QTime t(currentvalue(ui->hourComBox),
                currentvalue(ui->minutuComBo));
        datetime.setDate(d);
        datetime.setTime(t);
    }else{

        if(!m_checker->networkIsOk())
        {
            MessageBox::showMessage(this, "Unable to access the network by DNS name,");
            return;
        }
        long long mSeconds =NTPGetTimeBeijingMSeconds() ;
        datetime = QDateTime::fromMSecsSinceEpoch(mSeconds);
        ui->applyBtn->setEnabled(false);
        QTimer::singleShot(2000, this, [=](){
            ui->applyBtn->setEnabled(true);
        });
    }

    QString cmd =  QString("date -s %1  %2").
            arg("\"" + datetime.toString("yyyy-MM-dd hh:mm:ss") + "\"").
            arg("\"+%Y-%m-%d %H:%M:%S\"");

    qCDebug(flapp)<< cmd;
    system(cmd.toLocal8Bit().constData());
    system("hwclock -w");
}


#include <sys/types.h>
#include <sys/socket.h>
#include <netdb.h>
#include <unistd.h>
#include <QDateTime>
#include <QDebug>
//NTP 标度与 Unix 标度只相差一个常数 2208988800，这是 1900/1/1 （NTP 标度起点）与 1970/1/1 （Unix 标度起点）之间的秒数差别
long long DateTimeWidget::NTPGetTimeBeijingMSeconds()
{

#define NTP_TIMESTAMP_DELTA 2208988800
    int sockfd, n; // Socket file descriptor and the n return result from writing/reading from the socket.
    int portno = 123; // NTP UDP port number.
    const char* host_name = "ntp.aliyun.com"; // NTP server host-name.

    typedef struct
    {
        uint8_t li_vn_mode;      // Eight bits. li, vn, and mode.
        // li.   Two bits.   Leap indicator.
        // vn.   Three bits. Version number of the protocol.
        // mode. Three bits. Client will pick mode 3 for client.

        uint8_t stratum;         // Eight bits. Stratum level of the local clock.
        uint8_t poll;            // Eight bits. Maximum interval between successive messages.
        uint8_t precision;       // Eight bits. Precision of the local clock.

        uint32_t rootDelay;      // 32 bits. Total round trip delay time.
        uint32_t rootDispersion; // 32 bits. Max error aloud from primary clock source.
        uint32_t refId;          // 32 bits. Reference clock identifier.

        uint32_t refTm_s;        // 32 bits. Reference time-stamp seconds.
        uint32_t refTm_f;        // 32 bits. Reference time-stamp fraction of a second.

        uint32_t origTm_s;       // 32 bits. Originate time-stamp seconds.
        uint32_t origTm_f;       // 32 bits. Originate time-stamp fraction of a second.

        uint32_t rxTm_s;         // 32 bits. Received time-stamp seconds.
        uint32_t rxTm_f;         // 32 bits. Received time-stamp fraction of a second.

        uint32_t txTm_s;         // 32 bits and the most important field the client cares about. Transmit time-stamp seconds.
        uint32_t txTm_f;         // 32 bits. Transmit time-stamp fraction of a second.

    } ntp_packet;              // Total: 384 bits or 48 bytes.

    // Create and zero out the packet. All 48 bytes worth.

    ntp_packet packet = { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 };

    memset( &packet, 0, sizeof( ntp_packet ) );

    // Set the first byte’s bits to 00,011,011 for li = 0, vn = 3, and mode = 3. The rest will be left set to zero.

    *( ( char * ) &packet + 0 ) = 0x1b; // Represents 27 in base 10 or 00011011 in base 2.

    struct sockaddr_in serv_addr; // Server address data structure.
    struct hostent *server;      // Server data structure.

    sockfd = socket( AF_INET, SOCK_DGRAM, IPPROTO_UDP ); // Create a UDP socket.

    if ( sockfd < 0 )
        printf("ERROR opening socket\n");

    server = gethostbyname( host_name ); // Convert URL to IP.

    if ( server == NULL )
        printf("ERROR, no such host\n");

    // Zero out the server address structure.

    bzero( ( char* ) &serv_addr, sizeof( serv_addr ) );

    serv_addr.sin_family = AF_INET;

    // Copy the server’s IP address to the server address structure.

    bcopy( ( char* )server->h_addr, ( char* ) &serv_addr.sin_addr.s_addr, server->h_length );

    serv_addr.sin_port = htons( portno );

    // Call up the server using its IP address and port number.

    if ( ::connect( sockfd, ( struct sockaddr * ) &serv_addr, sizeof( serv_addr) ) < 0 )
        printf("ERROR connecting\n");

    n = write( sockfd, ( char* ) &packet, sizeof( ntp_packet ) );

    if ( n < 0 )
        printf("ERROR writing to socket\n");

    // Wait and receive the packet back from the server. If n == -1, it failed.

    n = read( sockfd, ( char* ) &packet, sizeof( ntp_packet ) );

    if ( n < 0 )
        printf( "ERROR reading from socket\n");

    packet.txTm_s = ntohl( packet.txTm_s ); // Time-stamp seconds.
    packet.txTm_f = ntohl( packet.txTm_f ); // Time-stamp fraction of a second.
   long long mSecond =(packet.txTm_s- NTP_TIMESTAMP_DELTA)*1000+ packet.txTm_f*232/1000/1000/1000;

   qDebug()<<QDateTime::fromMSecsSinceEpoch(mSecond);

   return mSecond;
}

NetworkChecker::NetworkChecker(QObject *parent):QObject(parent)
{
    this->start("ping www.forlinx.com");
}

void NetworkChecker::processMessage(const QString &info)
{
   m_info +=info;
}

bool NetworkChecker::networkIsOk()
{
    bool bOk =m_info.contains("ttl=");
    m_info.clear();
  return bOk;
}