#include "Widget.h"
#include "ui_Widget.h"
#include <QFileDialog>
#include <QDebug>
#include <QMessageBox>
#include <QDateTime>

/// \~chinese 用于限制显示帧率的时间戳		\~english Time stamp to limit the rate of display
QDateTime gLastDisplay;

Widget::Widget(QWidget *parent) :
    QWidget(parent),
    ui(new Ui::Widget)
{
    ui->setupUi(this);
    mCtrlThread = new DeviceControlThread(this);
    connect(mCtrlThread, &DeviceControlThread::signalControlFinish, this, &Widget::onControlFinish);
    connect(mCtrlThread, &DeviceControlThread::signalSelectGrabConfig, this, &Widget::onSelectGrabConfig, Qt::BlockingQueuedConnection);
    /// \~chinese 连接采图回调到主线程，需要等待显示完成后再释放缓冲区数据。主线程的耗时操作影响界面刷新时，会对采集速度造成影响
    connect(mCtrlThread, &DeviceControlThread::signalImageGrabbed, this, &Widget::onImageGrabbed, Qt::BlockingQueuedConnection);
}

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

/// \~chinese  扫描相机按钮的槽函数		                    \~english Slot function of probe push button
void Widget::on_pushButton_probe_clicked()
{
    mCtrlThread->StartProbe();
}

/// \~chinese  打开/关闭相机按钮的槽函数		                    \~english Slot function of open / close camera push button
void Widget::on_pushButton_openCamera_clicked()
{
    if (gCamera) {
        mCtrlThread->StartClose();
    } else {
        int index = ui->comboBox_cameraList->currentIndex();
        mCtrlThread->StartOpen(index);
    }
}

/// \~chinese  开始/停止采集按钮的槽函数		                \~english Slot function of start / stop acquisitio push button
void Widget::on_pushButton_startGrab_clicked()
{
    if (nullptr == gCamera) {
        QMessageBox::critical(this, "Critical", "Open camera first!");
        return;
    }

    if (gCamera->g_bGrabbing) {
        mCtrlThread->StartStopGrab();
    } else {
        mCtrlThread->StartGrab();
    }
}

void Widget::onControlFinish(ITK_DEVICE_CONTROL_TYPE nType, bool bSuccess)
{
    switch (nType) {
    case ITK_DEVICE_CONTROL_PROBE:
    {
        if (!bSuccess) {
            QMessageBox::critical(this, "Critical", "Probe failed!");
            return;
        }
        QStringList camList = mCtrlThread->GetDeviceList();
        ui->comboBox_cameraList->clear();
        ui->comboBox_cameraList->addItems(camList);
    }
        break;
    case ITK_DEVICE_CONTROL_OPEN:
        if (!bSuccess) {
            QMessageBox::critical(this, "Critical", "Failed to open camera!");
            return;
        }
        ui->pushButton_openCamera->setText("Close");
        ui->pushButton_probe->setEnabled(false);
        ui->comboBox_cameraList->setEnabled(false);
        break;
    case ITK_DEVICE_CONTROL_CLOSE:
        if (gCamera)
            ui->pushButton_startGrab->setText(gCamera->g_bGrabbing ? "Stop" : "Grab");
        if (!bSuccess) {
            QMessageBox::critical(this, "Critical", "Failed to close camera!");
            return;
        }
        ui->pushButton_openCamera->setText("Open");
        ui->pushButton_probe->setEnabled(true);
        ui->comboBox_cameraList->setEnabled(true);
        ui->pushButton_startGrab->setText("Grab");
        break;
    case ITK_DEVICE_CONTROL_GRAB:
        if (!bSuccess) {
            QMessageBox::critical(this, "Critical", "Failed to start grab!");
            return;
        }
        ui->pushButton_startGrab->setText("Stop");
        break;
    case ITK_DEVICE_CONTROL_STOP:
        if (!bSuccess) {
            QMessageBox::critical(this, "Critical", "Failed to stop grab!");
            return;
        }
        ui->pushButton_startGrab->setText("Grab");
        break;
    }
}

QString Widget::onSelectGrabConfig()
{
    QString fileName = QFileDialog::getOpenFileName(this, tr("Select Vlcf"), "", "*.vlcf");
    if (fileName.isEmpty()) {
        QMessageBox::information(this, "Info", tr("No config file selected, camera will grab with default paramter"));
    }
    return fileName;
}

void Widget::onImageGrabbed(const QImage &img)
{
    QDateTime now = QDateTime::currentDateTime();
    /// \~chinese  控制刷新帧率小于5		                \~english Limit the rate of diaply less than 5
    if (gLastDisplay.isValid() && gLastDisplay.msecsTo(now) < 200)
        return;
    gLastDisplay = now;

    ui->labe_img->setPixmap(QPixmap::fromImage(img).scaled(ui->labe_img->size()));
}