#include "mainwindow.h"
#include "ui_mainwindow.h"
#include <QDateTime>
#include "HGImgFmt.h"

MainWindow::MainWindow(QWidget *parent)
    : QMainWindow(parent)
    , ui(new Ui::MainWindow)
    , m_device(nullptr)
{
    ui->setupUi(this);
    ui->label_devInfo->clear();
    ui->pushButton_scan->setEnabled(false);

    connect(this, SIGNAL(sane_dev_arrive(QString)), this, SLOT(on_sane_dev_arrive(QString)), Qt::QueuedConnection);
    connect(this, SIGNAL(sane_dev_remove(QString)), this, SLOT(on_sane_dev_remove(QString)), Qt::QueuedConnection);
    connect(this, SIGNAL(newImage(void*)), this, SLOT(on_newImage(void*)), Qt::DirectConnection);

    HGLib_InitDevice(DeviceHotPlugEventFunc, this);
}

MainWindow::~MainWindow()
{
    HGLib_DeinitDevice();
    delete ui;
}

void MainWindow::DeviceHotPlugEventFunc(HGUInt event, const HGChar *deviceName, HGPointer param)
{
    MainWindow* p = (MainWindow*)param;

    if (HGLIB_DEVHOTPLUG_EVENT_ARRIVE == event)
    {
        emit p->sane_dev_arrive(deviceName);
    }
    else if (HGLIB_DEVHOTPLUG_EVENT_REMOVE == event)
    {
        emit p->sane_dev_remove(deviceName);
    }
}

void MainWindow::DeviceScanEventFunc(HGLibDevice device, HGUInt event, HGInt operateCode, const HGChar *info, HGPointer param)
{
    MainWindow *p = (MainWindow*)param;
    p->addContent(info);
}

void MainWindow::DeviceScanImageFunc(HGLibDevice device, HGLibImage image, HGPointer param)
{
    MainWindow *p = (MainWindow*)param;
    emit p->newImage(image);
    int id = HGLib_GetDevicePageId(device);
    char info[64];
    sprintf(info, "Page id: %d", id);
    p->addContent(info);
}

void MainWindow::on_sane_dev_arrive(QString devName)
{
    int idx = -1;
    int count = ui->comboDevList->count();
    for (int i = 0; i < count; ++i)
    {
        QString name = ui->comboDevList->itemText(i);
        if (name == devName)
        {
            idx = i;
            break;
        }
    }

    if (-1 == idx)
    {
        ui->comboDevList->addItem(devName);
    }
}
void MainWindow::on_sane_dev_remove(QString devName)
{
    int idx = -1;
    int count = ui->comboDevList->count();
    for (int i = 0; i < count; ++i)
    {
        QString name = ui->comboDevList->itemText(i);
        if (name == devName)
        {
            idx = i;
            break;
        }
    }

    if (-1 != idx)
    {
        QString info = tr("The device %1 is disconnected.").arg(devName);
        ui->label_devInfo->setText(info);
        addContent(info);
        ui->comboDevList->removeItem(idx);
    }
}

void MainWindow::on_newImage(void *image)
{

}

void MainWindow::on_comboDevList_currentIndexChanged(int index)
{
    if (-1 != index)
    {
        if (m_device != nullptr)
        {
            HGLib_CloseDevice(m_device);
            ui->label_devInfo->clear();
            ui->pushButton_scan->setEnabled(false);
        }

        QString name = ui->comboDevList->itemText(index);
        m_device = HGLib_OpenDevice(name.toStdString().c_str());
        if (m_device != nullptr)
        {
            QString info = tr("The device %1 is open.").arg(name);
            ui->label_devInfo->setText(info);
            addContent(info);
            ui->pushButton_scan->setEnabled(true);
        }
        else
        {
            QString info = tr("The device %1 open failed.").arg(name);
            addContent(info);
        }
    }
}

void MainWindow::on_pushButton_scan_clicked()
{
    HGLib_StartDeviceScan(m_device, DeviceScanEventFunc, this, DeviceScanImageFunc, this);
}

void MainWindow::addContent(QString content)
{
    ui->textBrowser->insertPlainText(QDateTime::currentDateTime().toString("[yyyy-MM-dd hh:mm] ") + content + "\n");
    ui->textBrowser->moveCursor(QTextCursor::End);
    ui->textBrowser->setTextColor(Qt::black);
}