#include "mainwindow.h"
#include "ui_mainwindow.h"
#include <fcntl.h>
#include <sys/ioctl.h>
#include <linux/types.h>
#include <linux/spi/spidev.h>
#include <QMessageBox>
#include <unistd.h>
#include <QDir>
#include <QDebug>
#include <DWKeyboard/KeyboardGlobal.h>

MainWindow::MainWindow(QWidget *parent) :
    QMainWindow(parent),
    ui(new Ui::MainWindow)
{
    
    ui->setupUi(this);
	GlobalInit();
	ui->speed->installEventFilter(this);
	ui->delay->installEventFilter(this);
	ui->bits->installEventFilter(this);
	ui->editsend->installEventFilter(this);

	setWindowState(Qt::WindowMaximized);
	setWindowFlags(Qt::FramelessWindowHint | Qt::WindowTitleHint | Qt::WindowCloseButtonHint);
	
	ui->spidevlists->addItem(QWidget::tr("Please select SPI device"));

	QDir dir("/dev/");
	dir.setFilter(QDir::System | QDir::NoSymLinks );
	QFileInfoList list = dir.entryInfoList();
	for (int i = 0; i < list.size(); ++i) {
		QFileInfo fileInfo = list.at(i);
		if (fileInfo.fileName().contains("spidev",Qt::CaseSensitive)) {
			char buff[100];
			sprintf(buff, "/dev/%s", qPrintable(QString("%1").arg(fileInfo.fileName())));
			qDebug() << qPrintable(QString("%1").arg(fileInfo.fileName()));
			ui->spidevlists->addItem(QWidget::tr(buff));
		}
	}

	connect(ui->spidevlists,
            SIGNAL(currentIndexChanged(const QString &)),
            this, SLOT(GetSpiDevName(const QString &)));
	connect(ui->exitBtn, &QPushButton::clicked, this, [=](){
			close();
			});


}

bool MainWindow::eventFilter(QObject *watched, QEvent *event)
{
	static bool mFocusIn = false;
	if (event->type()==QEvent::FocusIn)
	{
		mFocusIn = true;
	}
	else if (event->type()==QEvent::FocusOut)
	{
		PlatformInputContextBase->FocusOut(watched);
		mFocusIn = false;
	}

	if (mFocusIn && event->type() == QEvent::MouseButtonPress) {
		QMouseEvent *e = (QMouseEvent *)event;
		PlatformInputContextBase->FocusIn(watched, e->globalPos());
	}

	return QMainWindow::eventFilter(watched,event);
}

void MainWindow::GetSpiDevName(const QString &name)
{
	int ret;
    char buf[32];
    uint8_t mode;
    uint8_t bits = 8;
    uint32_t speed = 500000;
	uint16_t delay;

    sprintf(DevName, "%s", name.toStdString().data());
	if (fd > 0)
		::close(fd);
    fd = ::open(DevName, O_RDWR);
    if(fd < 0)
    {
        QMessageBox::about(this,"error","open spidev failure");
		return ;
    }

    /*
     * spi mode
     */
    ret = ::ioctl(fd, SPI_IOC_WR_MODE, &mode);
    if (ret == -1)
	    fprintf(stderr, "can't set spi mode");

    ret = ::ioctl(fd, SPI_IOC_RD_MODE, &mode);
    if (ret == -1)
	    fprintf(stderr, "can't get spi mode");
	

    /*
     * bits per word
     */
    ret = ::ioctl(fd, SPI_IOC_WR_BITS_PER_WORD, &bits);
    if (ret == -1)
	    fprintf(stderr, "can't set bits per word");

    ret = ::ioctl(fd, SPI_IOC_RD_BITS_PER_WORD, &bits);
    if (ret == -1)
	    fprintf(stderr, "can't get bits per word");

    /*
     * max speed hz
     */
    ret = ::ioctl(fd, SPI_IOC_WR_MAX_SPEED_HZ, &speed);
    if (ret == -1)
	    fprintf(stderr, "can't set max speed hz");

    ret = ::ioctl(fd, SPI_IOC_RD_MAX_SPEED_HZ, &speed);
    if (ret == -1)
	    fprintf(stderr, "can't get max speed hz");

    fprintf(stderr,"spi mode: %d\n", mode);
    fprintf(stderr,"bits per word: %d\n", bits);
    fprintf(stderr,"max speed: %d Hz (%d KHz)\n", speed, speed/1000);

    update_params();
}

void MainWindow::update_params()
{
    unsigned char mode = 0,bits;
    unsigned int speed,ret;
    unsigned short delay;

    speed = ui->speed->text().toInt();
    delay = ui->delay->text().toInt();
    bits  = ui->bits->text().toInt();

    ::ioctl(fd, SPI_IOC_RD_MODE, &mode);

    if(ui->loop->isChecked())
        mode |= SPI_LOOP;

    if(ui->clockphase->isChecked())
        mode |= SPI_CPHA;

    if(ui->clockpolarity->isChecked())
        mode |= SPI_CPOL;

    if(ui->lsb->isChecked())
        mode |= SPI_LSB_FIRST;

    if(ui->cshigh->isChecked())
        mode |= SPI_CS_HIGH;

    if(ui->wire->isChecked())
        mode |= SPI_3WIRE;

    if(ui->nocs->isChecked())
        mode |= SPI_NO_CS;

    if(ui->ready->isChecked())
        mode |= SPI_READY;

    ret = ::ioctl(fd,SPI_IOC_WR_MODE,&mode);
    if(ret < 0)
    {
        QMessageBox::about(this,"error","SPI_IOC_WR_MODE failure");
        exit(0);
    }

    ret = ::ioctl(fd,SPI_IOC_WR_BITS_PER_WORD,&bits);
    if(ret < 0)
    {
        QMessageBox::about(this,"error","SPI_IOC_WR_BITS_PER_WORD failure");
        exit(0);
    }

    ret = ::ioctl(fd,SPI_IOC_WR_MAX_SPEED_HZ,&speed);
    if(ret < 0)
    {
        QMessageBox::about(this,"error","SPI_IOC_WR_MAX_SPEED_HZ failure");
        exit(0);
    }

}

MainWindow::~MainWindow()
{
    delete ui;
    ::close(fd);
}

void MainWindow::on_send_clicked()
{
    std::string str = ui->editsend->text().toStdString();
    struct spi_ioc_transfer tr;
    char buf[str.length()+1] = {0};
    memset(buf,0,str.length()+1);

    memset(&tr,0,sizeof(tr));
    tr.tx_buf = (__u64)str.c_str();
    tr.rx_buf = (__u64)buf;
    tr.len = str.length();
    tr.delay_usecs = ui->delay->text().toInt();
    tr.speed_hz = ui->speed->text().toInt();
    tr.bits_per_word = ui->bits->text().toInt();
    ::ioctl(fd,SPI_IOC_MESSAGE(1),&tr);

    ui->editrecv->append(QString(buf));

}

void MainWindow::on_loop_clicked(bool checked)
{
    update_params();
}

void MainWindow::on_clockphase_clicked(bool checked)
{
    update_params();
}

void MainWindow::on_clockpolarity_clicked(bool checked)
{
    update_params();
}

void MainWindow::on_lsb_clicked(bool checked)
{
    update_params();
}

void MainWindow::on_cshigh_clicked(bool checked)
{
    update_params();
}

void MainWindow::on_wire_clicked(bool checked)
{
    update_params();
}

void MainWindow::on_nocs_clicked(bool checked)
{
    update_params();
}

void MainWindow::on_ready_clicked(bool checked)
{
    update_params();
}

void MainWindow::on_speed_textChanged(const QString &arg1)
{
    update_params();
}

void MainWindow::on_delay_textChanged(const QString &arg1)
{
    update_params();
}

void MainWindow::on_bits_textChanged(const QString &arg1)
{
    update_params();
}

void MainWindow::moveEvent(QMoveEvent *)
{
    this->move(QPoint(0,0));
}

void MainWindow::resizeEvent(QResizeEvent *)
{
    this->showMaximized();
}

void MainWindow::closeEvent(QCloseEvent *)
{
    exit(0);
}