#include "mainwindow.h"
#include "ui_mainwindow.h"

MainWindow::MainWindow(QWidget *parent)
    : QMainWindow(parent)
    , ui(new Ui::MainWindow)
{
    m_serialPort = new QSerialPort();

    ui->setupUi(this);
    setWindowTitle("Serial Helper");
}

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

void MainWindow::receiveData() {
    QByteArray data = m_serialPort->readAll();
    qDebug() << "\nreceived data: " << data.length() << data.toHex();
}


void MainWindow::on_btn_serial_search_clicked()
{
    QStringList m_serialPortNameList;

    foreach(const QSerialPortInfo &info, QSerialPortInfo::availablePorts()) {
        m_serialPortNameList << info.portName();
        qDebug() << "Serial port discovered: " << info.portName();
    }

    ui->comboBox_serial->clear();
    ui->comboBox_serial->addItems(m_serialPortNameList);
    if (m_serialPortNameList.length() > 0) {
        ui->comboBox_serial->setCurrentIndex(0);
    }
}


void MainWindow::on_btn_serial_toggle_clicked()
{
    if (ui->comboBox_serial->currentText() == "") {
        QMessageBox::information(this, "", "请选择串口");
        return;
    }
    if (m_serialPort->isOpen()) {
        m_serialPort->clear();
        m_serialPort->close();
        qDebug() << "Serial port closed";
        ui->btn_serial_toggle->setText("打开串口");

        // enable serial port comboBoxes
        ui->comboBox_serial->setDisabled(false);
        ui->comboBox_baud->setDisabled(false);
        ui->btn_serial_search->setDisabled(false);
    } else {
        m_serialPort->setPortName("/dev/" + ui->comboBox_serial->currentText());
        if (!m_serialPort->open(QIODevice::ReadWrite)) {
            QMessageBox::information(this, "", "串口打开失败");
            qDebug() << "Serial open failed";
            return;
        }
        qDebug() << "Serial open successful";
        ui->btn_serial_toggle->setText("关闭串口");

        // handle baud rate
        QSerialPort::BaudRate t_BaudRate;
        switch(ui->comboBox_baud->currentIndex()) {
        case 0:
            t_BaudRate = QSerialPort::Baud2400;
            break;
        case 1:
            t_BaudRate = QSerialPort::Baud4800;
            break;
        case 2:
            t_BaudRate = QSerialPort::Baud9600;
            break;
        case 3:
            t_BaudRate = QSerialPort::Baud115200;
            break;
        default:
            t_BaudRate = QSerialPort::Baud9600;
            break;
        }

        // serial port configuration
        m_serialPort->setBaudRate(t_BaudRate);
        m_serialPort->setDataBits(QSerialPort::Data8);
        m_serialPort->setFlowControl(QSerialPort::NoFlowControl);
        m_serialPort->setParity(QSerialPort::NoParity);
        m_serialPort->setStopBits(QSerialPort::OneStop);
        connect(m_serialPort, SIGNAL(readyRead()), this, SLOT(receiveData()));

        // disable serial port comboBoxes
        ui->comboBox_serial->setDisabled(true);
        ui->comboBox_baud->setDisabled(true);
        ui->btn_serial_search->setDisabled(true);
    }
}