#include "deviceservice.h"
#include <QtCore>
#ifdef Q_OS_LINUX
#include <wiringPi.h>
#else
#endif

#define WIRING_PIN_LED 4    //GPIO.4
#define WIRING_PIN_KEY 3    //GPIO.3
#define Click_Overtime 50
#define Press_Overtime 1500
#define DblClick_Difftime 500

DeviceService::DeviceService(QObject *parent) : QObject(parent)
{
    key.flag = None;
    key.state = KEY_Up;
    m_ledStatus = 0;
    m_keyStatus = 0;
    lastStateTime = QTime::currentTime();

#ifdef Q_OS_LINUX
    wiringPiSetup();
    pinMode(WIRING_PIN_LED,OUTPUT);//LED输出模式 可选值：INPUT、OUTPUT、PWM_OUTPUT，GPIO_CLOCK
    pinMode(WIRING_PIN_KEY,INPUT); //KEY输入模式
    pullUpDnControl(WIRING_PIN_KEY,PUD_UP); //KEY设置上拉
#else
    qDebug() << "wiringPiSetup()";
    qDebug() << "pinMode(WIRING_PIN_LED,OUTPUT)";
    qDebug() << "pinMode(WIRING_PIN_BTN,INPUT)";
#endif

    //按键灯闪烁
    timer1.setInterval(1000);
//    timer1.start();
//    connect(&timer1,&QTimer::timeout,[=](){
//        m_ledStatus ^= 1;
//        ledSet(m_ledStatus);
//    });


    //扫描按键状态，发送
    timer2.setInterval(50);
    timer2.start();
    connect(&timer2,&QTimer::timeout,[=](){
//        quint8 keyStatus = keyReadOnce();
//        if(keyStatus != m_keyStatus){
//            m_keyStatus = keyStatus;
//            qDebug() << "m_keyStatus " << m_keyStatus;
//        }
    //        key.flag = (KeyFlag)keyDetection();
    //        if(key.flag != None){
    //            if(key.flag == Click){
    //                emit keyClicked();
    //            }
    //        }
    keyDetection();
    });
}

void DeviceService::ledSet(int status)
{
#ifdef Q_OS_LINUX
    digitalWrite(WIRING_PIN_LED,status == 1 ? LOW : HIGH);//'HIGH'代表高电平，’LOW‘则为低电平
#else
    qDebug() << "LED set: " << status;
#endif
}

/**
 * @brief DeviceService::keyReadOnce
 * 按键按下返回0,按键弹起返回1
 * @return
 */
quint8 DeviceService::keyReadOnce()
{
#ifdef Q_OS_LINUX
    return digitalRead(WIRING_PIN_KEY);
#else
    //qDebug() << "keyReadOnce()";
    return KEY_Up;
#endif
}

quint8 DeviceService::keyDetection()
{
#if 0
    key.flag = None;  //清空按键标志
    quint8 status = keyReadOnce();
    if ((status == KEY_Down) && (key.lastState == KEY_Up))
    {
        uint16_t i = Click_Overtime;
        while(i--);
        status = keyReadOnce();
        if(status == KEY_Down){
            key.flag = Click;    //先确定按键标志为单击
        }
    }
    key.lastState = status;
    return key.flag;

#else
    //判定上次有行为，且上次行为产生时间间隔大于组合行为最长时间间隔，说明行为结束（不在判定组合行为），发送行为信号，并清空key.flag
    if(key.flag != None && lastFlagTime.msecsTo(QTime::currentTime()) >= DblClick_Difftime)
    {
        emit keyWorked(key.flag);
        qDebug() << "keyWorked = " << key.flag;
        key.flag = None;
    }

    KeyFlag flag = None;  //清空按键标志（行为）

    //获取当前按键状态
//    quint8 status = getbtnstatus();//获取当前按键状态********注意替换为防抖后的按键函数getbtnstatus（）
     quint8 status = keyReadOnce();

    //判定标志行为
    if(status == KEY_Up)
    {
        if(key.state == KEY_Down)
        {
            int difftime = lastStateTime.msecsTo(QTime::currentTime());
            if(difftime >= Press_Overtime)
            {
                flag = Press;
            }else if(difftime >= Click_Overtime)
            {
                flag = Click;
            }
        }
    }

    //判定组合行为
    if(flag == Click)
    {
        if(key.flag == Click)
        {
            flag = Dbl_Click;
        }else if(key.flag == Dbl_Click)
        {
            flag = Tri_Click;
        }
    }

    //记录上一行为及时间
    if(flag != None && flag != key.flag)
    {
        key.flag = flag;
        lastFlagTime = QTime::currentTime();
    }

    //记录按键按下时间
    if(status != key.state)
    {
        key.state = status;
        lastStateTime = QTime::currentTime();
        if(key.state != KEY_Up)
        {
            emit keyDown();//发送至mainwidget，用于记录按下时操作的患者是哪个
            qDebug() << "key.state = " << key.state;
        }
      }

    return key.flag;
#endif
}

quint8 DeviceService::getbtnstatus()
{
    quint8 keyRead = keyReadOnce();
    if(keyRead == KEY_Down)
    {
        uint16_t i = Click_Overtime;
        while(i--);
        if(keyRead == keyReadOnce())
        {
            return keyRead;
        }
    }
}