#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

DeviceService::DeviceService(QObject *parent) : QObject(parent)
{
    key.flag = None;
    key.lastState = KEY_Up;
    m_ledStatus = 0;
    m_keyStatus = 0;

#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

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

    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();
            }
        }
    });
}

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()
{
    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;
}