#include <TimerOne.h>
#include <ezButton.h> //anti rebote
#include <TM1637TinyDisplay.h>
#include <ArduinoTrace.h>
#include <EasyBuzzer.h> 

unsigned char hour = 7;
unsigned char minute = 9;
unsigned char Update;
unsigned char halfsecond = 0;
unsigned char second;
unsigned char alarmHour = 7;
unsigned char alarmMinute = 10;


#define CLK 2
#define DIO 3
#define ON 1
#define OFF 0


// Instantiate TM1637TinyDisplay Class
TM1637TinyDisplay display(CLK, DIO);

ezButton timeSetBtn(5);  // create ezButton object that attach to pin 5;
ezButton hourBtn(6);
ezButton minuteBtn(7);
ezButton alarmSetBtn(8);

void setup()
{
  Serial.begin(115200);
  timeSetBtn.setDebounceTime(50); // set debounce time to 50 milliseconds
  hourBtn.setDebounceTime(50);
  minuteBtn.setDebounceTime(50);
  alarmSetBtn.setDebounceTime(50);
  pinMode(5, INPUT_PULLUP);
  pinMode(6, INPUT_PULLUP);
  pinMode(7, INPUT_PULLUP);
  pinMode(8, INPUT_PULLUP);
  display.begin();
  Timer1.initialize(500000);//timing for 500ms
  Timer1.attachInterrupt(TimingISR);//declare the interrupt serve routine:TimingISR
}

unsigned long pm1;
void loop()
{
  timeSetBtn.loop();
  hourBtn.loop();
  minuteBtn.loop();
  alarmSetBtn.loop();
  incrementHour();
  incrementMinute();
  clockTicking();
  setAlarm();
  checkAlarm();

  /*
  if(hourBtn.getState()==LOW){
    Serial.println("Botoncito horas");
  }
  if(minuteBtn.getState()==LOW){
    Serial.println("Botoncito minutos");
  }
  */

  
  Serial.print(hour);
  Serial.print(":");
  Serial.print(minute);
  Serial.print(":");
  Serial.println(second);
  
  delay(10);
}


void incrementHour()
{
enum {s0,s1,s2,s3};
static int state=s0;
  if (alarmSetBtn.getState()==HIGH)
  {
    switch(state)
    {
      case s0:
        if(timeSetBtn.getState()==LOW) //si esta oprimido paso a s1
        {  
          state=s1;
        }
      break;  
      case s1:
        if(hourBtn.getState()==LOW && timeSetBtn.getState()==LOW)//ambos oprimidos
        { 
          hour++;
          pm1=millis();
          state=s2;
        }  
        else
        {
          state=s0;
        }  

      break;

      case s2:
        if(hourBtn.getState()==LOW && timeSetBtn.getState()==LOW)
        {   
          if((millis()-pm1)>800)
          {
            pm1=millis();
            state=s3;
            
          }
        }
        else
        {
          state=s0;
        }

      break;

      case s3:
        if(hourBtn.getState()==LOW && timeSetBtn.getState()==LOW)
        {   
          if((millis()-pm1)>250 && hour<24)//comenzamos a increentar 
          {
            pm1=millis();
            hour++;
            if (hour >= 24){
              hour = 0;
            }
          }
          long int hora =hour*100;
          display.showNumber(hora+minute);
        }
        else
        {
          state=s0;
        }
      break;

    }
  }
}

void incrementMinute()
{
enum {s0,s1,s2,s3};
static int state=s0;
  if (alarmSetBtn.getState()==HIGH)
  {
    switch(state)
    {
      case s0:
        if(timeSetBtn.getState()==LOW) //si esta oprimido paso a s1
        {  
          state=s1;
        }
      break;  
      case s1:
        if(minuteBtn.getState()==LOW && timeSetBtn.getState()==LOW)//ambos oprimidos
        {  
          minute++;
          pm1=millis();
          state=s2;
        }  
        else
        {
          state=s0;
        }  

      break;

      case s2:
        if(minuteBtn.getState()==LOW && timeSetBtn.getState()==LOW)
        {   
          if((millis()-pm1)>800)
          {
            pm1=millis();
            state=s3;
            
          }
        }
        else
        {
          state=s0;
        }

      break;
      case s3:
        if(minuteBtn.getState()==LOW && timeSetBtn.getState()==LOW)
        {   
          if((millis()-pm1)>250 && minute<60)//comenzamos a increentar 
          {
            pm1=millis();
            minute++;
            if (minute >= 60){ 
              hour++;    
              if (hour >=24){
                hour = 0;
              }
              minute = 0;
            }
          }
          display.showNumber((hour*100)+minute);
        }
        else
        {
          state=s0;
        }
      break;

    }
  }
}


void clockTicking()
{
  if(timeSetBtn.getState()==HIGH && alarmSetBtn.getState()==HIGH)
  {
    if(Update == ON)
    {
      display.showNumber((hour*100)+minute);
      Update = OFF;
    }
  }

}

void TimingISR()
{
  if(timeSetBtn.getState()==HIGH && alarmSetBtn.getState()==HIGH)
  {
    halfsecond ++;
    Update = ON;
    if(halfsecond == 2){
      second ++;
      if(second == 60)
      {
        minute ++;
        if(minute == 60)
        {
          hour ++;
          if(hour == 24)hour = 0;
          minute = 0;
        }
        second = 0;
      }
      halfsecond = 0;
    }
  }

}


void setAlarm()
{
enum {s0,s1,s2,s3,s4,s5};
static int state=s0;
  Serial.print("Alarm: ");
  Serial.println((alarmHour*100)+alarmMinute);

  switch(state)
  {
    case s0:
      if(alarmSetBtn.getState()==LOW) //si esta oprimido paso a s1
      {
        state=s1;
      }
    break;  
    case s1:
      if(hourBtn.getState()==LOW && alarmSetBtn.getState()==LOW)
      { 
        alarmHour++;
        pm1=millis();
        state=s2;
      }
      else if (minuteBtn.getState()==LOW && alarmSetBtn.getState()==LOW)
      {
        alarmMinute++;
        pm1=millis();
        state=s4;
      }
      else
      {
        state=s0;
        delay(1000);
      }  

    break;

    case s2:
      if(hourBtn.getState()==LOW && alarmSetBtn.getState()==LOW)
      {   
        if((millis()-pm1)>800)
        {
          pm1=millis();
          state=s3;
          
        }
      }
      else
      {
        state=s0;
        delay(1000);
      }

    break;

    case s3:
      if(hourBtn.getState()==LOW && alarmSetBtn.getState()==LOW)
      {   
        if((millis()-pm1)>250 && alarmHour<24)//comenzamos a increentar 
        {
          pm1=millis();
          alarmHour++;
          if (alarmHour >= 24){
            alarmHour = 0;
          }
        }
        display.showNumber((alarmHour*100)+alarmMinute);
      }
      else
      {
        state=s0;
        delay(1000);
      }
    break;

    case s4:
      if(minuteBtn.getState()==LOW && alarmSetBtn.getState()==LOW)
      {   
        if((millis()-pm1)>800)
        {
          pm1=millis();
          state=s5;
          
        }
      }
      else
      {
        state=s0;
        delay(1000);
      }
    break;

    case s5:
      if(minuteBtn.getState()==LOW && alarmSetBtn.getState()==LOW)
      {   
        if((millis()-pm1)>250 && alarmMinute<60)//comenzamos a increentar 
        {
          pm1=millis();
          alarmMinute++;
          if (alarmMinute >= 60){ 
            alarmHour++;    
            if (alarmHour >=24){
              alarmHour = 0;
            }
            alarmMinute = 0;
          }
        }
        display.showNumber((alarmHour*100)+alarmMinute);
      }
      else
      {
        state=s0;
        delay(1000);
      }
    break;

  }


}
void checkAlarm() {
  if (hour == alarmHour && minute == alarmMinute) {
    EasyBuzzer.setPin(9); 
    EasyBuzzer.singleBeep(2000,5000);
  }
  else{
    EasyBuzzer.stopBeep();
  }
}