/*
:Project:Clock_Set_Date_Time
:Author: Tiziano Bianchettin
:Date: 13/01/2017
:Revision: 1
:License: Public Domain
thanks to:
  http://arduinoenonsolo.blogspot.it/2012/12/orologio-con-arduino-e-il-ds1307.html
  http://www.mauroalfieri.it/
  http://www.danielealberti.it/
  http://www.maffucci.it/
  My electronics laboratory professor "Perito Carli"  
*/

//************libraries**************//
#include <Wire.h>
#include <Adafruit_GFX.h>
#include <Adafruit_SSD1306.h>
#include "RTClib.h"

#include <TimeLib.h>
#include <DHT.h>
#include <Adafruit_Sensor.h>


#define SCREEN_WIDTH 128
#define SCREEN_HEIGHT 64

#define DHTPIN 5                            
#define OLED_RESET -1         

Adafruit_SSD1306 display(SCREEN_WIDTH, SCREEN_HEIGHT, &Wire, -1); 

RTC_DS1307 RTC;

#define DHTTYPE    DHT22      // DHT 22 (AM2302)
DHT dht(DHTPIN, DHTTYPE);

int P1=6; // Button SET MENU'
int P2=7; // Button +
int P3=8; // Button -
int P4=9; // SWITCH Alarm

#define LED 13
//#define buzzer 10

int hourupg;
int minupg;
int yearupg;
int monthupg;
int dayupg;
int menu =0;
int setAll =0;

uint8_t alarmHours = 0, alarmMinutes = 0;  // Holds the current alarm time

void setup() {

  Serial.begin(9600);
  Wire.begin();
  RTC.begin();
  RTC.adjust(DateTime(__DATE__, __TIME__));
  dht.begin();

  display.begin(SSD1306_SWITCHCAPVCC, 0x3C);
  display.setTextColor(WHITE);

  pinMode(P1,INPUT_PULLUP); // https://www.arduino.cc/en/Tutorial/InputPullupSerial
  pinMode(P2,INPUT_PULLUP);
  pinMode(P3,INPUT_PULLUP);
  pinMode(P4,INPUT_PULLUP);
  pinMode(LED,OUTPUT);
  
  int menu=0;
}

void loop() {

  if(digitalRead(P1)== LOW) 
  {
   menu=menu+1;
  }

  if((digitalRead(P2)== LOW)&&(digitalRead(P3)== LOW))                                                                                                                                                                     
  {
    
    DisplaySetHourAll();
    DisplaySetMinuteAll();
    display.clearDisplay();
    display.setCursor(0,0);
    display.print("ALARM");
    display.print(":");
    display.print(" ");
    display.print(alarmHours, DEC);
    display.print(":");
    display.print(alarmMinutes, DEC);
    display.display();
    delay(1000);
  }

  
// in which subroutine should we go?
  if (menu==0)
    {
     DisplayDateTime();
    }
          
  if (menu==1)
    {  
    DisplaySetHour();  
    }
  if (menu==2)
    {
    DisplaySetMinute();
    }
  if (menu==3)
    {
    DisplaySetYear();
    }
  if (menu==4)
    {
    DisplaySetMonth();
    }
  if (menu==5)
    {
    DisplaySetDay();
    }
  if (menu==6)
    {
    StoreAgg(); 
    delay(500);
    menu=0;
    }
  delay(100);
}

void DisplayDateTime ()
{
// We show the current date and time

  display.clearDisplay();
  DateTime now = RTC.now();
  display.setCursor(0,39);
  display.print("HOUR : ");
  if (now.hour()<=9)
  {
    display.print("0");
  }
  display.print(now.hour(), DEC);
  hourupg=now.hour();
  display.print(":");
  if (now.minute()<=9)
  {
    display.print("0");
  }
  display.print(now.minute(), DEC);
  minupg=now.minute();
  display.print(":");
  if (now.second()<=9)
  {
    display.print("0");
  }
  display.print(now.second(), DEC);
  
  display.setCursor(0,47);
  display.print("PVM: ");
  if (now.day()<=9)
  {
    display.print("0");
  }
  display.print(now.day(), DEC);
  dayupg=now.day();
  display.print(".");
  if (now.month()<=9)
  {
    display.print("0");
  }
  display.print(now.month(), DEC);
  monthupg=now.month();
  display.print(".");
  display.print(now.year(), DEC);
  yearupg=now.year();
  
  char DOW[][10]={"Sunday","Monday","Tuesday","Wednesday","Thursday","Friday","Saturday"};
  display.setCursor(0,55); 
  display.print("DAY: ");
  display.print(DOW[now.dayOfTheWeek()]);


//Alarm control

  if(digitalRead(P4)== LOW)
  {
   setAll=setAll+1;
  }
  if (setAll==0)
    {
     printAllOff();
     //noTone (buzzer);
     digitalWrite(LED,LOW);
     }
  if (setAll==1)

    if (setAll==1)
    {

     printAllOn();    
  
     DateTime now = RTC.now();
     if ( now.hour() == alarmHours && now.minute() == alarmMinutes )
        {
         DateTime now = RTC.now();
         digitalWrite(LED,HIGH);
         //tone(buzzer,880); //play the note "A5" (LA5)
         //delay (300);
         //tone(buzzer,698); //play the note "F6" (FA5)
        }
    else{
         //noTone (buzzer);
         digitalWrite(LED,LOW);
        }
    
    } 
  if (setAll==2)
    {
     setAll=0;
    }
  display.display(); 
}



void DisplaySetHour()
{
// time setting
  display.clearDisplay();
  DateTime now = RTC.now();
  if(digitalRead(P2)==LOW)
  {
    if(hourupg==23)
    {
      hourupg=0;
    }
    else
    {
      hourupg=hourupg+1;
    }
  }
   if(digitalRead(P3)==LOW)
  {
    if(hourupg==0)
    {
      hourupg=23;
    }
    else
    {
      hourupg=hourupg-1;
    }
  }
  display.setCursor(0,30);
  display.print("Set time:");
  display.print(hourupg,DEC);
  display.display();
  delay(200);
}

void DisplaySetMinute()
{
// Setting the minutes
  display.clearDisplay();
  if(digitalRead(P2)==LOW)
  {
    if (minupg==59)
    {
      minupg=0;
    }
    else
    {
      minupg=minupg+1;
    }
  }
   if(digitalRead(P3)==LOW)
  {
    if (minupg==0)
    {
      minupg=59;
    }
    else
    {
      minupg=minupg-1;
    }
  }
  display.setCursor(0,30);
  display.print("Set Minutes:");
  display.print(minupg,DEC);
  display.display();
  delay(200);
}

void DisplaySetYear()
{
// setting the year
  display.clearDisplay();
  if(digitalRead(P2)==LOW)
  {    
    yearupg=yearupg+1;
  }
   if(digitalRead(P3)==LOW)
  {
    yearupg=yearupg-1;
  }
  display.setCursor(0,30);
  display.print("Set Year:");
  display.print(yearupg,DEC);
  display.display();
  delay(200);
}

void DisplaySetMonth()
{
// Setting the month
  display.clearDisplay();
  if(digitalRead(P2)==LOW)
  {
    if (monthupg==12)
    {
      monthupg=1;
    }
    else
    {
      monthupg=monthupg+1;
    }
  }
   if(digitalRead(P3)==LOW)
  {
    if (monthupg==1)
    {
      monthupg=12;
    }
    else
    {
      monthupg=monthupg-1;
    }
  }
  display.setCursor(0,30);
  display.print("Set Month:");
  display.print(monthupg,DEC);
  display.display();
  delay(200);
}

void DisplaySetDay()
{
// Setting the day
  display.clearDisplay();
  if(digitalRead(P2)==LOW)
  {
    if (dayupg==31)
    {
      dayupg=1;
    }
    else
    {
      dayupg=dayupg+1;
    }
  }
   if(digitalRead(P3)==LOW)
  {
    if (dayupg==1)
    {
      dayupg=31;
    }
    else
    {
      dayupg=dayupg-1;
    }
  }
  display.setCursor(0,30);
  display.print("Set Day:");
  display.print(dayupg,DEC);
  display.display();
  delay(200);
}

void StoreAgg()
{
// Variable saving
  display.clearDisplay();
  display.setCursor(0,30);
  display.print("SAVING IN");
  display.setCursor(0,40);
  display.print("PROGRESS");
  RTC.adjust(DateTime(yearupg,monthupg,dayupg,hourupg,minupg,0));
  display.display();
  delay(500);
}
void DisplaySetHourAll()// Setting the alarm minutes
{
  while(digitalRead(P1)==HIGH){

  display.clearDisplay();

  if(digitalRead(P2)==LOW)
  {
    if(alarmHours==23)
    {
      alarmHours=0;
    }
    else
    {
      alarmHours=alarmHours+1;
    }
  }
   if(digitalRead(P3)==LOW)
  {
    if(alarmHours==0)
    {
      alarmHours=23;
    }
    else
    {
      alarmHours=alarmHours-1;
    }
  }
  display.setCursor(0,0);
  display.print("Set HOUR Alarm:");
  display.print(alarmHours,DEC);
  display.display();
  delay(200);
 }
 delay(200);
}

void DisplaySetMinuteAll()// Setting the alarm minutes
 {
  while(digitalRead(P1)==HIGH){ 

  display.clearDisplay();
  if(digitalRead(P2)==LOW)
  {
    if (alarmMinutes==59)
    {
      alarmMinutes=0;
    }
    else
    {
      alarmMinutes=alarmMinutes+1;
    }
  }
   if(digitalRead(P3)==LOW)
  {
    if (alarmMinutes==0)
    {
      alarmMinutes=59;
    }
    else
    {
      alarmMinutes=alarmMinutes-1;
    }
  }
  display.setCursor(0,0);
  display.print("Set MIN. Alarm:");
  display.print(alarmMinutes,DEC);
  display.display();
  delay(200);
 }
 delay(200);
}

void printAllOn(){
  display.setCursor(0,0);
  display.print("Alarm: ");
  if (alarmHours <= 9)
  {
  display.print("0");
  }
  display.print(alarmHours, DEC);
  display.print(":");
  if (alarmMinutes <= 9)
  {
  display.print("0");
  }
  display.print(alarmMinutes, DEC); 
  display.display();
  

}
void printAllOff() {
  display.setCursor(0,0);
  display.print("Alarm: Off  ");
  display.display();  
}