#include "RTClib.h"

#include <Keypad.h>
#include "SevSeg.h"

RTC_DS1307 rtc;

char daysOfTheWeek[7][12] = {"Sunday", "Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday"};


////////////////Task States ///////////////////////////

#define LED 0
#define PushButton  1
#define Buzzer 2
#define RTC  3
#define End 4
#define keypad1 5
#define SevSeg 6
#define hc595 7


const uint8_t ROWS = 12;
const uint8_t COLS = 11;





///////////////////////////////////////////////////////



/////////////////////////////////////General Variables////////////////
char Task = 0; 
unsigned long currentMillis = millis();  /// tick timer 
////////////////////////////////////////////////////////////

///////////////////LED Task Global veriables////////

// Variables will change:
int ledState = LOW;  // ledState used to set the LED
////////////////////////////////////////////////////


///////////////Task timer veriables/////////////////
unsigned long LED_previousMillis = 0;  // will store last time LED was updated
const long LED_Timer = 500;  // interval at which to blink (milliseconds)

unsigned long RTC_previousMillis = 0;  // will store last time LED was updated
const long RTC_Timer = 3000;  // interval at which to blink (milliseconds)
////////////////////////////////////////////////////////////

////////////Task counter ////////////////////////
unsigned  long  LED_counter =0;
///////////////////////////////////////


char keys[ROWS][COLS] = {
  { '1', '2', '3', 'A' },
  { '4', '5', '6', 'B' },
  { '7', '8', '9', 'C' },
  { '*', '0', '#', 'D' }
};

uint8_t colPins[COLS] = { 5, 4, 3, 2 }; // Pins connected to C1, C2, C3, C4
uint8_t rowPins[ROWS] = { 9, 8, 7, 6 }; // Pins connected to R1, R2, R3, R4

Keypad keypad = Keypad(makeKeymap(keys), rowPins, colPins, ROWS, COLS);



///////////////Function Prototypes/////////////////////
void Red_LED_Task ();
void Push_Button_Task ();
void Buzzer_Task ();
void RTC_Task ();
void keypad_Task ();
void SevSeg_Task ();
////////////////////////////////////////////////////////////
	//Set to 1 for single digit display
	byte numDigits = 1;

	//defines common pins while using multi-digit display. Left empty as we have a single digit display
	byte digitPins[] = {};

	//Defines arduino pin connections in order: A, B, C, D, E, F, G, DP
	byte segmentPins[] = {3, 2, 8, 7, 6, 4, 5, 9};
	bool resistorsOnSegments = true;

void setup() {
///////////////////////////RTC
Serial.begin(115200);

  if (! rtc.begin()) {
    Serial.println("Couldn't find RTC");
    Serial.flush();
    abort();
  }

///////////////////////////////////////////////////////
  pinMode(7, INPUT);
  pinMode(8, OUTPUT);
  pinMode(6, OUTPUT);
  pinMode(9, OUTPUT);


  Serial.begin(9600);




	//Initialize sevseg object. Uncomment second line if you use common cathode 7 segment
	SevSeg.begin(COMMON_ANODE, numDigits, digitPins, segmentPins, resistorsOnSegments);

  	SevSeg.begin()
	//sevseg.begin(COMMON_CATHODE, numDigits, digitPins, segmentPins, resistorsOnSegments);

	SevSeg.setBrightness(90);

}


void loop() {
  
  currentMillis = millis();


  switch(Task){
    case LED :
    
     Red_LED_Task();

     Task = PushButton ;
    break;

    case PushButton:
     Push_Button_Task ();
  
    Task = Buzzer ;
    break;

    case Buzzer:
    Buzzer_Task ();
    
    Task = RTC;
    break;

  case RTC:
    RTC_Task ();
    
    Task = End;
    break;

     case keypad1:
     keypad_Task ();
    
    case SevSeg:
    SevSeg_Task();
    
    case hc595:
    hc595_Task();
    
    
    default:
  
    Task = LED;
    break;

case keypad:
keypad_Task ();


  }

   //Display numbers one by one with 2 seconds delay
   for(int i = 0; i < 10; i++)
   {
     SevSeg.setNumber(i);
     SevSeg.refreshDisplay(); 
     delay(2000);
   }

  
}


void Red_LED_Task(){

if (currentMillis - LED_previousMillis >= LED_Timer) {
    // save the last time you blinked the LED
    LED_previousMillis = currentMillis; 
  if (ledState == LOW) {
      ledState = HIGH;
    } else {
      ledState = LOW;
    }
    // set the LED with the ledState of the variable:
    digitalWrite(8, ledState);
    }
  
}

void Push_Button_Task (){

if(digitalRead(7)){
   digitalWrite(9, HIGH);

}
else{
 digitalWrite(9, LOW);

}

}




void Buzzer_Task (){


tone(6, 262, 10); // Plays 262Hz tone for 0.250 seconds


}

void RTC_Task (){

if (currentMillis - RTC_previousMillis >= RTC_Timer) {
    // save the last time you blinked the LED
    RTC_previousMillis = currentMillis; 

DateTime now = rtc.now();

  Serial.print("Current time: ");
  Serial.print(now.year(), DEC);
  Serial.print('/');
  Serial.print(now.month(), DEC);
  Serial.print('/');
  Serial.print(now.day(), DEC);
  Serial.print(" (");
  Serial.print(daysOfTheWeek[now.dayOfTheWeek()]);
  Serial.print(") ");
  Serial.print(now.hour(), DEC);
  Serial.print(':');
  Serial.print(now.minute(), DEC);
  Serial.print(':');
  Serial.print(now.second(), DEC);
  Serial.println();


  Serial.println();

}


  void keypad_Task(){

  char key = keypad.getKey();

  if (key != NO_KEY) {
    Serial.println(key);



}






}