//LCD code
#include <Wire.h> // Library for I2C communication
#include <LiquidCrystal_I2C.h> // Library for LCD

// Wiring: SDA pin is connected to A4 and SCL pin to A5.
// Connect to LCD via I2C, default address 0x27 (A0-A2 not jumpered)
LiquidCrystal_I2C lcd = LiquidCrystal_I2C(0x27, 16, 2); // Change to (0x27,20,4) for 20x4 LCD.

#include <IRremote.h> //including infrared remote header file 
int hrs = 0;
int mins = 0;

//This is to check if the time has been set (EQ has been pressed)
bool EQpressed = false;
//This integer is supposed to represent the RTC's time
int alarmHrs = 0;
int alarmMins = 0;

//Remote Code
int RECV_PIN = 2; // the pin where you connect the output pin of IR sensor
IRrecv irrecv(RECV_PIN);
decode_results results;


//Buzzer Code
#include <TimerFreeTone.h>

#define TONE_PIN 3 // Pin you have speaker/piezo connected to (be sure to include a 100 ohm resistor).


//RGB Module
#define LEDR 5
#define LEDG 5
#define LEDB 4

int r = 0;
int g = 0;
int b = 0;

//RFID 
#include <SPI.h>
#include <MFRC522.h>
 
#define SS_PIN 10
#define RST_PIN 9
MFRC522 mfrc522(SS_PIN, RST_PIN);   // Create MFRC522 instance.

//RTC Module
#include  <virtuabotixRTC.h>  //Library used


//Wiring SCLK -> 6, I/O -> 7, CE -> 8
//Or     CLK -> 6 , DAT -> 7, Reset -> 8

virtuabotixRTC myRTC(6,7,8); //If you change the wiring change the pins here also




void setup() {
  // put your setup code here, to run once:
  myRTC.updateTime();
  hrs = 0;
  mins = 0;
  
  //RFID as Push Button Sensor
  SPI.begin();      // Initiate  SPI bus
  mfrc522.PCD_Init();   // Initiate MFRC522
   
  //RGB Module
  pinMode(LEDR, OUTPUT);
  pinMode(LEDG, OUTPUT);
  pinMode(LEDB, OUTPUT);
  
  //Buzzer Code
  //pinMode(buzzer, OUTPUT); // Set buzzer - pin 3 as an output
  
 //LCD Code
 lcd.init();
 lcd.backlight();
 lcd.begin(16,2); 
 
 lcd.clear();
 lcd.setCursor(0,0); 
 lcd.print("Time: "); lcd.print(myRTC.hours); lcd.print(":"); lcd.print(myRTC.minutes);
 lcd.setCursor(0,1);
 lcd.print("Input alarm time");
 delay(1000);
  
 lcd.clear();
 lcd.setCursor(0,0); 
 lcd.print("Time: "); lcd.print(myRTC.hours); lcd.print(":"); lcd.print(myRTC.minutes);
 lcd.setCursor(0,1);
 lcd.print("CH+/CH- for mins");
 delay(1000);  
   
 lcd.clear();
 lcd.setCursor(0,0); 
 lcd.print("Time: "); lcd.print(myRTC.hours); lcd.print(":"); lcd.print(myRTC.minutes); 
 lcd.setCursor(0,1);
 lcd.print("+/- for hrs");
 delay(1000);
  
 lcd.clear();
 lcd.setCursor(0,0); 
 lcd.print("Time: "); lcd.print(myRTC.hours); lcd.print(":"); lcd.print(myRTC.minutes);
  
 //IR Remote
 irrecv.enableIRIn();
  
}

void loop() {
  // put your main code here, to run repeatedly:

  uint32_t readResults = results.value;// Results of decoding are stored in result.value
  
  //Remote input code
  if (irrecv.decode(&results)){// Returns 0 if no data ready, 1 if data ready.
    
    int readResults = results.value;// Results of decoding are stored in result.value
    Serial.println(results.value);
    switch ( results.value) {
      case 16754775 :
      {
        //VOL+
        hrs +=1;   
        //Makes sure user doesn't input invalid hours
        if(hrs > 23){
            hrs = 0;
        }
        lcd.clear();
        lcd.setCursor(0,0); 
        lcd.print("Time: "); lcd.print(myRTC.hours); lcd.print(":"); lcd.print(myRTC.minutes); 
        lcd.setCursor(0,1);
        lcd.print(hrs); lcd.print(":"); lcd.print(mins);
        delay(100);
        break;
      }
      case 16769055 :
      {
        //VOL-
        hrs -=1;
        //Makes sure user doesn't input invalid hours
        if(hrs < 0){
            hrs = 23;
        }
        lcd.clear();
        lcd.setCursor(0,0); 
        lcd.print("Time: "); lcd.print(myRTC.hours); lcd.print(":"); lcd.print(myRTC.minutes); 
        lcd.setCursor(0,1);
        lcd.print(hrs); lcd.print(":"); lcd.print(mins);
        delay(100);
        break;
      }
      case 16769565 :
      {
        //CH+
        mins +=1;

       //Makes sure user doesn't input invalid minutes
        if(mins > 59){
            mins = 0;
        }
        lcd.clear();
        lcd.setCursor(0,0); 
        lcd.print("Time: "); lcd.print(myRTC.hours); lcd.print(":"); lcd.print(myRTC.minutes);
        lcd.setCursor(0,1);
        lcd.print(hrs); lcd.print(":"); lcd.print(mins);
        delay(100);
        break;
      }
      case 16753245 :
      {
        //CH-
        mins -=1;

        //Makes sure user doesn't input invalid minutes
        if(mins < 0){
            mins = 59;
        }
        lcd.clear();
        lcd.setCursor(0,0); 
        lcd.print("Time: "); lcd.print(myRTC.hours); lcd.print(":"); lcd.print(myRTC.minutes);
        lcd.setCursor(0,1);
        lcd.print(hrs); lcd.print(":"); lcd.print(mins);
        delay(100);
        break;
      }
      case 16738455 : //This case is only for this TinkerCad Simulation and represents the RTC hitting the desired alarm time.
      {
        alarmHrs = 17;
        alarmMins = 20;
      }
      case 16748655 :
      {
        EQpressed = true;
        //EQ
        lcd.clear();
        lcd.setCursor(0,0); 
        lcd.print("Time: "); lcd.print(myRTC.hours); lcd.print(":"); lcd.print(myRTC.minutes);
        lcd.setCursor(0,1);
        lcd.print("Input Valid");
        delay(1000);
        lcd.setCursor(0,1);
        lcd.print("Alarm Set for ");
        delay(1000);
        
        lcd.clear();
        lcd.setCursor(0,0); 
        lcd.print("Time: "); lcd.print(myRTC.hours); lcd.print(":"); lcd.print(myRTC.minutes);
        lcd.setCursor(0,1);
        lcd.print(hrs); lcd.print(":"); lcd.print(mins);
        delay(1000);
        break;
      }
      
    }//End of Switch Statement
    myRTC.updateTime();
    lcd.setCursor(0,0); 
    lcd.print("Time: "); lcd.print(myRTC.hours); lcd.print(":"); lcd.print(myRTC.minutes);
    
    irrecv.resume(); // Restart the ISR state machine and Receive the next value
  }//End of If statement
 
  //Alarm code
    if( hrs == myRTC.hours && mins == myRTC.minutes && EQpressed == true){

        myRTC.updateTime();
        lcd.setCursor(0,0); 
        lcd.print("Time: "); lcd.print(myRTC.hours); lcd.print(":"); lcd.print(myRTC.minutes);
        
        TimerFreeTone( 3, 1000, 1000 , 10  );
        TimerFreeTone( 3, 800, 1000 , 10  );
        TimerFreeTone( 3, 600, 1000 , 10  );
        TimerFreeTone( 3, 400, 1000 , 10  );
        TimerFreeTone( 3, 600, 1000 , 10  );
        TimerFreeTone( 3, 800, 1000 , 10  );
        TimerFreeTone( 3, 1000, 1000 , 10  );

         myRTC.updateTime();
         lcd.setCursor(0,0); 
         lcd.print("Time: "); lcd.print(myRTC.hours); lcd.print(":"); lcd.print(myRTC.minutes);
         
        //RGB Light Pattern
        r=255;
        g = 0;
        b = 0;
        analogWrite(LEDG, r);
        analogWrite(LEDG, g);
        analogWrite(LEDB, b);
        delay(1000);
        r-0;
        g = 255;
        b =0;
        analogWrite(LEDG, r);
        analogWrite(LEDG, g);
        analogWrite(LEDB, b);
        delay(1000);
        r=0;
        g = 0;
        b =255;
        analogWrite(LEDG, r);
        analogWrite(LEDG, g);
        analogWrite(LEDB, b);
        delay(1000);
  }


     // Select one of the cards
        if ( ! mfrc522.PICC_ReadCardSerial()) 
        {
          return;
        }
        String content= "";
        byte letter;
        for (byte i = 0; i < mfrc522.uid.size; i++) 
        {
           Serial.print(mfrc522.uid.uidByte[i] < 0x10 ? " 0" : " ");
           Serial.print(mfrc522.uid.uidByte[i], HEX);
           content.concat(String(mfrc522.uid.uidByte[i] < 0x10 ? " 0" : " "));
           content.concat(String(mfrc522.uid.uidByte[i], HEX));
        }
        content.toUpperCase();
        Serial.println( content.substring(1) );
        if (content.substring(1) == "C6 E9 4C 63") //change here the UID of the card/cards that you want to give access
        {
          TimerFreeTone( 3, 1000, 1 , 0 );
          
          EQpressed == false;
          
          content = "";

           myRTC.updateTime();
            
          
           r=0;
           g=0;
           b=0;
           analogWrite(LEDG, r);
           analogWrite(LEDG, g);
           analogWrite(LEDB, b);
      
           
           lcd.clear();
           lcd.setCursor(0,0); 
           lcd.print("Time: "); lcd.print(myRTC.hours); lcd.print(":"); lcd.print(myRTC.minutes);
           lcd.setCursor(0,1);
           lcd.print("Alarm Off");
           delay(1000);
        }
  
}