#include <LiquidCrystal.h>
long int set1;
long int set2;
long int set3;
long int set4;
long int j;
String hours;
String minutes;
String seconds;
int program;


LiquidCrystal lcd(7,6, 5, 8, 3, 2); // Creates an LC object. Parameters: (rs, enable, d4, d5, d6, d7)
 int t1, t2, t3, t4, t5, t6;
 int r1, r2, r3;
 int s1, s2, s3;

 
boolean feed = true; // condition for alarm
 char key;
 String r[8];

 int cycle=1;
 int sequence=0; 

 void setup() 
 { 
  analogWrite(9,40); //contrast
  lcd.begin(16,2);
  Serial.begin(9600);
  pinMode(A0, INPUT_PULLUP);
  pinMode(A1, INPUT_PULLUP);
  pinMode(A2, INPUT_PULLUP);
  pinMode(A3, INPUT_PULLUP);
  pinMode(A4, OUTPUT);


 } 

 
 void loop() 
 { // 1 open

    if(sequence==0&&cycle==1)
    { // 1,2 open
      lcd.setCursor(0,0);
      lcd.print("   TENS TIMER   ");
      lcd.setCursor(0,1);
      lcd.print("  PRESS  START  ");
    } // 2 close, 1 open
    else
    { // 1,3 open
      lcd.setCursor(0,0);
      lcd.print("   TENS TIMER   ");
      lcd.setCursor(0,1);
      lcd.print("  PRESS  NEXT  ");
    } // 3 close, 1 open

      if (digitalRead(A0)==0&&sequence==0&&cycle==1||digitalRead(A1)==0&&sequence==0&&cycle>1) //
      { // 1, 4 open
      int r[] = {0, 0, 3, 0, 0, 0};
      sequence=1;
      int program = 2;        
      lcd.clear();
      
//      setFeedingTime(); 
      for(int i = 0; i < 6; i++)  // this for loop is used to get the value of the feeding time and print it serially
      { // 1,4,5 open
       Serial.print(r[i]);
       Serial.println();
      } // 5 close, 1,4 open
     
   hours = String (r[0]) + String (r[1]) ; //combining two separate int values of r[0] and r[1] into one string and save it to "hours" 
   minutes = String (r[2]) + String (r[3]) ;  //combining two separate int values of r[2] and r[3] into one string and save it to "minutes" 
   seconds = String (r[4]) + String (r[5]) ;  //combining two separate int values of r[4] and r[5] into one string and save it to "seconds" 

/*
   hours = String(01); //combining two separate int values of r[0] and r[1] into one string and save it to "hours" 
   minutes = String(00);  //combining two separate int values of r[2] and r[3] into one string and save it to "minutes" 
   seconds = String(00);  //combining tw
*/  
  set1 = (hours.toInt()*3600); //converting hours into seconds
  set2 = (minutes.toInt() * 60);  //converting minutes into seconds
  set3 = seconds.toInt();
  set4 = (hours.toInt() * 3600)+ (minutes.toInt() * 60) + seconds.toInt(); //adding set1, set2 and set3 together in set4
  Serial.print("set4");
  Serial.print(set4);
  Serial.println();
  lcd.setCursor(0,0);
  lcd.print("Countdown begins");
  delay(1000);
  lcd.clear();
  
  for(long int j = set4; j >= 0; j--) // this for loopis used to decrease the total time in seconds
  { // 1,4,6 open
  Serial.println(j);
  
  lcd.setCursor(0,0);
  lcd.print(" TENS TIMER  P");
  lcd.print(program);
  
  long int HH = j / 3600; // converting the remaining time into remaining hours
  lcd.setCursor(0,1);
  Serial.println(HH);
  if (HH < 10) { lcd.print('0');  }
  lcd.print(HH);
  lcd.print(":");
  
  long int MM = (j - (HH*3600))/60 ; //converting the remaining time into remaining minutes
  lcd.setCursor(3,1);
  Serial.println(MM);
  if (MM < 10) { lcd.print('0');  }
  lcd.print(MM);
  lcd.print(":");
  
  long int SS = j - ((HH*3600)+(MM*60)); //converting the remaining time into remaining seconds
  lcd.setCursor(6,1);
  Serial.println(SS);
  if (SS < 10) { lcd.print('0');  } 
  lcd.print(SS);
  
  
  lcd.setCursor(9,1);
  lcd.print("cycle ");
  lcd.print(cycle);
  delay(1000);

  
  if (digitalRead(A2)==0){break;} 
   if (j == 0)
    
    { // 1,4,6,7 open
      lcd.clear();
      lcd.setCursor(0,0);
      lcd.print("Tens Timer Beep");
      lcd.setCursor(1,1);
      lcd.print("End P2 cycle ");
      lcd.print(cycle);     

    for(int k =0; k<= 200; k++) //this for loop is used for the buzzer to beep 200 time as the timer reaches zero
      { //1,4,6,7,8 open
        digitalWrite(A4,HIGH);
        delay(300);
        digitalWrite(A4,LOW);  
        delay(300); 
        if (digitalRead(A1)==0){break;}  
      } // 8 close 1,4,6,7 open

    } // 7 close 1,4,6 open

   
   } // 6 close, 1,4 open 
  } // 4 close, 1 open




    if(sequence==1)
    { // 1,9 open
      lcd.setCursor(0,0);
      lcd.print("   TENS TIMER   ");
      lcd.setCursor(0,1);
      lcd.print("  PRESS  NEXT  ");
    } // 9 close 1 open
      //Serial.println(A3);
      if (digitalRead(A1)==0&&sequence==1) //
//      if (digitalRead(A0)==0&&sequence==0&&cycle==1||digitalRead(A1)==0&&sequence==0&&cycle>1) //      
      { // 1,10 open
        int s[] = {0, 1, 0, 0, 0, 0};
        sequence=0;
       program = 1;        
      lcd.clear();
      
//      setFeedingTime(); 
      for(int i = 0; i < 6; i++)  // this for loop is used to get the value of the feeding time and print it serially
      { // 1,10,11 open
       Serial.print(s[i]);
       Serial.println();
      } // 11 close 1,10 open
     
   hours = String (s[0]) + String (s[1]) ; //combining two separate int values of r[0] and r[1] into one string and save it to "hours" 
   minutes = String (s[2]) + String (s[3]) ;  //combining two separate int values of r[2] and r[3] into one string and save it to "minutes" 
   seconds = String (s[4]) + String (s[5]) ;  //combining two separate int values of r[4] and r[5] into one string and save it to "seconds" 

/*
   hours = String(01); //combining two separate int values of r[0] and r[1] into one string and save it to "hours" 
   minutes = String(00);  //combining two separate int values of r[2] and r[3] into one string and save it to "minutes" 
   seconds = String(00);  //combining tw
*/  
  set1 = (hours.toInt()*3600); //converting hours into seconds
  set2 = (minutes.toInt() * 60);  //converting minutes into seconds
  set3 = seconds.toInt();
  set4 = (hours.toInt() * 3600)+ (minutes.toInt() * 60) + seconds.toInt(); //adding set1, set2 and set3 together in set4
  Serial.print("set4");
  Serial.print(set4);
  Serial.println();
  lcd.setCursor(0,0);
  lcd.print("Countdown begins");
  delay(1000);
  lcd.clear();
  
  for(long int j = set4; j >= 0; j--) // this for loopis used to decrease the total time in seconds
  { // 1,10,12 open
  Serial.println(j);
  
  lcd.setCursor(0,0);
  lcd.print(" TENS TIMER  P");
  lcd.print(program);
  
  long int HH = j / 3600; // converting the remaining time into remaining hours
  lcd.setCursor(0,1);
  Serial.println(HH);
  if (HH < 10) { lcd.print('0');  }
  lcd.print(HH);
  lcd.print(":");
  
  long int MM = (j - (HH*3600))/60 ; //converting the remaining time into remaining minutes
  lcd.setCursor(3,1);
  Serial.println(MM);
  if (MM < 10) { lcd.print('0');  }
  lcd.print(MM);
  lcd.print(":");
  
  long int SS = j - ((HH*3600)+(MM*60)); //converting the remaining time into remaining seconds
  lcd.setCursor(6,1);
  Serial.println(SS);
  if (SS < 10) { lcd.print('0');  } 
  lcd.print(SS);
  
  
  lcd.setCursor(9,1);
  lcd.print("cycle ");
  lcd.print(cycle);
  delay(1000);


  
  if (digitalRead(A2)==0){break;} 
   if (j == 0)
    
    { // 1,10,12,13 open
      lcd.clear();
      lcd.setCursor(0,0);
      lcd.print("Tens Timer Beep");
      lcd.setCursor(1,1);
      lcd.print("End P1 cycle ");
      lcd.print(cycle);
      

    for(int k =0; k<= 200; k++) //this for loop is used for the buzzer to beep 200 time as the timer reaches zero
      { // 1,10,12,13,14 open
        digitalWrite(A4,HIGH);
        delay(300);
        digitalWrite(A4,LOW);  
        delay(300); 
        if (digitalRead(A1)==0){break;}  
      } // 14 close 1,10,12,13 open

    } // 13 close 1,10,12 open
   } // 12 close 1,10 open
     cycle++;
  }  // 10 close 1 open
}  // 1 close