/* Hello Wokwi! */

#include <LiquidCrystal_I2C.h>

LiquidCrystal_I2C lcd(0x27, 20, 4);

 int val1;// reads the value of the potentiometer (value between 0 and 1023)
 int val2;
 int val3;

void setup() {
  lcd.init();
  lcd.backlight();

  //setup potentiometers
   val1 = analogRead(A0);
   val1 = map(val1, 0, 1023, 0, 60);
   val2 = analogRead(A1);
   val2 = map(val2, 0, 1023, 0, 60);
   val3 = analogRead(A2);
   val3 = map(val3, 0, 1023, 0, 60);

  // setup buttons
   pinMode(2, INPUT_PULLUP);
   pinMode(3, INPUT_PULLUP);
   pinMode(4, INPUT_PULLUP);
   pinMode(5, INPUT_PULLUP);

  // setup labels
   pinMode(8, OUTPUT);
   pinMode(9, OUTPUT);
   pinMode(10, OUTPUT);

  Serial.begin(9600);
}

void setTimers() {
// get pontetiometers values
   int analog1 = analogRead(A0);
   analog1 = map(analog1, 0, 1023, 0, 60);

   int analog2 = analogRead(A1);
   analog2 = map(analog2, 0, 1023, 0, 60);

   int analog3 = analogRead(A2);
   analog3 = map(analog3, 0, 1023, 0, 60);
   
   String message = "";
  //  if first potentiomenter value change prelare message
   if (val1 != analog1) {
     message = String("1st timer: " + String(val1) + "s");
     val1 = analog1;
   }

   if (val2 != analog2) {
     val2 = analog2;
     message = String("2nd timer: " + String(val2) + "s");
   }

   if (val3 != analog3) {
     val3 = analog3;
     message = String("3rd timer: " + String(val3) + "s");
   }

  
  if (message.length() != 0) {
    lcd.print(message);               
  }
}

void startProcess() {
  startPhase1();
  startPhase2();
  startPhase3();
}

void startPhase1() {
  digitalWrite(8, HIGH);
  delay(val1*1000);
  digitalWrite(8, LOW);
}

void startPhase2() {
  digitalWrite(9, HIGH);
  delay(val2*1000);
  digitalWrite(9, LOW);
}

void startPhase3() {
  digitalWrite(10, HIGH);
  delay(val3*1000);
  digitalWrite(10, LOW);
}

void stop() {
  digitalWrite(10, LOW);
  digitalWrite(9, LOW);
  digitalWrite(8, LOW);
}

void loop() { 
  setTimers();

 if (digitalRead(5) == LOW) {
    stop();
    lcd.print("Stop Process");   
  }

  if (digitalRead(2) == LOW) {
    startProcess();
    lcd.print("Start Process");   
  }

  if (digitalRead(3) == LOW) {
    startPhase2();
    lcd.print("Button Phase 2 Press");   
  }

  if (digitalRead(4) == LOW) {
    startPhase3();
    lcd.print("Button Phase 3 Press");   
  }

  
  delay(100);      
  lcd.clear();
}