// NBlizard 8/28/2022
// start egg timer from scratch
// then incorporate 4dig 7segment LED array and calls to show countdown time

byte BUTTON_1 = A0;
byte BUTTON_2 = A1;
byte BUTTON_3 = A2;
bool PRESSED = LOW;
bool BUTTON_1_STATE = !PRESSED;
bool BUTTON_2_STATE = !PRESSED;
bool BUTTON_3_STATE = !PRESSED;


void setup() {

  pinMode(BUTTON_1, INPUT_PULLUP);
  pinMode(BUTTON_2, INPUT_PULLUP);
  pinMode(BUTTON_3, INPUT_PULLUP);

  Serial.begin(9600);

}

void loop() {
  // put your main code here, to run repeatedly
  // initialize time to display
  int timeToDisplay = 0;

  // read state of button 1
  BUTTON_1_STATE = digitalRead(BUTTON_1);
  // debounce button
  BUTTON_2_STATE = digitalRead(BUTTON_2);
  // debounce button
  BUTTON_3_STATE = digitalRead(BUTTON_3);
  // debounce button

  if (BUTTON_1_STATE == PRESSED) {
    timeToDisplay = Button_1_SetTimer();
    // debounce button
    // reset state 
    BUTTON_1_STATE = !PRESSED;   
    // call countdowntimer
    //Serial.println(timeToDisplay);
    Count_Down_Timer(timeToDisplay);
  }
  if (BUTTON_2_STATE == PRESSED) {
    timeToDisplay = Button_2_SetTimer();
    // debounce button
    // reset state 
    BUTTON_2_STATE = !PRESSED;   
    // call countdowntimer
    //Serial.println(timeToDisplay);
    Count_Down_Timer(timeToDisplay);
  }
  

}
// function for Button_1
int Button_1_SetTimer () {
  // set display to  12 
  int timeToDisplay = 12;
  return timeToDisplay;
}
// function for Button_2
int Button_2_SetTimer () {
  // set display to  
  int timeToDisplay = 105;  // remember this is minutes:seconds, parse out seconds
  return timeToDisplay; 
}
void Count_Down_Timer (int displayTime) {
  
  int countDown = displayTime;
    for ( int countDown = displayTime; countDown >= 0; countDown--) {
    // set the time delay
    unsigned long futureTime = millis() + 1000;  // adding 1 second to future time
    

    // now do nothing for 1 second
    while ( millis() < futureTime) {
      // refresh display
      //check button3 for reset
      if (Check_Button_3())  {  // if reset, set counDown to 0 and break
        Serial.println("Reset");
        countDown = 0;
        break;
      }
      
    }
    // special case if 100 (1 minute)
    if (countDown == 99) {
      countDown = 59;
    }
    Serial.println(countDown);
  }
}
// this function continously checks for reset, it must be called in countdowntimer
bool Check_Button_3 () {
  // continue to read button 3 for reset
  bool Reset_Flag = false;
  BUTTON_3_STATE = digitalRead(BUTTON_3);
  if (BUTTON_3_STATE == PRESSED) {
    Reset_Flag = true;
  }
  return Reset_Flag;
}