int blue = 32;
int bluestate = LOW;
int green = 33;
int greenstate = LOW;
int btn = 22;
int grnbtn = 23;
int bluesw = 12;
bool lowbat = false;
int btnpushed = false;
unsigned long previousMillis = 0; 
const long ledinterval = 250;

unsigned long bluepreviousMillis = 0; 
const long blueledinterval = 3000;

int laststate = HIGH;
int currentstate;
unsigned long btnpressed = 0;
unsigned long btnreleased = 0;
const long btnduration = 500;

const long debounce_interval = 250;
unsigned long dbpreviousMillis = 0;
void setup() {
  // put your setup code here, to run once:
  Serial.begin(115200);
  Serial.println("Hello, ESP32!");
  pinMode(blue, OUTPUT);
  pinMode(green, OUTPUT);
  pinMode(btn, INPUT_PULLUP);
  pinMode(grnbtn, INPUT_PULLUP);
  pinMode(bluesw, INPUT_PULLUP);
}

void loop() {
  // put your main code here, to run repeatedly:
  // if (digitalRead(grnbtn) == LOW){
  //   unsigned long dbcurrentMillis = millis();
  //   if (dbcurrentMillis - dbpreviousMillis >= debounce_interval){
  //   dbpreviousMillis = dbcurrentMillis;
    currentstate = digitalRead(grnbtn);
      if (laststate == HIGH && currentstate == LOW){
        btnpressed = millis();
        Serial.print("btn pressed: ");
        Serial.println(btnpressed);
        //  btnpushed = true;
      }
      else if (laststate == LOW && currentstate == HIGH){
        btnreleased = millis();
        Serial.print("btn released: ");
        Serial.println(btnreleased);
        long duration = btnreleased - btnpressed;

        if(duration > btnduration){
          Serial.println("Longpress");
          // btnpushed = false;
        }
        else if(duration < btnduration){
        Serial.println("shortpress");
        // btnpushed = false;
        }
    //  }   
  
    laststate = currentstate;
    }
  // }


// if (digitalRead(grnbtn) == LOW){
//     digitalWrite(green,HIGH);
//     delay(50);
//     digitalWrite(green,LOW);
//   }

  if(digitalRead(bluesw) == LOW){
    unsigned long bluecurrentmillis = millis();
    if(bluecurrentmillis - bluepreviousMillis >= blueledinterval){
    digitalWrite(blue,HIGH);
    bluepreviousMillis = bluecurrentmillis;
    }
  }
  else{
    unsigned long bluecurrentmillis = millis();
    if(bluecurrentmillis - bluepreviousMillis >= blueledinterval){
    digitalWrite(blue,LOW);
    bluepreviousMillis = bluecurrentmillis;
    }
  }




  if (digitalRead(btn) == LOW){
    lowbat = true;
  }
  else{
    lowbat = false;
  }
  

  if (lowbat == true){
  unsigned long currentMillis = millis();
  if (currentMillis - previousMillis >= ledinterval){
    if (bluestate == LOW){
      bluestate = HIGH;
      greenstate = LOW;
    }
    else {
      greenstate = HIGH;
      bluestate = LOW;
    }
    digitalWrite(blue,bluestate);
    digitalWrite(green,greenstate);
    previousMillis = currentMillis;
  }
  else {
    digitalWrite(blue,LOW);
    digitalWrite(green,LOW);
  }
  }
  
  

}