#define DIR_PIN 3
#define STEP_PIN 2
#define EN_PIN 4

#define RIGHT_PIN 8
#define LEFT_PIN 7
#define stepsPerRevolution 5000


String data;
char d1;

void setup() {
  // put your setup code here, to run once:
  Serial.begin(9600);
  pinMode(EN_PIN, OUTPUT);
  digitalWrite(EN_PIN, HIGH); // Deactivate driver (LOW active)
  pinMode(DIR_PIN, OUTPUT); 
  digitalWrite(DIR_PIN, LOW); // LOW or HIGH
  pinMode(STEP_PIN, OUTPUT);
  digitalWrite(STEP_PIN, LOW);
  digitalWrite(EN_PIN, LOW); // Activate driver
  // Inch ka chka Maria
  pinMode(RIGHT_PIN, INPUT_PULLUP);
  pinMode(LEFT_PIN, INPUT_PULLUP);

}

void loop() {

  int botton_Left = digitalRead(LEFT_PIN);
  int botton_Right = digitalRead(RIGHT_PIN);

  // put your main code here, to run repeatedly:
  if (Serial.available()){
    data = Serial.readString();
    d1 = data.charAt(0);
    if(d1 == 'p'){
      digitalWrite(DIR_PIN, HIGH);
      for (int i =1; i <= 1000000; i++) {
        digitalWrite(STEP_PIN, HIGH);
        delayMicroseconds(500000/stepsPerRevolution);
        digitalWrite(STEP_PIN, LOW);
        delayMicroseconds(500000/stepsPerRevolution);
        botton_Left = digitalRead(LEFT_PIN);
        botton_Right = digitalRead(RIGHT_PIN);
        if (botton_Left == 0){
          digitalWrite(DIR_PIN,LOW);
          // break;
        } if (botton_Right == 0) {
          digitalWrite(DIR_PIN, HIGH);
          // break;
        }
        if (Serial.available()){
          data = Serial.readString();
          d1 = data.charAt(0);
          if(d1 == 's'){
            break; 
        }
      }
    }
    }
    else if (d1 == 'a') {
      digitalWrite(DIR_PIN, HIGH);
      for (int i =1; i <= 1000000; i++) {
        digitalWrite(STEP_PIN, HIGH);
        delayMicroseconds(500000/stepsPerRevolution);
        digitalWrite(STEP_PIN, LOW);
        delayMicroseconds(500000/stepsPerRevolution);
        botton_Left = digitalRead(LEFT_PIN);
        // int botton_Right = digitalRead(RIGHT_PIN);
        if (botton_Left == 0){
          break;
        } 
      }
    }
  }
}