// Include the AccelStepper Library
#include <AccelStepper.h>

// Define pin connections
const int dirPin = 18;
const int stepPin = 19;
const int buzzer = 5;
// const int reset_ = 25;

// const int switch_ = 4;
const int relay = 13;
const int gas = 34;

unsigned long previousMillis = 0;
unsigned long interval = 1000;  // Interval dalam milidetik (ms)
int countdownTime = 10;  // Waktu hitung mundur dalam detik
int tim = 10;

int gas_jalan = 0;

String command;

// Creates an instance
AccelStepper myStepper(AccelStepper::DRIVER, stepPin, dirPin);

void setup() {
  Serial.begin(115200);
  // pinMode(switch_, INPUT_PULLUP);
  // pinMode(reset_, INPUT_PULLUP);
  pinMode(relay, OUTPUT);
  pinMode(buzzer, OUTPUT);
  digitalWrite(relay, LOW);
  digitalWrite(buzzer, LOW);

  Serial.println("Type Command (bayar, habis)");

  // set the maximum speed, acceleration factor,
  // initial speed and the target position
  myStepper.setMaxSpeed(2000);
  myStepper.setAcceleration(20000);
  myStepper.setSpeed(2000);
}

void loop() {
  

  if (Serial.available()) {
    command = Serial.readStringUntil('\n');
    command.trim();
    unsigned long currentMillis = millis();

    if (command.equals("bayar")) {
      digitalWrite(relay, HIGH);
      int gas_jalan = analogRead(gas);
      // Serial.println(gas_jalan);
      // delay(500);
      // Change direction once the motor reaches target position
      myStepper.moveTo(gas_jalan);
      // Move the motor one step
      myStepper.run();

      if (currentMillis - previousMillis >= interval) {
        previousMillis = currentMillis;

        countdownTime--;

        Serial.print("Countdown: ");
        Serial.println(countdownTime);

        if (countdownTime <= 0) {
          Serial.println("Countdown Selesai");
          // Lakukan aksi setelah hitung mundur selesai
          // Contoh: mengirimkan sinyal, mengendalikan perangkat, dll.
          tone(buzzer, 200);
          // Set ulang hitung mundur ke nilai awal
          // countdownTime = 10;
          while (true) {
            // Tetap dalam loop tanpa melakukan apa-apa
          }
        }
      }
    }

    else if (command.equals("habis")) {
      noTone(buzzer);
      digitalWrite(relay, LOW);
    }

    else {
      Serial.println("bad command");
    }
    Serial.print("Command: ");
    Serial.println(command);
  }

}