#define BLYNK_PRINT Serial

#define BLYNK_TEMPLATE_ID "TMPL6ThNGok00"
#define BLYNK_TEMPLATE_NAME "V"
#define BLYNK_AUTH_TOKEN "oAls8_bRApWPoTCwtIqtJOSZkQF_bR6j"

#define ECHO_PIN 18
#define TRIG_PIN 5
#define BUZZER_PIN 4      
#define MAX_HEIGHT_CM 20.0 
#define OLI_FULL 2.0

#include <WiFi.h>
#include <BlynkSimpleEsp32.h>

char auth[] = BLYNK_AUTH_TOKEN;
char ssid[] = "Wokwi-GUEST";   // Nama jaringan di Wokwi
char pass[] = "";              // Tanpa password

bool brio = false;
bool brv = false;
bool filter = false;
float triggerVolume = 0.0;  

void setup() {
  Serial.begin(115200);
  pinMode(TRIG_PIN, OUTPUT);
  pinMode(ECHO_PIN, INPUT);
  pinMode(BUZZER_PIN, OUTPUT);

  Blynk.begin(auth, ssid, pass);
  Serial.println("Pilih menu");
}

void loop() {
  Blynk.run(); // Mengaktifkan Blynk
  
  float distance = measureDistance();
  float volume = calculateOilVolume(distance);
  
  Serial.print("Distance: ");
  Serial.print(distance);
  Serial.print(" cm | Oil Volume: ");
  Serial.print(volume);
  Serial.println(" liters");

  updateTriggerVolume();

  Blynk.virtualWrite(V4, volume * 1000);

  if (volume >= triggerVolume) {
    activateBuzzer();
    tone(BUZZER_PIN, 1000);
  } else {
    noTone(BUZZER_PIN);
    deactivateBuzzer();
  }

  delay(1000);
}

// Fungsi untuk menerima input dari Blynk Virtual Pin (V1, V2 dan V3)
BLYNK_WRITE(V1) {
  brio = param.asInt();
  Serial.println("BRIO");
  Serial.println(brio ? "Dipilih" : "Dilepas");
}

BLYNK_WRITE(V2) {
  brv = param.asInt();
  Serial.println("BRV");
  Serial.println(brv ? "Dipilih" : "Dilepas");
}

BLYNK_WRITE(V3) {
  filter = param.asInt();
  Serial.print("FILTER");
  Serial.println(filter ? "Dipilih" : "Dilepas");
}

void updateTriggerVolume() {
  if (brio && filter) {
    triggerVolume = 0.799;
    Serial.println("Kombinasi BRIO dan FILTER dipilih (3200 mL)");
    Blynk.virtualWrite(V5, 3200);
  } else if (brv && filter) {
    triggerVolume = 0.699;
    Serial.println("Kombinasi Menu BRV dan FILTER dipilih (3300 mL)");
    Blynk.virtualWrite(V5, 3300);
  } else if (brio) {
    triggerVolume = 0.99;
    Serial.println("Menu BRIO dipilih (3000 mL)");
    Blynk.virtualWrite(V5, 3000);
  } else if (brv) {
    triggerVolume = 0.899;
    Serial.println("Menu BRV dipilih (3100 mL)");
    Blynk.virtualWrite(V5, 3100);
  } else {
    triggerVolume = 0.0;
    Serial.println("Tidak ada menu yang dipilih");
  }
}

float measureDistance() {
  digitalWrite(TRIG_PIN, LOW);
  delayMicroseconds(2);
  digitalWrite(TRIG_PIN, HIGH);
  delayMicroseconds(10);
  digitalWrite(TRIG_PIN, LOW);

  long duration = pulseIn(ECHO_PIN, HIGH);
  float distanceCm = duration * 0.034 / 2;

  return distanceCm;
}

float calculateOilVolume(float distance) {
  float filledHeight = MAX_HEIGHT_CM - distance;  // Tinggi oli yang terisi
  float volume = (filledHeight / MAX_HEIGHT_CM) * OLI_FULL;
  
  return volume;
}

void activateBuzzer() {
  digitalWrite(BUZZER_PIN, HIGH);
  Serial.println("Buzzer ON");
}

void deactivateBuzzer() {
  digitalWrite(BUZZER_PIN, LOW);
  Serial.println("Buzzer OFF");
}