// Blynk setup
#define BLYNK_TEMPLATE_ID "TMPL6iXcPCg-g"
#define BLYNK_TEMPLATE_NAME "Deteksi Banjir"
#define BLYNK_AUTH_TOKEN "IfYIgIoMnTbB_ScBUv50aKBQWoZNDdpM"

#include <WiFi.h>
#include <WiFiClient.h>
#include <BlynkSimpleEsp32.h>
#include <DHT.h>
#include <ESP32Servo.h>
#include <LiquidCrystal_I2C.h>

char auth[] = BLYNK_AUTH_TOKEN;
char ssid[] = "Wokwi-GUEST";
char pass[] = "";

// Konstanta dan pin
#define TRIG_PIN 25
#define ECHO_PIN 26
#define RAIN_PIN 34
#define DHT_PIN 4
#define SERVO_PIN 2
#define BUZZER_PIN 5
#define LED_HIJAU 19
#define LED_KUNING 18
#define LED_MERAH 15

#define DHTTYPE DHT22
DHT dht(DHT_PIN, DHTTYPE);
Servo servo;
LiquidCrystal_I2C lcd(0x27, 16, 2);

boolean st;

void setup() {
  Serial.begin(115200);
  dht.begin();
  servo.attach(SERVO_PIN);
  lcd.init();
  lcd.backlight();

  pinMode(TRIG_PIN, OUTPUT);
  pinMode(ECHO_PIN, INPUT);
  pinMode(BUZZER_PIN, OUTPUT);
  pinMode(LED_HIJAU, OUTPUT);
  pinMode(LED_KUNING, OUTPUT);
  pinMode(LED_MERAH, OUTPUT);

  servo.write(180); // posisi awal tertutup
  lcd.clear();
  lcd.setCursor(0, 0);
  lcd.print("Deteksi Banjir");

  Blynk.begin(auth, ssid, pass);
  while (!st) {
    st = Blynk.connected();
    delay(100);
  }

  delay(2000);
}

void loop() {
  Blynk.run();

  // Baca sensor
  float suhu = dht.readTemperature();
  float kelembaban = dht.readHumidity();

  if (isnan(suhu) || isnan(kelembaban)) {
    Serial.println("Gagal baca DHT!");
    return;
  }

  long durasi, jarak;
  digitalWrite(TRIG_PIN, LOW);
  delayMicroseconds(2);
  digitalWrite(TRIG_PIN, HIGH);
  delayMicroseconds(10);
  digitalWrite(TRIG_PIN, LOW);
  durasi = pulseIn(ECHO_PIN, HIGH);
  jarak = durasi * 0.034 / 2;

  int curahHujan = analogRead(RAIN_PIN);

  // Buzzer jika air terlalu dekat
  if (jarak <= 10) {
    tone(BUZZER_PIN, 2000);
  } else {
    noTone(BUZZER_PIN);
  }

  // Servo buka jika hujan
  if (curahHujan < 500) {
    servo.write(0); // buka saluran air
  } else {
    servo.write(180); // tutup
  }

  // Indikasi suhu
  if (suhu >= 32) {
    digitalWrite(LED_HIJAU, HIGH);
    digitalWrite(LED_KUNING, LOW);
    digitalWrite(LED_MERAH, LOW);
  } else if (suhu >= 21 && suhu < 32) {
    digitalWrite(LED_HIJAU, LOW);
    digitalWrite(LED_KUNING, HIGH);
    digitalWrite(LED_MERAH, LOW);
  } else {
    digitalWrite(LED_HIJAU, LOW);
    digitalWrite(LED_KUNING, LOW);
    digitalWrite(LED_MERAH, HIGH);
  }

  // Tampilkan di LCD
  lcd.clear();
  lcd.setCursor(0, 0);
  lcd.print("S:");
  lcd.print(suhu, 1);
  lcd.print("C H:");
  lcd.print(kelembaban, 0);
  lcd.print("%");

  lcd.setCursor(0, 1);
  lcd.print("J:");
  lcd.print(jarak);
  lcd.print("cm R:");
  lcd.print(curahHujan);

  // Kirim ke Blynk
  Blynk.virtualWrite(V0, jarak);
  Blynk.virtualWrite(V1, suhu);
  Blynk.virtualWrite(V2, kelembaban);
  Blynk.virtualWrite(V3, curahHujan);

  delay(2000);
}