/* ================= KONFIGURASI BLYNK & FIRMWARE ================= */
#define BLYNK_TEMPLATE_ID "TMPL6XNiUeSEi"
#define BLYNK_TEMPLATE_NAME "Jemuran Otomatis"
#define BLYNK_AUTH_TOKEN "OJGR8tDh4xfnAl2MwYmSXtaA5mzDXrUs"
#define BLYNK_PRINT Serial

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

/* ================= PIN ================= */
#define LDR_PIN    34  
#define RAIN_PIN   35  
#define DHT_PIN    15  
#define SERVO_PIN  13  
#define BUZZER_PIN 25  

#define DHTTYPE DHT22

/* ================= OBJEK ================= */
Servo jemuran;
DHT dht(DHT_PIN, DHTTYPE);
BlynkTimer timer;

/* ================= WIFI ================= */
char ssid[] = "Wokwi-GUEST";
char pass[] = "";

/* ================= STATE ================= */
bool jemuranDiLuar = true;

/* ================= KALIBRASI ================= */
const int batasHujan = 2000;
const int batasGelap = 1500;

/* ================= POSISI SERVO ================= */
const int POSISI_KELUAR = 15;
const int POSISI_MASUK  = 160;

/* ================= LATCH / DELAY AMAN ================= */
// jemuran baru boleh keluar kalau kondisi aman stabil
unsigned long lastBahayaTime = 0;
const unsigned long AMAN_DELAY = 3000; // 10 detik aman stabil

/* ================= SETUP ================= */
void setup() {
  Serial.begin(115200);

  /* ===== SERVO ===== */
  ESP32PWM::allocateTimer(0);
  ESP32PWM::allocateTimer(1);
  ESP32PWM::allocateTimer(2);
  ESP32PWM::allocateTimer(3);

  jemuran.setPeriodHertz(50);
  jemuran.attach(SERVO_PIN, 500, 2400);

  /* ===== SENSOR ===== */
  dht.begin();
  pinMode(LDR_PIN, INPUT);
  pinMode(RAIN_PIN, INPUT);
  pinMode(BUZZER_PIN, OUTPUT);

  /* ===== PRE-CHECK ===== */
  int cekHujan = analogRead(RAIN_PIN);
  int cekCahaya = analogRead(LDR_PIN);

  if (cekHujan < batasHujan || cekCahaya < batasGelap) {
    jemuran.write(POSISI_MASUK);
    jemuranDiLuar = false;
    lastBahayaTime = millis();
    Serial.println("BOOT: BAHAYA → DALAM");
  } else {
    jemuran.write(POSISI_KELUAR);
    jemuranDiLuar = true;
    Serial.println("BOOT: AMAN → LUAR");
  }

  /* ===== BLYNK ===== */
  Serial.println("Menghubungkan ke Blynk...");
  Blynk.begin(BLYNK_AUTH_TOKEN, ssid, pass);

  timer.setInterval(1000L, logikaUtama);
}

/* ================= LOOP ================= */
void loop() {
  Blynk.run();
  timer.run();
}

/* ================= LOGIKA UTAMA ================= */
void logikaUtama() {
  int nilaiHujan = analogRead(RAIN_PIN);
  int nilaiLDR   = analogRead(LDR_PIN);

  bool isHujan = nilaiHujan < batasHujan;
  bool isGelap = nilaiLDR < batasGelap;
  bool kondisiBahaya = isHujan || isGelap;

  /* ===== SIMPAN WAKTU TERAKHIR BAHAYA ===== */
  if (kondisiBahaya) {
    lastBahayaTime = millis();
  }

  /* ===== KASUS A: BAHAYA → MASUK ===== */
  if (kondisiBahaya && jemuranDiLuar) {
    Serial.println("STATUS: BAHAYA! Jemuran MASUK");

    jemuran.write(POSISI_MASUK);
    jemuranDiLuar = false;

    Blynk.virtualWrite(V0, "BAHAYA! Jemuran Masuk");
    Blynk.virtualWrite(V1, 1);
  }

  /* ===== KASUS B: AMAN STABIL → KELUAR ===== */
  else if (
    !kondisiBahaya &&
    !jemuranDiLuar &&
    (millis() - lastBahayaTime >= AMAN_DELAY)
  ) {
    Serial.println("STATUS: AMAN STABIL! Jemuran KELUAR");

    jemuran.write(POSISI_KELUAR);
    jemuranDiLuar = true;

    Blynk.virtualWrite(V0, "AMAN. Jemuran Keluar");
    Blynk.virtualWrite(V1, 0);
  }

  /* ===== BUZZER (TANPA TONE / TANPA PWM) ===== */
  digitalWrite(BUZZER_PIN, isHujan ? HIGH : LOW);

  /* ===== MONITOR ===== */
  Serial.print("Hujan: "); Serial.print(nilaiHujan);
  Serial.print(" | Cahaya: "); Serial.print(nilaiLDR);
  Serial.print(" | Bahaya: "); Serial.print(kondisiBahaya);
  Serial.print(" | TimerAman(ms): ");
  Serial.print(millis() - lastBahayaTime);
  Serial.print(" | Posisi: ");
  Serial.println(jemuranDiLuar ? "LUAR" : "DALAM");
}