#define BLYNK_TEMPLATE_ID "TMPL6oNoY-xHt"
#define BLYNK_TEMPLATE_NAME "Amzar"
#define BLYNK_AUTH_TOKEN "0t89CxFjKk0WEiUe5sS2_f9LZAROqIbD"


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


char auth[] = "0t89CxFjKk0WEiUe5sS2_f9LZAROqIbD";
char ssid[] = "Wokwi-GUEST";
char pass[] = "";

#define DHT_PIN 4
#define DHT_TYPE DHT22
#define RELAY1_PIN 5 
#define RELAY2_PIN 18

DHT dht(DHT_PIN, DHT_TYPE);
LiquidCrystal_I2C lcd(0x27, 16, 2);
BlynkTimer timer;

float temperature = 0;
float humidity = 0;
bool relay1State = false;
bool relay2State = false;
bool autoMode = true;
float tempThreshold = 28.0;
float humidThreshold = 60.0;
unsigned long lastUpdate = 0;
const unsigned long updateInterval = 2000;

void setup() {
  Serial.begin(115200);

  pinMode(RELAY1_PIN, OUTPUT);
  pinMode(RELAY2_PIN, OUTPUT);
  digitalWrite(RELAY1_PIN, LOW);
  digitalWrite(RELAY2_PIN, LOW);

  dht.begin();
  lcd.init();
  lcd.backlight();

  lcd.setCursor(0, 0);
  lcd.print("Sistem Starting...");
  lcd.setCursor(0, 1);
  lcd.print("Connect WiFi...");

  Blynk.begin(auth, ssid, pass);
  
  timer.setInterval(2000L, blynkUpdate);
  
  Serial.println("=== SISTEM SIAP ===");
  lcd.clear();
  lcd.print("Blynk ON");
  delay(1000);
}

void loop() {
  Blynk.run();
  timer.run();
  
  if (millis() - lastUpdate > updateInterval) {
    readSensors();
    updateDisplay();
    printToSerial();
    lastUpdate = millis();
  }
}

void readSensors() {
  temperature = dht.readTemperature();
  humidity = dht.readHumidity();
  
  if (isnan(temperature) || isnan(humidity)) {
    Serial.println(" DHT Read Failed!");
    temperature = 0;
    humidity = 0;
    return;
  }
}

// ========================= BLYNK FUNCTIONS =========================
// Update data ke Blynk (3 widget: V0=Switch, V1=Suhu, V2=Kelembaban)

void blynkUpdate() {
  Blynk.virtualWrite(V1, temperature);  // Suhu ke Value Display V1
  Blynk.virtualWrite(V2, humidity);     // Kelembaban ke Value Display V2
}

// Blynk Switch V0 - Manual Control Relay
BLYNK_WRITE(V0) {
  relay1State = param.asInt();
  digitalWrite(RELAY1_PIN, relay1State);
  Serial.println("Relay1: " + String(relay1State ? "ON" : "OFF"));
}

// Relay 2 Switch (V1) - Pelembab/Lampu
BLYNK_WRITE(V3) {
  relay2State = param.asInt();
  digitalWrite(RELAY2_PIN, relay2State);
  Serial.println("Relay2: " + String(relay2State ? "ON" : "OFF"));
}

BLYNK_WRITE(V5) {
  autoMode = param.asInt();
  Serial.println("Auto Mode: " + String(autoMode ? "ON" : "OFF"));
}


// ========================= DISPLAY =========================
void updateDisplay() {
  lcd.clear();
  
  // Baris 1: Suhu & Kelembaban
  lcd.setCursor(0, 0);
  lcd.print("T:");
  lcd.print(temperature, 1);
  lcd.print("C H:");
  lcd.print(humidity, 1);
  lcd.print("%");
  
  // Baris 2: Relay + Threshold
  lcd.setCursor(0, 1);
  lcd.print("R1:");
  lcd.print(relay1State ? "ON" : "OFF");
  lcd.print(" R2:");
  lcd.print(relay2State ? "ON" : "OFF");
}

void printToSerial() {
  Serial.println("═════ STATUS ═════");
  Serial.print("  Suhu:     "); Serial.print(temperature, 1); Serial.println(" °C");
  Serial.print("  Kelembaban: "); Serial.print(humidity, 1); Serial.println(" %");
  Serial.print("  Relay1:     "); Serial.println(relay1State ? "ON" : "OFF");
  Serial.print("  Relay2:     "); Serial.println(relay2State ? "ON" : "OFF");
  Serial.print("  Threshold: "); Serial.print(tempThreshold); Serial.print("°C / "); Serial.print(humidThreshold); Serial.println("%");
  Serial.println("══════════════════");
}