#define BLYNK_TEMPLATE_ID "TMPL3sEFkpMVI"
#define BLYNK_TEMPLATE_NAME "Office Lighting System"
#define BLYNK_AUTH_TOKEN "ms_E6IPSXChfNbkVxcMNjPc3_bgN7b-J"
#define BLYNK_PRINT Serial
#include <Wire.h>
#include <Adafruit_GFX.h>
#include <Adafruit_SSD1306.h>
#include <WiFi.h>
#include <WiFiClient.h>
#include <BlynkSimpleEsp32.h>  // Include Blynk library for ESP32

#define SCREEN_WIDTH 128
#define SCREEN_HEIGHT 64

BlynkTimer timer;

float lux;
int kondisiRelay1;
int kondisiRelay2;
int pirValue;
int ldrValue;
const int RelayPin1 = 18;
const int RelayPin2 = 15;
const float GAMMA = 0.7;
const float RL10 = 50;

Adafruit_SSD1306 display(SCREEN_WIDTH, SCREEN_HEIGHT, &Wire, -1);

const int ldrPin = 34;
const int pirPin = 2;

#define timeSeconds 10
unsigned long lastTrigger = 0;

char auth[] = "ms_E6IPSXChfNbkVxcMNjPc3_bgN7b-J";  // Replace with your Blynk auth token
char ssid[] = "Wokwi-GUEST";          // Replace with your WiFi SSID
char pass[] = "";      // Replace with your WiFi password

bool blynkRelayState1 = false;  // Track relay state from Blynk command
bool blynkRelayState2 = false;  // Track relay state from Blynk command

void kirimdata(){
  Blynk.virtualWrite(V1, lux);
  Blynk.virtualWrite(V2, kondisiRelay1);
  Blynk.virtualWrite(V3, kondisiRelay2);
}

void setup() {
  pinMode(ldrPin, INPUT);
  pinMode(pirPin, INPUT);
  pinMode(RelayPin1, OUTPUT);
  pinMode(RelayPin2, OUTPUT);

  // Set initial relay states to OFF
  //digitalWrite(RelayPin1, LOW);
  //digitalWrite(RelayPin2, LOW);

  Serial.begin(115200);

  Blynk.begin(auth, ssid, pass);
  timer.setInterval(1000L, kirimdata);

  if (!display.begin(SSD1306_SWITCHCAPVCC, 0x3C)) {
    Serial.println(F("SSD1306 allocation failed"));
    for (;;);
  }
  delay(2000);
  display.clearDisplay();

  display.setTextSize(2);
  display.setTextColor(WHITE);
  display.setCursor(15, 17);
  display.println("LUX Meter");
  display.setTextSize(1);
  display.setTextColor(WHITE);
  display.setCursor(28, 40);
  display.println("by : Husein");
  display.display();

  delay(5000);
}

void loop() {
  Blynk.run();  // Allow Blynk to handle communication
  timer.run();

  pirValue = digitalRead(pirPin);
  ldrValue = analogRead(ldrPin);
  kondisiRelay1 = digitalRead(RelayPin1);
  kondisiRelay2 = digitalRead(RelayPin2);
    
  float voltage = ldrValue / 4095. * 5;
  float resistance = 2000 * voltage / (1 - voltage / 5);
  lux = pow(RL10 * 1e3 * pow(10, GAMMA) / resistance, (1 / GAMMA));

  // ... (sensor readings)

  // OLED display update
  display.clearDisplay();
  display.setTextSize(1);
  display.setTextColor(WHITE);
  display.setCursor(33, 28);
  display.println("LUX : ");
  display.setTextSize(1);
  display.setTextColor(WHITE);
  display.setCursor(62, 28);
  display.println(lux);
  display.display();

  // Check if Blynk has sent an ON command
  if (!blynkRelayState1) {
    digitalWrite(RelayPin1, HIGH);  // Turn on the relay
    Serial.println("Blynk Command: LED 1 ON");

  } else {
    // LED control based on Lux and PIR
    if (lux < 300 && pirValue == HIGH) {
      digitalWrite(RelayPin1, HIGH);  // Turn on the relay
      Serial.println("Motion Detected! LED 1 ON");
    }
    // LED turn-off condition
      else if (lux > 600 || (pirValue == LOW && millis() - lastTrigger > (timeSeconds * 1000))) {
        digitalWrite(RelayPin1, LOW);  // Turn off the relay
        Serial.println("LED 1 OFF");
      }
    if (pirValue == HIGH){
      lastTrigger = millis();
    }

  delay(500);  // Delay for stability
  }

  if (!blynkRelayState2) {
    digitalWrite(RelayPin2, HIGH);  // Turn on the second relay
    Serial.println("Blynk Command: LED 2 ON");

  } else {
    // LED control based on Lux and PIR for the second relay
    if (lux < 100 && pirValue == HIGH) {
      digitalWrite(RelayPin2, HIGH);  // Turn on the second relay
      Serial.println("Motion Detected! LED 2 ON");
    }
      else if (lux > 1000 || (pirValue == LOW && millis() - lastTrigger > (timeSeconds * 1000))) {
        digitalWrite(RelayPin2, LOW);  // Turn off the second relay
        Serial.println("LED 2 OFF");
    }

    if (pirValue == HIGH) {
      lastTrigger = millis();
    }

    delay(500);  // Delay for stability
  }
}

BLYNK_WRITE(V0) {  // Blynk virtual pin for relay control
  int relayControl = param.asInt();  // Get the value from the Blynk app

  if (relayControl == 1) {
    // Set the relay state from Blynk command
    blynkRelayState1 = true;
    Serial.println("Blynk Command: LED 1 ON");
  } 
  else if (relayControl == 0) {
    // Set the relay state from Blynk command
    blynkRelayState1 = false;
    Serial.println("Blynk Command: LED 1 OFF");
    digitalWrite(RelayPin1, LOW);
    Serial.println("LED 1 OFF");
  }
}

BLYNK_WRITE(V4) {  // Blynk virtual pin for the second relay control
  int relayControl = param.asInt();  // Get the value from the Blynk app

  if (relayControl == 1) {
    // Set the relay state from Blynk command for the second relay
    blynkRelayState2 = true;
    Serial.println("Blynk Command: LED 2 ON");
  } else if (relayControl == 0) {
    // Set the relay state from Blynk command for the second relay
    blynkRelayState2 = false;
    Serial.println("Blynk Command: LED 2 OFF");
    digitalWrite(RelayPin2, LOW);
    Serial.println("LED 2 OFF");
  }
}