#define BLYNK_TEMPLATE_ID "TMPL6UNyDB6SB"
#define BLYNK_TEMPLATE_NAME "automated food storage"
#define BLYNK_AUTH_TOKEN "5Eu8EJTNM-L-wh6kt7HrYFFEmrv_JZuj"

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

// Define DHT sensor
#define DHTPIN 4 // DHT22 pin
#define DHTTYPE DHT22
DHT dht(DHTPIN, DHTTYPE);

// Define LEDs
#define COOLER_LED_PIN 12
#define DEHUMIDIFIER_LED_PIN 14
#define WIFI_STATUS_LED_PIN 27  // New LED for Wi-Fi status

// Define relays
#define RELAY_COOLER 10
#define RELAY_DEHUMIDIFIER 11

// Define slide switch
#define SWITCH_PIN 2

// Blynk auth token
char auth[] = BLYNK_AUTH_TOKEN;

// Wi-Fi credentials for Wokwi
char ssid[] = "Wokwi-GUEST";
char pass[] = "";

// Variables to store humidity and temperature readings
float humidity, temperature;

void setup() {
  // Initialize serial communication
  Serial.begin(115200);

  // Initialize DHT sensor
  Serial.println("Initializing DHT sensor...");
  dht.begin();

  // Initialize LEDs and relays
  pinMode(COOLER_LED_PIN, OUTPUT);
  pinMode(DEHUMIDIFIER_LED_PIN, OUTPUT);
  pinMode(WIFI_STATUS_LED_PIN, OUTPUT);  // Initialize Wi-Fi status LED pin
  pinMode(RELAY_COOLER, OUTPUT);
  pinMode(RELAY_DEHUMIDIFIER, OUTPUT);
  digitalWrite(COOLER_LED_PIN, LOW);
  digitalWrite(DEHUMIDIFIER_LED_PIN, LOW);
  digitalWrite(WIFI_STATUS_LED_PIN, LOW);  // Ensure Wi-Fi status LED is off initially
  digitalWrite(RELAY_COOLER, LOW);
  digitalWrite(RELAY_DEHUMIDIFIER, LOW);

  // Initialize slide switch
  pinMode(SWITCH_PIN, INPUT_PULLUP);

  // Initialize Wi-Fi and Blynk
  Serial.println("Connecting to Wi-Fi...");
  Blynk.begin(auth, ssid, pass);
}

void loop() {
  // Run Blynk
  Blynk.run();

  // Check Wi-Fi connection status and update the Wi-Fi status LED
  if (WiFi.status() == WL_CONNECTED) {
    digitalWrite(WIFI_STATUS_LED_PIN, HIGH);  // Turn on Wi-Fi status LED if connected
  } else {
    digitalWrite(WIFI_STATUS_LED_PIN, LOW);  // Turn off Wi-Fi status LED if not connected
  }

  // Check if the switch is in the ON position
  if (digitalRead(SWITCH_PIN) == LOW) {
    // Read sensor values
    humidity = dht.readHumidity();
    temperature = dht.readTemperature();

    // Check if any reads failed and exit early
    if (isnan(humidity) || isnan(temperature)) {
      Serial.println("Failed to read from DHT sensor!");
      delay(2000);
      return;
    }

    // Print temperature and humidity to serial monitor for debugging
    Serial.print("Temperature: ");
    Serial.print(temperature);
    Serial.print(" C, Humidity: ");
    Serial.print(humidity);
    Serial.println(" %");

    // Send data to Blynk
    Blynk.virtualWrite(V0, temperature);
    Blynk.virtualWrite(V1, humidity);

    // Control cooler based on temperature
    if (temperature > 10) {
      digitalWrite(COOLER_LED_PIN, HIGH);
      digitalWrite(RELAY_COOLER, HIGH);
      Blynk.virtualWrite(V2, 1); // Turn on cooler indicator in Blynk
    } else {
      digitalWrite(COOLER_LED_PIN, LOW);
      digitalWrite(RELAY_COOLER, LOW);
      Blynk.virtualWrite(V2, 0); // Turn off cooler indicator in Blynk
    }

    // Control dehumidifier based on humidity
    if (humidity > 35) {
      digitalWrite(DEHUMIDIFIER_LED_PIN, HIGH);
      digitalWrite(RELAY_DEHUMIDIFIER, HIGH);
      Blynk.virtualWrite(V3, 1); // Turn on dehumidifier indicator in Blynk
    } else {
      digitalWrite(DEHUMIDIFIER_LED_PIN, LOW);
      digitalWrite(RELAY_DEHUMIDIFIER, LOW);
      Blynk.virtualWrite(V3, 0); // Turn off dehumidifier indicator in Blynk
    }

    delay(2000); // Delay for sensor reading interval
  } else {
    // System is off, turn off all outputs
    digitalWrite(COOLER_LED_PIN, LOW);
    digitalWrite(DEHUMIDIFIER_LED_PIN, LOW);
    digitalWrite(RELAY_COOLER, LOW);
    digitalWrite(RELAY_DEHUMIDIFIER, LOW);
    delay(1000); // Delay to avoid bouncing issues
  }
}