#include <WiFi.h>
#include <PubSubClient.h>

// Replace with your network credentials
const char* ssid = "Wokwi-GUEST";
const char* password = "";

// MQTT broker details
const char* mqtt_server = "test.mosquitto.org";

WiFiClient espClient;
PubSubClient client(espClient);

const int LDR_PIN = 34; // Analog pin connected to LDR
const int LED_PIN = 5;  // Digital pin connected to LED

void setup() {
  Serial.begin(115200);
  setup_wifi();
  client.setServer(mqtt_server, 1883);
}

void setup_wifi() {
  delay(10);
  Serial.println();
  Serial.print("Connecting to ");
  Serial.println(ssid);

  WiFi.begin(ssid, password);

  while (WiFi.status() != WL_CONNECTED) {
    delay(500);
    Serial.print(".");
  }

  Serial.println("");
  Serial.println("WiFi connected");
  Serial.println("IP address: ");
  Serial.println(WiFi.localIP());
}

void reconnect() {
  while (!client.connected()) {
    Serial.print("Attempting MQTT connection...");
    if (client.connect("ESP32Client")) {
      Serial.println("connected");
    } else {
      Serial.print("failed, rc=");
      Serial.print(client.state());
      Serial.println(" try again in 5 seconds");
      delay(5000);
    }
  }
}

void loop() {
  if (!client.connected()) {
    reconnect();
  }
  client.loop();

  int ldrValue = analogRead(LDR_PIN);
  float normalizedValue = ldrValue / 4095.0; // Normalize to range 0-1
  char msg[8];
  dtostrf(normalizedValue, 1, 2, msg);

  Serial.print("Light Intensity: ");
  Serial.println(msg);

  
  Serial.print("Light Intensity normalizedValue: ");
  Serial.println(normalizedValue);

  // Control LED based on light intensity
  if (normalizedValue > 0.5) {
    analogWrite(LED_PIN, HIGH);
  } else {
    analogWrite(LED_PIN, LOW);
  }

  client.publish("medibox/lightIntensity", msg);
  delay(2000); // Publish every 2 seconds
}