#include <WiFi.h>        // For ESP32. If using Arduino with WiFi shield, use <WiFi101.h> or appropriate WiFi library.
#include <WiFiClient.h>  // Use WiFiClient for HTTP requests.

#define LDR_PIN A0      // For Arduino, A0 is used for analog input
#define LED_PIN 13      // Common digital pin for LED
const char* ssid = "Wokwi-GUEST";
const char* password = "";

// Replace these with your ThingSpeak credentials
const char* thingSpeakServer = "http://api.thingspeak.com/update";
const char* writeAPIKey = "39SNENCWNDY86C1Z";
int a;

void setup() {
  Serial.begin(9600);
  // Initialize pins
  pinMode(LDR_PIN, INPUT);
  pinMode(LED_PIN, OUTPUT);
  // Connect to Wi-Fi
  WiFi.begin(ssid, password);
  while (WiFi.status() != WL_CONNECTED) {
    delay(500);
    Serial.print(".");
  }
  Serial.println("Connected to WiFi!");
}

void loop() {
  int ldrValue = 0;
  // Average multiple readings for better stability
  for (int i = 0; i < 10; i++) {
    ldrValue += analogRead(LDR_PIN);
    delay(10); // Small delay between readings
  }
  ldrValue /= 10; // Average the readings

  if (ldrValue > 1121) {  // Low light
    digitalWrite(LED_PIN, HIGH);
    a = HIGH;
  } else if (ldrValue < 1120) { // High light
    digitalWrite(LED_PIN, LOW);
    a = LOW;
  }
  sendDataToThingSpeak(ldrValue, a);
  Serial.println("LDR Value:");
  Serial.println(ldrValue);
  Serial.println("LED State:");
  Serial.println(a);
  delay(5000); // Delay before next reading
}

void sendDataToThingSpeak(int lux, int a) {
  if (WiFi.status() == WL_CONNECTED) {
    WiFiClient client;
    String url = "/update?api_key=" + String(writeAPIKey) + "&field1=" + String(lux) + "&field2=" + String(a);
    
    if (client.connect(thingSpeakServer, 80)) { // Connect to ThingSpeak server on port 80
      client.println("GET " + url + " HTTP/1.1");
      client.println("Host: " + String(thingSpeakServer));
      client.println("Connection: close");
      client.println();
      
      // Wait for response from server
      while (client.connected() || client.available()) {
        if (client.available()) {
          String line = client.readStringUntil('\n');
          Serial.println(line);
        }
      }
      client.stop(); // Close connection
    } else {
      Serial.println("Connection to ThingSpeak failed");
    }
  } else {
    Serial.println("Error: Not connected to WiFi");
  }
}