#include <WiFi.h>
#include <HTTPClient.h>

const char* ssid = "Wokwi-GUEST";       // WiFi ฟรีใน Wokwi
const char* password = "";              // ไม่มีรหัสผ่าน
const char* serverName = "https://webhook.site/d7b37e1c-8e19-4568-b78a-6aa6a0bb267f";  
// นำ URL ของคุณจาก webhook.site มาใส่ตรงนี้

const int ldr = 33; 
const int led = 4;  

int lastState = -1; // เก็บสถานะไฟครั้งก่อน

void setup() {
  pinMode(led, OUTPUT);
  Serial.begin(115200);

  // เชื่อมต่อ WiFi
  WiFi.begin(ssid, password);
  Serial.print("Connecting to WiFi");
  while (WiFi.status() != WL_CONNECTED) {
    delay(500);
    Serial.print(".");
  }
  Serial.println("\nWiFi connected!");
}

void loop() {
  int photoresistor = analogRead(ldr);
  Serial.print("LDR Value: ");
  Serial.println(photoresistor);

  int currentState;
  if (photoresistor > 2000) { 
    digitalWrite(led, HIGH); 
    currentState = 1;  // เปิดไฟ
  } else {
    digitalWrite(led, LOW); 
    currentState = 0;  // ปิดไฟ
  }

  // ถ้ามีการเปลี่ยนสถานะไฟ → ส่ง webhook
  if (currentState != lastState) {
    sendToWebhook(currentState, photoresistor);
    lastState = currentState;
  }

  delay(500);
}

void sendToWebhook(int state, int lightValue) {
  if (WiFi.status() == WL_CONNECTED) {
    HTTPClient http;
    http.begin(serverName);
    http.addHeader("Content-Type", "application/json");

    String payload = "{";
    payload += "\"status\":\"" + String(state == 1 ? "ON" : "OFF") + "\",";
    payload += "\"light\":" + String(lightValue);
    payload += "}";

    int httpResponseCode = http.POST(payload);

    Serial.print("HTTP Response code: ");
    Serial.println(httpResponseCode);
    http.end();
  } else {
    Serial.println("WiFi disconnected");
  }
}