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

const char* ssid = "Wokwi-GUEST";
const char* password = "";

// 🔴 YOUR REAL CLOUD SERVER
const char* serverURL = "https://smart-login-1.onrender.com/attendance";

const int GREEN_LED = 26;
const int RED_LED   = 27;

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

  WiFi.begin(ssid, password);
  while (WiFi.status() != WL_CONNECTED) delay(300);

  Serial.println("WiFi Connected");
}

void loop() {
  Serial.println("---- LOOP START ----");

  WiFiClientSecure client;
  client.setInsecure();

  HTTPClient http;

  Serial.println("Starting HTTP connection...");
  http.begin(client, serverURL);
  http.addHeader("Content-Type", "application/json");

  String payload = "{\"rfid_uid\":\"A1B2C3D4\"}";
  Serial.println("Sending payload:");
  Serial.println(payload);

  int httpCode = http.POST(payload);

  Serial.print("HTTP Code: ");
  Serial.println(httpCode);

  if (httpCode > 0) {
    String response = http.getString();
    Serial.println("Server Response:");
    Serial.println(response);

    if (response.indexOf("ALLOW") != -1) {
      digitalWrite(GREEN_LED, HIGH);
      digitalWrite(RED_LED, LOW);
      Serial.println("ACCESS ALLOWED");
    } else {
      digitalWrite(GREEN_LED, LOW);
      digitalWrite(RED_LED, HIGH);
      Serial.println("ACCESS DENIED");
    }
  } else {
    Serial.println("HTTP REQUEST FAILED");
  }

  http.end();

  Serial.println("---- LOOP END ----");
  delay(5000);
}