#define BLYNK_TEMPLATE_ID "TMPL67QNUCguB"
#define BLYNK_TEMPLATE_NAME "ESP8266 RFID Door Lock"
#define BLYNK_AUTH_TOKEN "QzXVA1ia_Wh-g8KIlvcR9drmCrGYKXqW"
#define BLYNK_PRINT Serial
// Your WiFi credentials
#define WIFI_SSID "nopal"
#define WIFI_PASS "palpaljak"

#include <ESP8266WiFi.h>
#include <BlynkSimpleEsp8266.h>
#include <SPI.h>
#include <MFRC522.h>

// Pin Definitions using GPIO numbers
#define SS_PIN 2     // GPIO2 (D4 on NodeMCU)
#define RST_PIN 0    // GPIO0 (D3 on NodeMCU)
#define relay 4      // GPIO4 (D2 on NodeMCU)
#define BUZZER 15    // GPIO15 (D8 on NodeMCU)

MFRC522 mfrc522(SS_PIN, RST_PIN);
BlynkTimer timer;

int button1 = 0;
int button2 = 0;
int button3 = 0;
int manualControl = 0;  // Variable for V7 manual control

WidgetTerminal terminal(V2);

void setup()
{
  Serial.begin(115200);
  delay(100);
  
  WiFi.begin(WIFI_SSID, WIFI_PASS);
  Blynk.begin(BLYNK_AUTH_TOKEN, WIFI_SSID, WIFI_PASS);
  
  pinMode(relay, OUTPUT);
  digitalWrite(relay, HIGH);  // Initialize relay to OFF state
  pinMode(BUZZER, OUTPUT);
  digitalWrite(BUZZER, LOW);  // Initialize buzzer to OFF state
  
  SPI.begin();
  mfrc522.PCD_Init();
  timer.setInterval(1000L, iot_rfid);
}

void loop() {
  Blynk.run();
  timer.run();
  iot_rfid();
}

void iot_rfid()
{
  // If manual control is active, skip RFID checking
  if (manualControl == 1) {
    return;
  }

  // Prepare key - all keys are set to FFFFFFFFFFFFh at chip delivery from the factory.
  MFRC522::MIFARE_Key key;
  for (byte i = 0; i < 6; i++) {
    key.keyByte[i] = 0xFF;
  }
  
  // Look for new cards
  if (!mfrc522.PICC_IsNewCardPresent()) {
    return;
  }
  
  // Select one of the cards
  if (!mfrc522.PICC_ReadCardSerial()) {
    return;
  }
  
  // Dump UID
  Serial.print("Card UID:");
  for (byte i = 0; i < mfrc522.uid.size; i++) {
    Serial.print(mfrc522.uid.uidByte[i] < 0x10 ? " 0" : " ");
    Serial.print(mfrc522.uid.uidByte[i], DEC);
  }
  Serial.println();
  
  // Dump PICC type
  byte piccType = mfrc522.PICC_GetType(mfrc522.uid.sak);
  if (piccType != MFRC522::PICC_TYPE_MIFARE_MINI &&
      piccType != MFRC522::PICC_TYPE_MIFARE_1K &&
      piccType != MFRC522::PICC_TYPE_MIFARE_4K) {
    return;
  }

  // Check authorized cards
  if ((mfrc522.uid.uidByte[0] == 131) && (mfrc522.uid.uidByte[1] == 53) && 
      (mfrc522.uid.uidByte[2] == 160) && (mfrc522.uid.uidByte[3] == 19) && (button1 == 1))
  {
    Serial.println("Access Granted to Naufal");
    Blynk.virtualWrite(V2, "Access Granted to Naufal");
    digitalWrite(relay, HIGH);
    delay(5000);
    digitalWrite(relay, LOW);
  }
  else if ((mfrc522.uid.uidByte[0] == 134) && (mfrc522.uid.uidByte[1] == 96) && 
           (mfrc522.uid.uidByte[2] == 128) && (mfrc522.uid.uidByte[3] == 248) && (button2 == 1))
  {
    Serial.println("Access Granted to Mrs. Aashika");
    Blynk.virtualWrite(V2, "Access Granted to Mrs. Aashika");
    digitalWrite(relay, HIGH);
    delay(5000);
    digitalWrite(relay, LOW);
  }
  else if ((mfrc522.uid.uidByte[0] == 57) && (mfrc522.uid.uidByte[1] == 234) && 
           (mfrc522.uid.uidByte[2] == 176) && (mfrc522.uid.uidByte[3] == 109) && (button3 == 1))
  {
    Serial.println("Access Granted to Dr. Smith");
    Blynk.virtualWrite(V2, "Access Granted to Dr. Smith");
    digitalWrite(relay, HIGH);
    delay(5000);
    digitalWrite(relay, LOW);
  }
  else {
    Serial.println("Unregistered user");
    Blynk.virtualWrite(V2, "Unregistered user Trying to Access your Door Lock");
    Serial.println("Access denied");
    Blynk.virtualWrite(V2, "Access denied");
    digitalWrite(BUZZER, LOW);
    delay(2000);
    digitalWrite(BUZZER, HIGH);
  }
}

BLYNK_WRITE(V3)
{
  button1 = param.asInt();
}

BLYNK_WRITE(V4)
{
  button2 = param.asInt();
}

BLYNK_WRITE(V5)
{
  button3 = param.asInt();
}

// New function for manual control using V7
BLYNK_WRITE(V7)
{
  manualControl = param.asInt();
  if (manualControl == 1) {
    digitalWrite(relay, LOW); 
    Blynk.virtualWrite(V2, "Door Manually Closed");
  } else {
    digitalWrite(relay, HIGH); 
    Blynk.virtualWrite(V2, "Door Manually Opened");
  }
}