#include <Keypad.h>
#include <Wire.h>
#include <LiquidCrystal_I2C.h>
#include <ESP32Servo.h>
#include <WiFi.h>
#include <HTTPClient.h>
#include <SPI.h>
#include <MFRC522.h>

// --- LCD ---
LiquidCrystal_I2C lcd(0x27, 16, 2);

// --- Servo ---
Servo myservo;
const int servoPin = 4;
const int unlockPos = 90;
const int lockPos = 0;

// --- Buzzer ---
const int buzzerPin = 15;

// --- Keypad ---
const byte ROWS = 4;
const byte COLS = 4;
char keys[ROWS][COLS] = {
  {'1','2','3','A'},
  {'4','5','6','B'},
  {'7','8','9','C'},
  {'*','0','#','D'}
};
byte rowPins[ROWS] = {13, 12, 14, 27};
byte colPins[COLS] = {26, 25, 33, 32};
Keypad keypad = Keypad(makeKeymap(keys), rowPins, colPins, ROWS, COLS);

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

// --- Twilio WhatsApp ---
const char* twilioServer = "https://api.twilio.com/2010-04-01/Accounts/AC7461aa338aa1ff8d1307b52afcb5174d/Messages.json";
String accountSid = "AC7461aa338aa1ff8d1307b52afcb5174d";
String authToken = "5RX3CJ6RR7SRVYL19YU9JA6C";
String fromNumber = "whatsapp:+14155238886";
String toNumber = "whatsapp:+212604275689";

// --- RFID ---
#define SS_PIN 5
#define RST_PIN 22
MFRC522 rfid(SS_PIN, RST_PIN);
String authorizedUID = "A1B2C3D4"; // Remplacez par votre UID réel

// --- Variables ---
String inputCode = "";
const String correctPassword = "1414";
int wrongAttempts = 0;

void sendWhatsAppMessage(String message) {
  if (WiFi.status() == WL_CONNECTED) {
    HTTPClient http;
    http.begin(twilioServer);
    http.setAuthorization(accountSid.c_str(), authToken.c_str());
    http.addHeader("Content-Type", "application/x-www-form-urlencoded");

    String body = "From=" + fromNumber +
                  "&To=" + toNumber +
                  "&Body=" + message;

    int httpResponseCode = http.POST(body);
    Serial.print("Réponse Twilio : ");
    Serial.println(httpResponseCode);
    http.end();
  } else {
    Serial.println("WiFi non connecté !");
  }
}

void unlockDoor() {
  Serial.println("Déverrouillage...");
  myservo.write(unlockPos);
  delay(5000);
  lockDoor();
}

void lockDoor() {
  myservo.write(lockPos);
  lcd.clear();
  lcd.print("Porte fermee");
  delay(1000);
  lcd.clear();
  lcd.print("Entrer code:");
}

void setup() {
  Serial.begin(115200);
  lcd.init();
  lcd.backlight();
  lcd.print("Initialisation...");

  myservo.attach(servoPin);
  myservo.write(lockPos);
  pinMode(buzzerPin, OUTPUT);
  digitalWrite(buzzerPin, LOW);

  SPI.begin();
  rfid.PCD_Init();

  WiFi.begin(ssid, password);
  while (WiFi.status() != WL_CONNECTED) {
    delay(500);
    Serial.print(".");
  }
  Serial.println("WiFi connecte");

  lcd.clear();
  lcd.print("Entrer code:");
}

void loop() {
  // --- Lecture RFID ---
  if (rfid.PICC_IsNewCardPresent() && rfid.PICC_ReadCardSerial()) {
    String uid = "";
    for (byte i = 0; i < rfid.uid.size; i++) {
      uid += String(rfid.uid.uidByte[i] < 0x10 ? "0" : "");
      uid += String(rfid.uid.uidByte[i], HEX);
    }
    uid.toUpperCase();
    Serial.print("Carte lue: "); Serial.println(uid);
    rfid.PICC_HaltA();

    if (uid == authorizedUID) {
      lcd.clear();
      lcd.print("Carte valide");
      unlockDoor();
    } else {
      lcd.clear();
      lcd.print("Carte inconnue");
      sendWhatsAppMessage("🚨 Accès refusé: Carte RFID non reconnue");
      tone(buzzerPin, 1000, 1500);
      delay(1500);
      lcd.clear();
      lcd.print("Entrer code:");
    }
  }

  // --- Lecture clavier ---
  char key = keypad.getKey();
  if (key) {
    if (key == '#') {
      if (inputCode == correctPassword) {
        lcd.clear();
        lcd.print("Code correct");
        wrongAttempts = 0;
        unlockDoor();
      } else {
        wrongAttempts++;
        lcd.clear();
        lcd.print("Code incorrect");
        if (wrongAttempts >= 2) {
          sendWhatsAppMessage("🚨 2 tentatives de code échouées !");
          tone(buzzerPin, 1000, 2000);
          wrongAttempts = 0;
        } else {
          tone(buzzerPin, 1000, 1000);
          sendWhatsAppMessage("🚨 Code incorrect saisi !");
        }
        delay(1000);
        lcd.clear();
        lcd.print("Entrer code:");
      }
      inputCode = "";
    } else if (key == '*') {
      inputCode = "";
      lcd.clear();
      lcd.print("Efface");
      delay(500);
      lcd.clear();
      lcd.print("Entrer code:");
    } else {
      if (inputCode.length() < 10) {
        inputCode += key;
        lcd.setCursor(inputCode.length() - 1, 1);
        lcd.print("*");
      }
    }
  }
}