#include <ESP32Servo.h>      // Include ESP32-specific Servo library
#include <WiFi.h>
#include <LiquidCrystal.h>   // For the 16x2 LCD
#include <Keypad.h>          // For the keypad

// Wi-Fi credentials
const char* ssid = "Wokwi-GUEST";
const char* wifiPassword = "";

// Define the lock password
String correctPassword = "1234";
String enteredPassword = "";

// Define LCD pins and initialize LCD
LiquidCrystal lcd(16, 17, 18, 19, 21, 22);  // RS, E, D4, D5, D6, D7

// Setup LED and Servo
int ledPin = 5;  // GPIO 5 for LED
Servo myServo;   // Servo motor

// Setup 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] = {14, 27, 26, 25};  // Connect to the row pinouts of the keypad
byte colPins[COLS] = {33, 32, 13, 12};  // Connect to the column pinouts of the keypad
Keypad keypad = Keypad(makeKeymap(keys), rowPins, colPins, ROWS, COLS);

// Function to unlock the door
void unlockDoor() {
  digitalWrite(ledPin, HIGH);  // Turn on LED
  myServo.write(90);           // Unlock door (adjust angle based on setup)
  lcd.clear();
  lcd.print("Door Unlocked!");
  delay(2000);                 // Keep unlocked for 2 seconds
  digitalWrite(ledPin, LOW);   // Turn off LED
  myServo.write(0);            // Lock door back
  lcd.clear();
  lcd.print("Door Locked");
}

/* Commented out: Function to get password from web server
void getPassword() {
  if (WiFi.status() == WL_CONNECTED) {
    HTTPClient http;
    String url = "https://cosmic-tiramisu-c4f697.netlify.app/get-password";  // Ensure this matches server URL and port
    http.begin(url);
    http.addHeader("Content-Type", "application/x-www-form-urlencoded");

    int httpCode = http.GET();
    if (httpCode == HTTP_CODE_OK) {
      String payload = http.getString();
      Serial.println("Received Password: " + payload);

      if (payload == correctPassword) {
        Serial.println("Correct password from server!");
        unlockDoor();
      } else {
        Serial.println("Incorrect password or no password set.");
      }
    } else {
      Serial.println("Error on HTTP request: " + String(httpCode));
    }
    http.end();
  } else {
    Serial.println("WiFi Disconnected");
  }
}
*/

void setup() {
  Serial.begin(115200);

  // Initialize LCD
  lcd.begin(16, 2);  // Set up the LCD's number of columns and rows
  lcd.setCursor(0, 0);
  lcd.print("Door Locked");

  // Initialize LED and Servo
  pinMode(ledPin, OUTPUT);
  myServo.attach(15);  // Attach servo to GPIO 15
  myServo.write(0);    // Start with door locked

  // Setup Wi-Fi
  WiFi.begin(ssid, wifiPassword);
  Serial.print("Connecting to Wi-Fi");
  while (WiFi.status() != WL_CONNECTED) {
    delay(1000);
    Serial.print(".");
  }
  Serial.println("\nConnected to Wi-Fi");
  Serial.print("IP address: ");
  Serial.println(WiFi.localIP());

  // Initialize Keypad prompt
  lcd.clear();
  lcd.print("Enter Password:");
}

void loop() {
  // Handle keypad input
  char key = keypad.getKey();
  if (key) {
    Serial.println(key); // Debugging: print the pressed key
    if (key == '#') { // Submit password
      lcd.clear();
      if (enteredPassword == correctPassword) {
        unlockDoor();  // Unlock the door
      } else {
        lcd.print("Wrong Password");
        delay(2000); // Display wrong password message for 2 seconds
      }
      enteredPassword = ""; // Reset password after submission
      lcd.clear();
      lcd.print("Enter Password:");
    } else if (key == '*') { // Clear entered password
      enteredPassword = "";
      lcd.clear();
      lcd.print("Enter Password:");
    } else {
      enteredPassword += key;  // Add the key to the entered password
      lcd.setCursor(0, 1);
      lcd.print(enteredPassword);
    }
  }
}


  delay(1000); // Delay for next loop iteration
}