#include <Wire.h> 
#include <LiquidCrystal_I2C.h>

LiquidCrystal_I2C lcd(0x27, 16, 2); // Set the LCD address to 0x27 for a 16 chars and 2 line display

void setup() {
  Serial.begin(9600);  // Initialize serial communication
  lcd.init();                      // Initialize the LCD
  lcd.backlight();                 // Turn on backlight
  Serial.println("Enter Text:");
  lcd.clear();                     // Clear the display
}

void loop() {
  // Step 1: Take user input only once
  static String userInput;
  if (userInput.length() == 0) {
    userInput = getUserInput();
  }
  
  // Step 2: Scroll text from left to right and vanish
  scrollText(userInput);

  // Step 3: Collide with walls two times
  collideWithWalls(userInput);

  // Step 4: Center text and blink three times
  centerTextAndBlink(userInput);

  // Repeat the steps by clearing the LCD and using the same input
  lcd.clear();
  delay(1000); // Wait for 2 seconds before starting again
}

String getUserInput() {
  lcd.clear();
  lcd.setCursor(0, 0);
  while (!Serial.available()) {
    delay(100); // Wait for user input
  }
  String input = Serial.readString();
  return input;
}

void scrollText(String text) {
  for (int i = 0; i < text.length() + 16; i++) {
    lcd.clear();
    lcd.setCursor(i, 0);
    lcd.print(text);
    delay(200);
  }
}

void collideWithWalls(String text) {
  int lcdWidth = 16; // Assuming LCD width is 16 characters
  
  // Scroll text from left to right and collide
  for (int j = 0; j < 2; j++) {
    for (int i = 0; i <= lcdWidth - text.length(); i++) {
      lcd.clear();
      lcd.setCursor(i, 0);
      lcd.print(text);
      delay(200); // Adjust delay as needed for desired scrolling speed
    }

    // Scroll text from right to left and collide
    for (int i = lcdWidth - text.length(); i >= 0; i--) {
      lcd.clear();
      lcd.setCursor(i, 0);
      lcd.print(text);
      delay(200); // Adjust delay as needed for desired scrolling speed
    }
  }
}

void centerTextAndBlink(String text) {
  int lcdWidth = 16; // Assuming LCD width is 16 characters
  int centerOffset = (lcdWidth - text.length()) / 2;

  // Scroll text from left to center
  for (int i = 0; i <= centerOffset; i++) {
    lcd.clear();
    lcd.setCursor(i, 0);
    lcd.print(text);
    delay(200); // Adjust delay as needed for desired scrolling speed
  }

  // Blink text three times
  for (int j = 0; j < 4; j++) {
    lcd.clear();
    lcd.setCursor(centerOffset, 0);
    lcd.print(text);
    delay(400);
    lcd.clear();
    delay(400);
  }
}